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(seg_bytes;)420 1446 A
2370(/*)S
(how)126 2496 A
(big)126 2664 A
2832(is)S
(the)126 2958 A
(segment)294 3126 A
3462(*/)S
1080 V
(17502)210 648 A
1026({)S
1170 V
(17503)210 648 A
1026(/*)S
(Read)168 1152 A
1362(in)S
(text)168 1488 A
1698(or)S
(data)168 1824 A
(from)168 2034 A
(the)126 2244 A
(exec)168 2412 A
(file)168 2622 A
(and)126 2832 A
(copy)168 3000 A
3210(to)S
(the)126 3336 A
(new)126 3504 A
(core)168 3672 A
(image.)252 3882 A
1260 V
(17504)210 648 A
1068(*)S
(This)168 1152 A
(procedure)378 1362 A
1782(is)S
1908(a)S
(little)252 1992 A
(bit)126 2286 A
(tricky.)294 2454 A
(The)126 2832 A
(logical)294 3000 A
(way)126 3336 A
3504(to)S
(load)168 3630 A
3840(a)S
(segment)294 3924 A
1350 V
(17505)210 648 A
1068(*)S
(would)210 1152 A
1404(be)S
1530(to)S
(read)168 1656 A
1866(it)S
(block)210 1992 A
2244(by)S
(block)210 2370 A
(and)126 2622 A
(copy)168 2790 A
(each)168 3000 A
(block)210 3210 A
3462(to)S
(the)126 3588 A
(user)168 3756 A
(space)210 3966 A
1440 V
(17506)210 648 A
1068(*)S
(one)126 1152 A
1320(at)S
1446(a)S
(time.)210 1530 A
(This)168 1824 A
2034(is)S
(too)126 2160 A
(slow,)210 2328 A
2580(so)S
2706(we)S
2832(do)S
(something)378 2958 A
(dirty)210 3378 A
(here,)210 3630 A
(namely)252 3882 A
1530 V
(17507)210 648 A
1068(*)S
(send)168 1152 A
(the)126 1362 A
(user)168 1530 A
(space)210 1740 A
(and)126 1992 A
(virtual)294 2160 A
(address)294 2496 A
2832(to)S
(the)126 2958 A
(file)168 3126 A
(system)252 3336 A
3630(in)S
(the)126 3756 A
(upper)210 3924 A
1620 V
(17508)210 648 A
1068(*)S
1152(10)S
(bits)168 1278 A
1488(of)S
(the)126 1614 A
(file)168 1782 A
(descriptor,)462 1992 A
(and)126 2496 A
(pass)168 2664 A
2874(it)S
(the)126 3000 A
(user)168 3168 A
(virtual)294 3378 A
(address)294 3714 A
1710 V
(17509)210 648 A
1068(*)S
(instead)294 1152 A
1488(of)S
1614(a)S
1698(MM)S
(address.)336 1824 A
(The)126 2244 A
(file)168 2412 A
(system)252 2622 A
(extracts)336 2916 A
(these)210 3294 A
(parameters)420 3546 A
(when)168 4008 A
1800 V
(17510)210 648 A
1068(*)S
(gets)168 1152 A
1362(a)S
(read)168 1446 A
(call)168 1656 A
(from)168 1866 A
(the)126 2076 A
(memory)252 2244 A
(manager,)336 2538 A
(which)210 2916 A
3168(is)S
(the)126 3294 A
(only)168 3462 A
(process)294 3672 A
(that)168 4008 A
1890 V
(17511)210 648 A
1068(*)S
1152(is)S
(permitted)378 1278 A
1698(to)S
(use)126 1824 A
(this)168 1992 A
(trick.)252 2202 A
(The)126 2538 A
(file)168 2706 A
(system)252 2916 A
(then)168 3210 A
(copies)252 3420 A
(the)126 3714 A
(whole)210 3882 A
1980 V
(17512)210 648 A
1068(*)S
(segment)294 1152 A
(directly)336 1488 A
1866(to)S
(user)168 1992 A
(space,)252 2202 A
(bypassing)378 2496 A
2916(MM)S
(completely.)462 3042 A
2070 V
(17513)210 648 A
1068(*/)S
2160 V
(17514)210 648 A
2250 V
(17515)210 648 A
(int)126 1110 A
(new_fd,)294 1278 A
(bytes;)252 1614 A
2340 V
(17516)210 648 A
(char)168 1110 A
(*ubuf_ptr;)420 1320 A
2430 V
(17517)210 648 A
2520 V
(17518)210 648 A
(new_fd)252 1110 A
1404(=)S
((who)168 1488 A
1698(<<)S
1824(8))S
1950(|)S
((seg)168 2034 A
2244(<<)S
2370(6))S
2496(|)S
(fd;)126 2580 A
2610 V
(17519)210 648 A
(ubuf_ptr)336 1110 A
1488(=)S
((char)210 1572 A
1824(*))S
(((vir_bytes)mp->mp_seg[seg].mem_vir)1470 1950 A
3462(<<)S
(CLICK_SHIFT);)546 3588 A
2700 V
(17520)210 648 A
(while)210 1110 A
((seg_bytes)420 1362 A
1824(!=)S
1950(0))S
2076({)S
2790 V
(17521)210 648 A
(bytes)210 1362 A
1614(=)S
((INT_MAX)336 1698 A
2076(/)S
(BLOCK_SIZE))462 2160 A
2664(*)S
(BLOCK_SIZE;)462 2748 A
2880 V
(17522)210 648 A
1362(if)S
((seg_bytes)420 1488 A
1950(<)S
(bytes))252 2034 A
2970 V
(17523)210 648 A
(bytes)210 1698 A
1950(=)S
((int)seg_bytes;)630 2034 A
3060 V
(17524)210 648 A
1362(if)S
((read(new_fd,)546 1488 A
(ubuf_ptr,)378 2076 A
(bytes))252 2496 A
2790(!=)S
(bytes))252 2916 A
3150 V
(17525)210 648 A
(break;)252 1698 A
2370(/*)S
(error)210 2496 A
2748(*/)S
3240 V
(17526)210 648 A
(ubuf_ptr)336 1362 A
1740(+=)S
(bytes;)252 1866 A
3330 V
(17527)210 648 A
(seg_bytes)378 1362 A
1782(-=)S
(bytes;)252 1908 A
3420 V
(17528)210 648 A
1110(})S
3510 V
(17529)210 648 A
1026(})S
3780 V
(17532)210 648 A
(/*===========================================================================*)3276 1026 A
3870 V
(17533)210 648 A
1068(*)S
(find_share)420 2370 A
4260(*)S
3960 V
(17534)210 648 A
(*===========================================================================*/)3276 1068 A
4050 V
(17535)210 648 A
(PUBLIC)252 1026 A
(struct)252 1320 A
(mproc)210 1614 A
(*find_share(mp_ign,)798 1866 A
(ino,)168 2706 A
(dev,)168 2916 A
(ctime))252 3126 A
4140 V
(17536)210 648 A
(struct)252 1026 A
(mproc)210 1320 A
(*mp_ign;)336 1572 A
2370(/*)S
(process)294 2496 A
(that)168 2832 A
(should)252 3042 A
(not)126 3336 A
3504(be)S
(looked)252 3630 A
3924(at)S
4050(*/)S
4230 V
(17537)210 648 A
(ino_t)210 1026 A
(ino;)168 1278 A
2370(/*)S
(parameters)420 2496 A
(that)168 2958 A
(uniquely)336 3168 A
(identify)336 3546 A
3924(a)S
(file)168 4008 A
4218(*/)S
4320 V
(17538)210 648 A
(dev_t)210 1026 A
(dev;)168 1278 A
4410 V
(17539)210 648 A
(time_t)252 1026 A
(ctime;)252 1320 A
4500 V
(17540)210 648 A
1026({)S
4590 V
(17541)210 648 A
1026(/*)S
(Look)168 1152 A
(for)126 1362 A
1530(a)S
(process)294 1614 A
(that)168 1950 A
2160(is)S
(the)126 2286 A
(file)168 2454 A
(<ino,)210 2664 A
(dev,)168 2916 A
(ctime>)252 3126 A
3420(in)S
(execution.)420 3546 A
(Don't)210 4050 A
4680 V
(17542)210 648 A
1068(*)S
(accidentally)504 1152 A
("find")252 1698 A
(mp_ign,)294 1992 A
(because)294 2328 A
2664(it)S
2790(is)S
(the)126 2916 A
(process)294 3084 A
3420(on)S
(whose)210 3546 A
(behalf)252 3798 A
(this)168 4092 A
4770 V
(17543)210 648 A
1068(*)S
(call)168 1152 A
1362(is)S
(made.)210 1488 A
4860 V
(17544)210 648 A
1068(*/)S
4950 V
(17545)210 648 A
(struct)252 1110 A
(mproc)210 1404 A
(*sh_mp;)294 1656 A
5040 V
(17546)210 648 A
5130 V
(17547)210 648 A
(for)126 1110 A
((sh_mp)252 1278 A
1572(=)S
(&mproc[INIT_PROC_NR];)882 1656 A
(sh_mp)210 2580 A
2832(<)S
(&mproc[NR_PROCS];)714 2916 A
(sh_mp++))336 3672 A
4050({)S
5220 V
(17548)210 648 A
1362(if)S
(((sh_mp->mp_flags)714 1488 A
2244(&)S
((IN_USE)294 2328 A
2664(|)S
(HANGING)294 2748 A
3084(|)S
(SEPARATE)))420 3168 A
5310 V
(17549)210 648 A
2706(!=)S
((IN_USE)294 2832 A
3168(|)S
(SEPARATE)))420 3252 A
(continue;)378 3714 A
5400 V
(17550)210 648 A
1362(if)S
((sh_mp)252 1488 A
1782(==)S
(mp_ign))294 1908 A
(continue;)378 2244 A
5490 V
(17551)210 648 A
1362(if)S
((sh_mp->mp_ino)588 1488 A
2118(!=)S
(ino))168 2244 A
(continue;)378 2454 A
5580 V
(17552)210 648 A
1362(if)S
((sh_mp->mp_dev)588 1488 A
2118(!=)S
(dev))168 2244 A
(continue;)378 2454 A
5670 V
(17553)210 648 A
1362(if)S
((sh_mp->mp_ctime)672 1488 A
2202(!=)S
(ctime))252 2328 A
(continue;)378 2622 A
5760 V
(17554)210 648 A
(return)252 1362 A
(sh_mp;)252 1656 A
5850 V
(17555)210 648 A
1110(})S
5940 V
(17556)210 648 A
(return(NULL);)546 1110 A
6030 V
(17557)210 648 A
1026(})S
8418 V
EP
%%Page: 244 244
BP
/slant 0 def
/height 0 def
630 V
12 B
(244)180 648 A
11 R
2077(File:)S
2310(src/mm/break.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
990 V
7 LST
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1080 V
(src/mm/break.c)588 2034 A
1170 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1350 V
(17600)210 648 A
1026(/*)S
(The)126 1152 A
(MINIX)210 1320 A
(model)210 1572 A
1824(of)S
(memory)252 1950 A
(allocation)420 2244 A
(reserves)336 2706 A
3084(a)S
(fixed)210 3168 A
(amount)252 3420 A
3714(of)S
(memory)252 3840 A
(for)126 4134 A
1440 V
(17601)210 648 A
1068(*)S
(the)126 1152 A
(combined)336 1320 A
(text,)210 1698 A
(data,)210 1950 A
(and)126 2202 A
(stack)210 2370 A
(segments.)378 2622 A
(The)126 3084 A
(amount)252 3252 A
(used)168 3546 A
(for)126 3756 A
3924(a)S
(child)210 4008 A
1530 V
(17602)210 648 A
1068(*)S
(process)294 1152 A
(created)294 1488 A
1824(by)S
(FORK)168 1950 A
2160(is)S
(the)126 2286 A
(same)168 2454 A
2664(as)S
(the)126 2790 A
(parent)252 2958 A
(had.)168 3252 A
3504(If)S
(the)126 3630 A
(child)210 3798 A
(does)168 4050 A
1620 V
(17603)210 648 A
1068(*)S
1152(an)S
(EXEC)168 1278 A
(later,)252 1488 A
(the)126 1782 A
(new)126 1950 A
(size)168 2118 A
2328(is)S
(taken)210 2454 A
(from)168 2706 A
(the)126 2916 A
(header)252 3084 A
3378(of)S
(the)126 3504 A
(file)168 3672 A
(EXEC'ed.)336 3882 A
1710 V
(17604)210 648 A
1068(*)S
1800 V
(17605)210 648 A
1068(*)S
(The)126 1152 A
(layout)252 1320 A
1614(in)S
(memory)252 1740 A
(consists)336 2034 A
2412(of)S
(the)126 2538 A
(text)168 2706 A
(segment,)336 2916 A
(followed)336 3294 A
3672(by)S
(the)126 3798 A
(data)168 3966 A
1890 V
(17606)210 648 A
1068(*)S
(segment,)336 1152 A
(followed)336 1530 A
1908(by)S
2034(a)S
(gap)126 2118 A
((unused)294 2286 A
(memory),)336 2622 A
(followed)336 3000 A
3378(by)S
(the)126 3504 A
(stack)210 3672 A
(segment.)336 3924 A
1980 V
(17607)210 648 A
1068(*)S
(The)126 1152 A
(data)168 1320 A
(segment)294 1530 A
(grows)210 1866 A
(upward)252 2118 A
(and)126 2412 A
(the)126 2580 A
(stack)210 2748 A
(grows)210 3000 A
(downward,)378 3252 A
3672(so)S
(each)168 3798 A
(can)126 4008 A
2070 V
(17608)210 648 A
1068(*)S
(take)168 1152 A
(memory)252 1362 A
(from)168 1656 A
(the)126 1866 A
(gap.)168 2034 A
2286(If)S
(they)168 2412 A
(meet,)210 2622 A
(the)126 2874 A
(process)294 3042 A
(must)168 3378 A
3588(be)S
(killed.)294 3714 A
(The)126 4092 A
2160 V
(17609)210 648 A
1068(*)S
(procedures)420 1152 A
1614(in)S
(this)168 1740 A
(file)168 1950 A
(deal)168 2160 A
(with)168 2370 A
(the)126 2580 A
(growth)252 2748 A
3042(of)S
(the)126 3168 A
(data)168 3336 A
(and)126 3546 A
(stack)210 3714 A
(segments.)378 3966 A
2250 V
(17610)210 648 A
1068(*)S
2340 V
(17611)210 648 A
1068(*)S
(The)126 1152 A
(entry)210 1320 A
(points)252 1572 A
(into)168 1866 A
(this)168 2076 A
(file)168 2286 A
(are:)168 2496 A
2430 V
(17612)210 648 A
1068(*)S
(do_brk:)294 1236 A
(BRK/SBRK)336 1782 A
(system)252 2160 A
(calls)210 2454 A
2706(to)S
(grow)168 2832 A
3042(or)S
(shrink)252 3168 A
(the)126 3462 A
(data)168 3630 A
(segment)294 3840 A
2520 V
(17613)210 648 A
1068(*)S
(adjust:)294 1236 A
(see)126 1782 A
1950(if)S
2076(a)S
(proposed)336 2160 A
(segment)294 2538 A
(adjustment)420 2874 A
3336(is)S
(allowed)294 3462 A
2610 V
(17614)210 648 A
1068(*)S
(size_ok:)336 1236 A
(see)126 1782 A
1950(if)S
(the)126 2076 A
(segment)294 2244 A
(sizes)210 2580 A
(are)126 2832 A
(feasible)336 3000 A
2700 V
(17615)210 648 A
1068(*/)S
2790 V
(17616)210 648 A
2880 V
(17617)210 648 A
(#include)336 1026 A
("mm.h")252 1404 A
2970 V
(17618)210 648 A
(#include)336 1026 A
(<signal.h>)420 1404 A
3060 V
(17619)210 648 A
(#include)336 1026 A
("mproc.h")378 1404 A
3150 V
(17620)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
3240 V
(17621)210 648 A
3330 V
(17622)210 648 A
(#define)294 1026 A
(DATA_CHANGED)504 1362 A
2160(1)S
2370(/*)S
(flag)168 2496 A
(value)210 2706 A
(when)168 2958 A
(data)168 3168 A
(segment)294 3378 A
(size)168 3714 A
(changed)294 3924 A
4260(*/)S
3420 V
(17623)210 648 A
(#define)294 1026 A
(STACK_CHANGED)546 1362 A
2160(2)S
2370(/*)S
(flag)168 2496 A
(value)210 2706 A
(when)168 2958 A
(stack)210 3168 A
(size)168 3420 A
(changed)294 3630 A
3966(*/)S
3510 V
(17624)210 648 A
3600 V
(17625)210 648 A
(/*===========================================================================*)3276 1026 A
3690 V
(17626)210 648 A
1068(*)S
(do_brk)252 2370 A
4260(*)S
3780 V
(17627)210 648 A
(*===========================================================================*/)3276 1068 A
3870 V
(17628)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_brk())336 1488 A
3960 V
(17629)210 648 A
1026({)S
4050 V
(17630)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(brk(addr))378 1656 A
(system)252 2076 A
(call.)210 2370 A
4140 V
(17631)210 648 A
1068(*)S
4230 V
(17632)210 648 A
1068(*)S
(The)126 1152 A
(call)168 1320 A
1530(is)S
(complicated)462 1656 A
2160(by)S
(the)126 2286 A
(fact)168 2454 A
(that)168 2664 A
2874(on)S
(some)168 3000 A
(machines)336 3210 A
((e.g.,)252 3588 A
(8088),)252 3882 A
4320 V
(17633)210 648 A
1068(*)S
(the)126 1152 A
(stack)210 1320 A
(pointer)294 1572 A
(can)126 1908 A
(grow)168 2076 A
(beyond)252 2286 A
(the)126 2580 A
(base)168 2748 A
2958(of)S
(the)126 3084 A
(stack)210 3252 A
(segment)294 3504 A
(without)294 3840 A
4410 V
(17634)210 648 A
1068(*)S
(anybody)294 1152 A
(noticing)336 1488 A
(it.)126 1866 A
4500 V
(17635)210 648 A
1068(*)S
(The)126 1152 A
(parameter,)420 1320 A
('addr')252 1782 A
2076(is)S
(the)126 2202 A
(new)126 2370 A
(virtual)294 2538 A
(address)294 2874 A
3210(in)S
3336(D)S
(space.)252 3420 A
4590 V
(17636)210 648 A
1068(*/)S
4680 V
(17637)210 648 A
4770 V
(17638)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rmp;)210 2034 A
4860 V
(17639)210 648 A
(int)126 1110 A
1278(r;)S
4950 V
(17640)210 648 A
(vir_bytes)378 1110 A
1530(v,)S
(new_sp;)294 1656 A
5040 V
(17641)210 648 A
(vir_clicks)420 1110 A
(new_clicks;)462 1572 A
5130 V
(17642)210 648 A
5220 V
(17643)210 648 A
(rmp)126 1110 A
1278(=)S
(mp;)126 1362 A
5310 V
(17644)210 648 A
1110(v)S
1194(=)S
((vir_bytes))462 1278 A
(addr;)210 1782 A
5400 V
(17645)210 648 A
(new_clicks)420 1110 A
1572(=)S
((vir_clicks))504 1656 A
2202(()S
(((long))294 2286 A
2622(v)S
2706(+)S
(CLICK_SIZE)420 2790 A
3252(-)S
3336(1))S
3462(>>)S
(CLICK_SHIFT);)546 3588 A
5490 V
(17646)210 648 A
1110(if)S
((new_clicks)462 1236 A
1740(<)S
(rmp->mp_seg[D].mem_vir))966 1824 A
2832({)S
5580 V
(17647)210 648 A
(res_ptr)294 1362 A
1698(=)S
((char)210 1782 A
2034(*))S
(-1;)126 2160 A
5670 V
(17648)210 648 A
(return(ENOMEM);)630 1362 A
5760 V
(17649)210 648 A
1110(})S
5850 V
(17650)210 648 A
(new_clicks)420 1110 A
1572(-=)S
(rmp->mp_seg[D].mem_vir;)966 1698 A
5940 V
(17651)210 648 A
(sys_getsp(who,)588 1110 A
(&new_sp);)378 1740 A
2370(/*)S
(ask)126 2496 A
(kernel)252 2664 A
(for)126 2958 A
(current)294 3126 A
3462(sp)S
(value)210 3588 A
3840(*/)S
6030 V
(17652)210 648 A
1110(r)S
1194(=)S
(adjust(rmp,)462 1278 A
(new_clicks,)462 1782 A
(new_sp);)336 2286 A
6120 V
(17653)210 648 A
(res_ptr)294 1110 A
1446(=)S
1530((r)S
1656(==)S
1782(OK)S
1908(?)S
(addr)168 1992 A
2202(:)S
((char)210 2286 A
2538(*))S
(-1);)168 2664 A
6210 V
(17654)210 648 A
(return(r);)420 1110 A
2370(/*)S
(return)252 2496 A
(new)126 2790 A
(address)294 2958 A
3294(or)S
3420(-1)S
3546(*/)S
8418 V
EP
%%Page: 245 245
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/slant 0 def
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2077(File:)S
2310(src/mm/break.c)S
12 B
(245)180 4248 A
900 V
7 LST
(17655)210 648 A
1026(})S
1170 V
(17658)210 648 A
(/*===========================================================================*)3276 1026 A
1260 V
(17659)210 648 A
1068(*)S
(adjust)252 2370 A
4260(*)S
1350 V
(17660)210 648 A
(*===========================================================================*/)3276 1068 A
1440 V
(17661)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(adjust(rmp,)462 1488 A
(data_clicks,)504 1992 A
(sp))126 2538 A
1530 V
(17662)210 648 A
(register)336 1026 A
(struct)252 1404 A
(mproc)210 1698 A
(*rmp;)210 1950 A
2370(/*)S
(whose)210 2496 A
(memory)252 2748 A
3042(is)S
(being)210 3168 A
(adjusted?)378 3420 A
3840(*/)S
1620 V
(17663)210 648 A
(vir_clicks)420 1026 A
(data_clicks;)504 1488 A
2370(/*)S
(how)126 2496 A
(big)126 2664 A
2832(is)S
(data)168 2958 A
(segment)294 3168 A
3504(to)S
(become?)294 3630 A
3966(*/)S
1710 V
(17664)210 648 A
(vir_bytes)378 1026 A
(sp;)126 1446 A
2370(/*)S
(new)126 2496 A
(value)210 2664 A
2916(of)S
3042(sp)S
3168(*/)S
1800 V
(17665)210 648 A
1026({)S
1890 V
(17666)210 648 A
1026(/*)S
(See)126 1152 A
1320(if)S
(data)168 1446 A
(and)126 1656 A
(stack)210 1824 A
(segments)336 2076 A
(can)126 2454 A
(coexist,)336 2622 A
(adjusting)378 3000 A
(them)168 3420 A
3630(if)S
(need)168 3756 A
(be.)126 3966 A
1980 V
(17667)210 648 A
1068(*)S
(Memory)252 1152 A
1446(is)S
(never)210 1572 A
(allocated)378 1824 A
2244(or)S
(freed.)252 2370 A
(Instead)294 2706 A
3042(it)S
3168(is)S
(added)210 3294 A
3546(or)S
(removed)294 3672 A
(from)168 4008 A
(the)126 4218 A
2070 V
(17668)210 648 A
1068(*)S
(gap)126 1152 A
(between)294 1320 A
(data)168 1656 A
(segment)294 1866 A
(and)126 2202 A
(stack)210 2370 A
(segment.)336 2622 A
3042(If)S
(the)126 3168 A
(gap)126 3336 A
(size)168 3504 A
(becomes)294 3714 A
2160 V
(17669)210 648 A
1068(*)S
(negative,)378 1152 A
(the)126 1572 A
(adjustment)420 1740 A
2202(of)S
(data)168 2328 A
2538(or)S
(stack)210 2664 A
(fails)210 2916 A
(and)126 3168 A
(ENOMEM)252 3336 A
3630(is)S
(returned.)378 3756 A
2250 V
(17670)210 648 A
1068(*/)S
2340 V
(17671)210 648 A
2430 V
(17672)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mem_map)294 1782 A
(*mem_sp,)336 2118 A
(*mem_dp;)336 2496 A
2520 V
(17673)210 648 A
(vir_clicks)420 1110 A
(sp_click,)378 1572 A
(gap_base,)378 1992 A
(lower,)252 2412 A
(old_clicks;)462 2706 A
2610 V
(17674)210 648 A
(int)126 1110 A
(changed,)336 1278 A
1656(r,)S
(ft;)126 1782 A
2700 V
(17675)210 648 A
(long)168 1110 A
(base_of_stack,)588 1320 A
(delta;)252 1950 A
2370(/*)S
(longs)210 2496 A
(avoid)210 2748 A
(certain)294 3000 A
(problems)336 3336 A
3714(*/)S
2790 V
(17676)210 648 A
2880 V
(17677)210 648 A
(mem_dp)252 1110 A
1404(=)S
(&rmp->mp_seg[D];)672 1488 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(data)168 2958 A
(segment)294 3168 A
(map)126 3504 A
3672(*/)S
2970 V
(17678)210 648 A
(mem_sp)252 1110 A
1404(=)S
(&rmp->mp_seg[S];)672 1488 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(stack)210 2958 A
(segment)294 3210 A
(map)126 3546 A
3714(*/)S
3060 V
(17679)210 648 A
(changed)294 1110 A
1446(=)S
1530(0;)S
2370(/*)S
(set)126 2496 A
(when)168 2664 A
(either)252 2874 A
(segment)294 3168 A
(changed)294 3504 A
3840(*/)S
3150 V
(17680)210 648 A
3240 V
(17681)210 648 A
1110(if)S
((mem_sp->mem_len)672 1236 A
1950(==)S
2076(0))S
(return(OK);)462 2202 A
2706(/*)S
(don't)210 2832 A
(bother)252 3084 A
(init)168 3378 A
3588(*/)S
3330 V
(17682)210 648 A
3420 V
(17683)210 648 A
1110(/*)S
(See)126 1236 A
1404(if)S
(stack)210 1530 A
(size)168 1782 A
(has)126 1992 A
(gone)168 2160 A
(negative)336 2370 A
((i.e.,)252 2748 A
3042(sp)S
(too)126 3168 A
(close)210 3336 A
3588(to)S
(0xFFFF...))420 3714 A
4176(*/)S
3510 V
(17684)210 648 A
(base_of_stack)546 1110 A
1698(=)S
((long))252 1782 A
(mem_sp->mem_vir)630 2076 A
2748(+)S
((long))252 2832 A
(mem_sp->mem_len;)672 3126 A
3600 V
(17685)210 648 A
(sp_click)336 1110 A
1488(=)S
1572(sp)S
1698(>>)S
(CLICK_SHIFT;)504 1824 A
2370(/*)S
(click)210 2496 A
(containing)420 2748 A
3210(sp)S
3336(*/)S
3690 V
(17686)210 648 A
1110(if)S
((sp_click)378 1236 A
1656(>=)S
(base_of_stack))588 1782 A
(return(ENOMEM);)630 2412 A
3378(/*)S
3504(sp)S
(too)126 3630 A
(high)168 3798 A
4008(*/)S
3780 V
(17687)210 648 A
3870 V
(17688)210 648 A
1110(/*)S
(Compute)294 1236 A
(size)168 1572 A
1782(of)S
(gap)126 1908 A
(between)294 2076 A
(stack)210 2412 A
(and)126 2664 A
(data)168 2832 A
(segments.)378 3042 A
3462(*/)S
3960 V
(17689)210 648 A
(delta)210 1110 A
1362(=)S
((long))252 1446 A
(mem_sp->mem_vir)630 1740 A
2412(-)S
((long))252 2496 A
(sp_click;)378 2790 A
4050 V
(17690)210 648 A
(lower)210 1110 A
1362(=)S
((delta)252 1446 A
1740(>)S
1824(0)S
1908(?)S
(sp_click)336 1992 A
2370(:)S
(mem_sp->mem_vir);)714 2454 A
4140 V
(17691)210 648 A
4230 V
(17692)210 648 A
1110(/*)S
(Add)126 1236 A
1404(a)S
(safety)252 1488 A
(margin)252 1782 A
(for)126 2076 A
(future)252 2244 A
(stack)210 2538 A
(growth.)294 2790 A
(Impossible)420 3126 A
3588(to)S
3714(do)S
(right.)252 3840 A
4134(*/)S
4320 V
(17693)210 648 A
(#define)294 1026 A
(SAFETY_BYTES)504 1362 A
((384)168 1950 A
2160(*)S
(sizeof(char)462 2244 A
(*)))126 2748 A
4410 V
(17694)210 648 A
(#define)294 1026 A
(SAFETY_CLICKS)546 1362 A
(((SAFETY_BYTES)588 1950 A
2580(+)S
(CLICK_SIZE)420 2664 A
3126(-)S
3210(1))S
3336(/)S
(CLICK_SIZE))462 3420 A
4500 V
(17695)210 648 A
(gap_base)336 1110 A
1488(=)S
(mem_dp->mem_vir)630 1572 A
2244(+)S
(data_clicks)462 2328 A
2832(+)S
(SAFETY_CLICKS;)588 2916 A
4590 V
(17696)210 648 A
1110(if)S
((lower)252 1236 A
1530(<)S
(gap_base))378 1614 A
(return(ENOMEM);)630 2034 A
2706(/*)S
(data)168 2832 A
(and)126 3042 A
(stack)210 3210 A
(collided)336 3462 A
3840(*/)S
4680 V
(17697)210 648 A
4770 V
(17698)210 648 A
1110(/*)S
(Update)252 1236 A
(data)168 1530 A
(length)252 1740 A
((but)168 2034 A
(not)126 2244 A
(data)168 2412 A
(orgin))252 2622 A
2916(on)S
(behalf)252 3042 A
3336(of)S
(brk())210 3462 A
(system)252 3714 A
(call.)210 4008 A
4260(*/)S
4860 V
(17699)210 648 A
(old_clicks)420 1110 A
1572(=)S
(mem_dp->mem_len;)672 1656 A
4950 V
(17700)210 648 A
1110(if)S
((data_clicks)504 1236 A
1782(!=)S
(mem_dp->mem_len))672 1908 A
2622({)S
5040 V
(17701)210 648 A
(mem_dp->mem_len)630 1362 A
2034(=)S
(data_clicks;)504 2118 A
5130 V
(17702)210 648 A
(changed)294 1362 A
1698(|=)S
(DATA_CHANGED;)546 1824 A
5220 V
(17703)210 648 A
1110(})S
5310 V
(17704)210 648 A
5400 V
(17705)210 648 A
1110(/*)S
(Update)252 1236 A
(stack)210 1530 A
(length)252 1782 A
(and)126 2076 A
(origin)252 2244 A
(due)126 2538 A
2706(to)S
(change)252 2832 A
3126(in)S
(stack)210 3252 A
(pointer.)336 3504 A
3882(*/)S
5490 V
(17706)210 648 A
1110(if)S
((delta)252 1236 A
1530(>)S
1614(0))S
1740({)S
5580 V
(17707)210 648 A
(mem_sp->mem_vir)630 1362 A
2034(-=)S
(delta;)252 2160 A
5670 V
(17708)210 648 A
(mem_sp->mem_phys)672 1362 A
2076(-=)S
(delta;)252 2202 A
5760 V
(17709)210 648 A
(mem_sp->mem_len)630 1362 A
2034(+=)S
(delta;)252 2160 A
5850 V
(17710)210 648 A
(changed)294 1362 A
1698(|=)S
(STACK_CHANGED;)588 1824 A
5940 V
(17711)210 648 A
1110(})S
6030 V
(17712)210 648 A
6120 V
(17713)210 648 A
1110(/*)S
1236(Do)S
(the)126 1362 A
(new)126 1530 A
(data)168 1698 A
(and)126 1908 A
(stack)210 2076 A
(segment)294 2328 A
(sizes)210 2664 A
(fit)126 2916 A
3084(in)S
(the)126 3210 A
(address)294 3378 A
(space?)252 3714 A
4008(*/)S
6210 V
(17714)210 648 A
1110(ft)S
1236(=)S
((rmp->mp_flags)588 1320 A
1950(&)S
(SEPARATE);)420 2034 A
8418 V
EP
%%Page: 246 246
BP
/slant 0 def
/height 0 def
630 V
12 B
(246)180 648 A
11 R
2077(File:)S
2310(src/mm/break.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(17715)210 648 A
1110(r)S
1194(=)S
(size_ok(ft,)462 1278 A
(rmp->mp_seg[T].mem_len,)966 1782 A
(rmp->mp_seg[D].mem_len,)966 2790 A
990 V
(17716)210 648 A
(rmp->mp_seg[S].mem_len,)966 1320 A
(rmp->mp_seg[D].mem_vir,)966 2328 A
(rmp->mp_seg[S].mem_vir);)1008 3336 A
1080 V
(17717)210 648 A
1110(if)S
1236((r)S
1362(==)S
(OK))126 1488 A
1656({)S
1170 V
(17718)210 648 A
1362(if)S
((changed))378 1488 A
(sys_newmap((int)(rmp)840 1908 A
2790(-)S
(mproc),)294 2874 A
(rmp->mp_seg);)546 3210 A
1260 V
(17719)210 648 A
(return(OK);)462 1362 A
1350 V
(17720)210 648 A
1110(})S
1440 V
(17721)210 648 A
1530 V
(17722)210 648 A
1110(/*)S
(New)126 1236 A
(sizes)210 1404 A
(don't)210 1656 A
(fit)126 1908 A
2076(or)S
(require)294 2202 A
(too)126 2538 A
(many)168 2706 A
(page/segment)504 2916 A
(registers.)420 3462 A
(Restore.*/)420 3924 A
1620 V
(17723)210 648 A
1110(if)S
((changed)336 1236 A
1614(&)S
(DATA_CHANGED))546 1698 A
(mem_dp->mem_len)630 2286 A
2958(=)S
(old_clicks;)462 3042 A
1710 V
(17724)210 648 A
1110(if)S
((changed)336 1236 A
1614(&)S
(STACK_CHANGED))588 1698 A
2328({)S
1800 V
(17725)210 648 A
(mem_sp->mem_vir)630 1362 A
2034(+=)S
(delta;)252 2160 A
1890 V
(17726)210 648 A
(mem_sp->mem_phys)672 1362 A
2076(+=)S
(delta;)252 2202 A
1980 V
(17727)210 648 A
(mem_sp->mem_len)630 1362 A
2034(-=)S
(delta;)252 2160 A
2070 V
(17728)210 648 A
1110(})S
2160 V
(17729)210 648 A
(return(ENOMEM);)630 1110 A
2250 V
(17730)210 648 A
1026(})S
2520 V
(17733)210 648 A
(/*===========================================================================*)3276 1026 A
2610 V
(17734)210 648 A
1068(*)S
(size_ok)294 2370 A
4260(*)S
2700 V
(17735)210 648 A
(*===========================================================================*/)3276 1068 A
2790 V
(17736)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(size_ok(file_type,)756 1488 A
(tc,)126 2286 A
(dc,)126 2454 A
(sc,)126 2622 A
(dvir,)210 2790 A
(s_vir))252 3042 A
2880 V
(17737)210 648 A
(int)126 1026 A
(file_type;)420 1194 A
2370(/*)S
(SEPARATE)336 2496 A
2874(or)S
3000(0)S
3084(*/)S
2970 V
(17738)210 648 A
(vir_clicks)420 1026 A
(tc;)126 1488 A
2370(/*)S
(text)168 2496 A
(size)168 2706 A
2916(in)S
(clicks)252 3042 A
3336(*/)S
3060 V
(17739)210 648 A
(vir_clicks)420 1026 A
(dc;)126 1488 A
2370(/*)S
(data)168 2496 A
(size)168 2706 A
2916(in)S
(clicks)252 3042 A
3336(*/)S
3150 V
(17740)210 648 A
(vir_clicks)420 1026 A
(sc;)126 1488 A
2370(/*)S
(stack)210 2496 A
(size)168 2748 A
2958(in)S
(clicks)252 3084 A
3378(*/)S
3240 V
(17741)210 648 A
(vir_clicks)420 1026 A
(dvir;)210 1488 A
2370(/*)S
(virtual)294 2496 A
(address)294 2832 A
(for)126 3168 A
(start)210 3336 A
3588(of)S
(data)168 3714 A
(seg)126 3924 A
4092(*/)S
3330 V
(17742)210 648 A
(vir_clicks)420 1026 A
(s_vir;)252 1488 A
2370(/*)S
(virtual)294 2496 A
(address)294 2832 A
(for)126 3168 A
(start)210 3336 A
3588(of)S
(stack)210 3714 A
(seg)126 3966 A
4134(*/)S
3420 V
(17743)210 648 A
1026({)S
3510 V
(17744)210 648 A
1026(/*)S
(Check)210 1152 A
1404(to)S
(see)126 1530 A
1698(if)S
(the)126 1824 A
(sizes)210 1992 A
(are)126 2244 A
(feasible)336 2412 A
(and)126 2790 A
(enough)252 2958 A
(segmentation)504 3252 A
(registers)378 3798 A
3600 V
(17745)210 648 A
1068(*)S
(exist.)252 1152 A
1488(On)S
1614(a)S
(machine)294 1698 A
(with)168 2034 A
(eight)210 2244 A
2496(8K)S
(pages,)252 2622 A
(text,)210 2916 A
(data,)210 3168 A
(stack)210 3420 A
(sizes)210 3672 A
3924(of)S
3690 V
(17746)210 648 A
1068(*)S
((32K,)210 1152 A
(16K,)168 1404 A
(16K))168 1614 A
(will)168 1824 A
(fit,)168 2034 A
(but)126 2244 A
((33K,)210 2412 A
(17K,)168 2664 A
(13K))168 2874 A
(will)168 3084 A
(not,)168 3294 A
(even)168 3504 A
(though)252 3714 A
(the)126 4008 A
3780 V
(17747)210 648 A
1068(*)S
(former)252 1152 A
1446(is)S
(bigger)252 1572 A
((64K))210 1866 A
(than)168 2118 A
(the)126 2328 A
(latter)252 2496 A
((63K).)252 2790 A
(Even)168 3126 A
3336(on)S
(the)126 3462 A
(8088)168 3630 A
(this)168 3840 A
(test)168 4050 A
3870 V
(17748)210 648 A
1068(*)S
1152(is)S
(needed,)294 1278 A
(since)210 1614 A
(the)126 1866 A
(data)168 2034 A
(and)126 2244 A
(stack)210 2412 A
(may)126 2664 A
(not)126 2832 A
(exceed)252 3000 A
(4096)168 3294 A
(clicks.)294 3504 A
3960 V
(17749)210 648 A
1068(*/)S
4050 V
(17750)210 648 A
4140 V
(17751)210 648 A
(#if)126 1026 A
((CHIP)210 1194 A
1446(==)S
(INTEL)210 1572 A
1824(&&)S
(_WORD_SIZE)420 1950 A
2412(==)S
2538(2))S
4230 V
(17752)210 648 A
(int)126 1110 A
(pt,)126 1278 A
(pd,)126 1446 A
(ps;)126 1614 A
2370(/*)S
(segment)294 2496 A
(sizes)210 2832 A
3084(in)S
(pages)210 3210 A
3462(*/)S
4320 V
(17753)210 648 A
4410 V
(17754)210 648 A
1110(pt)S
1236(=)S
1320(()S
((tc)126 1404 A
1572(<<)S
(CLICK_SHIFT))504 1698 A
2244(+)S
(PAGE_SIZE)378 2328 A
2748(-)S
(1)/PAGE_SIZE;)546 2832 A
4500 V
(17755)210 648 A
1110(pd)S
1236(=)S
1320(()S
((dc)126 1404 A
1572(<<)S
(CLICK_SHIFT))504 1698 A
2244(+)S
(PAGE_SIZE)378 2328 A
2748(-)S
(1)/PAGE_SIZE;)546 2832 A
4590 V
(17756)210 648 A
1110(ps)S
1236(=)S
1320(()S
((sc)126 1404 A
1572(<<)S
(CLICK_SHIFT))504 1698 A
2244(+)S
(PAGE_SIZE)378 2328 A
2748(-)S
(1)/PAGE_SIZE;)546 2832 A
4680 V
(17757)210 648 A
4770 V
(17758)210 648 A
1110(if)S
((file_type)420 1236 A
1698(==)S
(SEPARATE))378 1824 A
2244({)S
4860 V
(17759)210 648 A
1362(if)S
((pt)126 1488 A
1656(>)S
(MAX_PAGES)378 1740 A
2160(||)S
2286(pd)S
2412(+)S
2496(ps)S
2622(>)S
(MAX_PAGES))420 2706 A
(return(ENOMEM);)630 3168 A
4950 V
(17760)210 648 A
1110(})S
(else)168 1194 A
1404({)S
5040 V
(17761)210 648 A
1362(if)S
((pt)126 1488 A
1656(+)S
1740(pd)S
1866(+)S
1950(ps)S
2076(>)S
(MAX_PAGES))420 2160 A
(return(ENOMEM);)630 2622 A
5130 V
(17762)210 648 A
1110(})S
5220 V
(17763)210 648 A
(#endif)252 1026 A
5310 V
(17764)210 648 A
5400 V
(17765)210 648 A
1110(if)S
((dvir)210 1236 A
1488(+)S
1572(dc)S
1698(>)S
(s_vir))252 1782 A
(return(ENOMEM);)630 2076 A
5490 V
(17766)210 648 A
5580 V
(17767)210 648 A
(return(OK);)462 1110 A
5670 V
(17768)210 648 A
1026(})S
8418 V
EP
%%Page: 247 247
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2068(File:)S
2301(src/mm/signal.c)S
12 B
(247)180 4248 A
990 V
7 LST
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1080 V
(src/mm/signal.c)630 2034 A
1170 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
1350 V
(17800)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(handles)294 1572 A
(signals,)336 1908 A
(which)210 2286 A
(are)126 2538 A
(asynchronous)504 2706 A
(events)252 3252 A
(and)126 3546 A
(are)126 3714 A
(generally)378 3882 A
1440 V
(17801)210 648 A
1068(*)S
1152(a)S
(messy)210 1236 A
(and)126 1488 A
(unpleasant)420 1656 A
(business.)378 2118 A
(Signals)294 2580 A
(can)126 2916 A
3084(be)S
(generated)378 3210 A
3630(by)S
(the)126 3756 A
(KILL)168 3924 A
1530 V
(17802)210 648 A
1068(*)S
(system)252 1152 A
(call,)210 1446 A
1698(or)S
(from)168 1824 A
(the)126 2034 A
(keyboard)336 2202 A
((SIGINT))336 2580 A
2958(or)S
(from)168 3084 A
(the)126 3294 A
(clock)210 3462 A
((SIGALRM).)420 3714 A
1620 V
(17803)210 648 A
1068(*)S
1152(In)S
(all)126 1278 A
(cases)210 1446 A
(control)294 1698 A
(eventually)420 2034 A
(passes)252 2496 A
2790(to)S
(check_sig())462 2916 A
3420(to)S
(see)126 3546 A
(which)210 3714 A
(processes)378 3966 A
1710 V
(17804)210 648 A
1068(*)S
(can)126 1152 A
1320(be)S
(signaled.)378 1446 A
(The)126 1908 A
(actual)252 2076 A
(signaling)378 2370 A
2790(is)S
(done)168 2916 A
3126(by)S
(sig_proc().)462 3252 A
1800 V
(17805)210 648 A
1068(*)S
1890 V
(17806)210 648 A
1068(*)S
(The)126 1152 A
(entry)210 1320 A
(points)252 1572 A
(into)168 1866 A
(this)168 2076 A
(file)168 2286 A
(are:)168 2496 A
1980 V
(17807)210 648 A
1068(*)S
(do_sigaction:)546 1236 A
(perform)294 1908 A
(the)126 2244 A
(SIGACTION)378 2412 A
(system)252 2832 A
(call)168 3126 A
2070 V
(17808)210 648 A
1068(*)S
(do_sigpending:)588 1236 A
(perform)294 1908 A
(the)126 2244 A
(SIGPENDING)420 2412 A
(system)252 2874 A
(call)168 3168 A
2160 V
(17809)210 648 A
1068(*)S
(do_sigprocmask:)630 1236 A
(perform)294 1908 A
(the)126 2244 A
(SIGPROCMASK)462 2412 A
(system)252 2916 A
(call)168 3210 A
2250 V
(17810)210 648 A
1068(*)S
(do_sigreturn:)546 1236 A
(perform)294 1908 A
(the)126 2244 A
(SIGRETURN)378 2412 A
(system)252 2832 A
(call)168 3126 A
2340 V
(17811)210 648 A
1068(*)S
(do_sigsuspend:)588 1236 A
(perform)294 1908 A
(the)126 2244 A
(SIGSUSPEND)420 2412 A
(system)252 2874 A
(call)168 3168 A
2430 V
(17812)210 648 A
1068(*)S
(do_kill:)336 1236 A
(perform)294 1698 A
(the)126 2034 A
(KILL)168 2202 A
(system)252 2412 A
(call)168 2706 A
2520 V
(17813)210 648 A
1068(*)S
(do_ksig:)336 1236 A
(accept)252 1698 A
1992(a)S
(signal)252 2076 A
(originating)462 2370 A
2874(in)S
(the)126 3000 A
(kernel)252 3168 A
((e.g.,)252 3462 A
(SIGINT))294 3756 A
2610 V
(17814)210 648 A
1068(*)S
(do_alarm:)378 1236 A
(perform)294 1698 A
(the)126 2034 A
(ALARM)210 2202 A
(system)252 2454 A
(call)168 2748 A
2958(by)S
(calling)294 3084 A
(set_alarm())462 3420 A
2700 V
(17815)210 648 A
1068(*)S
(set_alarm:)420 1236 A
(tell)168 1698 A
(the)126 1908 A
(clock)210 2076 A
(task)168 2328 A
2538(to)S
(start)210 2664 A
2916(or)S
(stop)168 3042 A
3252(a)S
(timer)210 3336 A
2790 V
(17816)210 648 A
1068(*)S
(do_pause:)378 1236 A
(perform)294 1698 A
(the)126 2034 A
(PAUSE)210 2202 A
(system)252 2454 A
(call)168 2748 A
2880 V
(17817)210 648 A
1068(*)S
(do_reboot:)420 1236 A
(kill)168 1698 A
(all)126 1908 A
(processes,)420 2076 A
(then)168 2538 A
(reboot)252 2748 A
(system)252 3042 A
2970 V
(17818)210 648 A
1068(*)S
(sig_proc:)378 1236 A
(interrupt)378 1698 A
2118(or)S
(terminate)378 2244 A
2664(a)S
(signaled)336 2748 A
(process)294 3126 A
3060 V
(17819)210 648 A
1068(*)S
(check_sig:)420 1236 A
(check)210 1698 A
(which)210 1950 A
(processes)378 2202 A
2622(to)S
(signal)252 2748 A
(with)168 3042 A
(sig_proc())420 3252 A
3150 V
(17820)210 648 A
1068(*/)S
3240 V
(17821)210 648 A
3330 V
(17822)210 648 A
(#include)336 1026 A
("mm.h")252 1404 A
3420 V
(17823)210 648 A
(#include)336 1026 A
(<sys/stat.h>)504 1404 A
3510 V
(17824)210 648 A
(#include)336 1026 A
(<minix/callnr.h>)672 1404 A
3600 V
(17825)210 648 A
(#include)336 1026 A
(<minix/com.h>)546 1404 A
3690 V
(17826)210 648 A
(#include)336 1026 A
(<signal.h>)420 1404 A
3780 V
(17827)210 648 A
(#include)336 1026 A
(<sys/sigcontext.h>)756 1404 A
3870 V
(17828)210 648 A
(#include)336 1026 A
(<string.h>)420 1404 A
3960 V
(17829)210 648 A
(#include)336 1026 A
("mproc.h")378 1404 A
4050 V
(17830)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
4140 V
(17831)210 648 A
4230 V
(17832)210 648 A
(#define)294 1026 A
(CORE_MODE)378 1362 A
(0777)168 2034 A
2370(/*)S
(mode)168 2496 A
2706(to)S
(use)126 2832 A
3000(on)S
(core)168 3126 A
(image)210 3336 A
(files)210 3588 A
3840(*/)S
4320 V
(17833)210 648 A
(#define)294 1026 A
(DUMPED)252 1362 A
(0200)168 2034 A
2370(/*)S
(bit)126 2496 A
(set)126 2664 A
2832(in)S
(status)252 2958 A
(when)168 3252 A
(core)168 3462 A
(dumped)252 3672 A
3966(*/)S
4410 V
(17834)210 648 A
(#define)294 1026 A
(DUMP_SIZE)378 1362 A
(((INT_MAX)378 2034 A
2454(/)S
(BLOCK_SIZE))462 2538 A
3042(*)S
(BLOCK_SIZE))462 3126 A
4500 V
(17835)210 648 A
2370(/*)S
(buffer)252 2496 A
(size)168 2790 A
(for)126 3000 A
(core)168 3168 A
(dumps)210 3378 A
3630(*/)S
4590 V
(17836)210 648 A
4680 V
(17837)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(check_pending,)588 2076 A
((void))252 2706 A
4050();)S
4770 V
(17838)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(dump_core,)420 2076 A
((struct)294 2538 A
(mproc)210 2874 A
(*rmp))210 3126 A
4050();)S
4860 V
(17839)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(unpause,)336 2076 A
((int)168 2454 A
(pro))168 2664 A
4050();)S
4950 V
(17840)210 648 A
5040 V
(17841)210 648 A
5130 V
(17842)210 648 A
(/*===========================================================================*)3276 1026 A
5220 V
(17843)210 648 A
1068(*)S
(do_sigaction)504 2328 A
4260(*)S
5310 V
(17844)210 648 A
(*===========================================================================*/)3276 1068 A
5400 V
(17845)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_sigaction())588 1488 A
5490 V
(17846)210 648 A
1026({)S
5580 V
(17847)210 648 A
(int)126 1110 A
1278(r;)S
5670 V
(17848)210 648 A
(struct)252 1110 A
(sigaction)378 1404 A
(svec;)210 1824 A
5760 V
(17849)210 648 A
(struct)252 1110 A
(sigaction)378 1404 A
(*svp;)210 1824 A
5850 V
(17850)210 648 A
5940 V
(17851)210 648 A
1110(if)S
((sig_nr)294 1236 A
1572(==)S
(SIGKILL))336 1698 A
(return(OK);)462 2076 A
6030 V
(17852)210 648 A
1110(if)S
((sig_nr)294 1236 A
1572(<)S
1656(1)S
1740(||)S
(sig_nr)252 1866 A
2160(>)S
(_NSIG))252 2244 A
(return)252 2538 A
((EINVAL);)378 2832 A
6120 V
(17853)210 648 A
(svp)126 1110 A
1278(=)S
(&mp->mp_sigact[sig_nr];)966 1362 A
6210 V
(17854)210 648 A
1110(if)S
(((struct)336 1236 A
(sigaction)378 1614 A
2034(*))S
(sig_osa)294 2160 A
2496(!=)S
((struct)294 2622 A
(sigaction)378 2958 A
3378(*))S
(NULL))210 3504 A
3756({)S
8418 V
EP
%%Page: 248 248
BP
/slant 0 def
/height 0 def
630 V
12 B
(248)180 648 A
11 R
2068(File:)S
2301(src/mm/signal.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(17855)210 648 A
1362(r)S
1446(=)S
(sys_copy(MM_PROC_NR,D,)924 1530 A
((phys_bytes))504 2496 A
(svp,)168 3042 A
990 V
(17856)210 648 A
(who,)168 1698 A
1908(D,)S
((phys_bytes))504 2034 A
(sig_osa,)336 2580 A
((phys_bytes))504 2958 A
(sizeof(svec));)588 3504 A
1080 V
(17857)210 648 A
1362(if)S
1488((r)S
1614(!=)S
(OK))126 1740 A
(return(r);)420 1908 A
1170 V
(17858)210 648 A
1110(})S
1260 V
(17859)210 648 A
1350 V
(17860)210 648 A
1110(if)S
(((struct)336 1236 A
(sigaction)378 1614 A
2034(*))S
(sig_nsa)294 2160 A
2496(==)S
((struct)294 2622 A
(sigaction)378 2958 A
3378(*))S
(NULL))210 3504 A
(return(OK);)462 3756 A
1440 V
(17861)210 648 A
1530 V
(17862)210 648 A
1110(/*)S
(Read)168 1236 A
1446(in)S
(the)126 1572 A
(sigaction)378 1740 A
(structure.)420 2160 A
2622(*/)S
1620 V
(17863)210 648 A
1110(r)S
1194(=)S
(sys_copy(who,)546 1278 A
1866(D,)S
((phys_bytes))504 1992 A
(sig_nsa,)336 2538 A
1710 V
(17864)210 648 A
(MM_PROC_NR,)462 1698 A
2202(D,)S
((phys_bytes))504 2328 A
(&svec,)252 2874 A
((phys_bytes))504 3168 A
(sizeof(svec));)588 3714 A
1800 V
(17865)210 648 A
1110(if)S
1236((r)S
1362(!=)S
(OK))126 1488 A
(return(r);)420 1656 A
1890 V
(17866)210 648 A
1980 V
(17867)210 648 A
1110(if)S
((svec.sa_handler)672 1236 A
1950(==)S
(SIG_IGN))336 2076 A
2454({)S
2070 V
(17868)210 648 A
(sigaddset(&mp->mp_ignore,)1050 1362 A
(sig_nr);)336 2454 A
2160 V
(17869)210 648 A
(sigdelset(&mp->mp_sigpending,)1218 1362 A
(sig_nr);)336 2622 A
2250 V
(17870)210 648 A
(sigdelset(&mp->mp_catch,)1008 1362 A
(sig_nr);)336 2412 A
2340 V
(17871)210 648 A
1110(})S
(else)168 1194 A
1404({)S
2430 V
(17872)210 648 A
(sigdelset(&mp->mp_ignore,)1050 1362 A
(sig_nr);)336 2454 A
2520 V
(17873)210 648 A
1362(if)S
((svec.sa_handler)672 1488 A
2202(==)S
(SIG_DFL))336 2328 A
2610 V
(17874)210 648 A
(sigdelset(&mp->mp_catch,)1008 1698 A
(sig_nr);)336 2748 A
2700 V
(17875)210 648 A
(else)168 1362 A
2790 V
(17876)210 648 A
(sigaddset(&mp->mp_catch,)1008 1698 A
(sig_nr);)336 2748 A
2880 V
(17877)210 648 A
1110(})S
2970 V
(17878)210 648 A
(mp->mp_sigact[sig_nr].sa_handler)1344 1110 A
2496(=)S
(svec.sa_handler;)672 2580 A
3060 V
(17879)210 648 A
(sigdelset(&svec.sa_mask,)1008 1110 A
(SIGKILL);)378 2160 A
3150 V
(17880)210 648 A
(mp->mp_sigact[sig_nr].sa_mask)1218 1110 A
2370(=)S
(svec.sa_mask;)546 2454 A
3240 V
(17881)210 648 A
(mp->mp_sigact[sig_nr].sa_flags)1260 1110 A
2412(=)S
(svec.sa_flags;)588 2496 A
3330 V
(17882)210 648 A
(mp->mp_sigreturn)672 1110 A
1824(=)S
((vir_bytes))462 1908 A
(sig_ret;)336 2412 A
3420 V
(17883)210 648 A
(return(OK);)462 1110 A
3510 V
(17884)210 648 A
1026(})S
3690 V
(17886)210 648 A
(/*===========================================================================*)3276 1026 A
3780 V
(17887)210 648 A
1068(*)S
(do_sigpending)546 2286 A
4260(*)S
3870 V
(17888)210 648 A
(*===========================================================================*/)3276 1068 A
3960 V
(17889)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_sigpending())630 1488 A
4050 V
(17890)210 648 A
1026({)S
4140 V
(17891)210 648 A
(ret_mask)336 1110 A
1488(=)S
((long))252 1572 A
(mp->mp_sigpending;)756 1866 A
4230 V
(17892)210 648 A
(return)252 1110 A
(OK;)126 1404 A
4320 V
(17893)210 648 A
1026(})S
4500 V
(17895)210 648 A
(/*===========================================================================*)3276 1026 A
4590 V
(17896)210 648 A
1068(*)S
(do_sigprocmask)588 2286 A
4260(*)S
4680 V
(17897)210 648 A
(*===========================================================================*/)3276 1068 A
4770 V
(17898)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_sigprocmask())672 1488 A
4860 V
(17899)210 648 A
1026({)S
4950 V
(17900)210 648 A
1026(/*)S
(Note)168 1152 A
(that)168 1362 A
(the)126 1572 A
(library)294 1740 A
(interface)378 2076 A
(passes)252 2496 A
(the)126 2790 A
(actual)252 2958 A
(mask)168 3252 A
3462(in)S
(sigmask_set,)504 3588 A
5040 V
(17901)210 648 A
1068(*)S
(not)126 1152 A
1320(a)S
(pointer)294 1404 A
1740(to)S
(the)126 1866 A
(mask,)210 2034 A
2286(in)S
(order)210 2412 A
2664(to)S
(save)168 2790 A
3000(a)S
(sys_copy.)378 3084 A
(Similarly,)420 3546 A
5130 V
(17902)210 648 A
1068(*)S
(the)126 1152 A
(old)126 1320 A
(mask)168 1488 A
1698(is)S
(placed)252 1824 A
2118(in)S
(the)126 2244 A
(return)252 2412 A
(message)294 2706 A
(which)210 3042 A
(the)126 3294 A
(library)294 3462 A
5220 V
(17903)210 648 A
1068(*)S
(interface)378 1152 A
(copies)252 1572 A
((if)126 1866 A
(requested))420 2034 A
2496(to)S
(the)126 2622 A
(user)168 2790 A
(specified)378 3000 A
(address.)336 3420 A
5310 V
(17904)210 648 A
1068(*)S
5400 V
(17905)210 648 A
1068(*)S
(The)126 1152 A
(library)294 1320 A
(interface)378 1656 A
(must)168 2076 A
(set)126 2286 A
(SIG_INQUIRE)462 2454 A
2958(if)S
(the)126 3084 A
('act')210 3252 A
(argument)336 3504 A
5490 V
(17906)210 648 A
1068(*)S
1152(is)S
(NULL.)210 1278 A
5580 V
(17907)210 648 A
1068(*/)S
5670 V
(17908)210 648 A
5760 V
(17909)210 648 A
(int)126 1110 A
1278(i;)S
5850 V
(17910)210 648 A
5940 V
(17911)210 648 A
(ret_mask)336 1110 A
1488(=)S
((long))252 1572 A
(mp->mp_sigmask;)630 1866 A
6030 V
(17912)210 648 A
6120 V
(17913)210 648 A
(switch)252 1110 A
((sig_how))378 1404 A
1824({)S
6210 V
(17914)210 648 A
(case)168 1278 A
(SIG_BLOCK:)420 1488 A
8418 V
EP
%%Page: 249 249
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2068(File:)S
2301(src/mm/signal.c)S
12 B
(249)180 4248 A
900 V
7 LST
(17915)210 648 A
(sigdelset((sigset_t)798 1362 A
(*)&sig_set,)462 2202 A
(SIGKILL);)378 2706 A
990 V
(17916)210 648 A
(for)126 1362 A
1530((i)S
1656(=)S
1740(1;)S
1866(i)S
1950(<)S
(_NSIG;)252 2034 A
(i++))168 2328 A
2538({)S
1080 V
(17917)210 648 A
1698(if)S
((sigismember((sigset_t)924 1824 A
(*)&sig_set,)462 2790 A
(i)))126 3294 A
1170 V
(17918)210 648 A
(sigaddset(&mp->mp_sigmask,)1092 2034 A
(i);)126 3168 A
1260 V
(17919)210 648 A
1362(})S
1350 V
(17920)210 648 A
(break;)252 1362 A
1440 V
(17921)210 648 A
1530 V
(17922)210 648 A
(case)168 1278 A
(SIG_UNBLOCK:)504 1488 A
1620 V
(17923)210 648 A
(for)126 1362 A
1530((i)S
1656(=)S
1740(1;)S
1866(i)S
1950(<)S
(_NSIG;)252 2034 A
(i++))168 2328 A
2538({)S
1710 V
(17924)210 648 A
1698(if)S
((sigismember((sigset_t)924 1824 A
(*)&sig_set,)462 2790 A
(i)))126 3294 A
1800 V
(17925)210 648 A
(sigdelset(&mp->mp_sigmask,)1092 2034 A
(i);)126 3168 A
1890 V
(17926)210 648 A
1362(})S
1980 V
(17927)210 648 A
(check_pending();)672 1362 A
2070 V
(17928)210 648 A
(break;)252 1362 A
2160 V
(17929)210 648 A
2250 V
(17930)210 648 A
(case)168 1278 A
(SIG_SETMASK:)504 1488 A
2340 V
(17931)210 648 A
(sigdelset((sigset_t)798 1362 A
(*)&sig_set,)462 2202 A
(SIGKILL);)378 2706 A
2430 V
(17932)210 648 A
(mp->mp_sigmask)588 1362 A
1992(=)S
((sigset_t)sig_set;)756 2076 A
2520 V
(17933)210 648 A
(check_pending();)672 1362 A
2610 V
(17934)210 648 A
(break;)252 1362 A
2700 V
(17935)210 648 A
2790 V
(17936)210 648 A
(case)168 1278 A
(SIG_INQUIRE:)504 1488 A
2880 V
(17937)210 648 A
(break;)252 1362 A
2970 V
(17938)210 648 A
3060 V
(17939)210 648 A
(default:)336 1278 A
3150 V
(17940)210 648 A
(return(EINVAL);)630 1362 A
3240 V
(17941)210 648 A
(break;)252 1362 A
3330 V
(17942)210 648 A
1110(})S
3420 V
(17943)210 648 A
(return)252 1110 A
(OK;)126 1404 A
3510 V
(17944)210 648 A
1026(})S
3690 V
(17946)210 648 A
(/*===========================================================================*)3276 1026 A
3780 V
(17947)210 648 A
1068(*)S
(do_sigsuspend)546 2286 A
4260(*)S
3870 V
(17948)210 648 A
(*===========================================================================*/)3276 1068 A
3960 V
(17949)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_sigsuspend())630 1488 A
4050 V
(17950)210 648 A
1026({)S
4140 V
(17951)210 648 A
(mp->mp_sigmask2)630 1110 A
1782(=)S
(mp->mp_sigmask;)630 1866 A
2706(/*)S
(save)168 2832 A
(the)126 3042 A
(old)126 3210 A
(mask)168 3378 A
3588(*/)S
4230 V
(17952)210 648 A
(mp->mp_sigmask)588 1110 A
1740(=)S
((sigset_t))420 1824 A
(sig_set;)336 2286 A
4320 V
(17953)210 648 A
(sigdelset(&mp->mp_sigmask,)1092 1110 A
(SIGKILL);)378 2244 A
4410 V
(17954)210 648 A
(mp->mp_flags)504 1110 A
1656(|=)S
(SIGSUSPENDED;)546 1782 A
4500 V
(17955)210 648 A
(dont_reply)420 1110 A
1572(=)S
(TRUE;)210 1656 A
4590 V
(17956)210 648 A
(check_pending();)672 1110 A
4680 V
(17957)210 648 A
(return)252 1110 A
(OK;)126 1404 A
4770 V
(17958)210 648 A
1026(})S
5040 V
(17961)210 648 A
(/*===========================================================================*)3276 1026 A
5130 V
(17962)210 648 A
1068(*)S
(do_sigreturn)504 2412 A
4260(*)S
5220 V
(17963)210 648 A
(*===========================================================================*/)3276 1068 A
5310 V
(17964)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_sigreturn())588 1488 A
5400 V
(17965)210 648 A
1026({)S
5490 V
(17966)210 648 A
1026(/*)S
1152(A)S
(user)168 1236 A
(signal)252 1446 A
(handler)294 1740 A
2076(is)S
(done.)210 2202 A
(Restore)294 2496 A
(context)294 2832 A
(and)126 3168 A
(check)210 3336 A
(for)126 3588 A
5580 V
(17967)210 648 A
1068(*)S
(pending)294 1152 A
(unblocked)378 1488 A
(signals.)336 1908 A
5670 V
(17968)210 648 A
1068(*/)S
5760 V
(17969)210 648 A
5850 V
(17970)210 648 A
(int)126 1110 A
1278(r;)S
5940 V
(17971)210 648 A
6030 V
(17972)210 648 A
(mp->mp_sigmask)588 1110 A
1740(=)S
((sigset_t))420 1824 A
(sig_set;)336 2286 A
6120 V
(17973)210 648 A
(sigdelset(&mp->mp_sigmask,)1092 1110 A
(SIGKILL);)378 2244 A
6210 V
(17974)210 648 A
8418 V
EP
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/slant 0 def
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630 V
12 B
(250)180 648 A
11 R
2068(File:)S
2301(src/mm/signal.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(17975)210 648 A
1110(r)S
1194(=)S
(sys_sigreturn(who,)756 1278 A
((vir_bytes)sig_context,)966 2076 A
(sig_flags);)462 3084 A
990 V
(17976)210 648 A
(check_pending();)672 1110 A
1080 V
(17977)210 648 A
(return(r);)420 1110 A
1170 V
(17978)210 648 A
1026(})S
1350 V
(17980)210 648 A
(/*===========================================================================*)3276 1026 A
1440 V
(17981)210 648 A
1068(*)S
(do_kill)294 2370 A
4260(*)S
1530 V
(17982)210 648 A
(*===========================================================================*/)3276 1068 A
1620 V
(17983)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_kill())378 1488 A
1710 V
(17984)210 648 A
1026({)S
1800 V
(17985)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(kill(pid,)378 1656 A
(signo))252 2076 A
(system)252 2370 A
(call.)210 2664 A
2916(*/)S
1890 V
(17986)210 648 A
1980 V
(17987)210 648 A
(return)252 1110 A
(check_sig(pid,)588 1404 A
(sig_nr);)336 2034 A
2070 V
(17988)210 648 A
1026(})S
2340 V
(17991)210 648 A
(/*===========================================================================*)3276 1026 A
2430 V
(17992)210 648 A
1068(*)S
(do_ksig)294 2370 A
4260(*)S
2520 V
(17993)210 648 A
(*===========================================================================*/)3276 1068 A
2610 V
(17994)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_ksig())378 1488 A
2700 V
(17995)210 648 A
1026({)S
2790 V
(17996)210 648 A
1026(/*)S
(Certain)294 1152 A
(signals,)336 1488 A
(such)168 1866 A
2076(as)S
(segmentation)504 2202 A
(violations)420 2748 A
(and)126 3210 A
(DEL,)168 3378 A
(originate)378 3588 A
4008(in)S
(the)126 4134 A
2880 V
(17997)210 648 A
1068(*)S
(kernel.)294 1152 A
(When)168 1530 A
(the)126 1740 A
(kernel)252 1908 A
(detects)294 2202 A
(such)168 2538 A
(signals,)336 2748 A
3126(it)S
(sets)168 3252 A
(bits)168 3462 A
3672(in)S
3798(a)S
(bit)126 3882 A
(map.)168 4050 A
2970 V
(17998)210 648 A
1068(*)S
1152(As)S
(soon)168 1278 A
1488(as)S
1614(MM)S
1740(is)S
(awaiting)336 1866 A
(new)126 2244 A
(work,)210 2412 A
(the)126 2664 A
(kernel)252 2832 A
(sends)210 3126 A
3378(MM)S
3504(a)S
(message)294 3588 A
(containing)420 3924 A
3060 V
(17999)210 648 A
1068(*)S
(the)126 1152 A
(process)294 1320 A
(slot)168 1656 A
(and)126 1866 A
(bit)126 2034 A
(map.)168 2202 A
(That)168 2454 A
(message)294 2664 A
(comes)210 3000 A
(here.)210 3252 A
(The)126 3546 A
(File)168 3714 A
(System)252 3924 A
3150 V
(18000)210 648 A
1068(*)S
(also)168 1152 A
(uses)168 1362 A
(this)168 1572 A
(mechanism)378 1782 A
2202(to)S
(signal)252 2328 A
(writing)294 2622 A
2958(on)S
(broken)252 3084 A
(pipes)210 3378 A
((SIGPIPE).)420 3630 A
3240 V
(18001)210 648 A
1068(*/)S
3330 V
(18002)210 648 A
3420 V
(18003)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rmp;)210 2034 A
3510 V
(18004)210 648 A
(int)126 1110 A
1278(i,)S
(proc_nr;)336 1404 A
3600 V
(18005)210 648 A
(pid_t)210 1110 A
(proc_id,)336 1362 A
(id;)126 1740 A
3690 V
(18006)210 648 A
(sigset_t)336 1110 A
(sig_map;)336 1488 A
3780 V
(18007)210 648 A
3870 V
(18008)210 648 A
1110(/*)S
(Only)168 1236 A
(kernel)252 1446 A
(may)126 1740 A
(make)168 1908 A
(this)168 2118 A
(call.)210 2328 A
2580(*/)S
3960 V
(18009)210 648 A
1110(if)S
((who)168 1236 A
1446(!=)S
(HARDWARE))378 1572 A
(return(EPERM);)588 1992 A
4050 V
(18010)210 648 A
(dont_reply)420 1110 A
1572(=)S
(TRUE;)210 1656 A
2370(/*)S
(don't)210 2496 A
(reply)210 2748 A
3000(to)S
(the)126 3126 A
(kernel)252 3294 A
3588(*/)S
4140 V
(18011)210 648 A
(proc_nr)294 1110 A
1446(=)S
(mm_in.SIG_PROC;)630 1530 A
4230 V
(18012)210 648 A
(rmp)126 1110 A
1278(=)S
(&mproc[proc_nr];)672 1362 A
4320 V
(18013)210 648 A
1110(if)S
1236(()S
((rmp->mp_flags)588 1320 A
1950(&)S
(IN_USE))294 2034 A
2370(==)S
2496(0)S
2580(||)S
((rmp->mp_flags)588 2706 A
3336(&)S
(HANGING))336 3420 A
3798())S
(return(OK);)462 3882 A
4410 V
(18014)210 648 A
(proc_id)294 1110 A
1446(=)S
(rmp->mp_pid;)504 1530 A
4500 V
(18015)210 648 A
(sig_map)294 1110 A
1446(=)S
((sigset_t))420 1530 A
(mm_in.SIG_MAP;)588 1992 A
4590 V
(18016)210 648 A
1110(mp)S
1236(=)S
(&mproc[0];)420 1320 A
2370(/*)S
(pretend)294 2496 A
(kernel)252 2832 A
(signals)294 3126 A
(are)126 3462 A
(from)168 3630 A
3840(MM)S
3966(*/)S
4680 V
(18017)210 648 A
(mp->mp_procgrp)588 1110 A
1740(=)S
(rmp->mp_procgrp;)672 1824 A
2706(/*)S
(get)126 2832 A
(process)294 3000 A
(group)210 3336 A
(right)210 3588 A
3840(*/)S
4770 V
(18018)210 648 A
4860 V
(18019)210 648 A
1110(/*)S
(Check)210 1236 A
(each)168 1488 A
(bit)126 1698 A
1866(in)S
(turn)168 1992 A
2202(to)S
(see)126 2328 A
2496(if)S
2622(a)S
(signal)252 2706 A
3000(is)S
3126(to)S
3252(be)S
(sent.)210 3378 A
(Unlike)252 3672 A
4950 V
(18020)210 648 A
1152(*)S
(kill(),)294 1236 A
(the)126 1572 A
(kernel)252 1740 A
(may)126 2034 A
(collect)294 2202 A
(several)294 2538 A
(unrelated)378 2874 A
(signals)294 3294 A
(for)126 3630 A
3798(a)S
5040 V
(18021)210 648 A
1152(*)S
(process)294 1236 A
(and)126 1572 A
(pass)168 1740 A
(them)168 1950 A
2160(to)S
2286(MM)S
2412(in)S
(one)126 2538 A
(blow.)210 2706 A
(Thus)168 3000 A
(loop)168 3210 A
3420(on)S
(the)126 3546 A
(bit)126 3714 A
5130 V
(18022)210 648 A
1152(*)S
(map.)168 1236 A
(For)126 1446 A
(SIGINT)252 1614 A
(and)126 1908 A
(SIGQUIT,)336 2076 A
(use)126 2454 A
(proc_id)294 2622 A
2958(0)S
3042(to)S
(indicate)336 3168 A
3546(a)S
(broadcast)378 3630 A
5220 V
(18023)210 648 A
1152(*)S
1236(to)S
(the)126 1362 A
(recipient's)462 1530 A
(process)294 2034 A
(group.)252 2370 A
(For)126 2706 A
(SIGKILL,)336 2874 A
(use)126 3252 A
(proc_id)294 3420 A
3756(-1)S
3882(to)S
5310 V
(18024)210 648 A
1152(*)S
(indicate)336 1236 A
1614(a)S
(systemwide)420 1698 A
(broadcast.)420 2160 A
5400 V
(18025)210 648 A
1152(*/)S
5490 V
(18026)210 648 A
(for)126 1110 A
1278((i)S
1404(=)S
1488(1;)S
1614(i)S
1698(<=)S
(_NSIG;)252 1824 A
(i++))168 2118 A
2328({)S
5580 V
(18027)210 648 A
1362(if)S
((!sigismember(&sig_map,)966 1488 A
(i)))126 2496 A
(continue;)378 2664 A
5670 V
(18028)210 648 A
(switch)252 1362 A
((i))126 1656 A
1824({)S
5760 V
(18029)210 648 A
(case)168 1530 A
(SIGINT:)294 1740 A
5850 V
(18030)210 648 A
(case)168 1530 A
(SIGQUIT:)336 1740 A
5940 V
(18031)210 648 A
1698(id)S
1824(=)S
1908(0;)S
(break;)252 2034 A
2370(/*)S
(broadcast)378 2496 A
2916(to)S
(process)294 3042 A
(group)210 3378 A
3630(*/)S
6030 V
(18032)210 648 A
(case)168 1530 A
(SIGKILL:)336 1740 A
6120 V
(18033)210 648 A
1698(id)S
1824(=)S
(-1;)126 1908 A
(break;)252 2076 A
2370(/*)S
(broadcast)378 2496 A
2916(to)S
(all)126 3042 A
(except)252 3210 A
(INIT)168 3504 A
3714(*/)S
6210 V
(18034)210 648 A
(case)168 1530 A
(SIGALRM:)336 1740 A
8418 V
EP
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/slant 0 def
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2068(File:)S
2301(src/mm/signal.c)S
12 B
(251)180 4248 A
900 V
7 LST
(18035)210 648 A
1698(/*)S
(Disregard)378 1824 A
(SIGALRM)294 2244 A
(when)168 2580 A
(the)126 2790 A
(target)252 2958 A
(process)294 3252 A
(has)126 3588 A
(not)126 3756 A
990 V
(18036)210 648 A
1740(*)S
(requested)378 1824 A
2244(an)S
(alarm.)252 2370 A
(This)168 2706 A
(only)168 2916 A
(applies)294 3126 A
(for)126 3462 A
3630(a)S
(KERNEL)252 3714 A
1080 V
(18037)210 648 A
1740(*)S
(generated)378 1824 A
(signal.)294 2244 A
1170 V
(18038)210 648 A
1740(*/)S
1260 V
(18039)210 648 A
1698(if)S
(((rmp->mp_flags)630 1824 A
2496(&)S
(ALARM_ON))378 2580 A
3000(==)S
3126(0))S
(continue;)378 3252 A
1350 V
(18040)210 648 A
(rmp->mp_flags)546 1698 A
2286(&=)S
(304ALARM_ON;)420 2412 A
1440 V
(18041)210 648 A
1698(/*)S
(fall)168 1824 A
(through)294 2034 A
2370(*/)S
1530 V
(18042)210 648 A
(default:)336 1530 A
1620 V
(18043)210 648 A
1698(id)S
1824(=)S
(proc_id;)336 1908 A
1710 V
(18044)210 648 A
(break;)252 1698 A
1800 V
(18045)210 648 A
1362(})S
1890 V
(18046)210 648 A
(check_sig(id,)546 1362 A
(i);)126 1950 A
1980 V
(18047)210 648 A
(sys_endsig(proc_nr);)840 1362 A
2370(/*)S
(tell)168 2496 A
(kernel)252 2706 A
(it's)168 3000 A
(done)168 3210 A
3420(*/)S
2070 V
(18048)210 648 A
1110(})S
2160 V
(18049)210 648 A
(return(OK);)462 1110 A
2250 V
(18050)210 648 A
1026(})S
2520 V
(18053)210 648 A
(/*===========================================================================*)3276 1026 A
2610 V
(18054)210 648 A
1068(*)S
(do_alarm)336 2370 A
4260(*)S
2700 V
(18055)210 648 A
(*===========================================================================*/)3276 1068 A
2790 V
(18056)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_alarm())420 1488 A
2880 V
(18057)210 648 A
1026({)S
2970 V
(18058)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(alarm(seconds))588 1656 A
(system)252 2286 A
(call.)210 2580 A
2832(*/)S
3060 V
(18059)210 648 A
3150 V
(18060)210 648 A
(return(set_alarm(who,)882 1110 A
(seconds));)420 2034 A
3240 V
(18061)210 648 A
1026(})S
3510 V
(18064)210 648 A
(/*===========================================================================*)3276 1026 A
3600 V
(18065)210 648 A
1068(*)S
(set_alarm)378 2370 A
4260(*)S
3690 V
(18066)210 648 A
(*===========================================================================*/)3276 1068 A
3780 V
(18067)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(set_alarm(proc_nr,)756 1488 A
(sec))168 2286 A
3870 V
(18068)210 648 A
(int)126 1026 A
(proc_nr;)336 1194 A
2370(/*)S
(process)294 2496 A
(that)168 2832 A
(wants)210 3042 A
(the)126 3294 A
(alarm)210 3462 A
3714(*/)S
3960 V
(18069)210 648 A
(int)126 1026 A
(sec;)168 1194 A
2370(/*)S
(how)126 2496 A
(many)168 2664 A
(seconds)294 2874 A
(delay)210 3210 A
(before)252 3462 A
(the)126 3756 A
(signal)252 3924 A
4218(*/)S
4050 V
(18070)210 648 A
1026({)S
4140 V
(18071)210 648 A
1026(/*)S
(This)168 1152 A
(routine)294 1362 A
1698(is)S
(used)168 1824 A
2034(by)S
(do_alarm())420 2160 A
2622(to)S
(set)126 2748 A
(the)126 2916 A
(alarm)210 3084 A
(timer.)252 3336 A
3672(It)S
3798(is)S
(also)168 3924 A
(used)168 4134 A
4230 V
(18072)210 648 A
1068(*)S
1152(to)S
(turn)168 1278 A
(the)126 1488 A
(timer)210 1656 A
(off)126 1908 A
(when)168 2076 A
2286(a)S
(process)294 2370 A
(exits)210 2706 A
(with)168 2958 A
(the)126 3168 A
(timer)210 3336 A
(still)210 3588 A
(on.)126 3840 A
4320 V
(18073)210 648 A
1068(*/)S
4410 V
(18074)210 648 A
4500 V
(18075)210 648 A
(message)294 1110 A
(m_sig;)252 1446 A
4590 V
(18076)210 648 A
(int)126 1110 A
(remaining;)420 1278 A
4680 V
(18077)210 648 A
4770 V
(18078)210 648 A
1110(if)S
((sec)168 1236 A
1446(!=)S
1572(0))S
4860 V
(18079)210 648 A
(mproc[proc_nr].mp_flags)966 1362 A
2370(|=)S
(ALARM_ON;)378 2496 A
4950 V
(18080)210 648 A
(else)168 1110 A
5040 V
(18081)210 648 A
(mproc[proc_nr].mp_flags)966 1362 A
2370(&=)S
(304ALARM_ON;)420 2496 A
5130 V
(18082)210 648 A
5220 V
(18083)210 648 A
1110(/*)S
(Tell)168 1236 A
(the)126 1446 A
(clock)210 1614 A
(task)168 1866 A
2076(to)S
(provide)294 2202 A
2538(a)S
(signal)252 2622 A
(message)294 2916 A
(when)168 3252 A
(the)126 3462 A
(time)168 3630 A
(comes.)252 3840 A
5310 V
(18084)210 648 A
1152(*)S
5400 V
(18085)210 648 A
1152(*)S
(Large)210 1236 A
(delays)252 1488 A
(cause)210 1782 A
2034(a)S
(lot)126 2118 A
2286(of)S
(problems.)378 2412 A
(First,)252 2874 A
(the)126 3168 A
(alarm)210 3336 A
(system)252 3588 A
(call)168 3882 A
5490 V
(18086)210 648 A
1152(*)S
(takes)210 1236 A
1488(an)S
(unsigned)336 1614 A
(seconds)294 1992 A
(count)210 2328 A
(and)126 2580 A
(the)126 2748 A
(library)294 2916 A
(has)126 3252 A
(cast)168 3420 A
3630(it)S
3756(to)S
3882(an)S
(int.)168 4008 A
5580 V
(18087)210 648 A
1152(*)S
(That)168 1236 A
(probably)336 1446 A
(works,)252 1824 A
(but)126 2118 A
2286(on)S
(return)252 2412 A
(the)126 2706 A
(library)294 2874 A
(will)168 3210 A
(convert)294 3420 A
("negative")420 3756 A
5670 V
(18088)210 648 A
1152(*)S
(unsigneds)378 1236 A
1656(to)S
(errors.)294 1782 A
(Presumably)420 2160 A
2622(no)S
(one)126 2748 A
(checks)252 2916 A
(for)126 3210 A
(these)210 3378 A
(errors,)294 3630 A
3966(so)S
5760 V
(18089)210 648 A
1152(*)S
(force)210 1236 A
(this)168 1488 A
(call)168 1698 A
(through.)336 1908 A
(Second,)294 2328 A
2664(If)S
(unsigned)336 2790 A
(and)126 3168 A
(long)168 3336 A
(have)168 3546 A
(the)126 3756 A
(same)168 3924 A
5850 V
(18090)210 648 A
1152(*)S
(size,)210 1236 A
(converting)420 1488 A
(from)168 1950 A
(seconds)294 2160 A
2496(to)S
(ticks)210 2622 A
(can)126 2874 A
(easily)252 3042 A
(overflow.)378 3336 A
(Finally,)336 3798 A
5940 V
(18091)210 648 A
1152(*)S
(the)126 1236 A
(kernel)252 1404 A
(has)126 1698 A
(similar)294 1866 A
(overflow)336 2202 A
(bugs)168 2580 A
(adding)252 2790 A
(ticks.)252 3084 A
6030 V
(18092)210 648 A
1152(*)S
6120 V
(18093)210 648 A
1152(*)S
(Fixing)252 1236 A
(this)168 1530 A
(requires)336 1740 A
2118(a)S
(lot)126 2202 A
2370(of)S
(ugly)168 2496 A
(casts)210 2706 A
2958(to)S
(fit)126 3084 A
(the)126 3252 A
(wrong)210 3420 A
(interface)378 3672 A
6210 V
(18094)210 648 A
1152(*)S
(types)210 1236 A
(and)126 1488 A
1656(to)S
(avoid)210 1782 A
(overflow)336 2034 A
(traps.)252 2412 A
(DELTA_TICKS)462 2748 A
(has)126 3252 A
(the)126 3420 A
(right)210 3588 A
(type)168 3840 A
8418 V
EP
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630 V
12 B
(252)180 648 A
11 R
2068(File:)S
2301(src/mm/signal.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(18095)210 648 A
1152(*)S
((clock_t))378 1236 A
(although)336 1656 A
2034(it)S
2160(is)S
(declared)336 2286 A
2664(as)S
(long.)210 2790 A
(How)126 3084 A
(can)126 3252 A
(variables)378 3420 A
(like)168 3840 A
990 V
(18096)210 648 A
1152(*)S
(this)168 1236 A
1446(be)S
(declared)336 1572 A
(properly)336 1950 A
(without)294 2328 A
(combinatorial)546 2664 A
(explosion)378 3252 A
3672(of)S
(message)294 3798 A
1080 V
(18097)210 648 A
1152(*)S
(types?)252 1236 A
1170 V
(18098)210 648 A
1152(*/)S
1260 V
(18099)210 648 A
(m_sig.m_type)504 1110 A
1656(=)S
(SET_ALARM;)420 1740 A
1350 V
(18100)210 648 A
(m_sig.CLOCK_PROC_NR)798 1110 A
1950(=)S
(proc_nr;)336 2034 A
1440 V
(18101)210 648 A
(m_sig.DELTA_TICKS)714 1110 A
1866(=)S
((clock_t))378 1950 A
((HZ)126 2370 A
2538(*)S
((unsigned)378 2622 A
(long))210 3042 A
((unsigned))420 3294 A
(sec);)210 3756 A
1530 V
(18102)210 648 A
1110(if)S
1236(()S
((unsigned)378 1320 A
(long))210 1740 A
(m_sig.DELTA_TICKS)714 1992 A
2748(/)S
2832(HZ)S
2958(!=)S
((unsigned))420 3084 A
(sec))168 3546 A
1620 V
(18103)210 648 A
(m_sig.DELTA_TICKS)714 1362 A
2118(=)S
(LONG_MAX;)378 2202 A
2706(/*)S
(eternity)336 2832 A
((really)294 3210 A
(CLOCK_T_MAX))504 3546 A
4092(*/)S
1710 V
(18104)210 648 A
1110(if)S
((sendrec(CLOCK,)630 1236 A
(&m_sig))294 1908 A
2244(!=)S
(OK))126 2370 A
(panic("alarm)504 2538 A
(er",)168 3084 A
(NO_NUM);)336 3294 A
1800 V
(18105)210 648 A
(remaining)378 1110 A
1530(=)S
((int))210 1614 A
(m_sig.SECONDS_LEFT;)798 1866 A
1890 V
(18106)210 648 A
1110(if)S
((remaining)420 1236 A
1698(!=)S
(m_sig.SECONDS_LEFT)756 1824 A
2622(||)S
(remaining)378 2748 A
3168(<)S
3252(0))S
1980 V
(18107)210 648 A
(remaining)378 1362 A
1782(=)S
(INT_MAX;)336 1866 A
2370(/*)S
(true)168 2496 A
(value)210 2706 A
2958(is)S
(not)126 3084 A
(representable)546 3252 A
3840(*/)S
2070 V
(18108)210 648 A
(return(remaining);)756 1110 A
2160 V
(18109)210 648 A
1026(})S
2430 V
(18112)210 648 A
(/*===========================================================================*)3276 1026 A
2520 V
(18113)210 648 A
1068(*)S
(do_pause)336 2370 A
4260(*)S
2610 V
(18114)210 648 A
(*===========================================================================*/)3276 1068 A
2700 V
(18115)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_pause())420 1488 A
2790 V
(18116)210 648 A
1026({)S
2880 V
(18117)210 648 A
1026(/*)S
(Perform)294 1152 A
(the)126 1488 A
(pause())294 1656 A
(system)252 1992 A
(call.)210 2286 A
2538(*/)S
2970 V
(18118)210 648 A
3060 V
(18119)210 648 A
(mp->mp_flags)504 1110 A
1656(|=)S
(PAUSED;)294 1782 A
3150 V
(18120)210 648 A
(dont_reply)420 1110 A
1572(=)S
(TRUE;)210 1656 A
3240 V
(18121)210 648 A
(return(OK);)462 1110 A
3330 V
(18122)210 648 A
1026(})S
3600 V
(18125)210 648 A
(/*=====================================================================*)3024 1026 A
3690 V
(18126)210 648 A
1068(*)S
(do_reboot)378 2202 A
4008(*)S
3780 V
(18127)210 648 A
(*=====================================================================*/)3024 1068 A
3870 V
(18128)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_reboot())462 1488 A
3960 V
(18129)210 648 A
1026({)S
4050 V
(18130)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rmp)168 2034 A
2244(=)S
(mp;)126 2328 A
4140 V
(18131)210 648 A
(char)168 1110 A
(monitor_code[64];)714 1320 A
4230 V
(18132)210 648 A
4320 V
(18133)210 648 A
1110(if)S
((rmp->mp_effuid)630 1236 A
1908(!=)S
(SUPER_USER))462 2034 A
(return)252 2622 A
(EPERM;)252 2916 A
4410 V
(18134)210 648 A
4500 V
(18135)210 648 A
(switch)252 1110 A
((reboot_flag))546 1404 A
1992({)S
4590 V
(18136)210 648 A
(case)168 1110 A
(RBT_HALT:)378 1320 A
4680 V
(18137)210 648 A
(case)168 1110 A
(RBT_REBOOT:)462 1320 A
4770 V
(18138)210 648 A
(case)168 1110 A
(RBT_PANIC:)420 1320 A
4860 V
(18139)210 648 A
(case)168 1110 A
(RBT_RESET:)420 1320 A
4950 V
(18140)210 648 A
(break;)252 1362 A
5040 V
(18141)210 648 A
(case)168 1110 A
(RBT_MONITOR:)504 1320 A
5130 V
(18142)210 648 A
1362(if)S
((reboot_size)504 1488 A
2034(>)S
(sizeof(monitor_code)))882 2118 A
(return)252 3042 A
(EINVAL;)294 3336 A
5220 V
(18143)210 648 A
(memset(monitor_code,)840 1362 A
2244(0,)S
(sizeof(monitor_code));)924 2370 A
5310 V
(18144)210 648 A
1362(if)S
((sys_copy(who,)588 1488 A
2118(D,)S
((phys_bytes))504 2244 A
(reboot_code,)504 2790 A
5400 V
(18145)210 648 A
(MM_PROC_NR,)462 1698 A
2202(D,)S
((phys_bytes))504 2328 A
(monitor_code,)546 2874 A
5490 V
(18146)210 648 A
((phys_bytes))504 1698 A
(reboot_size))504 2244 A
2790(!=)S
(OK))126 2916 A
(return)252 3084 A
(EFAULT;)294 3378 A
5580 V
(18147)210 648 A
1362(if)S
((monitor_code[sizeof(monitor_code)-1])1554 1488 A
3084(!=)S
3210(0))S
(return)252 3336 A
(EINVAL;)294 3630 A
5670 V
(18148)210 648 A
(break;)252 1362 A
5760 V
(18149)210 648 A
(default:)336 1110 A
5850 V
(18150)210 648 A
(return)252 1362 A
(EINVAL;)294 1656 A
5940 V
(18151)210 648 A
1110(})S
6030 V
(18152)210 648 A
6120 V
(18153)210 648 A
1110(/*)S
(Kill)168 1236 A
(all)126 1446 A
(processes)378 1614 A
(except)252 2034 A
(init.)210 2328 A
2580(*/)S
6210 V
(18154)210 648 A
(check_sig(-1,)546 1110 A
(SIGKILL);)378 1698 A
8418 V
EP
%%Page: 253 253
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2068(File:)S
2301(src/mm/signal.c)S
12 B
(253)180 4248 A
900 V
7 LST
(18155)210 648 A
990 V
(18156)210 648 A
(tell_fs(EXIT,)546 1110 A
(INIT_PROC_NR,)546 1698 A
2286(0,)S
(0);)126 2412 A
2706(/*)S
(cleanup)294 2832 A
(init)168 3168 A
3378(*/)S
1080 V
(18157)210 648 A
1170 V
(18158)210 648 A
(tell_fs(SYNC,0,0,0);)840 1110 A
1260 V
(18159)210 648 A
1350 V
(18160)210 648 A
(sys_abort(reboot_flag,)924 1110 A
(monitor_code);)588 2076 A
1440 V
(18161)210 648 A
1110(/*)S
(NOTREACHED)420 1236 A
1698(*/)S
1530 V
(18162)210 648 A
1026(})S
1800 V
(18165)210 648 A
(/*===========================================================================*)3276 1026 A
1890 V
(18166)210 648 A
1068(*)S
(sig_proc)336 2370 A
4260(*)S
1980 V
(18167)210 648 A
(*===========================================================================*/)3276 1068 A
2070 V
(18168)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(sig_proc(rmp,)546 1530 A
(signo))252 2118 A
2160 V
(18169)210 648 A
(register)336 1026 A
(struct)252 1404 A
(mproc)210 1698 A
(*rmp;)210 1950 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(the)126 2958 A
(process)294 3126 A
3462(to)S
3588(be)S
(signaled)336 3714 A
4092(*/)S
2250 V
(18170)210 648 A
(int)126 1026 A
(signo;)252 1194 A
2370(/*)S
(signal)252 2496 A
2790(to)S
(send)168 2916 A
3126(to)S
(process)294 3252 A
3588((1)S
3714(to)S
(_NSIG))252 3840 A
4134(*/)S
2340 V
(18171)210 648 A
1026({)S
2430 V
(18172)210 648 A
1026(/*)S
(Send)168 1152 A
1362(a)S
(signal)252 1446 A
1740(to)S
1866(a)S
(process.)336 1950 A
(Check)210 2370 A
2622(to)S
(see)126 2748 A
2916(if)S
(the)126 3042 A
(signal)252 3210 A
3504(is)S
3630(to)S
3756(be)S
(caught,)294 3882 A
2520 V
(18173)210 648 A
1068(*)S
(ignored,)336 1152 A
1530(or)S
(blocked.)336 1656 A
2076(If)S
(the)126 2202 A
(signal)252 2370 A
2664(is)S
2790(to)S
2916(be)S
(caught,)294 3042 A
(coordinate)420 3378 A
(with)168 3840 A
2610 V
(18174)210 648 A
1068(*)S
(KERNEL)252 1152 A
1446(to)S
(push)168 1572 A
1782(a)S
(sigcontext)420 1866 A
(structure)378 2328 A
(and)126 2748 A
2916(a)S
(sigframe)336 3000 A
(structure)378 3378 A
(onto)168 3798 A
2700 V
(18175)210 648 A
1068(*)S
(the)126 1152 A
(catcher's)378 1320 A
(stack.)252 1740 A
(Also,)210 2076 A
(KERNEL)252 2328 A
(will)168 2622 A
(reset)210 2832 A
(the)126 3084 A
(program)294 3252 A
(counter)294 3588 A
(and)126 3924 A
2790 V
(18176)210 648 A
1068(*)S
(stack)210 1152 A
(pointer,)336 1404 A
1782(so)S
(that)168 1908 A
(when)168 2118 A
(the)126 2328 A
(process)294 2496 A
(next)168 2832 A
(runs,)210 3042 A
3294(it)S
(will)168 3420 A
3630(be)S
(executing)378 3756 A
2880 V
(18177)210 648 A
1068(*)S
(the)126 1152 A
(signal)252 1320 A
(handler.)336 1614 A
(When)168 2034 A
(the)126 2244 A
(signal)252 2412 A
(handler)294 2706 A
(returns,)336 3042 A
(sigreturn(2))504 3462 A
2970 V
(18178)210 648 A
1068(*)S
(will)168 1152 A
1362(be)S
(called.)294 1488 A
(Then)168 1866 A
(KERNEL)252 2076 A
(will)168 2370 A
(restore)294 2580 A
(the)126 2916 A
(signal)252 3084 A
(context)294 3378 A
(from)168 3714 A
(the)126 3924 A
3060 V
(18179)210 648 A
1068(*)S
(sigcontext)420 1152 A
(structure.)420 1614 A
3150 V
(18180)210 648 A
1068(*)S
3240 V
(18181)210 648 A
1068(*)S
1152(If)S
(there)210 1278 A
1530(is)S
(insufficient)504 1656 A
(stack)210 2202 A
(space,)252 2454 A
(kill)168 2748 A
(the)126 2958 A
(process.)336 3126 A
3330 V
(18182)210 648 A
1068(*/)S
3420 V
(18183)210 648 A
3510 V
(18184)210 648 A
(vir_bytes)378 1110 A
(new_sp;)294 1530 A
3600 V
(18185)210 648 A
(int)126 1110 A
(slot;)210 1278 A
3690 V
(18186)210 648 A
(int)126 1110 A
(sigflags;)378 1278 A
3780 V
(18187)210 648 A
(struct)252 1110 A
(sigmsg)252 1404 A
(sm;)126 1698 A
3870 V
(18188)210 648 A
3960 V
(18189)210 648 A
(slot)168 1110 A
1320(=)S
((int))210 1404 A
((rmp)168 1656 A
1866(-)S
(mproc);)294 1950 A
4050 V
(18190)210 648 A
1110(if)S
((!(rmp->mp_flags)672 1236 A
1950(&)S
(IN_USE)))336 2034 A
2412({)S
4140 V
(18191)210 648 A
(printf("MM:)462 1362 A
(signal)252 1866 A
2160(%d)S
(sent)168 2286 A
2496(to)S
(dead)168 2622 A
(process)294 2832 A
(%d\n",)252 3168 A
(signo,)252 3462 A
(slot);)252 3756 A
4230 V
(18192)210 648 A
(panic("",)378 1362 A
(NO_NUM);)336 1782 A
4320 V
(18193)210 648 A
1110(})S
4410 V
(18194)210 648 A
1110(if)S
((rmp->mp_flags)588 1236 A
1866(&)S
(HANGING))336 1950 A
2328({)S
4500 V
(18195)210 648 A
(printf("MM:)462 1362 A
(signal)252 1866 A
2160(%d)S
(sent)168 2286 A
2496(to)S
(HANGING)294 2622 A
(process)294 2958 A
(%d\n",)252 3294 A
(signo,)252 3588 A
(slot);)252 3882 A
4590 V
(18196)210 648 A
(panic("",)378 1362 A
(NO_NUM);)336 1782 A
4680 V
(18197)210 648 A
1110(})S
4770 V
(18198)210 648 A
1110(if)S
((rmp->mp_flags)588 1236 A
1866(&)S
(TRACED)252 1950 A
2244(&&)S
(signo)210 2370 A
2622(!=)S
(SIGKILL))336 2748 A
3126({)S
4860 V
(18199)210 648 A
1362(/*)S
1488(A)S
(traced)252 1572 A
(process)294 1866 A
(has)126 2202 A
(special)294 2370 A
(handling.)378 2706 A
3126(*/)S
4950 V
(18200)210 648 A
(unpause(slot);)588 1362 A
5040 V
(18201)210 648 A
(stop_proc(rmp,)588 1362 A
(signo);)294 1992 A
2370(/*)S
2496(a)S
(signal)252 2580 A
(causes)252 2874 A
3168(it)S
3294(to)S
(stop)168 3420 A
3630(*/)S
5130 V
(18202)210 648 A
(return;)294 1362 A
5220 V
(18203)210 648 A
1110(})S
5310 V
(18204)210 648 A
1110(/*)S
(Some)168 1236 A
(signals)294 1446 A
(are)126 1782 A
(ignored)294 1950 A
2286(by)S
(default.)336 2412 A
2790(*/)S
5400 V
(18205)210 648 A
1110(if)S
((sigismember(&rmp->mp_ignore,)1218 1236 A
(signo)))294 2496 A
(return;)294 2832 A
5490 V
(18206)210 648 A
5580 V
(18207)210 648 A
1110(if)S
((sigismember(&rmp->mp_sigmask,)1260 1236 A
(signo)))294 2538 A
2874({)S
5670 V
(18208)210 648 A
1362(/*)S
(Signal)252 1488 A
(should)252 1782 A
2076(be)S
(blocked.)336 2202 A
2580(*/)S
5760 V
(18209)210 648 A
(sigaddset(&rmp->mp_sigpending,)1260 1362 A
(signo);)294 2664 A
5850 V
(18210)210 648 A
(return;)294 1362 A
5940 V
(18211)210 648 A
1110(})S
6030 V
(18212)210 648 A
(sigflags)336 1110 A
1488(=)S
(rmp->mp_sigact[signo].sa_flags;)1302 1572 A
6120 V
(18213)210 648 A
1110(if)S
((sigismember(&rmp->mp_catch,)1176 1236 A
(signo)))294 2454 A
2790({)S
6210 V
(18214)210 648 A
1362(if)S
((rmp->mp_flags)588 1488 A
2118(&)S
(SIGSUSPENDED))546 2202 A
8418 V
EP
%%Page: 254 254
BP
/slant 0 def
/height 0 def
630 V
12 B
(254)180 648 A
11 R
2068(File:)S
2301(src/mm/signal.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(18215)210 648 A
(sm.sm_mask)420 1698 A
2160(=)S
(rmp->mp_sigmask2;)714 2244 A
990 V
(18216)210 648 A
(else)168 1362 A
1080 V
(18217)210 648 A
(sm.sm_mask)420 1698 A
2160(=)S
(rmp->mp_sigmask;)672 2244 A
1170 V
(18218)210 648 A
(sm.sm_signo)462 1362 A
1866(=)S
(signo;)252 1950 A
1260 V
(18219)210 648 A
(sm.sm_sighandler)672 1362 A
2076(=)S
((vir_bytes))462 2160 A
(rmp->mp_sigact[signo].sa_handler;)1386 2664 A
1350 V
(18220)210 648 A
(sm.sm_sigreturn)630 1362 A
2034(=)S
(rmp->mp_sigreturn;)756 2118 A
1440 V
(18221)210 648 A
(sys_getsp(slot,)630 1362 A
(&new_sp);)378 2034 A
1530 V
(18222)210 648 A
(sm.sm_stkptr)504 1362 A
1908(=)S
(new_sp;)294 1992 A
1620 V
(18223)210 648 A
1710 V
(18224)210 648 A
1362(/*)S
(Make)168 1488 A
(room)168 1698 A
(for)126 1908 A
(the)126 2076 A
(sigcontext)420 2244 A
(and)126 2706 A
(sigframe)336 2874 A
(struct.)294 3252 A
3588(*/)S
1800 V
(18225)210 648 A
(new_sp)252 1362 A
1656(-=)S
(sizeof(struct)546 1782 A
(sigcontext))462 2370 A
1890 V
(18226)210 648 A
2412(+)S
2496(3)S
2580(*)S
(sizeof(char)462 2664 A
3168(*))S
3294(+)S
3378(2)S
3462(*)S
(sizeof(int);)504 3546 A
1980 V
(18227)210 648 A
2070 V
(18228)210 648 A
1362(if)S
((adjust(rmp,)504 1488 A
(rmp->mp_seg[D].mem_len,)966 2034 A
(new_sp))294 3042 A
3378(!=)S
(OK))126 3504 A
2160 V
(18229)210 648 A
(goto)168 1698 A
(doterminate;)504 1908 A
2250 V
(18230)210 648 A
2340 V
(18231)210 648 A
(rmp->mp_sigmask)630 1362 A
2034(|=)S
(rmp->mp_sigact[signo].sa_mask;)1260 2160 A
2430 V
(18232)210 648 A
1362(if)S
((sigflags)378 1488 A
1908(&)S
(SA_NODEFER))462 1992 A
2520 V
(18233)210 648 A
(sigdelset(&rmp->mp_sigmask,)1134 1698 A
(signo);)294 2874 A
2610 V
(18234)210 648 A
(else)168 1362 A
2700 V
(18235)210 648 A
(sigaddset(&rmp->mp_sigmask,)1134 1698 A
(signo);)294 2874 A
2790 V
(18236)210 648 A
2880 V
(18237)210 648 A
1362(if)S
((sigflags)378 1488 A
1908(&)S
(SA_RESETHAND))546 1992 A
2580({)S
2970 V
(18238)210 648 A
(sigdelset(&rmp->mp_catch,)1050 1698 A
(signo);)294 2790 A
3060 V
(18239)210 648 A
(rmp->mp_sigact[signo].sa_handler)1344 1698 A
3084(=)S
(SIG_DFL;)336 3168 A
3150 V
(18240)210 648 A
1362(})S
3240 V
(18241)210 648 A
3330 V
(18242)210 648 A
(sys_sendsig(slot,)714 1362 A
(&sm);)210 2118 A
3420 V
(18243)210 648 A
(sigdelset(&rmp->mp_sigpending,)1260 1362 A
(signo);)294 2664 A
3510 V
(18244)210 648 A
1362(/*)S
1488(If)S
(process)294 1614 A
1950(is)S
(hanging)294 2076 A
2412(on)S
(PAUSE,)252 2538 A
(WAIT,)210 2832 A
(SIGSUSPEND,)462 3084 A
(tty,)168 3588 A
(pipe,)210 3798 A
(etc.,)210 4050 A
3600 V
(18245)210 648 A
1404(*)S
(release)294 1488 A
(it.)126 1824 A
3690 V
(18246)210 648 A
1404(*/)S
3780 V
(18247)210 648 A
(unpause(slot);)588 1362 A
3870 V
(18248)210 648 A
(return;)294 1362 A
3960 V
(18249)210 648 A
1110(})S
4050 V
(18250)210 648 A
(doterminate:)504 1026 A
4140 V
(18251)210 648 A
1110(/*)S
(Signal)252 1236 A
(should)252 1530 A
(not)126 1824 A
1992(or)S
(cannot)252 2118 A
2412(be)S
(caught.)294 2538 A
(Terminate)378 2916 A
(the)126 3336 A
(process.)336 3504 A
3882(*/)S
4230 V
(18252)210 648 A
(rmp->mp_sigstatus)714 1110 A
1866(=)S
((char))252 1950 A
(signo;)252 2244 A
4320 V
(18253)210 648 A
1110(if)S
((sigismember(&core_sset,)1008 1236 A
(signo)))294 2286 A
2622({)S
4410 V
(18254)210 648 A
1362(/*)S
(Switch)252 1488 A
1782(to)S
(the)126 1908 A
(user's)252 2076 A
2370(FS)S
(environment)462 2496 A
(and)126 3000 A
(dump)168 3168 A
(core.)210 3378 A
3630(*/)S
4500 V
(18255)210 648 A
(tell_fs(CHDIR,)588 1362 A
(slot,)210 1992 A
(FALSE,)252 2244 A
(0);)126 2538 A
4590 V
(18256)210 648 A
(dump_core(rmp);)630 1362 A
4680 V
(18257)210 648 A
1110(})S
4770 V
(18258)210 648 A
(mm_exit(rmp,)504 1110 A
(0);)126 1656 A
2370(/*)S
(terminate)378 2496 A
(process)294 2916 A
3252(*/)S
4860 V
(18259)210 648 A
1026(})S
5130 V
(18262)210 648 A
(/*===========================================================================*)3276 1026 A
5220 V
(18263)210 648 A
1068(*)S
(check_sig)378 2370 A
4260(*)S
5310 V
(18264)210 648 A
(*===========================================================================*/)3276 1068 A
5400 V
(18265)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(check_sig(proc_id,)756 1488 A
(signo))252 2286 A
5490 V
(18266)210 648 A
(pid_t)210 1026 A
(proc_id;)336 1278 A
2370(/*)S
(pid)126 2496 A
2664(of)S
(proc)168 2790 A
3000(to)S
(sig,)168 3126 A
3336(or)S
3462(0)S
3546(or)S
(-1,)126 3672 A
3840(or)S
(-pgrp)210 3966 A
4218(*/)S
5580 V
(18267)210 648 A
(int)126 1026 A
(signo;)252 1194 A
2370(/*)S
(signal)252 2496 A
2790(to)S
(send)168 2916 A
3126(to)S
(process)294 3252 A
3588((0)S
3714(to)S
(_NSIG))252 3840 A
4134(*/)S
5670 V
(18268)210 648 A
1026({)S
5760 V
(18269)210 648 A
1026(/*)S
(Check)210 1152 A
1404(to)S
(see)126 1530 A
1698(if)S
1824(it)S
1950(is)S
(possible)336 2076 A
2454(to)S
(send)168 2580 A
2790(a)S
(signal.)294 2874 A
(The)126 3252 A
(signal)252 3420 A
(may)126 3714 A
(have)168 3882 A
4092(to)S
4218(be)S
5850 V
(18270)210 648 A
1068(*)S
(sent)168 1152 A
1362(to)S
1488(a)S
(group)210 1572 A
1824(of)S
(processes.)420 1950 A
(This)168 2454 A
(routine)294 2664 A
3000(is)S
(invoked)294 3126 A
3462(by)S
(the)126 3588 A
(KILL)168 3756 A
(system)252 3966 A
5940 V
(18271)210 648 A
1068(*)S
(call,)210 1152 A
(and)126 1404 A
(also)168 1572 A
(when)168 1782 A
(the)126 1992 A
(kernel)252 2160 A
(catches)294 2454 A
2790(a)S
(DEL)126 2874 A
3042(or)S
(other)210 3168 A
(signal.)294 3420 A
6030 V
(18272)210 648 A
1068(*/)S
6120 V
(18273)210 648 A
6210 V
(18274)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rmp;)210 2034 A
8418 V
EP
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/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2068(File:)S
2301(src/mm/signal.c)S
12 B
(255)180 4248 A
900 V
7 LST
(18275)210 648 A
(int)126 1110 A
(count;)252 1278 A
2370(/*)S
(count)210 2496 A
2748(#)S
2832(of)S
(signals)294 2958 A
(sent)168 3294 A
3504(*/)S
990 V
(18276)210 648 A
(int)126 1110 A
(error_code;)462 1278 A
1080 V
(18277)210 648 A
1170 V
(18278)210 648 A
1110(if)S
((signo)252 1236 A
1530(<)S
1614(0)S
1698(||)S
(signo)210 1824 A
2076(>)S
(_NSIG))252 2160 A
(return(EINVAL);)630 2454 A
1260 V
(18279)210 648 A
1350 V
(18280)210 648 A
1110(/*)S
(Return)252 1236 A
(EINVAL)252 1530 A
(for)126 1824 A
(attempts)336 1992 A
2370(to)S
(send)168 2496 A
(SIGKILL)294 2706 A
3042(to)S
(INIT)168 3168 A
(alone.)252 3378 A
3672(*/)S
1440 V
(18281)210 648 A
1110(if)S
((proc_id)336 1236 A
1614(==)S
(INIT_PID)336 1740 A
2118(&&)S
(signo)210 2244 A
2496(==)S
(SIGKILL))336 2622 A
(return(EINVAL);)630 3000 A
1530 V
(18282)210 648 A
1620 V
(18283)210 648 A
1110(/*)S
(Search)252 1236 A
(the)126 1530 A
(proc)168 1698 A
(table)210 1908 A
(for)126 2160 A
(processes)378 2328 A
2748(to)S
(signal.)294 2874 A
((See)168 3252 A
(forkexit.c)420 3462 A
(about)210 3924 A
1710 V
(18284)210 648 A
1152(*)S
(pid)126 1236 A
(magic.))294 1404 A
1800 V
(18285)210 648 A
1152(*/)S
1890 V
(18286)210 648 A
(count)210 1110 A
1362(=)S
1446(0;)S
1980 V
(18287)210 648 A
(error_code)420 1110 A
1572(=)S
(ESRCH;)252 1656 A
2070 V
(18288)210 648 A
(for)126 1110 A
((rmp)168 1278 A
1488(=)S
(&mproc[INIT_PROC_NR];)882 1572 A
(rmp)126 2496 A
2664(<)S
(&mproc[NR_PROCS];)714 2748 A
(rmp++))252 3504 A
3798({)S
2160 V
(18289)210 648 A
1362(if)S
1488(()S
((rmp->mp_flags)588 1572 A
2202(&)S
(IN_USE))294 2286 A
2622(==)S
2748(0))S
(continue;)378 2874 A
2250 V
(18290)210 648 A
1362(if)S
((rmp->mp_flags)588 1488 A
2118(&)S
(HANGING)294 2202 A
2538(&&)S
(signo)210 2664 A
2916(!=)S
3042(0))S
(continue;)378 3168 A
2340 V
(18291)210 648 A
2430 V
(18292)210 648 A
1362(/*)S
(Check)210 1488 A
(for)126 1740 A
(selection.)420 1908 A
2370(*/)S
2520 V
(18293)210 648 A
1362(if)S
((proc_id)336 1488 A
1866(>)S
1950(0)S
2034(&&)S
(proc_id)294 2160 A
2496(!=)S
(rmp->mp_pid))504 2622 A
(continue;)378 3168 A
2610 V
(18294)210 648 A
1362(if)S
((proc_id)336 1488 A
1866(==)S
1992(0)S
2076(&&)S
(mp->mp_procgrp)588 2202 A
2832(!=)S
(rmp->mp_procgrp))672 2958 A
(continue;)378 3672 A
2700 V
(18295)210 648 A
1362(if)S
((proc_id)336 1488 A
1866(==)S
1992(-1)S
2118(&&)S
(rmp->mp_pid)462 2244 A
2748(==)S
(INIT_PID))378 2874 A
(continue;)378 3294 A
2790 V
(18296)210 648 A
1362(if)S
((proc_id)336 1488 A
1866(<)S
1950(-1)S
2076(&&)S
(rmp->mp_procgrp)630 2202 A
2874(!=)S
(-proc_id))378 3000 A
(continue;)378 3420 A
2880 V
(18297)210 648 A
2970 V
(18298)210 648 A
1362(/*)S
(Check)210 1488 A
(for)126 1740 A
(permission.)462 1908 A
2412(*/)S
3060 V
(18299)210 648 A
1362(if)S
((mp->mp_effuid)588 1488 A
2118(!=)S
(SUPER_USER)420 2244 A
3150 V
(18300)210 648 A
1530(&&)S
(mp->mp_realuid)588 1656 A
2286(!=)S
(rmp->mp_realuid)630 2412 A
3240 V
(18301)210 648 A
1530(&&)S
(mp->mp_effuid)546 1656 A
2244(!=)S
(rmp->mp_realuid)630 2370 A
3330 V
(18302)210 648 A
1530(&&)S
(mp->mp_realuid)588 1656 A
2286(!=)S
(rmp->mp_effuid)588 2412 A
3420 V
(18303)210 648 A
1530(&&)S
(mp->mp_effuid)546 1656 A
2244(!=)S
(rmp->mp_effuid))630 2370 A
3042({)S
3510 V
(18304)210 648 A
(error_code)420 1698 A
2160(=)S
(EPERM;)252 2244 A
3600 V
(18305)210 648 A
(continue;)378 1698 A
3690 V
(18306)210 648 A
1362(})S
3780 V
(18307)210 648 A
3870 V
(18308)210 648 A
(count++;)336 1362 A
3960 V
(18309)210 648 A
1362(if)S
((signo)252 1488 A
1782(==)S
1908(0))S
(continue;)378 2034 A
4050 V
(18310)210 648 A
4140 V
(18311)210 648 A
1362(/*)S
('sig_proc')420 1488 A
(will)168 1950 A
(handle)252 2160 A
(the)126 2454 A
(disposition)462 2622 A
3126(of)S
(the)126 3252 A
(signal.)294 3420 A
(The)126 3798 A
4230 V
(18312)210 648 A
1404(*)S
(signal)252 1488 A
(may)126 1782 A
1950(be)S
(caught,)294 2076 A
(blocked,)336 2412 A
(ignored,)336 2790 A
3168(or)S
(cause)210 3294 A
(process)294 3546 A
4320 V
(18313)210 648 A
1404(*)S
(termination,)504 1488 A
(possibly)336 2034 A
(with)168 2412 A
(core)168 2622 A
(dump.)210 2832 A
4410 V
(18314)210 648 A
1404(*/)S
4500 V
(18315)210 648 A
(sig_proc(rmp,)546 1362 A
(signo);)294 1950 A
4590 V
(18316)210 648 A
4680 V
(18317)210 648 A
1362(if)S
((proc_id)336 1488 A
1866(>)S
1950(0))S
(break;)252 2076 A
2370(/*)S
(only)168 2496 A
(one)126 2706 A
(process)294 2874 A
(being)210 3210 A
(signaled)336 3462 A
3840(*/)S
4770 V
(18318)210 648 A
1110(})S
4860 V
(18319)210 648 A
4950 V
(18320)210 648 A
1110(/*)S
1236(If)S
(the)126 1362 A
(calling)294 1530 A
(process)294 1866 A
(has)126 2202 A
(killed)252 2370 A
(itself,)294 2664 A
(don't)210 3000 A
(reply.)252 3252 A
3546(*/)S
5040 V
(18321)210 648 A
1110(if)S
(((mp->mp_flags)588 1236 A
1866(&)S
(IN_USE))294 1950 A
2286(==)S
2412(0)S
2496(||)S
((mp->mp_flags)546 2622 A
3210(&)S
(HANGING)))378 3294 A
5130 V
(18322)210 648 A
(dont_reply)420 1362 A
1824(=)S
(TRUE;)210 1908 A
5220 V
(18323)210 648 A
(return(count)504 1110 A
1656(>)S
1740(0)S
1824(?)S
1908(OK)S
2034(:)S
(error_code);)504 2118 A
5310 V
(18324)210 648 A
1026(})S
5580 V
(18327)210 648 A
(/*===========================================================================*)3276 1026 A
5670 V
(18328)210 648 A
1068(*)S
(check_pending)546 2412 A
4260(*)S
5760 V
(18329)210 648 A
(*===========================================================================*/)3276 1068 A
5850 V
(18330)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(check_pending())630 1572 A
5940 V
(18331)210 648 A
1026({)S
6030 V
(18332)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
(any)126 1908 A
(pending)294 2076 A
(signals)294 2412 A
(have)168 2748 A
(been)168 2958 A
(unblocked.)420 3168 A
(The)126 3672 A
6120 V
(18333)210 648 A
1152(*)S
(first)210 1236 A
(such)168 1488 A
(signal)252 1698 A
(found)210 1992 A
2244(is)S
(delivered.)420 2370 A
6210 V
(18334)210 648 A
1152(*)S
8418 V
EP
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/slant 0 def
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630 V
12 B
(256)180 648 A
11 R
2068(File:)S
2301(src/mm/signal.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(18335)210 648 A
1152(*)S
1236(If)S
(multiple)336 1362 A
(pending)294 1740 A
(unmasked)336 2076 A
(signals)294 2454 A
(are)126 2790 A
(found,)252 2958 A
(they)168 3252 A
(will)168 3462 A
3672(be)S
990 V
(18336)210 648 A
1152(*)S
(delivered)378 1236 A
(sequentially.)546 1656 A
1080 V
(18337)210 648 A
1152(*)S
1170 V
(18338)210 648 A
1152(*)S
(There)210 1236 A
(are)126 1488 A
(several)294 1656 A
(places)252 1992 A
2286(in)S
(this)168 2412 A
(file)168 2622 A
(where)210 2832 A
(the)126 3084 A
(signal)252 3252 A
(mask)168 3546 A
3756(is)S
1260 V
(18339)210 648 A
1152(*)S
(changed.)336 1236 A
1656(At)S
(each)168 1782 A
(such)168 1992 A
(place,)252 2202 A
(check_pending())630 2496 A
(should)252 3168 A
3462(be)S
(called)252 3588 A
3882(to)S
1350 V
(18340)210 648 A
1152(*)S
(check)210 1236 A
(for)126 1488 A
(newly)210 1656 A
(unblocked)378 1908 A
(signals.)336 2328 A
1440 V
(18341)210 648 A
1152(*/)S
1530 V
(18342)210 648 A
1620 V
(18343)210 648 A
(int)126 1110 A
1278(i;)S
1710 V
(18344)210 648 A
1800 V
(18345)210 648 A
(for)126 1110 A
1278((i)S
1404(=)S
1488(1;)S
1614(i)S
1698(<)S
(_NSIG;)252 1782 A
(i++))168 2076 A
2286({)S
1890 V
(18346)210 648 A
1362(if)S
((sigismember(&mp->mp_sigpending,)1344 1488 A
2874(i))S
3000(&&)S
1980 V
(18347)210 648 A
(!sigismember(&mp->mp_sigmask,)1218 1698 A
(i)))126 2958 A
3126({)S
2070 V
(18348)210 648 A
(sigdelset(&mp->mp_sigpending,)1218 1698 A
(i);)126 2958 A
2160 V
(18349)210 648 A
(sig_proc(mp,)504 1698 A
(i);)126 2244 A
2250 V
(18350)210 648 A
(break;)252 1698 A
2340 V
(18351)210 648 A
1362(})S
2430 V
(18352)210 648 A
1110(})S
2520 V
(18353)210 648 A
1026(})S
2790 V
(18356)210 648 A
(/*===========================================================================*)3276 1026 A
2880 V
(18357)210 648 A
1068(*)S
(unpause)294 2370 A
4260(*)S
2970 V
(18358)210 648 A
(*===========================================================================*/)3276 1068 A
3060 V
(18359)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(unpause(pro))504 1572 A
3150 V
(18360)210 648 A
(int)126 1026 A
(pro;)168 1194 A
2370(/*)S
(which)210 2496 A
(process)294 2748 A
(number)252 3084 A
3378(*/)S
3240 V
(18361)210 648 A
1026({)S
3330 V
(18362)210 648 A
1026(/*)S
1152(A)S
(signal)252 1236 A
1530(is)S
1656(to)S
1782(be)S
(sent)168 1908 A
2118(to)S
2244(a)S
(process.)336 2328 A
2748(If)S
(that)168 2874 A
(process)294 3084 A
3420(is)S
(hanging)294 3546 A
3882(on)S
4008(a)S
3420 V
(18363)210 648 A
1068(*)S
(system)252 1152 A
(call,)210 1446 A
(the)126 1698 A
(system)252 1866 A
(call)168 2160 A
(must)168 2370 A
2580(be)S
(terminated)420 2706 A
(with)168 3168 A
(EINTR.)252 3378 A
(Possible)336 3714 A
3510 V
(18364)210 648 A
1068(*)S
(calls)210 1152 A
(are)126 1404 A
(PAUSE,)252 1572 A
(WAIT,)210 1866 A
(READ)168 2118 A
(and)126 2328 A
(WRITE,)252 2496 A
(the)126 2790 A
(latter)252 2958 A
(two)126 3252 A
(for)126 3420 A
(pipes)210 3588 A
(and)126 3840 A
(ttys.)210 4008 A
3600 V
(18365)210 648 A
1068(*)S
(First)210 1152 A
(check)210 1404 A
1656(if)S
(the)126 1782 A
(process)294 1950 A
2286(is)S
(hanging)294 2412 A
2748(on)S
2874(an)S
3000(MM)S
(call.)210 3126 A
3420(If)S
(not,)168 3546 A
(tell)168 3756 A
(FS,)126 3966 A
3690 V
(18366)210 648 A
1068(*)S
1152(so)S
1278(it)S
(can)126 1404 A
(check)210 1572 A
(for)126 1824 A
(READs)210 1992 A
(and)126 2244 A
(WRITEs)252 2412 A
(from)168 2706 A
(pipes,)252 2916 A
(ttys)168 3210 A
(and)126 3420 A
(the)126 3588 A
(like.)210 3756 A
3780 V
(18367)210 648 A
1068(*/)S
3870 V
(18368)210 648 A
3960 V
(18369)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rmp;)210 2034 A
4050 V
(18370)210 648 A
4140 V
(18371)210 648 A
(rmp)126 1110 A
1278(=)S
(&mproc[pro];)504 1362 A
4230 V
(18372)210 648 A
4320 V
(18373)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
(process)294 1908 A
2244(is)S
(hanging)294 2370 A
2706(on)S
2832(a)S
(PAUSE)210 2916 A
(call.)210 3168 A
3420(*/)S
4410 V
(18374)210 648 A
1110(if)S
1236(()S
((rmp->mp_flags)588 1320 A
1950(&)S
(PAUSED))294 2034 A
2370(&&)S
((rmp->mp_flags)588 2496 A
3126(&)S
(HANGING))336 3210 A
3588(==)S
3714(0))S
3840({)S
4500 V
(18375)210 648 A
(rmp->mp_flags)546 1362 A
1950(&=)S
(304PAUSED;)336 2076 A
4590 V
(18376)210 648 A
(reply(pro,)420 1362 A
(EINTR,)252 1824 A
2118(0,)S
(NIL_PTR);)378 2244 A
4680 V
(18377)210 648 A
(return;)294 1362 A
4770 V
(18378)210 648 A
1110(})S
4860 V
(18379)210 648 A
4950 V
(18380)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
(process)294 1908 A
2244(is)S
(hanging)294 2370 A
2706(on)S
2832(a)S
(WAIT)168 2916 A
(call.)210 3126 A
3378(*/)S
5040 V
(18381)210 648 A
1110(if)S
1236(()S
((rmp->mp_flags)588 1320 A
1950(&)S
(WAITING))336 2034 A
2412(&&)S
((rmp->mp_flags)588 2538 A
3168(&)S
(HANGING))336 3252 A
3630(==)S
3756(0))S
3882({)S
5130 V
(18382)210 648 A
(rmp->mp_flags)546 1362 A
1950(&=)S
(304WAITING;)378 2076 A
5220 V
(18383)210 648 A
(reply(pro,)420 1362 A
(EINTR,)252 1824 A
2118(0,)S
(NIL_PTR);)378 2244 A
5310 V
(18384)210 648 A
(return;)294 1362 A
5400 V
(18385)210 648 A
1110(})S
5490 V
(18386)210 648 A
5580 V
(18387)210 648 A
1110(/*)S
(Check)210 1236 A
1488(to)S
(see)126 1614 A
1782(if)S
(process)294 1908 A
2244(is)S
(hanging)294 2370 A
2706(on)S
2832(a)S
(SIGSUSPEND)420 2916 A
(call.)210 3378 A
3630(*/)S
5670 V
(18388)210 648 A
1110(if)S
(((rmp->mp_flags)630 1236 A
1908(&)S
(SIGSUSPENDED))546 1992 A
2580(&&)S
((rmp->mp_flags)588 2706 A
3336(&)S
(HANGING))336 3420 A
3798(==)S
3924(0))S
4050({)S
5760 V
(18389)210 648 A
(rmp->mp_flags)546 1362 A
1950(&=)S
(304SIGSUSPENDED;)588 2076 A
5850 V
(18390)210 648 A
(reply(pro,)420 1362 A
(EINTR,)252 1824 A
2118(0,)S
(NIL_PTR);)378 2244 A
5940 V
(18391)210 648 A
(return;)294 1362 A
6030 V
(18392)210 648 A
1110(})S
6120 V
(18393)210 648 A
6210 V
(18394)210 648 A
1110(/*)S
(Process)294 1236 A
1572(is)S
(not)126 1698 A
(hanging)294 1866 A
2202(on)S
2328(an)S
2454(MM)S
(call.)210 2580 A
(Ask)126 2874 A
3042(FS)S
3168(to)S
(take)168 3294 A
3504(a)S
(look.)210 3588 A
3840(*/)S
8418 V
EP
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/slant 0 def
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2068(File:)S
2301(src/mm/signal.c)S
12 B
(257)180 4248 A
900 V
7 LST
(18395)210 648 A
(tell_fs(UNPAUSE,)672 1362 A
(pro,)168 2076 A
2286(0,)S
(0);)126 2412 A
990 V
(18396)210 648 A
1026(})S
1260 V
(18399)210 648 A
(/*===========================================================================*)3276 1026 A
1350 V
(18400)210 648 A
1068(*)S
(dump_core)378 2370 A
4260(*)S
1440 V
(18401)210 648 A
(*===========================================================================*/)3276 1068 A
1530 V
(18402)210 648 A
(PRIVATE)294 1026 A
(void)168 1362 A
(dump_core(rmp))588 1572 A
1620 V
(18403)210 648 A
(register)336 1026 A
(struct)252 1404 A
(mproc)210 1698 A
(*rmp;)210 1950 A
2370(/*)S
(whose)210 2496 A
(core)168 2748 A
2958(is)S
3084(to)S
3210(be)S
(dumped)252 3336 A
3630(*/)S
1710 V
(18404)210 648 A
1026({)S
1800 V
(18405)210 648 A
1026(/*)S
(Make)168 1152 A
1362(a)S
(core)168 1446 A
(dump)168 1656 A
1866(on)S
(the)126 1992 A
(file)168 2160 A
("core",)294 2370 A
2706(if)S
(possible.)378 2832 A
3252(*/)S
1890 V
(18406)210 648 A
1980 V
(18407)210 648 A
(int)126 1110 A
(fd,)126 1278 A
(fake_fd,)336 1446 A
(nr_written,)462 1824 A
(seg,)168 2328 A
(slot;)210 2538 A
2070 V
(18408)210 648 A
(char)168 1110 A
(*buf;)210 1320 A
2160 V
(18409)210 648 A
(vir_bytes)378 1110 A
(current_sp;)462 1530 A
2250 V
(18410)210 648 A
(phys_bytes)420 1110 A
(left;)210 1572 A
2370(/*)S
(careful;)336 2496 A
(64K)126 2874 A
(might)210 3042 A
(overflow)336 3294 A
(vir_bytes)378 3672 A
4092(*/)S
2340 V
(18411)210 648 A
(unsigned)336 1110 A
(nr_to_write;)504 1488 A
2370(/*)S
(unsigned)336 2496 A
(for)126 2874 A
(arg)126 3042 A
3210(to)S
(write())294 3336 A
(but)126 3672 A
3840(<)S
(INT_MAX)294 3924 A
4260(*/)S
2430 V
(18412)210 648 A
(long)168 1110 A
(trace_data,)462 1320 A
(trace_off;)420 1824 A
2520 V
(18413)210 648 A
2610 V
(18414)210 648 A
(slot)168 1110 A
1320(=)S
((int))210 1404 A
((rmp)168 1656 A
1866(-)S
(mproc);)294 1950 A
2700 V
(18415)210 648 A
2790 V
(18416)210 648 A
1110(/*)S
(Can)126 1236 A
(core)168 1404 A
(file)168 1614 A
1824(be)S
(written?)336 1950 A
2370(We)S
(are)126 2496 A
(operating)378 2664 A
3084(in)S
(the)126 3210 A
(user's)252 3378 A
3672(FS)S
(environment,)504 3798 A
2880 V
(18417)210 648 A
1152(*)S
1236(so)S
1362(no)S
(special)294 1488 A
(permission)420 1824 A
(checks)252 2286 A
(are)126 2580 A
(needed.)294 2748 A
2970 V
(18418)210 648 A
1152(*/)S
3060 V
(18419)210 648 A
1110(if)S
((rmp->mp_realuid)672 1236 A
1950(!=)S
(rmp->mp_effuid))630 2076 A
(return;)294 2748 A
3150 V
(18420)210 648 A
1110(if)S
1236(()S
((fd)126 1320 A
1488(=)S
(creat(core_name,)672 1572 A
(CORE_MODE)))462 2286 A
2790(<)S
2874(0))S
(return;)294 3000 A
3240 V
(18421)210 648 A
(rmp->mp_sigstatus)714 1110 A
1866(|=)S
(DUMPED;)294 1992 A
3330 V
(18422)210 648 A
3420 V
(18423)210 648 A
1110(/*)S
(Make)168 1236 A
(sure)168 1446 A
(the)126 1656 A
(stack)210 1824 A
(segment)294 2076 A
2412(is)S
2538(up)S
2664(to)S
(date.)210 2790 A
3510 V
(18424)210 648 A
1152(*)S
1236(We)S
(don't)210 1362 A
(want)168 1614 A
(adjust())336 1824 A
2202(to)S
(fail)168 2328 A
(unless)252 2538 A
(current_sp)420 2832 A
3294(is)S
(preposterous,)546 3420 A
3600 V
(18425)210 648 A
1152(*)S
(but)126 1236 A
1404(it)S
(might)210 1530 A
(fail)168 1782 A
(due)126 1992 A
2160(to)S
(safety)252 2286 A
(checking.)378 2580 A
(Also,)210 3042 A
3294(we)S
(don't)210 3420 A
(really)252 3672 A
(want)168 3966 A
3690 V
(18426)210 648 A
1152(*)S
(the)126 1236 A
(adjust())336 1404 A
(for)126 1782 A
(sending)294 1950 A
2286(a)S
(signal)252 2370 A
2664(to)S
(fail)168 2790 A
(due)126 3000 A
3168(to)S
(safety)252 3294 A
(checking.)378 3588 A
3780 V
(18427)210 648 A
1152(*)S
(Maybe)210 1236 A
(make)168 1488 A
(SAFETY_BYTES)504 1698 A
2244(a)S
(parameter.)420 2328 A
3870 V
(18428)210 648 A
1152(*/)S
3960 V
(18429)210 648 A
(sys_getsp(slot,)630 1110 A
(&current_sp);)546 1782 A
4050 V
(18430)210 648 A
(adjust(rmp,)462 1110 A
(rmp->mp_seg[D].mem_len,)966 1614 A
(current_sp);)504 2622 A
4140 V
(18431)210 648 A
4230 V
(18432)210 648 A
1110(/*)S
(Write)210 1236 A
(the)126 1488 A
(memory)252 1656 A
(map)126 1950 A
2118(of)S
(all)126 2244 A
(segments)336 2412 A
2790(to)S
(begin)210 2916 A
(the)126 3168 A
(core)168 3336 A
(file.)210 3546 A
3798(*/)S
4320 V
(18433)210 648 A
1110(if)S
((write(fd,)420 1236 A
((char)210 1698 A
1950(*))S
(rmp->mp_seg,)504 2076 A
((unsigned))420 2622 A
(sizeof)252 3084 A
(rmp->mp_seg))504 3378 A
4410 V
(18434)210 648 A
1278(!=)S
((unsigned))420 1404 A
(sizeof)252 1866 A
(rmp->mp_seg))504 2160 A
2706({)S
4500 V
(18435)210 648 A
(close(fd);)420 1362 A
4590 V
(18436)210 648 A
(return;)294 1362 A
4680 V
(18437)210 648 A
1110(})S
4770 V
(18438)210 648 A
4860 V
(18439)210 648 A
1110(/*)S
(Write)210 1236 A
(out)126 1488 A
(the)126 1656 A
(whole)210 1824 A
(kernel)252 2076 A
(process)294 2370 A
(table)210 2706 A
(entry)210 2958 A
3210(to)S
(get)126 3336 A
(the)126 3504 A
(regs.)210 3672 A
3924(*/)S
4950 V
(18440)210 648 A
(trace_off)378 1110 A
1530(=)S
1614(0;)S
5040 V
(18441)210 648 A
(while)210 1110 A
((sys_trace(3,)546 1362 A
(slot,)210 1950 A
(trace_off,)420 2202 A
(&trace_data))504 2664 A
3210(==)S
(OK))126 3336 A
3504({)S
5130 V
(18442)210 648 A
1362(if)S
((write(fd,)420 1488 A
((char)210 1950 A
2202(*))S
(&trace_data,)504 2328 A
((unsigned))420 2874 A
(sizeof)252 3336 A
((long)))294 3630 A
5220 V
(18443)210 648 A
1530(!=)S
((unsigned))420 1656 A
(sizeof)252 2118 A
((long)))294 2412 A
2748({)S
5310 V
(18444)210 648 A
(close(fd);)420 1698 A
5400 V
(18445)210 648 A
(return;)294 1698 A
5490 V
(18446)210 648 A
1362(})S
5580 V
(18447)210 648 A
(trace_off)378 1362 A
1782(+=)S
(sizeof)252 1908 A
((long);)294 2202 A
5670 V
(18448)210 648 A
1110(})S
5760 V
(18449)210 648 A
5850 V
(18450)210 648 A
1110(/*)S
(Loop)168 1236 A
(through)294 1446 A
(segments)336 1782 A
(and)126 2160 A
(write)210 2328 A
(the)126 2580 A
(segments)336 2748 A
(themselves)420 3126 A
(out.)168 3588 A
3798(*/)S
5940 V
(18451)210 648 A
(for)126 1110 A
((seg)168 1278 A
1488(=)S
1572(0;)S
(seg)126 1698 A
1866(<)S
(NR_SEGS;)336 1950 A
(seg++))252 2328 A
2622({)S
6030 V
(18452)210 648 A
(buf)126 1362 A
1530(=)S
((char)210 1614 A
1866(*))S
(((vir_bytes))504 1992 A
(rmp->mp_seg[seg].mem_vir)1008 2538 A
3588(<<)S
(CLICK_SHIFT);)546 3714 A
6120 V
(18453)210 648 A
(left)168 1362 A
1572(=)S
((phys_bytes))504 1656 A
(rmp->mp_seg[seg].mem_len)1008 2202 A
3252(<<)S
(CLICK_SHIFT;)504 3378 A
6210 V
(18454)210 648 A
(fake_fd)294 1362 A
1698(=)S
((slot)210 1782 A
2034(<<)S
2160(8))S
2286(|)S
((seg)168 2370 A
2580(<<)S
2706(6))S
2832(|)S
(fd;)126 2916 A
8418 V
EP
%%Page: 258 258
BP
/slant 0 def
/height 0 def
630 V
12 B
(258)180 648 A
11 R
2068(File:)S
2301(src/mm/signal.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(18455)210 648 A
990 V
(18456)210 648 A
1362(/*)S
(Loop)168 1488 A
(through)294 1698 A
2034(a)S
(segment,)336 2118 A
(dumping)294 2496 A
(it.)126 2832 A
3000(*/)S
1080 V
(18457)210 648 A
(while)210 1362 A
((left)210 1614 A
1866(!=)S
1992(0))S
2118({)S
1170 V
(18458)210 648 A
(nr_to_write)462 1698 A
2202(=)S
((unsigned))420 2286 A
(MIN(left,)378 2748 A
(DUMP_SIZE);)462 3168 A
1260 V
(18459)210 648 A
1698(if)S
1824(()S
((nr_written)462 1908 A
2412(=)S
(write(fake_fd,)588 2496 A
(buf,)168 3126 A
(nr_to_write)))546 3336 A
3924(<)S
4008(0))S
4134({)S
1350 V
(18460)210 648 A
(close(fd);)420 2034 A
1440 V
(18461)210 648 A
(return;)294 2034 A
1530 V
(18462)210 648 A
1698(})S
1620 V
(18463)210 648 A
(buf)126 1698 A
1866(+=)S
(nr_written;)462 1992 A
1710 V
(18464)210 648 A
(left)168 1698 A
1908(-=)S
(nr_written;)462 2034 A
1800 V
(18465)210 648 A
1362(})S
1890 V
(18466)210 648 A
1110(})S
1980 V
(18467)210 648 A
(close(fd);)420 1110 A
2070 V
(18468)210 648 A
1026(})S
2340 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
2430 V
(src/mm/getset.c)630 2034 A
2520 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
2700 V
(18500)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(handles)294 1572 A
(the)126 1908 A
2076(4)S
(system)252 2160 A
(calls)210 2454 A
(that)168 2706 A
(get)126 2916 A
(and)126 3084 A
(set)126 3252 A
(uids)168 3420 A
(and)126 3630 A
(gids.)210 3798 A
2790 V
(18501)210 648 A
1068(*)S
1152(It)S
(also)168 1278 A
(handles)294 1488 A
(getpid(),)378 1824 A
(setsid(),)378 2244 A
(and)126 2664 A
(getpgrp().)420 2832 A
(The)126 3336 A
(code)168 3504 A
(for)126 3714 A
(each)168 3882 A
2880 V
(18502)210 648 A
1068(*)S
(one)126 1152 A
1320(is)S
1446(so)S
(tiny)168 1572 A
(that)168 1782 A
1992(it)S
(hardly)252 2118 A
(seemed)252 2412 A
(worthwhile)420 2706 A
3168(to)S
(make)168 3294 A
(each)168 3504 A
3714(a)S
(separate)336 3798 A
2970 V
(18503)210 648 A
1068(*)S
(function.)378 1152 A
3060 V
(18504)210 648 A
1068(*/)S
3150 V
(18505)210 648 A
3240 V
(18506)210 648 A
(#include)336 1026 A
("mm.h")252 1404 A
3330 V
(18507)210 648 A
(#include)336 1026 A
(<minix/callnr.h>)672 1404 A
3420 V
(18508)210 648 A
(#include)336 1026 A
(<signal.h>)420 1404 A
3510 V
(18509)210 648 A
(#include)336 1026 A
("mproc.h")378 1404 A
3600 V
(18510)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
3690 V
(18511)210 648 A
3780 V
(18512)210 648 A
(/*===========================================================================*)3276 1026 A
3870 V
(18513)210 648 A
1068(*)S
(do_getset)378 2370 A
4260(*)S
3960 V
(18514)210 648 A
(*===========================================================================*/)3276 1068 A
4050 V
(18515)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_getset())462 1488 A
4140 V
(18516)210 648 A
1026({)S
4230 V
(18517)210 648 A
1026(/*)S
(Handle)252 1152 A
(GETUID,)294 1446 A
(GETGID,)294 1782 A
(GETPID,)294 2118 A
(GETPGRP,)336 2454 A
(SETUID,)294 2832 A
(SETGID,)294 3168 A
(SETSID.)294 3504 A
(The)126 3882 A
(four)168 4050 A
4320 V
(18518)210 648 A
1068(*)S
(GETs)168 1152 A
(and)126 1362 A
(SETSID)252 1530 A
(return)252 1824 A
(their)210 2118 A
(primary)294 2370 A
(results)294 2706 A
3042(in)S
('r'.)168 3168 A
(GETUID,)294 3420 A
(GETGID,)294 3756 A
(and)126 4092 A
4410 V
(18519)210 648 A
1068(*)S
(GETPID)252 1152 A
(also)168 1446 A
(return)252 1656 A
(secondary)378 1950 A
(results)294 2370 A
((the)168 2706 A
(effective)378 2916 A
(IDs,)168 3336 A
3546(or)S
(the)126 3672 A
(parent)252 3840 A
4500 V
(18520)210 648 A
1068(*)S
(process)294 1152 A
(ID))126 1488 A
1656(in)S
('result2',)420 1782 A
(which)210 2244 A
2496(is)S
(returned)336 2622 A
3000(to)S
(the)126 3126 A
(user.)210 3294 A
4590 V
(18521)210 648 A
1068(*/)S
4680 V
(18522)210 648 A
4770 V
(18523)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rmp)168 2034 A
2244(=)S
(mp;)126 2328 A
4860 V
(18524)210 648 A
(register)336 1110 A
(int)126 1488 A
1656(r;)S
4950 V
(18525)210 648 A
5040 V
(18526)210 648 A
(switch(mm_call))630 1110 A
1782({)S
5130 V
(18527)210 648 A
(case)168 1362 A
(GETUID:)294 1572 A
5220 V
(18528)210 648 A
1698(r)S
1782(=)S
(rmp->mp_realuid;)672 1866 A
5310 V
(18529)210 648 A
(result2)294 1698 A
2034(=)S
(rmp->mp_effuid;)630 2118 A
5400 V
(18530)210 648 A
(break;)252 1698 A
5490 V
(18531)210 648 A
5580 V
(18532)210 648 A
(case)168 1362 A
(GETGID:)294 1572 A
5670 V
(18533)210 648 A
1698(r)S
1782(=)S
(rmp->mp_realgid;)672 1866 A
5760 V
(18534)210 648 A
(result2)294 1698 A
2034(=)S
(rmp->mp_effgid;)630 2118 A
5850 V
(18535)210 648 A
(break;)252 1698 A
5940 V
(18536)210 648 A
6030 V
(18537)210 648 A
(case)168 1362 A
(GETPID:)294 1572 A
6120 V
(18538)210 648 A
1698(r)S
1782(=)S
(mproc[who].mp_pid;)756 1866 A
6210 V
(18539)210 648 A
(result2)294 1698 A
2034(=)S
(mproc[rmp->mp_parent].mp_pid;)1218 2118 A
8418 V
EP
%%Page: 259 259
BP
/slant 0 def
/height 0 def
630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2070(File:)S
2303(src/mm/getset.c)S
12 B
(259)180 4248 A
900 V
7 LST
(18540)210 648 A
(break;)252 1698 A
990 V
(18541)210 648 A
1080 V
(18542)210 648 A
(case)168 1362 A
(SETUID:)294 1572 A
1170 V
(18543)210 648 A
1698(if)S
((rmp->mp_realuid)672 1824 A
2538(!=)S
(usr_id)252 2664 A
2958(&&)S
(rmp->mp_effuid)588 3084 A
3714(!=)S
(SUPER_USER))462 3840 A
1260 V
(18544)210 648 A
(return(EPERM);)588 2034 A
1350 V
(18545)210 648 A
(rmp->mp_realuid)630 1698 A
2370(=)S
(usr_id;)294 2454 A
1440 V
(18546)210 648 A
(rmp->mp_effuid)588 1698 A
2328(=)S
(usr_id;)294 2412 A
1530 V
(18547)210 648 A
(tell_fs(SETUID,)630 1698 A
(who,)168 2370 A
(usr_id,)294 2580 A
(usr_id);)336 2916 A
1620 V
(18548)210 648 A
1698(r)S
1782(=)S
(OK;)126 1866 A
1710 V
(18549)210 648 A
(break;)252 1698 A
1800 V
(18550)210 648 A
1890 V
(18551)210 648 A
(case)168 1362 A
(SETGID:)294 1572 A
1980 V
(18552)210 648 A
1698(if)S
((rmp->mp_realgid)672 1824 A
2538(!=)S
(grpid)210 2664 A
2916(&&)S
(rmp->mp_effuid)588 3042 A
3672(!=)S
(SUPER_USER))462 3798 A
2070 V
(18553)210 648 A
(return(EPERM);)588 2034 A
2160 V
(18554)210 648 A
(rmp->mp_realgid)630 1698 A
2370(=)S
(grpid;)252 2454 A
2250 V
(18555)210 648 A
(rmp->mp_effgid)588 1698 A
2328(=)S
(grpid;)252 2412 A
2340 V
(18556)210 648 A
(tell_fs(SETGID,)630 1698 A
(who,)168 2370 A
(grpid,)252 2580 A
(grpid);)294 2874 A
2430 V
(18557)210 648 A
1698(r)S
1782(=)S
(OK;)126 1866 A
2520 V
(18558)210 648 A
(break;)252 1698 A
2610 V
(18559)210 648 A
2700 V
(18560)210 648 A
(case)168 1362 A
(SETSID:)294 1572 A
2790 V
(18561)210 648 A
1698(if)S
((rmp->mp_procgrp)672 1824 A
2538(==)S
(rmp->mp_pid))504 2664 A
(return(EPERM);)588 3210 A
2880 V
(18562)210 648 A
(rmp->mp_procgrp)630 1698 A
2370(=)S
(rmp->mp_pid;)504 2454 A
2970 V
(18563)210 648 A
(tell_fs(SETSID,)630 1698 A
(who,)168 2370 A
2580(0,)S
(0);)126 2706 A
3060 V
(18564)210 648 A
(/*FALL)252 1698 A
(THROUGH*/)378 1992 A
3150 V
(18565)210 648 A
3240 V
(18566)210 648 A
(case)168 1362 A
(GETPGRP:)336 1572 A
3330 V
(18567)210 648 A
1698(r)S
1782(=)S
(rmp->mp_procgrp;)672 1866 A
3420 V
(18568)210 648 A
(break;)252 1698 A
3510 V
(18569)210 648 A
3600 V
(18570)210 648 A
(default:)336 1362 A
3690 V
(18571)210 648 A
1698(r)S
1782(=)S
(EINVAL;)294 1866 A
3780 V
(18572)210 648 A
(break;)252 1698 A
3870 V
(18573)210 648 A
1110(})S
3960 V
(18574)210 648 A
(return(r);)420 1110 A
4050 V
(18575)210 648 A
1026(})S
4590 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
4680 V
(src/mm/trace.c)588 2034 A
4770 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
4950 V
(18600)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
(handles)294 1572 A
(the)126 1908 A
(memory)252 2076 A
(manager's)378 2370 A
(part)168 2790 A
3000(of)S
(debugging,)420 3126 A
(using)210 3588 A
(the)126 3840 A
5040 V
(18601)210 648 A
1068(*)S
(ptrace)252 1152 A
(system)252 1446 A
(call.)210 1740 A
(Most)168 1992 A
2202(of)S
(the)126 2328 A
(commands)336 2496 A
(are)126 2874 A
(passed)252 3042 A
3336(on)S
3462(to)S
(the)126 3588 A
(system)252 3756 A
5130 V
(18602)210 648 A
1068(*)S
(task)168 1152 A
(for)126 1362 A
(completion.)462 1530 A
5220 V
(18603)210 648 A
1068(*)S
5310 V
(18604)210 648 A
1068(*)S
(The)126 1152 A
(debugging)378 1320 A
(commands)336 1740 A
(available)378 2118 A
(are:)168 2538 A
5400 V
(18605)210 648 A
1068(*)S
(T_STOP)252 1152 A
(stop)168 1698 A
(the)126 1908 A
(process)294 2076 A
5490 V
(18606)210 648 A
1068(*)S
(T_OK)168 1152 A
(enable)252 1698 A
(tracing)294 1992 A
2328(by)S
(parent)252 2454 A
(for)126 2748 A
(this)168 2916 A
(process)294 3126 A
5580 V
(18607)210 648 A
1068(*)S
(T_GETINS)336 1152 A
(return)252 1698 A
(value)210 1992 A
(from)168 2244 A
(instruction)462 2454 A
(space)210 2958 A
5670 V
(18608)210 648 A
1068(*)S
(T_GETDATA)378 1152 A
(return)252 1698 A
(value)210 1992 A
(from)168 2244 A
(data)168 2454 A
(space)210 2664 A
5760 V
(18609)210 648 A
1068(*)S
(T_GETUSER)378 1152 A
(return)252 1698 A
(value)210 1992 A
(from)168 2244 A
(user)168 2454 A
(process)294 2664 A
(table)210 3000 A
5850 V
(18610)210 648 A
1068(*)S
(T_SETINS)336 1152 A
(set)126 1698 A
(value)210 1866 A
2118(in)S
(instruction)462 2244 A
(space)210 2748 A
5940 V
(18611)210 648 A
1068(*)S
(T_SETDATA)378 1152 A
(set)126 1698 A
(value)210 1866 A
2118(in)S
(data)168 2244 A
(space)210 2454 A
6030 V
(18612)210 648 A
1068(*)S
(T_SETUSER)378 1152 A
(set)126 1698 A
(value)210 1866 A
2118(in)S
(user)168 2244 A
(process)294 2454 A
(table)210 2790 A
6120 V
(18613)210 648 A
1068(*)S
(T_RESUME)336 1152 A
(resume)252 1698 A
(execution)378 1992 A
6210 V
(18614)210 648 A
1068(*)S
(T_EXIT)252 1152 A
(exit)168 1698 A
8418 V
EP
%%Page: 260 260
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/slant 0 def
/height 0 def
630 V
12 B
(260)180 648 A
11 R
2091(File:)S
(src/mm/trace.c)660 2324 A
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(18615)210 648 A
1068(*)S
(T_STEP)252 1152 A
(set)126 1698 A
(trace)210 1866 A
(bit)126 2118 A
990 V
(18616)210 648 A
1068(*)S
1080 V
(18617)210 648 A
1068(*)S
(The)126 1152 A
(T_OK)168 1320 A
(and)126 1530 A
(T_EXIT)252 1698 A
(commands)336 1992 A
(are)126 2370 A
(handled)294 2538 A
(here,)210 2874 A
(and)126 3126 A
(the)126 3294 A
(T_RESUME)336 3462 A
(and)126 3840 A
1170 V
(18618)210 648 A
1068(*)S
(T_STEP)252 1152 A
(commands)336 1446 A
(are)126 1824 A
(partially)378 1992 A
(handled)294 2412 A
(here)168 2748 A
(and)126 2958 A
(completed)378 3126 A
3546(by)S
(the)126 3672 A
(system)252 3840 A
1260 V
(18619)210 648 A
1068(*)S
(task.)210 1152 A
(The)126 1404 A
(rest)168 1572 A
(are)126 1782 A
(handled)294 1950 A
(entirely)336 2286 A
2664(by)S
(the)126 2790 A
(system)252 2958 A
(task.)210 3252 A
1350 V
(18620)210 648 A
1068(*/)S
1440 V
(18621)210 648 A
1530 V
(18622)210 648 A
(#include)336 1026 A
("mm.h")252 1404 A
1620 V
(18623)210 648 A
(#include)336 1026 A
(<sys/ptrace.h>)588 1404 A
1710 V
(18624)210 648 A
(#include)336 1026 A
(<signal.h>)420 1404 A
1800 V
(18625)210 648 A
(#include)336 1026 A
("mproc.h")378 1404 A
1890 V
(18626)210 648 A
(#include)336 1026 A
("param.h")378 1404 A
1980 V
(18627)210 648 A
2070 V
(18628)210 648 A
(#define)294 1026 A
(NIL_MPROC)378 1362 A
(((struct)336 2034 A
(mproc)210 2412 A
2664(*))S
2790(0))S
2160 V
(18629)210 648 A
2250 V
(18630)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(struct)252 1866 A
(mproc)210 2160 A
(*findproc,)420 2412 A
((pid_t)252 2874 A
(lpid))210 3168 A
3420();)S
2340 V
(18631)210 648 A
2430 V
(18632)210 648 A
(/*===========================================================================*)3276 1026 A
2520 V
(18633)210 648 A
1068(*)S
(do_trace)336 2370 A
4260(*)S
2610 V
(18634)210 648 A
(*===========================================================================*/)3276 1068 A
2700 V
(18635)210 648 A
(PUBLIC)252 1026 A
(int)126 1320 A
(do_trace())420 1488 A
2790 V
(18636)210 648 A
1026({)S
2880 V
(18637)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*child;)294 2034 A
2970 V
(18638)210 648 A
3060 V
(18639)210 648 A
1110(/*)S
(the)126 1236 A
(T_OK)168 1404 A
(call)168 1614 A
1824(is)S
(made)168 1950 A
2160(by)S
(the)126 2286 A
(child)210 2454 A
(fork)168 2706 A
2916(of)S
(the)126 3042 A
(debugger)336 3210 A
(before)252 3588 A
3882(it)S
(execs)210 4008 A
3150 V
(18640)210 648 A
1152(*)S
(the)126 1236 A
(process)294 1404 A
1740(to)S
1866(be)S
(traced)252 1992 A
3240 V
(18641)210 648 A
1152(*/)S
3330 V
(18642)210 648 A
1110(if)S
((request)336 1236 A
1614(==)S
(T_OK))210 1740 A
({/*)126 1992 A
(enable)252 2160 A
(tracing)294 2454 A
2790(by)S
(parent)252 2916 A
(for)126 3210 A
(this)168 3378 A
(process)294 3588 A
3924(*/)S
3420 V
(18643)210 648 A
(mp->mp_flags)504 1362 A
1908(|=)S
(TRACED;)294 2034 A
3510 V
(18644)210 648 A
(mm_out.m2_l2)504 1362 A
1908(=)S
1992(0;)S
3600 V
(18645)210 648 A
(return(OK);)462 1362 A
3690 V
(18646)210 648 A
1110(})S
3780 V
(18647)210 648 A
1110(if)S
(((child)294 1236 A
1572(=)S
(findproc(pid)))588 1656 A
2286(==)S
(NIL_MPROC)378 2412 A
2832(||)S
(!(child->mp_flags)714 2958 A
3714(&)S
(STOPPED)))378 3798 A
4218({)S
3870 V
(18648)210 648 A
(return(ESRCH);)588 1362 A
3960 V
(18649)210 648 A
1110(})S
4050 V
(18650)210 648 A
1110(/*)S
(all)126 1236 A
(the)126 1404 A
(other)210 1572 A
(calls)210 1824 A
(are)126 2076 A
(made)168 2244 A
2454(by)S
(the)126 2580 A
(parent)252 2748 A
(fork)168 3042 A
3252(of)S
(the)126 3378 A
(debugger)336 3546 A
3924(to)S
4140 V
(18651)210 648 A
1152(*)S
(control)294 1236 A
(execution)378 1572 A
1992(of)S
(the)126 2118 A
(child)210 2286 A
4230 V
(18652)210 648 A
1152(*/)S
4320 V
(18653)210 648 A
(switch)252 1110 A
((request))378 1404 A
1824({)S
4410 V
(18654)210 648 A
(case)168 1110 A
(T_EXIT:)294 1320 A
2034(/*)S
(exit)168 2160 A
2370(*/)S
4500 V
(18655)210 648 A
(mm_exit(child,)588 1362 A
((int)data);)462 1992 A
4590 V
(18656)210 648 A
(mm_out.m2_l2)504 1362 A
1908(=)S
1992(0;)S
4680 V
(18657)210 648 A
(return(OK);)462 1362 A
4770 V
(18658)210 648 A
(case)168 1110 A
(T_RESUME:)378 1320 A
4860 V
(18659)210 648 A
(case)168 1110 A
(T_STEP:)294 1320 A
2034(/*)S
(resume)252 2160 A
(execution)378 2454 A
2874(*/)S
4950 V
(18660)210 648 A
1362(if)S
((data)210 1488 A
1740(<)S
1824(0)S
1908(||)S
(data)168 2034 A
2244(>)S
(_NSIG))252 2328 A
(return(EIO);)504 2622 A
5040 V
(18661)210 648 A
1362(if)S
((data)210 1488 A
1740(>)S
1824(0))S
1950({)S
2370(/*)S
(issue)210 2496 A
(signal)252 2748 A
3042(*/)S
5130 V
(18662)210 648 A
(child->mp_flags)630 1698 A
2370(&=)S
(304TRACED;)336 2496 A
2916(/*)S
3042(so)S
(signal)252 3168 A
3462(is)S
(not)126 3588 A
(diverted)336 3756 A
4134(*/)S
5220 V
(18663)210 648 A
(sig_proc(child,)630 1698 A
((int))210 2370 A
(data);)252 2622 A
5310 V
(18664)210 648 A
(child->mp_flags)630 1698 A
2370(|=)S
(TRACED;)294 2496 A
5400 V
(18665)210 648 A
1362(})S
5490 V
(18666)210 648 A
(child->mp_flags)630 1362 A
2034(&=)S
(304STOPPED;)378 2160 A
5580 V
(18667)210 648 A
(break;)252 1362 A
5670 V
(18668)210 648 A
1110(})S
5760 V
(18669)210 648 A
1110(if)S
((sys_trace(request,)798 1236 A
((int))210 2076 A
((child)252 2328 A
2622(-)S
(mproc),)294 2706 A
(taddr,)252 3042 A
(&data))252 3336 A
3630(!=)S
(OK))126 3756 A
5850 V
(18670)210 648 A
(return(-errno);)630 1362 A
5940 V
(18671)210 648 A
(mm_out.m2_l2)504 1110 A
1656(=)S
(data;)210 1740 A
6030 V
(18672)210 648 A
(return(OK);)462 1110 A
6120 V
(18673)210 648 A
1026(})S
8418 V
EP
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BP
/slant 0 def
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2091(File:)S
(src/mm/trace.c)660 2324 A
12 B
(261)180 4248 A
900 V
7 LST
(18675)210 648 A
(/*===========================================================================*)3276 1026 A
990 V
(18676)210 648 A
1068(*)S
(findproc)336 2370 A
4260(*)S
1080 V
(18677)210 648 A
(*===========================================================================*/)3276 1068 A
1170 V
(18678)210 648 A
(PRIVATE)294 1026 A
(struct)252 1362 A
(mproc)210 1656 A
(*findproc(lpid))630 1908 A
1260 V
(18679)210 648 A
(pid_t)210 1026 A
(lpid;)210 1278 A
1350 V
(18680)210 648 A
1026({)S
1440 V
(18681)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rmp;)210 2034 A
1530 V
(18682)210 648 A
1620 V
(18683)210 648 A
(for)126 1110 A
((rmp)168 1278 A
1488(=)S
(&mproc[INIT_PROC_NR)798 1572 A
2412(+)S
(1];)126 2496 A
(rmp)126 2664 A
2832(<)S
(&mproc[NR_PROCS];)714 2916 A
(rmp++))252 3672 A
1710 V
(18684)210 648 A
1362(if)S
((rmp->mp_flags)588 1488 A
2118(&)S
(IN_USE)252 2202 A
2496(&&)S
(rmp->mp_pid)462 2622 A
3126(==)S
(lpid))210 3252 A
(return(rmp);)504 3504 A
1800 V
(18685)210 648 A
(return(NIL_MPROC);)756 1110 A
1890 V
(18686)210 648 A
1026(})S
2070 V
(18688)210 648 A
(/*===========================================================================*)3276 1026 A
2160 V
(18689)210 648 A
1068(*)S
(stop_proc)378 2370 A
4260(*)S
2250 V
(18690)210 648 A
(*===========================================================================*/)3276 1068 A
2340 V
(18691)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(stop_proc(rmp,)588 1530 A
(signo))252 2160 A
2430 V
(18692)210 648 A
(register)336 1026 A
(struct)252 1404 A
(mproc)210 1698 A
(*rmp;)210 1950 A
2520 V
(18693)210 648 A
(int)126 1026 A
(signo;)252 1194 A
2610 V
(18694)210 648 A
1026({)S
2700 V
(18695)210 648 A
1026(/*)S
1152(A)S
(traced)252 1236 A
(process)294 1530 A
(got)126 1866 A
2034(a)S
(signal)252 2118 A
2412(so)S
(stop)168 2538 A
(it.)126 2748 A
2916(*/)S
2790 V
(18696)210 648 A
2880 V
(18697)210 648 A
(register)336 1110 A
(struct)252 1488 A
(mproc)210 1782 A
(*rpmp)210 2034 A
2286(=)S
(mproc)210 2370 A
2622(+)S
(rmp->mp_parent;)630 2706 A
2970 V
(18698)210 648 A
3060 V
(18699)210 648 A
1110(if)S
((sys_trace(-1,)588 1236 A
((int))210 1866 A
((rmp)168 2118 A
2328(-)S
(mproc),)294 2412 A
(0L,)126 2748 A
((long)210 2916 A
3168(*))S
3294(0))S
3420(!=)S
(OK))126 3546 A
(return;)294 3714 A
3150 V
(18700)210 648 A
(rmp->mp_flags)546 1110 A
1698(|=)S
(STOPPED;)336 1824 A
3240 V
(18701)210 648 A
1110(if)S
((rpmp->mp_flags)630 1236 A
1908(&)S
(WAITING))336 1992 A
2370({)S
3330 V
(18702)210 648 A
(rpmp->mp_flags)588 1362 A
1992(&=)S
(304WAITING;)378 2118 A
2706(/*)S
(parent)252 2832 A
3126(is)S
3252(no)S
(longer)252 3378 A
(waiting)294 3672 A
4008(*/)S
3420 V
(18703)210 648 A
(reply(rmp->mp_parent,)882 1362 A
(rmp->mp_pid,)504 2286 A
(0177)168 2832 A
3042(|)S
((signo)252 3126 A
3420(<<)S
(8),)126 3546 A
(NIL_PTR);)378 3714 A
3510 V
(18704)210 648 A
1110(})S
(else)168 1194 A
1404({)S
3600 V
(18705)210 648 A
(rmp->mp_sigstatus)714 1362 A
2118(=)S
(signo;)252 2202 A
3690 V
(18706)210 648 A
1110(})S
3780 V
(18707)210 648 A
(return;)294 1110 A
3870 V
(18708)210 648 A
1026(})S
4140 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
4230 V
(src/mm/alloc.c)588 2034 A
4320 V
(++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++)3528 648 A
4500 V
(18800)210 648 A
1026(/*)S
(This)168 1152 A
(file)168 1362 A
1572(is)S
(concerned)378 1698 A
(with)168 2118 A
(allocating)420 2328 A
(and)126 2790 A
(freeing)294 2958 A
(arbitrary-size)588 3294 A
(blocks)252 3924 A
4218(of)S
4590 V
(18801)210 648 A
1068(*)S
(physical)336 1152 A
(memory)252 1530 A
1824(on)S
(behalf)252 1950 A
2244(of)S
(the)126 2370 A
(FORK)168 2538 A
(and)126 2748 A
(EXEC)168 2916 A
(system)252 3126 A
(calls.)252 3420 A
(The)126 3756 A
(key)126 3924 A
(data)168 4092 A
4680 V
(18802)210 648 A
1068(*)S
(structure)378 1152 A
(used)168 1572 A
1782(is)S
(the)126 1908 A
(hole)168 2076 A
(table,)252 2286 A
(which)210 2580 A
(maintains)378 2832 A
3252(a)S
(list)168 3336 A
3546(of)S
(holes)210 3672 A
3924(in)S
(memory.)294 4050 A
4770 V
(18803)210 648 A
1068(*)S
1152(It)S
1278(is)S
(kept)168 1404 A
(sorted)252 1614 A
1908(in)S
(order)210 2034 A
2286(of)S
(increasing)420 2412 A
(memory)252 2874 A
(address.)336 3168 A
(The)126 3546 A
(addresses)378 3714 A
4860 V
(18804)210 648 A
1068(*)S
1152(it)S
(contains)336 1278 A
(refer)210 1656 A
1908(to)S
(physical)336 2034 A
(memory,)294 2412 A
(starting)336 2748 A
3126(at)S
(absolute)336 3252 A
(address)294 3630 A
3966(0)S
4950 V
(18805)210 648 A
1068(*)S
((i.e.,)252 1152 A
(they)168 1446 A
(are)126 1656 A
(not)126 1824 A
(relative)336 1992 A
2370(to)S
(the)126 2496 A
(start)210 2664 A
2916(of)S
(MM).)168 3042 A
(During)252 3294 A
(system)252 3588 A
5040 V
(18806)210 648 A
1068(*)S
(initialization,)630 1152 A
(that)168 1824 A
(part)168 2034 A
2244(of)S
(memory)252 2370 A
(containing)420 2664 A
(the)126 3126 A
(interrupt)378 3294 A
(vectors,)336 3714 A
5130 V
(18807)210 648 A
1068(*)S
(kernel,)294 1152 A
(and)126 1488 A
1656(MM)S
(are)126 1782 A
("allocated")462 1950 A
2454(to)S
(mark)168 2580 A
(them)168 2790 A
3000(as)S
(not)126 3126 A
(available)378 3294 A
(and)126 3714 A
3882(to)S
5220 V
(18808)210 648 A
1068(*)S
(remove)252 1152 A
(them)168 1446 A
(from)168 1656 A
(the)126 1866 A
(hole)168 2034 A
(list.)210 2244 A
5310 V
(18809)210 648 A
1068(*)S
5400 V
(18810)210 648 A
1068(*)S
(The)126 1152 A
(entry)210 1320 A
(points)252 1572 A
(into)168 1866 A
(this)168 2076 A
(file)168 2286 A
(are:)168 2496 A
5490 V
(18811)210 648 A
1068(*)S
(alloc_mem:)420 1236 A
(allocate)336 1698 A
2076(a)S
(given)210 2160 A
(sized)210 2412 A
(chunk)210 2664 A
2916(of)S
(memory)252 3042 A
5580 V
(18812)210 648 A
1068(*)S
(free_mem:)378 1236 A
(release)294 1698 A
2034(a)S
(previously)420 2118 A
(allocated)378 2580 A
(chunk)210 3000 A
3252(of)S
(memory)252 3378 A
5670 V
(18813)210 648 A
1068(*)S
(mem_init:)378 1236 A
(initialize)420 1698 A
(the)126 2160 A
(tables)252 2328 A
(when)168 2622 A
2832(MM)S
(start)210 2958 A
3210(up)S
5760 V
(18814)210 648 A
1068(*)S
(max_hole:)378 1236 A
(returns)294 1698 A
(the)126 2034 A
(largest)294 2202 A
(hole)168 2538 A
(currently)378 2748 A
(available)378 3168 A
5850 V
(18815)210 648 A
1068(*/)S
5940 V
(18816)210 648 A
6030 V
(18817)210 648 A
(#include)336 1026 A
("mm.h")252 1404 A
6120 V
(18818)210 648 A
(#include)336 1026 A
(<minix/com.h>)546 1404 A
6210 V
(18819)210 648 A
8418 V
EP
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630 V
12 B
(262)180 648 A
11 R
2092(File:)S
2325(src/mm/alloc.c)S
10 R
3402(MINIX)S
3730(SOURCE)S
4153(CODE)S
900 V
7 LST
(18820)210 648 A
(#define)294 1026 A
(NR_HOLES)336 1362 A
(128)126 2076 A
2370(/*)S
(max)126 2496 A
2664(#)S
(entries)294 2748 A
3084(in)S
(hole)168 3210 A
(table)210 3420 A
3672(*/)S
990 V
(18821)210 648 A
(#define)294 1026 A
(NIL_HOLE)336 1362 A
((struct)294 1740 A
(hole)168 2076 A
2286(*))S
2412(0)S
1080 V
(18822)210 648 A
1170 V
(18823)210 648 A
(PRIVATE)294 1026 A
(struct)252 1362 A
(hole)168 1656 A
1866({)S
1260 V
(18824)210 648 A
(phys_clicks)462 1110 A
(h_base;)294 1614 A
2370(/*)S
(where)210 2496 A
(does)168 2748 A
(the)126 2958 A
(hole)168 3126 A
(begin?)252 3336 A
3630(*/)S
1350 V
(18825)210 648 A
(phys_clicks)462 1110 A
(h_len;)252 1614 A
2370(/*)S
(how)126 2496 A
(big)126 2664 A
2832(is)S
(the)126 2958 A
(hole?)210 3126 A
3378(*/)S
1440 V
(18826)210 648 A
(struct)252 1110 A
(hole)168 1404 A
(*h_next;)336 1614 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(next)168 2958 A
(entry)210 3168 A
3420(on)S
(the)126 3546 A
(list)168 3714 A
3924(*/)S
1530 V
(18827)210 648 A
1026(})S
(hole[NR_HOLES];)630 1110 A
1620 V
(18828)210 648 A
1710 V
(18829)210 648 A
1800 V
(18830)210 648 A
(PRIVATE)294 1026 A
(struct)252 1362 A
(hole)168 1656 A
(*hole_head;)462 1866 A
2370(/*)S
(pointer)294 2496 A
2832(to)S
(first)210 2958 A
(hole)168 3210 A
3420(*/)S
1890 V
(18831)210 648 A
(PRIVATE)294 1026 A
(struct)252 1362 A
(hole)168 1656 A
(*free_slots;)504 1866 A
2706(/*)S
(ptr)126 2832 A
3000(to)S
(list)168 3126 A
3336(of)S
(unused)252 3462 A
(table)210 3756 A
(slots)210 4008 A
4260(*/)S
1980 V
(18832)210 648 A
2070 V
(18833)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(del_slot,)378 2076 A
((struct)294 2496 A
(hole)168 2832 A
(*prev_ptr,)420 3042 A
(struct)252 3504 A
(hole)168 3798 A
(*hp))168 4008 A
4218();)S
2160 V
(18834)210 648 A
(FORWARD)294 1026 A
(_PROTOTYPE()462 1362 A
(void)168 1866 A
(merge,)252 2076 A
((struct)294 2370 A
(hole)168 2706 A
(*hp))168 2916 A
4218();)S
2250 V
(18835)210 648 A
2340 V
(18836)210 648 A
2430 V
(18837)210 648 A
(/*===========================================================================*)3276 1026 A
2520 V
(18838)210 648 A
1068(*)S
(alloc_mem)378 2370 A
4260(*)S
2610 V
(18839)210 648 A
(*===========================================================================*/)3276 1068 A
2700 V
(18840)210 648 A
(PUBLIC)252 1026 A
(phys_clicks)462 1320 A
(alloc_mem(clicks))714 1824 A
2790 V
(18841)210 648 A
(phys_clicks)462 1026 A
(clicks;)294 1530 A
2370(/*)S
(amount)252 2496 A
2790(of)S
(memory)252 2916 A
(requested)378 3210 A
3630(*/)S
2880 V
(18842)210 648 A
1026({)S
2970 V
(18843)210 648 A
1026(/*)S
(Allocate)336 1152 A
1530(a)S
(block)210 1614 A
1866(of)S
(memory)252 1992 A
(from)168 2286 A
(the)126 2496 A
(free)168 2664 A
(list)168 2874 A
(using)210 3084 A
(first)210 3336 A
(fit.)168 3588 A
(The)126 3798 A
(block)210 3966 A
3060 V
(18844)210 648 A
1068(*)S
(consists)336 1152 A
1530(of)S
1656(a)S
(sequence)336 1740 A
2118(of)S
(contiguous)420 2244 A
(bytes,)252 2706 A
(whose)210 3000 A
(length)252 3252 A
3546(in)S
(clicks)252 3672 A
3966(is)S
3150 V
(18845)210 648 A
1068(*)S
(given)210 1152 A
1404(by)S
('clicks'.)378 1530 A
1992(A)S
(pointer)294 2076 A
2412(to)S
(the)126 2538 A
(block)210 2706 A
2958(is)S
(returned.)378 3084 A
(The)126 3546 A
(block)210 3714 A
3966(is)S
3240 V
(18846)210 648 A
1068(*)S
(always)252 1152 A
1446(on)S
1572(a)S
(click)210 1656 A
(boundary.)378 1908 A
(This)168 2370 A
(procedure)378 2580 A
3000(is)S
(called)252 3126 A
(when)168 3420 A
(memory)252 3630 A
3924(is)S
3330 V
(18847)210 648 A
1068(*)S
(needed)252 1152 A
(for)126 1446 A
(FORK)168 1614 A
1824(or)S
(EXEC.)210 1950 A
3420 V
(18848)210 648 A
1068(*/)S
3510 V
(18849)210 648 A
3600 V
(18850)210 648 A
(register)336 1110 A
(struct)252 1488 A
(hole)168 1782 A
(*hp,)168 1992 A
(*prev_ptr;)420 2202 A
3690 V
(18851)210 648 A
(phys_clicks)462 1110 A
(old_base;)378 1614 A
3780 V
(18852)210 648 A
3870 V
(18853)210 648 A
1110(hp)S
1236(=)S
(hole_head;)420 1320 A
3960 V
(18854)210 648 A
(while)210 1110 A
((hp)126 1362 A
1530(!=)S
(NIL_HOLE))378 1656 A
2076({)S
4050 V
(18855)210 648 A
1362(if)S
((hp->h_len)420 1488 A
1950(>=)S
(clicks))294 2076 A
2412({)S
4140 V
(18856)210 648 A
1698(/*)S
1824(We)S
(found)210 1950 A
2202(a)S
(hole)168 2286 A
(that)168 2496 A
2706(is)S
(big)126 2832 A
(enough.)294 3000 A
(Use)126 3378 A
(it.)126 3546 A
3714(*/)S
4230 V
(18857)210 648 A
(old_base)336 1698 A
2076(=)S
(hp->h_base;)462 2160 A
2706(/*)S
(remember)336 2832 A
(where)210 3210 A
3462(it)S
(started)294 3588 A
3924(*/)S
4320 V
(18858)210 648 A
(hp->h_base)420 1698 A
2160(+=)S
(clicks;)294 2286 A
2706(/*)S
(bite)168 2832 A
3042(a)S
(piece)210 3126 A
(off)126 3378 A
3546(*/)S
4410 V
(18859)210 648 A
(hp->h_len)378 1698 A
2118(-=)S
(clicks;)294 2244 A
2706(/*)S
(ditto)210 2832 A
3084(*/)S
4500 V
(18860)210 648 A
4590 V
(18861)210 648 A
1698(/*)S
1824(If)S
(hole)168 1950 A
2160(is)S
(only)168 2286 A
(partly)252 2496 A
(used,)210 2790 A
(reduce)252 3042 A
(size)168 3336 A
(and)126 3546 A
(return.)294 3714 A
4050(*/)S
4680 V
(18862)210 648 A
1698(if)S
((hp->h_len)420 1824 A
2286(!=)S
2412(0))S
(return(old_base);)714 2538 A
4770 V
(18863)210 648 A
4860 V
(18864)210 648 A
1698(/*)S
(The)126 1824 A
(entire)252 1992 A
(hole)168 2286 A
(has)126 2496 A
(been)168 2664 A
(used)168 2874 A
(up.)126 3084 A
(Manipulate)420 3294 A
(free)168 3756 A
(list.)210 3966 A
4218(*/)S
4950 V
(18865)210 648 A
(del_slot(prev_ptr,)756 1698 A
(hp);)168 2496 A
5040 V
(18866)210 648 A
(return(old_base);)714 1698 A
5130 V
(18867)210 648 A
1362(})S
5220 V
(18868)210 648 A
5310 V
(18869)210 648 A
(prev_ptr)336 1362 A
1740(=)S
(hp;)126 1824 A
5400 V
(18870)210 648 A
1362(hp)S
1488(=)S
(hp->h_next;)462 1572 A
5490 V
(18871)210 648 A
1110(})S
5580 V
(18872)210 648 A
(return(NO_MEM);)630 1110 A
5670 V
(18873)210 648 A
1026(})S
5940 V
(18876)210 648 A
(/*===========================================================================*)3276 1026 A
6030 V
(18877)210 648 A
1068(*)S
(free_mem)336 2370 A
4260(*)S
6120 V
(18878)210 648 A
(*===========================================================================*/)3276 1068 A
6210 V
(18879)210 648 A
(PUBLIC)252 1026 A
(void)168 1320 A
(free_mem(base,)588 1530 A
(clicks))294 2160 A
8418 V
EP
%%Page: 263 263
BP
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630 V
10 R
648(MINIX)S
976(SOURCE)S
1399(CODE)S
11 R
2092(File:)S
2325(src/mm/alloc.c)S
12 B
(263)180 4248 A
900 V
7 LST
(18880)210 648 A
(phys_clicks)462 1026 A
(base;)210 1530 A
2370(/*)S
(base)168 2496 A
(address)294 2706 A
3042(of)S
(block)210 3168 A
3420(to)S
(free)168 3546 A
3756(*/)S
990 V
(18881)210 648 A
(phys_clicks)462 1026 A
(clicks;)294 1530 A
2370(/*)S
(number)252 2496 A
2790(of)S
(clicks)252 2916 A
3210(to)S
(free)168 3336 A
3546(*/)S
1080 V
(18882)210 648 A
1026({)S
1170 V
(18883)210 648 A
1026(/*)S
(Return)252 1152 A
1446(a)S
(block)210 1530 A
1782(of)S
(free)168 1908 A
(memory)252 2118 A
2412(to)S
(the)126 2538 A
(hole)168 2706 A
(list.)210 2916 A
(The)126 3210 A
(parameters)420 3378 A
(tell)168 3840 A
(where)210 4050 A
1260 V
(18884)210 648 A
1068(*)S
(the)126 1152 A
(block)210 1320 A
(starts)252 1572 A
1866(in)S
(physical)336 1992 A
(memory)252 2370 A
(and)126 2664 A
(how)126 2832 A
(big)126 3000 A
3168(it)S
(is.)126 3294 A
(The)126 3504 A
(block)210 3672 A
3924(is)S
(added)210 4050 A
1350 V
(18885)210 648 A
1068(*)S
1152(to)S
(the)126 1278 A
(hole)168 1446 A
(list.)210 1656 A
1950(If)S
2076(it)S
2202(is)S
(contiguous)420 2328 A
(with)168 2790 A
3000(an)S
(existing)336 3126 A
(hole)168 3504 A
3714(on)S
(either)252 3840 A
(end,)168 4134 A
1440 V
(18886)210 648 A
1068(*)S
1152(it)S
1278(is)S
(merged)252 1404 A
(with)168 1698 A
(the)126 1908 A
(hole)168 2076 A
2286(or)S
(holes.)252 2412 A
1530 V
(18887)210 648 A
1068(*/)S
1620 V
(18888)210 648 A
1710 V
(18889)210 648 A
(register)336 1110 A
(struct)252 1488 A
(hole)168 1782 A
(*hp,)168 1992 A
(*new_ptr,)378 2202 A
(*prev_ptr;)420 2622 A
1800 V
(18890)210 648 A
1890 V
(18891)210 648 A
1110(if)S
((clicks)294 1236 A
1572(==)S
1698(0))S
(return;)294 1824 A
1980 V
(18892)210 648 A
1110(if)S
1236(()S
((new_ptr)336 1320 A
1698(=)S
(free_slots))462 1782 A
2286(==)S
(NIL_HOLE))378 2412 A
(panic("Hole)462 2832 A
(table)210 3336 A
(full",)252 3588 A
(NO_NUM);)336 3882 A
2070 V
(18893)210 648 A
(new_ptr->h_base)630 1110 A
1782(=)S
(base;)210 1866 A
2160 V
(18894)210 648 A
(new_ptr->h_len)588 1110 A
1740(=)S
(clicks;)294 1824 A
2250 V
(18895)210 648 A
(free_slots)420 1110 A
1572(=)S
(new_ptr->h_next;)672 1656 A
2340 V
(18896)210 648 A
1110(hp)S
1236(=)S
(hole_head;)420 1320 A
2430 V
(18897)210 648 A
2520 V
(18898)210 648 A
1110(/*)S
1236(If)S
(this)168 1362 A
(block's)294 1572 A
(address)294 1908 A
2244(is)S
(numerically)462 2370 A
(less)168 2874 A
(than)168 3084 A
(the)126 3294 A
(lowest)252 3462 A
(hole)168 3756 A
(currently)378 3966 A
2610 V
(18899)210 648 A
1152(*)S
(available,)420 1236 A
1698(or)S
1824(if)S
1950(no)S
(holes)210 2076 A
(are)126 2328 A
(currently)378 2496 A
(available,)420 2916 A
(put)126 3378 A
(this)168 3546 A
(hole)168 3756 A
3966(on)S
(the)126 4092 A
2700 V
(18900)210 648 A
1152(*)S
(front)210 1236 A
1488(of)S
(the)126 1614 A
(hole)168 1782 A
(list.)210 1992 A
2790 V
(18901)210 648 A
1152(*/)S
2880 V
(18902)210 648 A
1110(if)S
((hp)126 1236 A
1404(==)S
(NIL_HOLE)336 1530 A
1908(||)S
(base)168 2034 A
2244(<=)S
(hp->h_base))462 2370 A