sys32.S
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上传日期:2013-04-10
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文件大小:6k
- /*
- * sys32.S: I-cache tricks for 32-bit compatability layer simple
- * conversions.
- *
- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
- * Copyright (C) 2000 Ken Aaker (kdaaker@rchland.vnet.ibm.com)
- * For PPC ABI convention is parms in Regs 3-10.
- * The router in entry.S clears the high 32 bits in the first
- * 4 arguments (R3-R6).
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include "ppc_asm.h"
- #include <asm/errno.h>
- #include <asm/processor.h>
- /* NOTE: call as jump breaks return stack, we have to avoid that */
- .text
- _GLOBAL(sys32_mmap)
- clrldi r7, r7, 32 /* int fd parm */
- clrldi r8, r8, 32 /* off_t offset parm */
- b .sys_mmap
- _GLOBAL(sys32_lseek)
- extsw r4,r4 /* sign extend off_t offset parm */
- b .sys_lseek
- _GLOBAL(sys32_chmod)
- /* Ken Aaker.. hmmm maybe I don't need to do anything here */
- b .sys_chmod
- _GLOBAL(sys32_mknod)
- /* Ken Aaker.. hmmm maybe I don't need to do anything here */
- b .sys_mknod
- _GLOBAL(sys32_sendto)
- clrldi r7, r7, 32 /* struct sockaddr *addr parm */
- clrldi r8, r8, 32 /* int addr_len parm */
- b .sys_sendto
- _GLOBAL(sys32_recvfrom)
- clrldi r7, r7, 32 /* struct sockaddr *addr parm */
- clrldi r8, r8, 32 /* int *addr_len parm */
- b .sys_recvfrom
- _GLOBAL(sys32_getsockopt)
- clrldi r7, r7, 32 /* int *optlen parm */
- b .sys_getsockopt
- _GLOBAL(sys32_bdflush)
- extsw r4,r4 /* sign extend long data parm */
- b .sys_bdflush
- _GLOBAL(sys32_mmap2)
- clrldi r7, r7, 32 /* unsigned long fd parm */
- extsw r8, r8 /* off_t offset */
- b .sys_mmap
- _GLOBAL(sys32_socketcall) /* r3=call, r4=args */
- cmpwi r3, 1
- blt- .do_einval
- cmpwi r3, 17
- bgt- .do_einval
- subi r3, r3, 1 /* index into socketcall_table vectors and jmp */
- sldi r3, r3, 3 /* each entry is 8 bytes */
- LOADADDR(r10,.socketcall_table_begin)
- ldx r10, r10, r3
- mtctr r10
- bctr
- /* Socket function vectored fix ups for 32 bit */
- _STATIC(do_sys_socket) /* sys_socket(int, int, int) */
- mr r10,r4
- lwa r3,0(r10)
- lwa r4,4(r10)
- lwa r5,8(r10)
- b .sys_socket
- _STATIC(do_sys_bind) /* sys_bind(int fd, struct sockaddr *, int) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwa r5,8(r10)
- b .sys_bind
- _STATIC(do_sys_connect) /* sys_connect(int, struct sockaddr *, int) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwa r5,8(r10)
- b .sys_connect
- _STATIC(do_sys_listen) /* sys_listen(int, int) */
- mr r10,r4
- lwa r3,0(r10)
- lwa r4,4(r10)
- b .sys_listen
- _STATIC(do_sys_accept) /* sys_accept(int, struct sockaddr *, int *) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwz r5,8(r10)
- b .sys_accept
- _STATIC(do_sys_getsockname) /* sys_getsockname(int, struct sockaddr *, int *) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwz r5,8(r10)
- b .sys_getsockname
- _STATIC(do_sys_getpeername) /* sys_getpeername(int, struct sockaddr *, int *) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwz r5,8(r10)
- b .sys_getpeername
- _STATIC(do_sys_socketpair) /* sys_socketpair(int, int, int, int *) */
- mr r10,r4
- lwa r3,0(r10)
- lwa r4,4(r10)
- lwa r5,8(r10)
- lwz r6,12(r10)
- b .sys_socketpair
- _STATIC(do_sys_send) /* sys_send(int, void *, size_t, unsigned int) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwz r5,8(r10)
- lwz r6,12(r10)
- b .sys_send
- _STATIC(do_sys_recv) /* sys_recv(int, void *, size_t, unsigned int) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwz r5,8(r10)
- lwz r6,12(r10)
- b .sys_recv
- _STATIC(do_sys_sendto) /* sys32_sendto(int, u32, __kernel_size_t32, unsigned int, u32, int) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwz r5,8(r10)
- lwz r6,12(r10)
- lwz r7,16(r10)
- lwa r8,20(r10)
- b .sys32_sendto
- _STATIC(do_sys_recvfrom) /* sys32_recvfrom(int, u32, __kernel_size_t32, unsigned int, u32, u32) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwz r5,8(r10)
- lwz r6,12(r10)
- lwz r7,16(r10)
- lwz r8,20(r10)
- b .sys32_recvfrom
- _STATIC(do_sys_shutdown) /* sys_shutdown(int, int) */
- mr r10,r4
- lwa r3,0(r10)
- lwa r4,4(r10)
- b .sys_shutdown
- _STATIC(do_sys_setsockopt) /* sys32_setsockopt(int, int, int, char *, int) */
- mr r10,r4
- lwa r3,0(r10)
- lwa r4,4(r10)
- lwa r5,8(r10)
- lwz r6,12(r10)
- lwa r7,16(r10)
- b .sys32_setsockopt
- _STATIC(do_sys_getsockopt) /* sys32_getsockopt(int, int, int, u32, u32) */
- mr r10,r4
- lwa r3,0(r10)
- lwa r4,4(r10)
- lwa r5,8(r10)
- lwz r6,12(r10)
- lwz r7,16(r10)
- b .sys32_getsockopt
- _STATIC(do_sys_sendmsg) /* sys32_sendmsg(int, struct msghdr32 *, unsigned int) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwa r5,8(r10)
- b .sys32_sendmsg
- _STATIC(do_sys_recvmsg) /* sys32_recvmsg(int, struct msghdr32 *, unsigned int) */
- mr r10,r4
- lwa r3,0(r10)
- lwz r4,4(r10)
- lwa r5,8(r10)
- b .sys32_recvmsg
- _STATIC(do_einval)
- li r3,-EINVAL
- b .ret_from_syscall_1
- _STATIC(do_efault)
- li r3,-EFAULT
- b .ret_from_syscall_1
- .data
- .align 8
- _GLOBAL(socketcall_table_begin)
- .llong .do_sys_socket
- .llong .do_sys_bind
- .llong .do_sys_connect
- .llong .do_sys_listen
- .llong .do_sys_accept
- .llong .do_sys_getsockname
- .llong .do_sys_getpeername
- .llong .do_sys_socketpair
- .llong .do_sys_send
- .llong .do_sys_recv
- .llong .do_sys_sendto
- .llong .do_sys_recvfrom
- .llong .do_sys_shutdown
- .llong .do_sys_setsockopt
- .llong .do_sys_getsockopt
- .llong .do_sys_sendmsg
- .llong .do_sys_recvmsg
- _GLOBAL(socketcall_table_end)
- .section __ex_table,"a"
- .align 3
- .llong .socketcall_table_begin
- .llong 0
- .llong .socketcall_table_end
- .llong .do_efault
- .previous