binfmt_elf32.c
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上传日期:2013-02-24
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- /*
- * Support for 32-bit Linux for S390 ELF binaries.
- *
- * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Gerhard Tonn (ton@de.ibm.com)
- *
- * Heavily inspired by the 32-bit Sparc compat code which is
- * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
- * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz)
- */
- #define __ASMS390_ELF_H
- /*
- * These are used to set parameters in the core dumps.
- */
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2MSB
- #define ELF_ARCH EM_S390
- /*
- * This is used to ensure we don't load something for the wrong architecture.
- */
- #define elf_check_arch(x)
- (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD)
- && (x)->e_ident[EI_CLASS] == ELF_CLASS)
- /* ELF register definitions */
- #define NUM_GPRS 16
- #define NUM_FPRS 16
- #define NUM_ACRS 16
- #define TASK31_SIZE (0x80000000UL)
- /* For SVR4/S390 the function pointer to be registered with `atexit` is
- passed in R14. */
- #define ELF_PLAT_INIT(_r)
- do {
- _r->gprs[14] = 0;
- current->thread.flags |= S390_FLAG_31BIT;
- } while(0)
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
- use of this is to invoke "./ld.so someprog" to test out a new version of
- the loader. We need to make sure that it is out of the way of the program
- that it will "exec", and that there is sufficient room for the brk. */
- #define ELF_ET_DYN_BASE ((TASK31_SIZE & 0x80000000)
- ? TASK31_SIZE / 3 * 2
- : 2 * TASK31_SIZE / 3)
- /* Wow, the "main" arch needs arch dependent functions too.. :) */
- /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
- now struct_user_regs, they are different) */
- #define ELF_CORE_COPY_REGS(pr_reg, regs)
- {
- int i;
- memcpy(&pr_reg.psw.mask, ®s->psw.mask, 4);
- memcpy(&pr_reg.psw.addr, ((char*)®s->psw.addr)+4, 4);
- for(i=0; i<NUM_GPRS; i++)
- pr_reg.gprs[i] = regs->gprs[i];
- for(i=0; i<NUM_ACRS; i++)
- pr_reg.acrs[i] = regs->acrs[i];
- pr_reg.orig_gpr2 = regs->orig_gpr2;
- }
- /* This yields a mask that user programs can use to figure out what
- instruction set this CPU supports. */
- #define ELF_HWCAP (0)
- /* This yields a string that ld.so will use to load implementation
- specific libraries for optimization. This is more specific in
- intent than poking at uname or /proc/cpuinfo.
- For the moment, we have only optimizations for the Intel generations,
- but that could change... */
- #define ELF_PLATFORM (NULL)
- #ifdef __KERNEL__
- #define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
- #endif
- #include "linux32.h"
- typedef _s390_fp_regs32 elf_fpregset_t;
- typedef struct
- {
-
- _psw_t32 psw;
- __u32 gprs[__NUM_GPRS];
- __u32 acrs[__NUM_ACRS];
- __u32 orig_gpr2;
- } s390_regs32;
- typedef s390_regs32 elf_gregset_t;
- #include <asm/processor.h>
- #include <linux/module.h>
- #include <linux/config.h>
- #include <linux/elfcore.h>
- int setup_arg_pages32(struct linux_binprm *bprm);
- struct timeval32
- {
- int tv_sec, tv_usec;
- };
- #define elf_prstatus elf_prstatus32
- struct elf_prstatus32
- {
- struct elf_siginfo pr_info; /* Info associated with signal */
- short pr_cursig; /* Current signal */
- u32 pr_sigpend; /* Set of pending signals */
- u32 pr_sighold; /* Set of held signals */
- pid_t pr_pid;
- pid_t pr_ppid;
- pid_t pr_pgrp;
- pid_t pr_sid;
- struct timeval32 pr_utime; /* User time */
- struct timeval32 pr_stime; /* System time */
- struct timeval32 pr_cutime; /* Cumulative user time */
- struct timeval32 pr_cstime; /* Cumulative system time */
- elf_gregset_t pr_reg; /* GP registers */
- int pr_fpvalid; /* True if math co-processor being used. */
- };
- #define elf_prpsinfo elf_prpsinfo32
- struct elf_prpsinfo32
- {
- char pr_state; /* numeric process state */
- char pr_sname; /* char for pr_state */
- char pr_zomb; /* zombie */
- char pr_nice; /* nice val */
- u32 pr_flag; /* flags */
- u16 pr_uid;
- u16 pr_gid;
- pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
- /* Lots missing */
- char pr_fname[16]; /* filename of executable */
- char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
- };
- #include <linux/highuid.h>
- #undef NEW_TO_OLD_UID
- #undef NEW_TO_OLD_GID
- #define NEW_TO_OLD_UID(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
- #define NEW_TO_OLD_GID(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
- #define elf_addr_t u32
- #define elf_caddr_t u32
- /*
- #define init_elf_binfmt init_elf32_binfmt
- */
- #undef CONFIG_BINFMT_ELF
- #ifdef CONFIG_BINFMT_ELF32
- #define CONFIG_BINFMT_ELF CONFIG_BINFMT_ELF32
- #endif
- #undef CONFIG_BINFMT_ELF_MODULE
- #ifdef CONFIG_BINFMT_ELF32_MODULE
- #define CONFIG_BINFMT_ELF_MODULE CONFIG_BINFMT_ELF32_MODULE
- #endif
- #undef start_thread
- #define start_thread start_thread31
- #define setup_arg_pages(bprm) setup_arg_pages32(bprm)
- #define elf_map elf_map32
- MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit Linux for S390 binaries,"
- " Copyright 2000 IBM Corporation");
- MODULE_AUTHOR("Gerhard Tonn <ton@de.ibm.com>");
- #undef MODULE_DESCRIPTION
- #undef MODULE_AUTHOR
- #include "../../../fs/binfmt_elf.c"
- static unsigned long
- elf_map32 (struct file *filep, unsigned long addr, struct elf_phdr *eppnt, int prot, int type)
- {
- unsigned long map_addr;
- if(!addr)
- addr = 0x40000000;
- down_write(¤t->mm->mmap_sem);
- map_addr = do_mmap(filep, ELF_PAGESTART(addr),
- eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr), prot, type,
- eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr));
- up_write(¤t->mm->mmap_sem);
- return(map_addr);
- }