LXR linux/arch/mips/kernel/binfmt

   1/*
   2 * Support for n32 Linux/MIPS ELF binaries.
   3 * Author: Ralf Baechle (ralf@linux-mips.org)
   4 *
   5 * Copyright (C) 1999, 2001 Ralf Baechle
   6 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
   7 *
   8 * Heavily inspired by the 32-bit Sparc compat code which is
   9 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
  10 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek   (jj@ultra.linux.cz)
  11 */
  12
  13#define ELF_ARCH                EM_MIPS
  14#define ELF_CLASS               ELFCLASS32
  15#ifdef __MIPSEB__
  16#define ELF_DATA                ELFDATA2MSB;
  17#else /* __MIPSEL__ */
  18#define ELF_DATA                ELFDATA2LSB;
  19#endif
  20
  21/* ELF register definitions */
  22#define ELF_NGREG       45
  23#define ELF_NFPREG      33
  24
  25typedef unsigned long elf_greg_t;
  26typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  27
  28typedef double elf_fpreg_t;
  29typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  30
  31/*
  32 * This is used to ensure we don't load something for the wrong architecture.
  33 */
  34#define elf_check_arch elfn32_check_arch
  35
  36#define TASK32_SIZE             0x7fff8000UL
  37#undef ELF_ET_DYN_BASE
  38#define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)
  39
  40#include <asm/processor.h>
  41#include <linux/elfcore.h>
  42#include <linux/compat.h>
  43#include <linux/math64.h>
  44
  45#define elf_prstatus elf_prstatus32
  46struct elf_prstatus32
  47{
  48        struct elf_siginfo pr_info;     /* Info associated with signal */
  49        short   pr_cursig;              /* Current signal */
  50        unsigned int pr_sigpend;        /* Set of pending signals */
  51        unsigned int pr_sighold;        /* Set of held signals */
  52        pid_t   pr_pid;
  53        pid_t   pr_ppid;
  54        pid_t   pr_pgrp;
  55        pid_t   pr_sid;
  56        struct compat_timeval pr_utime; /* User time */
  57        struct compat_timeval pr_stime; /* System time */
  58        struct compat_timeval pr_cutime;/* Cumulative user time */
  59        struct compat_timeval pr_cstime;/* Cumulative system time */
  60        elf_gregset_t pr_reg;   /* GP registers */
  61        int pr_fpvalid;         /* True if math co-processor being used.  */
  62};
  63
  64#define elf_prpsinfo elf_prpsinfo32
  65struct elf_prpsinfo32
  66{
  67        char    pr_state;       /* numeric process state */
  68        char    pr_sname;       /* char for pr_state */
  69        char    pr_zomb;        /* zombie */
  70        char    pr_nice;        /* nice val */
  71        unsigned int pr_flag;   /* flags */
  72        __kernel_uid_t  pr_uid;
  73        __kernel_gid_t  pr_gid;
  74        pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  75        /* Lots missing */
  76        char    pr_fname[16];   /* filename of executable */
  77        char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  78};
  79
  80#define elf_caddr_t     u32
  81#define init_elf_binfmt init_elfn32_binfmt
  82
  83#define jiffies_to_timeval jiffies_to_compat_timeval
  84static __inline__ void
  85jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
  86{
  87        /*
  88         * Convert jiffies to nanoseconds and separate with
  89         * one divide.
  90         */
  91        u64 nsec = (u64)jiffies * TICK_NSEC;
  92        u32 rem;
  93        value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
  94        value->tv_usec = rem / NSEC_PER_USEC;
  95}
  96
  97#define ELF_CORE_EFLAGS EF_MIPS_ABI2
  98
  99#undef TASK_SIZE
 100#define TASK_SIZE TASK_SIZE32
 101
 102#undef cputime_to_timeval
 103#define cputime_to_timeval cputime_to_compat_timeval
 104static __inline__ void
 105cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
 106{
 107        unsigned long jiffies = cputime_to_jiffies(cputime);
 108
 109        value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 110        value->tv_sec = jiffies / HZ;
 111}
 112
 113#include "../../../fs/binfmt_elf.c"
 114