LXR linux/arch/mips/kernel/binfmt

   1/*
   2 * Support for o32 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 int 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 elfo32_check_arch
  35
  36#ifdef CONFIG_KVM_GUEST
  37#define TASK32_SIZE             0x3fff8000UL
  38#else
  39#define TASK32_SIZE             0x7fff8000UL
  40#endif
  41#undef ELF_ET_DYN_BASE
  42#define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)
  43
  44#include <asm/processor.h>
  45
  46#include <linux/elfcore.h>
  47#include <linux/compat.h>
  48#include <linux/math64.h>
  49
  50#define elf_prstatus elf_prstatus32
  51struct elf_prstatus32
  52{
  53        struct elf_siginfo pr_info;     /* Info associated with signal */
  54        short   pr_cursig;              /* Current signal */
  55        unsigned int pr_sigpend;        /* Set of pending signals */
  56        unsigned int pr_sighold;        /* Set of held signals */
  57        pid_t   pr_pid;
  58        pid_t   pr_ppid;
  59        pid_t   pr_pgrp;
  60        pid_t   pr_sid;
  61        struct compat_timeval pr_utime; /* User time */
  62        struct compat_timeval pr_stime; /* System time */
  63        struct compat_timeval pr_cutime;/* Cumulative user time */
  64        struct compat_timeval pr_cstime;/* Cumulative system time */
  65        elf_gregset_t pr_reg;   /* GP registers */
  66        int pr_fpvalid;         /* True if math co-processor being used.  */
  67};
  68
  69#define elf_prpsinfo elf_prpsinfo32
  70struct elf_prpsinfo32
  71{
  72        char    pr_state;       /* numeric process state */
  73        char    pr_sname;       /* char for pr_state */
  74        char    pr_zomb;        /* zombie */
  75        char    pr_nice;        /* nice val */
  76        unsigned int pr_flag;   /* flags */
  77        __kernel_uid_t  pr_uid;
  78        __kernel_gid_t  pr_gid;
  79        pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  80        /* Lots missing */
  81        char    pr_fname[16];   /* filename of executable */
  82        char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  83};
  84
  85#define elf_caddr_t     u32
  86#define init_elf_binfmt init_elf32_binfmt
  87
  88#define jiffies_to_timeval jiffies_to_compat_timeval
  89static inline void
  90jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
  91{
  92        /*
  93         * Convert jiffies to nanoseconds and separate with
  94         * one divide.
  95         */
  96        u64 nsec = (u64)jiffies * TICK_NSEC;
  97        u32 rem;
  98        value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
  99        value->tv_usec = rem / NSEC_PER_USEC;
 100}
 101
 102#undef TASK_SIZE
 103#define TASK_SIZE TASK_SIZE32
 104
 105#undef cputime_to_timeval
 106#define cputime_to_timeval cputime_to_compat_timeval
 107static __inline__ void
 108cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
 109{
 110        unsigned long jiffies = cputime_to_jiffies(cputime);
 111
 112        value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 113        value->tv_sec = jiffies / HZ;
 114}
 115
 116#include "../../../fs/binfmt_elf.c"
 117