linux/arch/parisc/kernel/binfmt_elf32.c
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   1/*
   2 * Support for 32-bit Linux/Parisc ELF binaries on 64 bit kernels
   3 *
   4 * Copyright (C) 2000 John Marvin
   5 * Copyright (C) 2000 Hewlett Packard Co.
   6 *
   7 * Heavily inspired from various other efforts to do the same thing
   8 * (ia64,sparc64/mips64)
   9 */
  10
  11/* Make sure include/asm-parisc/elf.h does the right thing */
  12
  13#define ELF_CLASS       ELFCLASS32
  14
  15#define ELF_CORE_COPY_REGS(dst, pt)     \
  16        memset(dst, 0, sizeof(dst));    /* don't leak any "random" bits */ \
  17        {       int i; \
  18                for (i = 0; i < 32; i++) dst[i] = (elf_greg_t) pt->gr[i]; \
  19                for (i = 0; i < 8; i++) dst[32 + i] = (elf_greg_t) pt->sr[i]; \
  20        } \
  21        dst[40] = (elf_greg_t) pt->iaoq[0]; dst[41] = (elf_greg_t) pt->iaoq[1]; \
  22        dst[42] = (elf_greg_t) pt->iasq[0]; dst[43] = (elf_greg_t) pt->iasq[1]; \
  23        dst[44] = (elf_greg_t) pt->sar;   dst[45] = (elf_greg_t) pt->iir; \
  24        dst[46] = (elf_greg_t) pt->isr;   dst[47] = (elf_greg_t) pt->ior; \
  25        dst[48] = (elf_greg_t) mfctl(22); dst[49] = (elf_greg_t) mfctl(0); \
  26        dst[50] = (elf_greg_t) mfctl(24); dst[51] = (elf_greg_t) mfctl(25); \
  27        dst[52] = (elf_greg_t) mfctl(26); dst[53] = (elf_greg_t) mfctl(27); \
  28        dst[54] = (elf_greg_t) mfctl(28); dst[55] = (elf_greg_t) mfctl(29); \
  29        dst[56] = (elf_greg_t) mfctl(30); dst[57] = (elf_greg_t) mfctl(31); \
  30        dst[58] = (elf_greg_t) mfctl( 8); dst[59] = (elf_greg_t) mfctl( 9); \
  31        dst[60] = (elf_greg_t) mfctl(12); dst[61] = (elf_greg_t) mfctl(13); \
  32        dst[62] = (elf_greg_t) mfctl(10); dst[63] = (elf_greg_t) mfctl(15);
  33
  34
  35typedef unsigned int elf_greg_t;
  36
  37#include <linux/spinlock.h>
  38#include <asm/processor.h>
  39#include <linux/module.h>
  40#include <linux/elfcore.h>
  41#include <linux/compat.h>               /* struct compat_timeval */
  42
  43#define elf_prstatus elf_prstatus32
  44struct elf_prstatus32
  45{
  46        struct elf_siginfo pr_info;     /* Info associated with signal */
  47        short   pr_cursig;              /* Current signal */
  48        unsigned int pr_sigpend;        /* Set of pending signals */
  49        unsigned int pr_sighold;        /* Set of held signals */
  50        pid_t   pr_pid;
  51        pid_t   pr_ppid;
  52        pid_t   pr_pgrp;
  53        pid_t   pr_sid;
  54        struct compat_timeval pr_utime;         /* User time */
  55        struct compat_timeval pr_stime;         /* System time */
  56        struct compat_timeval pr_cutime;        /* Cumulative user time */
  57        struct compat_timeval pr_cstime;        /* Cumulative system time */
  58        elf_gregset_t pr_reg;   /* GP registers */
  59        int pr_fpvalid;         /* True if math co-processor being used.  */
  60};
  61
  62#define elf_prpsinfo elf_prpsinfo32
  63struct elf_prpsinfo32
  64{
  65        char    pr_state;       /* numeric process state */
  66        char    pr_sname;       /* char for pr_state */
  67        char    pr_zomb;        /* zombie */
  68        char    pr_nice;        /* nice val */
  69        unsigned int pr_flag;   /* flags */
  70        u16     pr_uid;
  71        u16     pr_gid;
  72        pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  73        /* Lots missing */
  74        char    pr_fname[16];   /* filename of executable */
  75        char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  76};
  77
  78#define init_elf_binfmt init_elf32_binfmt
  79
  80#define ELF_PLATFORM  ("PARISC32\0")
  81
  82/*
  83 * We should probably use this macro to set a flag somewhere to indicate
  84 * this is a 32 on 64 process. We could use PER_LINUX_32BIT, or we
  85 * could set a processor dependent flag in the thread_struct.
  86 */
  87
  88#define SET_PERSONALITY(ex) \
  89        set_thread_flag(TIF_32BIT); \
  90        current->thread.map_base = DEFAULT_MAP_BASE32; \
  91        current->thread.task_size = DEFAULT_TASK_SIZE32 \
  92
  93#undef cputime_to_timeval
  94#define cputime_to_timeval cputime_to_compat_timeval
  95static __inline__ void
  96cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
  97{
  98        unsigned long jiffies = cputime_to_jiffies(cputime);
  99        value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 100        value->tv_sec = jiffies / HZ;
 101}
 102
 103#include "../../../fs/binfmt_elf.c"
 104