binfmt_elf32.c

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/*
 * Support for 32-bit Linux/Parisc ELF binaries on 64 bit kernels
 *
 * Copyright (C) 2000 John Marvin
 * Copyright (C) 2000 Hewlett Packard Co.
 *
 * Heavily inspired from various other efforts to do the same thing
 * (ia64,sparc64/mips64)
 */

/* Make sure include/asm-parisc/elf.h does the right thing */

#define ELF_CLASS   ELFCLASS32

#define ELF_CORE_COPY_REGS(dst, pt) \
    memset(dst, 0, sizeof(dst));    /* don't leak any "random" bits */ \
    {   int i; \
        for (i = 0; i < 32; i++) dst[i] = (elf_greg_t) pt->gr[i]; \
        for (i = 0; i < 8; i++) dst[32 + i] = (elf_greg_t) pt->sr[i]; \
    } \
    dst[40] = (elf_greg_t) pt->iaoq[0]; dst[41] = (elf_greg_t) pt->iaoq[1]; \
    dst[42] = (elf_greg_t) pt->iasq[0]; dst[43] = (elf_greg_t) pt->iasq[1]; \
    dst[44] = (elf_greg_t) pt->sar;   dst[45] = (elf_greg_t) pt->iir; \
    dst[46] = (elf_greg_t) pt->isr;   dst[47] = (elf_greg_t) pt->ior; \
    dst[48] = (elf_greg_t) mfctl(22); dst[49] = (elf_greg_t) mfctl(0); \
    dst[50] = (elf_greg_t) mfctl(24); dst[51] = (elf_greg_t) mfctl(25); \
    dst[52] = (elf_greg_t) mfctl(26); dst[53] = (elf_greg_t) mfctl(27); \
    dst[54] = (elf_greg_t) mfctl(28); dst[55] = (elf_greg_t) mfctl(29); \
    dst[56] = (elf_greg_t) mfctl(30); dst[57] = (elf_greg_t) mfctl(31); \
    dst[58] = (elf_greg_t) mfctl( 8); dst[59] = (elf_greg_t) mfctl( 9); \
    dst[60] = (elf_greg_t) mfctl(12); dst[61] = (elf_greg_t) mfctl(13); \
    dst[62] = (elf_greg_t) mfctl(10); dst[63] = (elf_greg_t) mfctl(15);


typedef unsigned int elf_greg_t;

#include <linux/spinlock.h>
#include <asm/processor.h>
#include <linux/module.h>
#include <linux/elfcore.h>
#include <linux/compat.h>       /* struct compat_timeval */

#define elf_prstatus elf_prstatus32
struct elf_prstatus32
{
    struct elf_siginfo pr_info; /* Info associated with signal */
    short   pr_cursig;      /* Current signal */
    unsigned int pr_sigpend;    /* Set of pending signals */
    unsigned int pr_sighold;    /* Set of held signals */
    pid_t   pr_pid;
    pid_t   pr_ppid;
    pid_t   pr_pgrp;
    pid_t   pr_sid;
    struct compat_timeval pr_utime;     /* User time */
    struct compat_timeval pr_stime;     /* System time */
    struct compat_timeval pr_cutime;    /* Cumulative user time */
    struct compat_timeval 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 */
    unsigned int 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 */
};

#define init_elf_binfmt init_elf32_binfmt

#define ELF_PLATFORM  ("PARISC32\0")

/*
 * We should probably use this macro to set a flag somewhere to indicate
 * this is a 32 on 64 process. We could use PER_LINUX_32BIT, or we
 * could set a processor dependent flag in the thread_struct.
 */

#define SET_PERSONALITY(ex) \
    set_thread_flag(TIF_32BIT); \
    current->thread.map_base = DEFAULT_MAP_BASE32; \
    current->thread.task_size = DEFAULT_TASK_SIZE32 \

#undef cputime_to_timeval
#define cputime_to_timeval cputime_to_compat_timeval
static __inline__ void
cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
{
    unsigned long jiffies = cputime_to_jiffies(cputime);
    value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
    value->tv_sec = jiffies / HZ;
}

#include "../../../fs/binfmt_elf.c"