Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * Support for o32 Linux/MIPS ELF binaries.

 *

 * Copyright (C) 1999, 2001 Ralf Baechle

 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.

 *

 * 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 ELF_ARCH                EM_MIPS

#define ELF_CLASS               ELFCLASS32

#ifdef __MIPSEB__

#define ELF_DATA                ELFDATA2MSB;

#else /* __MIPSEL__ */

#define ELF_DATA                ELFDATA2LSB;

#endif

/* ELF register definitions */

#define ELF_NGREG       45

#define ELF_NFPREG      33

typedef unsigned int elf_greg_t;

typedef elf_greg_t elf_gregset_t[ELF_NGREG];

typedef double elf_fpreg_t;

typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];

/*

 * This is used to ensure we don't load something for the wrong architecture.

 */

#define elf_check_arch(hdr)                                             \

({                                                                      \

        int __res = 1;                                                  \

        struct elfhdr *__h = (hdr);                                     \

                                                                        \

        if (__h->e_machine != EM_MIPS)                                  \

                __res = 0;                                               \

        if (__h->e_ident[EI_CLASS] != ELFCLASS32)                       \

                __res = 0;                                               \

        if ((__h->e_flags & EF_MIPS_ABI2) != 0)                          \

                __res = 0;                                               \

        if (((__h->e_flags & EF_MIPS_ABI) != 0) &&                       \

            ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))          \

                __res = 0;                                               \

                                                                        \

        __res;                                                          \

})

#define TASK32_SIZE             0x7fff8000UL

#undef ELF_ET_DYN_BASE

#define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)

#include <asm/processor.h>

#include <linux/module.h>

#include <linux/elfcore.h>

#include <linux/compat.h>

#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 */

        __kernel_uid_t  pr_uid;

        __kernel_gid_t  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 elf_caddr_t     u32

#define init_elf_binfmt init_elf32_binfmt

#define jiffies_to_timeval jiffies_to_compat_timeval

static inline void

jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)

{

        /*

         * Convert jiffies to nanoseconds and seperate with

         * one divide.

         */

        u64 nsec = (u64)jiffies * TICK_NSEC;

        long rem;

        value->tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &rem);

        value->tv_usec = rem / NSEC_PER_USEC;

}

#undef ELF_CORE_COPY_REGS

#define ELF_CORE_COPY_REGS(_dest, _regs) elf32_core_copy_regs(_dest, _regs);

void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs)

{

        int i;

        for (i = 0; i < EF_R0; i++)

                grp[i] = 0;

        grp[EF_R0] = 0;

        for (i = 1; i <= 31; i++)

                grp[EF_R0 + i] = (elf_greg_t) regs->regs[i];

        grp[EF_R26] = 0;

        grp[EF_R27] = 0;

        grp[EF_LO] = (elf_greg_t) regs->lo;

        grp[EF_HI] = (elf_greg_t) regs->hi;

        grp[EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;

        grp[EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;

        grp[EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;

        grp[EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;

#ifdef EF_UNUSED0

        grp[EF_UNUSED0] = 0;

#endif

}

MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries");

MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)");

#undef MODULE_DESCRIPTION

#undef MODULE_AUTHOR

#undef TASK_SIZE

#define TASK_SIZE TASK_SIZE32

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