LXR linux/arch/mips/kernel/binfmt

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Support for n32 Linux/MIPS ELF binaries.
   4 * Author: Ralf Baechle (ralf@linux-mips.org)
   5 *
   6 * Copyright (C) 1999, 2001 Ralf Baechle
   7 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
   8 *
   9 * Heavily inspired by the 32-bit Sparc compat code which is
  10 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
  11 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek   (jj@ultra.linux.cz)
  12 */
  13
  14#define ELF_ARCH                EM_MIPS
  15#define ELF_CLASS               ELFCLASS32
  16#ifdef __MIPSEB__
  17#define ELF_DATA                ELFDATA2MSB;
  18#else /* __MIPSEL__ */
  19#define ELF_DATA                ELFDATA2LSB;
  20#endif
  21
  22/* ELF register definitions */
  23#define ELF_NGREG       45
  24#define ELF_NFPREG      33
  25
  26typedef unsigned long elf_greg_t;
  27typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  28
  29typedef double elf_fpreg_t;
  30typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  31
  32/*
  33 * This is used to ensure we don't load something for the wrong architecture.
  34 */
  35#define elf_check_arch elfn32_check_arch
  36
  37#define TASK32_SIZE             0x7fff8000UL
  38#undef ELF_ET_DYN_BASE
  39#define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)
  40
  41#include <asm/processor.h>
  42#include <linux/elfcore.h>
  43#include <linux/compat.h>
  44#include <linux/math64.h>
  45
  46#define elf_prstatus elf_prstatus32
  47struct elf_prstatus32
  48{
  49        struct elf_siginfo pr_info;     /* Info associated with signal */
  50        short   pr_cursig;              /* Current signal */
  51        unsigned int pr_sigpend;        /* Set of pending signals */
  52        unsigned int pr_sighold;        /* Set of held signals */
  53        pid_t   pr_pid;
  54        pid_t   pr_ppid;
  55        pid_t   pr_pgrp;
  56        pid_t   pr_sid;
  57        struct old_timeval32 pr_utime; /* User time */
  58        struct old_timeval32 pr_stime; /* System time */
  59        struct old_timeval32 pr_cutime;/* Cumulative user time */
  60        struct old_timeval32 pr_cstime;/* Cumulative system time */
  61        elf_gregset_t pr_reg;   /* GP registers */
  62        int pr_fpvalid;         /* True if math co-processor being used.  */
  63};
  64
  65#define elf_prpsinfo elf_prpsinfo32
  66struct elf_prpsinfo32
  67{
  68        char    pr_state;       /* numeric process state */
  69        char    pr_sname;       /* char for pr_state */
  70        char    pr_zomb;        /* zombie */
  71        char    pr_nice;        /* nice val */
  72        unsigned int pr_flag;   /* flags */
  73        __kernel_uid_t  pr_uid;
  74        __kernel_gid_t  pr_gid;
  75        pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  76        /* Lots missing */
  77        char    pr_fname[16];   /* filename of executable */
  78        char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  79};
  80
  81#define elf_caddr_t     u32
  82#define init_elf_binfmt init_elfn32_binfmt
  83
  84#define jiffies_to_timeval jiffies_to_old_timeval32
  85static __inline__ void
  86jiffies_to_old_timeval32(unsigned long jiffies, struct old_timeval32 *value)
  87{
  88        /*
  89         * Convert jiffies to nanoseconds and separate with
  90         * one divide.
  91         */
  92        u64 nsec = (u64)jiffies * TICK_NSEC;
  93        u32 rem;
  94        value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
  95        value->tv_usec = rem / NSEC_PER_USEC;
  96}
  97
  98#define ELF_CORE_EFLAGS EF_MIPS_ABI2
  99
 100#undef TASK_SIZE
 101#define TASK_SIZE TASK_SIZE32
 102
 103#undef ns_to_timeval
 104#define ns_to_timeval ns_to_old_timeval32
 105
 106#include "../../../fs/binfmt_elf.c"
 107