LXR linux/arch/mips/kernel/binfmt

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Support for o32 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 int 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 elfo32_check_arch
  36
  37#ifdef CONFIG_KVM_GUEST
  38#define TASK32_SIZE             0x3fff8000UL
  39#else
  40#define TASK32_SIZE             0x7fff8000UL
  41#endif
  42#undef ELF_ET_DYN_BASE
  43#define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)
  44
  45#include <asm/processor.h>
  46
  47#include <linux/elfcore.h>
  48#include <linux/compat.h>
  49#include <linux/math64.h>
  50
  51#define elf_prstatus elf_prstatus32
  52struct elf_prstatus32
  53{
  54        struct elf_siginfo pr_info;     /* Info associated with signal */
  55        short   pr_cursig;              /* Current signal */
  56        unsigned int pr_sigpend;        /* Set of pending signals */
  57        unsigned int pr_sighold;        /* Set of held signals */
  58        pid_t   pr_pid;
  59        pid_t   pr_ppid;
  60        pid_t   pr_pgrp;
  61        pid_t   pr_sid;
  62        struct old_timeval32 pr_utime; /* User time */
  63        struct old_timeval32 pr_stime; /* System time */
  64        struct old_timeval32 pr_cutime;/* Cumulative user time */
  65        struct old_timeval32 pr_cstime;/* Cumulative system time */
  66        elf_gregset_t pr_reg;   /* GP registers */
  67        int pr_fpvalid;         /* True if math co-processor being used.  */
  68};
  69
  70#define elf_prpsinfo elf_prpsinfo32
  71struct elf_prpsinfo32
  72{
  73        char    pr_state;       /* numeric process state */
  74        char    pr_sname;       /* char for pr_state */
  75        char    pr_zomb;        /* zombie */
  76        char    pr_nice;        /* nice val */
  77        unsigned int pr_flag;   /* flags */
  78        __kernel_uid_t  pr_uid;
  79        __kernel_gid_t  pr_gid;
  80        pid_t   pr_pid, pr_ppid, pr_pgrp, pr_sid;
  81        /* Lots missing */
  82        char    pr_fname[16];   /* filename of executable */
  83        char    pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
  84};
  85
  86#define elf_caddr_t     u32
  87#define init_elf_binfmt init_elf32_binfmt
  88
  89#define jiffies_to_timeval jiffies_to_old_timeval32
  90static inline void
  91jiffies_to_old_timeval32(unsigned long jiffies, struct old_timeval32 *value)
  92{
  93        /*
  94         * Convert jiffies to nanoseconds and separate with
  95         * one divide.
  96         */
  97        u64 nsec = (u64)jiffies * TICK_NSEC;
  98        u32 rem;
  99        value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
 100        value->tv_usec = rem / NSEC_PER_USEC;
 101}
 102
 103#undef TASK_SIZE
 104#define TASK_SIZE TASK_SIZE32
 105
 106#undef ns_to_kernel_old_timeval
 107#define ns_to_kernel_old_timeval ns_to_old_timeval32
 108
 109#include "../../../fs/binfmt_elf.c"
 110