1/* 2 * Support for n32 Linux/MIPS ELF binaries. 3 * 4 * Copyright (C) 1999, 2001 Ralf Baechle 5 * Copyright (C) 1999, 2001 Silicon Graphics, Inc. 6 * 7 * Heavily inspired by the 32-bit Sparc compat code which is 8 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com) 9 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz) 10 */ 11 12#define ELF_ARCH EM_MIPS 13#define ELF_CLASS ELFCLASS32 14#ifdef __MIPSEB__ 15#define ELF_DATA ELFDATA2MSB; 16#else /* __MIPSEL__ */ 17#define ELF_DATA ELFDATA2LSB; 18#endif 19 20/* ELF register definitions */ 21#define ELF_NGREG 45 22#define ELF_NFPREG 33 23 24typedef unsigned long elf_greg_t; 25typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 26 27typedef double elf_fpreg_t; 28typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 29 30/* 31 * This is used to ensure we don't load something for the wrong architecture. 32 */ 33#define elf_check_arch(hdr) \ 34({ \ 35 int __res = 1; \ 36 struct elfhdr *__h = (hdr); \ 37 \ 38 if (__h->e_machine != EM_MIPS) \ 39 __res = 0; \ 40 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ 41 __res = 0; \ 42 if (((__h->e_flags & EF_MIPS_ABI2) == 0) || \ 43 ((__h->e_flags & EF_MIPS_ABI) != 0)) \ 44 __res = 0; \ 45 \ 46 __res; \ 47}) 48 49#define TASK32_SIZE 0x7fff8000UL 50#undef ELF_ET_DYN_BASE 51#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2) 52 53#include <asm/processor.h> 54#include <linux/module.h> 55#include <linux/elfcore.h> 56#include <linux/compat.h> 57#include <linux/math64.h> 58 59#define elf_prstatus elf_prstatus32 60struct elf_prstatus32 61{ 62 struct elf_siginfo pr_info; /* Info associated with signal */ 63 short pr_cursig; /* Current signal */ 64 unsigned int pr_sigpend; /* Set of pending signals */ 65 unsigned int pr_sighold; /* Set of held signals */ 66 pid_t pr_pid; 67 pid_t pr_ppid; 68 pid_t pr_pgrp; 69 pid_t pr_sid; 70 struct compat_timeval pr_utime; /* User time */ 71 struct compat_timeval pr_stime; /* System time */ 72 struct compat_timeval pr_cutime;/* Cumulative user time */ 73 struct compat_timeval pr_cstime;/* Cumulative system time */ 74 elf_gregset_t pr_reg; /* GP registers */ 75 int pr_fpvalid; /* True if math co-processor being used. */ 76}; 77 78#define elf_prpsinfo elf_prpsinfo32 79struct elf_prpsinfo32 80{ 81 char pr_state; /* numeric process state */ 82 char pr_sname; /* char for pr_state */ 83 char pr_zomb; /* zombie */ 84 char pr_nice; /* nice val */ 85 unsigned int pr_flag; /* flags */ 86 __kernel_uid_t pr_uid; 87 __kernel_gid_t pr_gid; 88 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; 89 /* Lots missing */ 90 char pr_fname[16]; /* filename of executable */ 91 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ 92}; 93 94#define elf_caddr_t u32 95#define init_elf_binfmt init_elfn32_binfmt 96 97#define jiffies_to_timeval jiffies_to_compat_timeval 98static __inline__ void 99jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value) 100{ 101 /* 102 * Convert jiffies to nanoseconds and separate with 103 * one divide. 104 */ 105 u64 nsec = (u64)jiffies * TICK_NSEC; 106 u32 rem; 107 value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem); 108 value->tv_usec = rem / NSEC_PER_USEC; 109} 110 111#define ELF_CORE_EFLAGS EF_MIPS_ABI2 112 113MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries"); 114MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)"); 115 116#undef MODULE_DESCRIPTION 117#undef MODULE_AUTHOR 118 119#undef TASK_SIZE 120#define TASK_SIZE TASK_SIZE32 121 122#include "../../../fs/binfmt_elf.c" 123