1/* 2 * Support for o32 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 int 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 __res = 0; \ 44 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ 45 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ 46 __res = 0; \ 47 \ 48 __res; \ 49}) 50 51#define TASK32_SIZE 0x7fff8000UL 52#undef ELF_ET_DYN_BASE 53#define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2) 54 55#include <asm/processor.h> 56#include <linux/module.h> 57#include <linux/elfcore.h> 58#include <linux/compat.h> 59 60#define elf_prstatus elf_prstatus32 61struct elf_prstatus32 62{ 63 struct elf_siginfo pr_info; /* Info associated with signal */ 64 short pr_cursig; /* Current signal */ 65 unsigned int pr_sigpend; /* Set of pending signals */ 66 unsigned int pr_sighold; /* Set of held signals */ 67 pid_t pr_pid; 68 pid_t pr_ppid; 69 pid_t pr_pgrp; 70 pid_t pr_sid; 71 struct compat_timeval pr_utime; /* User time */ 72 struct compat_timeval pr_stime; /* System time */ 73 struct compat_timeval pr_cutime;/* Cumulative user time */ 74 struct compat_timeval pr_cstime;/* Cumulative system time */ 75 elf_gregset_t pr_reg; /* GP registers */ 76 int pr_fpvalid; /* True if math co-processor being used. */ 77}; 78 79#define elf_prpsinfo elf_prpsinfo32 80struct elf_prpsinfo32 81{ 82 char pr_state; /* numeric process state */ 83 char pr_sname; /* char for pr_state */ 84 char pr_zomb; /* zombie */ 85 char pr_nice; /* nice val */ 86 unsigned int pr_flag; /* flags */ 87 __kernel_uid_t pr_uid; 88 __kernel_gid_t pr_gid; 89 pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; 90 /* Lots missing */ 91 char pr_fname[16]; /* filename of executable */ 92 char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ 93}; 94 95#define elf_caddr_t u32 96#define init_elf_binfmt init_elf32_binfmt 97 98#define jiffies_to_timeval jiffies_to_compat_timeval 99static inline void 100jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value) 101{ 102 /* 103 * Convert jiffies to nanoseconds and seperate with 104 * one divide. 105 */ 106 u64 nsec = (u64)jiffies * TICK_NSEC; 107 long rem; 108 value->tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &rem); 109 value->tv_usec = rem / NSEC_PER_USEC; 110} 111 112#undef ELF_CORE_COPY_REGS 113#define ELF_CORE_COPY_REGS(_dest,_regs) elf32_core_copy_regs(_dest,_regs); 114 115void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs) 116{ 117 int i; 118 119 for (i = 0; i < EF_R0; i++) 120 grp[i] = 0; 121 grp[EF_R0] = 0; 122 for (i = 1; i <= 31; i++) 123 grp[EF_R0 + i] = (elf_greg_t) regs->regs[i]; 124 grp[EF_R26] = 0; 125 grp[EF_R27] = 0; 126 grp[EF_LO] = (elf_greg_t) regs->lo; 127 grp[EF_HI] = (elf_greg_t) regs->hi; 128 grp[EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc; 129 grp[EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr; 130 grp[EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status; 131 grp[EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause; 132#ifdef EF_UNUSED0 133 grp[EF_UNUSED0] = 0; 134#endif 135} 136 137MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries"); 138MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)"); 139 140#undef MODULE_DESCRIPTION 141#undef MODULE_AUTHOR 142 143#undef TASK_SIZE 144#define TASK_SIZE TASK_SIZE32 145 146#include "../../../fs/binfmt_elf.c" 147