Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 24 | typedef unsigned int elf_greg_t; |
| 25 | typedef elf_greg_t elf_gregset_t[ELF_NGREG]; |
| 26 | |
| 27 | typedef double elf_fpreg_t; |
| 28 | typedef 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #include <linux/elfcore.h> |
| 58 | #include <linux/compat.h> |
Roman Zippel | f8bd225 | 2008-05-01 04:34:31 -0700 | [diff] [blame] | 59 | #include <linux/math64.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | #define elf_prstatus elf_prstatus32 |
| 62 | struct elf_prstatus32 |
| 63 | { |
| 64 | struct elf_siginfo pr_info; /* Info associated with signal */ |
| 65 | short pr_cursig; /* Current signal */ |
| 66 | unsigned int pr_sigpend; /* Set of pending signals */ |
| 67 | unsigned int pr_sighold; /* Set of held signals */ |
| 68 | pid_t pr_pid; |
| 69 | pid_t pr_ppid; |
| 70 | pid_t pr_pgrp; |
| 71 | pid_t pr_sid; |
| 72 | struct compat_timeval pr_utime; /* User time */ |
| 73 | struct compat_timeval pr_stime; /* System time */ |
| 74 | struct compat_timeval pr_cutime;/* Cumulative user time */ |
| 75 | struct compat_timeval pr_cstime;/* Cumulative system time */ |
| 76 | elf_gregset_t pr_reg; /* GP registers */ |
| 77 | int pr_fpvalid; /* True if math co-processor being used. */ |
| 78 | }; |
| 79 | |
| 80 | #define elf_prpsinfo elf_prpsinfo32 |
| 81 | struct elf_prpsinfo32 |
| 82 | { |
| 83 | char pr_state; /* numeric process state */ |
| 84 | char pr_sname; /* char for pr_state */ |
| 85 | char pr_zomb; /* zombie */ |
| 86 | char pr_nice; /* nice val */ |
| 87 | unsigned int pr_flag; /* flags */ |
| 88 | __kernel_uid_t pr_uid; |
| 89 | __kernel_gid_t pr_gid; |
| 90 | pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; |
| 91 | /* Lots missing */ |
| 92 | char pr_fname[16]; /* filename of executable */ |
| 93 | char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ |
| 94 | }; |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #define elf_caddr_t u32 |
| 97 | #define init_elf_binfmt init_elf32_binfmt |
| 98 | |
| 99 | #define jiffies_to_timeval jiffies_to_compat_timeval |
Ralf Baechle | b053c98 | 2005-01-26 02:21:06 +0000 | [diff] [blame] | 100 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value) |
| 102 | { |
| 103 | /* |
Joe Perches | 603e82e | 2008-02-03 16:54:53 +0200 | [diff] [blame] | 104 | * Convert jiffies to nanoseconds and separate with |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | * one divide. |
| 106 | */ |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 107 | u64 nsec = (u64)jiffies * TICK_NSEC; |
Roman Zippel | f8bd225 | 2008-05-01 04:34:31 -0700 | [diff] [blame] | 108 | u32 rem; |
| 109 | value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem); |
Atsushi Nemoto | 909fa64 | 2006-02-21 01:25:06 +0900 | [diff] [blame] | 110 | value->tv_usec = rem / NSEC_PER_USEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | #undef ELF_CORE_COPY_REGS |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 114 | #define ELF_CORE_COPY_REGS(_dest, _regs) elf32_core_copy_regs(_dest, _regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Ralf Baechle | b053c98 | 2005-01-26 02:21:06 +0000 | [diff] [blame] | 116 | void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
| 118 | int i; |
| 119 | |
Ralf Baechle | b053c98 | 2005-01-26 02:21:06 +0000 | [diff] [blame] | 120 | for (i = 0; i < EF_R0; i++) |
| 121 | grp[i] = 0; |
| 122 | grp[EF_R0] = 0; |
| 123 | for (i = 1; i <= 31; i++) |
| 124 | grp[EF_R0 + i] = (elf_greg_t) regs->regs[i]; |
| 125 | grp[EF_R26] = 0; |
| 126 | grp[EF_R27] = 0; |
| 127 | grp[EF_LO] = (elf_greg_t) regs->lo; |
| 128 | grp[EF_HI] = (elf_greg_t) regs->hi; |
| 129 | grp[EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc; |
| 130 | grp[EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr; |
| 131 | grp[EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status; |
| 132 | grp[EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause; |
| 133 | #ifdef EF_UNUSED0 |
| 134 | grp[EF_UNUSED0] = 0; |
| 135 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries"); |
| 139 | MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)"); |
| 140 | |
| 141 | #undef MODULE_DESCRIPTION |
| 142 | #undef MODULE_AUTHOR |
| 143 | |
Ralf Baechle | c623764 | 2005-01-26 02:22:22 +0000 | [diff] [blame] | 144 | #undef TASK_SIZE |
| 145 | #define TASK_SIZE TASK_SIZE32 |
| 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | #include "../../../fs/binfmt_elf.c" |