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1da177e4 LT |
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> | |
57 | #include <linux/config.h> | |
58 | #include <linux/elfcore.h> | |
59 | #include <linux/compat.h> | |
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 | ||
96 | #define elf_addr_t u32 | |
97 | #define elf_caddr_t u32 | |
98 | #define init_elf_binfmt init_elf32_binfmt | |
99 | ||
100 | #define jiffies_to_timeval jiffies_to_compat_timeval | |
101 | static __inline__ void | |
102 | jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value) | |
103 | { | |
104 | /* | |
105 | * Convert jiffies to nanoseconds and seperate with | |
106 | * one divide. | |
107 | */ | |
108 | u64 nsec = (u64)jiffies * TICK_NSEC; | |
109 | value->tv_sec = div_long_long_rem(nsec, NSEC_PER_SEC, &value->tv_usec); | |
110 | value->tv_usec /= NSEC_PER_USEC; | |
111 | } | |
112 | ||
113 | #undef ELF_CORE_COPY_REGS | |
114 | #define ELF_CORE_COPY_REGS(_dest,_regs) elf32_core_copy_regs(_dest,_regs); | |
115 | ||
116 | void elf32_core_copy_regs(elf_gregset_t _dest, struct pt_regs *_regs) | |
117 | { | |
118 | int i; | |
119 | ||
120 | memset(_dest, 0, sizeof(elf_gregset_t)); | |
121 | ||
122 | /* XXXKW the 6 is from EF_REG0 in gdb/gdb/mips-linux-tdep.c, include/asm-mips/reg.h */ | |
123 | for (i=6; i<38; i++) | |
124 | _dest[i] = (elf_greg_t) _regs->regs[i-6]; | |
125 | _dest[i++] = (elf_greg_t) _regs->lo; | |
126 | _dest[i++] = (elf_greg_t) _regs->hi; | |
127 | _dest[i++] = (elf_greg_t) _regs->cp0_epc; | |
128 | _dest[i++] = (elf_greg_t) _regs->cp0_badvaddr; | |
129 | _dest[i++] = (elf_greg_t) _regs->cp0_status; | |
130 | _dest[i++] = (elf_greg_t) _regs->cp0_cause; | |
131 | } | |
132 | ||
133 | MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries"); | |
134 | MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)"); | |
135 | ||
136 | #undef MODULE_DESCRIPTION | |
137 | #undef MODULE_AUTHOR | |
138 | ||
139 | #include "../../../fs/binfmt_elf.c" |