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1da177e4 LT |
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) | |
70342287 | 9 | * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz) |
1da177e4 LT |
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 long 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 | ((__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 | |
70342287 | 51 | #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2) |
1da177e4 LT |
52 | |
53 | #include <asm/processor.h> | |
54 | #include <linux/module.h> | |
1da177e4 LT |
55 | #include <linux/elfcore.h> |
56 | #include <linux/compat.h> | |
f8bd2258 | 57 | #include <linux/math64.h> |
1da177e4 LT |
58 | |
59 | #define elf_prstatus elf_prstatus32 | |
60 | struct 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; | |
70342287 RB |
70 | struct compat_timeval pr_utime; /* User time */ |
71 | struct compat_timeval pr_stime; /* System time */ | |
1da177e4 LT |
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 | |
79 | struct 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 */ | |
70342287 | 91 | char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ |
1da177e4 LT |
92 | }; |
93 | ||
1da177e4 LT |
94 | #define elf_caddr_t u32 |
95 | #define init_elf_binfmt init_elfn32_binfmt | |
96 | ||
97 | #define jiffies_to_timeval jiffies_to_compat_timeval | |
98 | static __inline__ void | |
99 | jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value) | |
100 | { | |
101 | /* | |
603e82ed | 102 | * Convert jiffies to nanoseconds and separate with |
1da177e4 LT |
103 | * one divide. |
104 | */ | |
42a3b4f2 | 105 | u64 nsec = (u64)jiffies * TICK_NSEC; |
f8bd2258 RZ |
106 | u32 rem; |
107 | value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem); | |
909fa64c | 108 | value->tv_usec = rem / NSEC_PER_USEC; |
1da177e4 LT |
109 | } |
110 | ||
111 | #define ELF_CORE_EFLAGS EF_MIPS_ABI2 | |
112 | ||
113 | MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries"); | |
114 | MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)"); | |
115 | ||
116 | #undef MODULE_DESCRIPTION | |
117 | #undef MODULE_AUTHOR | |
118 | ||
c6237645 RB |
119 | #undef TASK_SIZE |
120 | #define TASK_SIZE TASK_SIZE32 | |
121 | ||
7b741aa4 RB |
122 | #undef cputime_to_timeval |
123 | #define cputime_to_timeval cputime_to_compat_timeval | |
124 | static __inline__ void | |
125 | cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value) | |
126 | { | |
127 | unsigned long jiffies = cputime_to_jiffies(cputime); | |
128 | ||
129 | value->tv_usec = (jiffies % HZ) * (1000000L / HZ); | |
130 | value->tv_sec = jiffies / HZ; | |
131 | } | |
132 | ||
1da177e4 | 133 | #include "../../../fs/binfmt_elf.c" |