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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 | */ | |
c9babb19 | 33 | #define elf_check_arch elfn32_check_arch |
1da177e4 LT |
34 | |
35 | #define TASK32_SIZE 0x7fff8000UL | |
36 | #undef ELF_ET_DYN_BASE | |
70342287 | 37 | #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2) |
1da177e4 LT |
38 | |
39 | #include <asm/processor.h> | |
40 | #include <linux/module.h> | |
1da177e4 LT |
41 | #include <linux/elfcore.h> |
42 | #include <linux/compat.h> | |
f8bd2258 | 43 | #include <linux/math64.h> |
1da177e4 LT |
44 | |
45 | #define elf_prstatus elf_prstatus32 | |
46 | struct elf_prstatus32 | |
47 | { | |
48 | struct elf_siginfo pr_info; /* Info associated with signal */ | |
49 | short pr_cursig; /* Current signal */ | |
50 | unsigned int pr_sigpend; /* Set of pending signals */ | |
51 | unsigned int pr_sighold; /* Set of held signals */ | |
52 | pid_t pr_pid; | |
53 | pid_t pr_ppid; | |
54 | pid_t pr_pgrp; | |
55 | pid_t pr_sid; | |
70342287 RB |
56 | struct compat_timeval pr_utime; /* User time */ |
57 | struct compat_timeval pr_stime; /* System time */ | |
1da177e4 LT |
58 | struct compat_timeval pr_cutime;/* Cumulative user time */ |
59 | struct compat_timeval pr_cstime;/* Cumulative system time */ | |
60 | elf_gregset_t pr_reg; /* GP registers */ | |
61 | int pr_fpvalid; /* True if math co-processor being used. */ | |
62 | }; | |
63 | ||
64 | #define elf_prpsinfo elf_prpsinfo32 | |
65 | struct elf_prpsinfo32 | |
66 | { | |
67 | char pr_state; /* numeric process state */ | |
68 | char pr_sname; /* char for pr_state */ | |
69 | char pr_zomb; /* zombie */ | |
70 | char pr_nice; /* nice val */ | |
71 | unsigned int pr_flag; /* flags */ | |
72 | __kernel_uid_t pr_uid; | |
73 | __kernel_gid_t pr_gid; | |
74 | pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; | |
75 | /* Lots missing */ | |
76 | char pr_fname[16]; /* filename of executable */ | |
70342287 | 77 | char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ |
1da177e4 LT |
78 | }; |
79 | ||
1da177e4 LT |
80 | #define elf_caddr_t u32 |
81 | #define init_elf_binfmt init_elfn32_binfmt | |
82 | ||
83 | #define jiffies_to_timeval jiffies_to_compat_timeval | |
84 | static __inline__ void | |
85 | jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value) | |
86 | { | |
87 | /* | |
603e82ed | 88 | * Convert jiffies to nanoseconds and separate with |
1da177e4 LT |
89 | * one divide. |
90 | */ | |
42a3b4f2 | 91 | u64 nsec = (u64)jiffies * TICK_NSEC; |
f8bd2258 RZ |
92 | u32 rem; |
93 | value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem); | |
909fa64c | 94 | value->tv_usec = rem / NSEC_PER_USEC; |
1da177e4 LT |
95 | } |
96 | ||
97 | #define ELF_CORE_EFLAGS EF_MIPS_ABI2 | |
98 | ||
99 | MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries"); | |
100 | MODULE_AUTHOR("Ralf Baechle (ralf@linux-mips.org)"); | |
101 | ||
102 | #undef MODULE_DESCRIPTION | |
103 | #undef MODULE_AUTHOR | |
104 | ||
c6237645 RB |
105 | #undef TASK_SIZE |
106 | #define TASK_SIZE TASK_SIZE32 | |
107 | ||
7b741aa4 RB |
108 | #undef cputime_to_timeval |
109 | #define cputime_to_timeval cputime_to_compat_timeval | |
110 | static __inline__ void | |
111 | cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value) | |
112 | { | |
113 | unsigned long jiffies = cputime_to_jiffies(cputime); | |
114 | ||
115 | value->tv_usec = (jiffies % HZ) * (1000000L / HZ); | |
116 | value->tv_sec = jiffies / HZ; | |
117 | } | |
118 | ||
1da177e4 | 119 | #include "../../../fs/binfmt_elf.c" |