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Bodo Stroesserdbc35cc72005-05-05 16:15:35 -07001/*
2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
4 */
5#ifndef __UM_ELF_I386_H
6#define __UM_ELF_I386_H
7
Jeff Dikeba9950c2005-05-20 13:59:07 -07008#include <asm/user.h>
Bodo Stroesserdbc35cc72005-05-05 16:15:35 -07009
10#define R_386_NONE 0
11#define R_386_32 1
12#define R_386_PC32 2
13#define R_386_GOT32 3
14#define R_386_PLT32 4
15#define R_386_COPY 5
16#define R_386_GLOB_DAT 6
17#define R_386_JMP_SLOT 7
18#define R_386_RELATIVE 8
19#define R_386_GOTOFF 9
20#define R_386_GOTPC 10
21#define R_386_NUM 11
22
23typedef unsigned long elf_greg_t;
24
25#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
26typedef elf_greg_t elf_gregset_t[ELF_NGREG];
27
28typedef struct user_i387_struct elf_fpregset_t;
29
30/*
31 * This is used to ensure we don't load something for the wrong architecture.
32 */
33#define elf_check_arch(x) \
34 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
35
36#define ELF_CLASS ELFCLASS32
37#define ELF_DATA ELFDATA2LSB
38#define ELF_ARCH EM_386
39
40#define ELF_PLAT_INIT(regs, load_addr) do { \
41 PT_REGS_EBX(regs) = 0; \
42 PT_REGS_ECX(regs) = 0; \
43 PT_REGS_EDX(regs) = 0; \
44 PT_REGS_ESI(regs) = 0; \
45 PT_REGS_EDI(regs) = 0; \
46 PT_REGS_EBP(regs) = 0; \
47 PT_REGS_EAX(regs) = 0; \
48} while(0)
49
50#define USE_ELF_CORE_DUMP
51#define ELF_EXEC_PAGESIZE 4096
52
53#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
54
55/* Shamelessly stolen from include/asm-i386/elf.h */
56
57#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
58 pr_reg[0] = PT_REGS_EBX(regs); \
59 pr_reg[1] = PT_REGS_ECX(regs); \
60 pr_reg[2] = PT_REGS_EDX(regs); \
61 pr_reg[3] = PT_REGS_ESI(regs); \
62 pr_reg[4] = PT_REGS_EDI(regs); \
63 pr_reg[5] = PT_REGS_EBP(regs); \
64 pr_reg[6] = PT_REGS_EAX(regs); \
65 pr_reg[7] = PT_REGS_DS(regs); \
66 pr_reg[8] = PT_REGS_ES(regs); \
67 /* fake once used fs and gs selectors? */ \
68 pr_reg[9] = PT_REGS_DS(regs); \
69 pr_reg[10] = PT_REGS_DS(regs); \
70 pr_reg[11] = PT_REGS_SYSCALL_NR(regs); \
71 pr_reg[12] = PT_REGS_IP(regs); \
72 pr_reg[13] = PT_REGS_CS(regs); \
73 pr_reg[14] = PT_REGS_EFLAGS(regs); \
74 pr_reg[15] = PT_REGS_SP(regs); \
75 pr_reg[16] = PT_REGS_SS(regs); \
76} while(0);
77
78extern long elf_aux_hwcap;
79#define ELF_HWCAP (elf_aux_hwcap)
80
81extern char * elf_aux_platform;
82#define ELF_PLATFORM (elf_aux_platform)
83
84#define SET_PERSONALITY(ex, ibcs2) do ; while(0)
85
86extern unsigned long vsyscall_ehdr;
87extern unsigned long vsyscall_end;
88extern unsigned long __kernel_vsyscall;
89
90#define VSYSCALL_BASE vsyscall_ehdr
91#define VSYSCALL_END vsyscall_end
92
93/*
94 * This is the range that is readable by user mode, and things
95 * acting like user mode such as get_user_pages.
96 */
97#define FIXADDR_USER_START VSYSCALL_BASE
98#define FIXADDR_USER_END VSYSCALL_END
99
100/*
101 * Architecture-neutral AT_ values in 0-17, leave some room
102 * for more of them, start the x86-specific ones at 32.
103 */
104#define AT_SYSINFO 32
105#define AT_SYSINFO_EHDR 33
106
107#define ARCH_DLINFO \
108do { \
109 if ( vsyscall_ehdr ) { \
110 NEW_AUX_ENT(AT_SYSINFO, __kernel_vsyscall); \
111 NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr); \
112 } \
113} while (0)
114
115/*
116 * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
117 * extra segments containing the vsyscall DSO contents. Dumping its
118 * contents makes post-mortem fully interpretable later without matching up
119 * the same kernel and hardware config to see what PC values meant.
120 * Dumping its extra ELF program headers includes all the other information
121 * a debugger needs to easily find how the vsyscall DSO was being used.
122 */
123#define ELF_CORE_EXTRA_PHDRS \
124 (vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0 )
125
126#define ELF_CORE_WRITE_EXTRA_PHDRS \
127if ( vsyscall_ehdr ) { \
128 const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr; \
129 const struct elf_phdr *const phdrp = \
130 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); \
131 int i; \
132 Elf32_Off ofs = 0; \
133 for (i = 0; i < ehdrp->e_phnum; ++i) { \
134 struct elf_phdr phdr = phdrp[i]; \
135 if (phdr.p_type == PT_LOAD) { \
136 ofs = phdr.p_offset = offset; \
137 offset += phdr.p_filesz; \
138 } \
139 else \
140 phdr.p_offset += ofs; \
141 phdr.p_paddr = 0; /* match other core phdrs */ \
142 DUMP_WRITE(&phdr, sizeof(phdr)); \
143 } \
144}
145#define ELF_CORE_WRITE_EXTRA_DATA \
146if ( vsyscall_ehdr ) { \
147 const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr; \
148 const struct elf_phdr *const phdrp = \
149 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); \
150 int i; \
151 for (i = 0; i < ehdrp->e_phnum; ++i) { \
152 if (phdrp[i].p_type == PT_LOAD) \
153 DUMP_WRITE((void *) phdrp[i].p_vaddr, \
154 phdrp[i].p_filesz); \
155 } \
156}
157
158#endif
159
160/*
161 * Overrides for Emacs so that we follow Linus's tabbing style.
162 * Emacs will notice this stuff at the end of the file and automatically
163 * adjust the settings for this buffer only. This must remain at the end
164 * of the file.
165 * ---------------------------------------------------------------------------
166 * Local variables:
167 * c-file-style: "linux"
168 * End:
169 */