1 /*
2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5 #ifndef __UM_ELF_I386_H
6 #define __UM_ELF_I386_H
7
8 #include <asm/user.h>
9 #include "skas.h"
10
11 #define R_386_NONE 0
12 #define R_386_32 1
13 #define R_386_PC32 2
14 #define R_386_GOT32 3
15 #define R_386_PLT32 4
16 #define R_386_COPY 5
17 #define R_386_GLOB_DAT 6
18 #define R_386_JMP_SLOT 7
19 #define R_386_RELATIVE 8
20 #define R_386_GOTOFF 9
21 #define R_386_GOTPC 10
22 #define R_386_NUM 11
23
24 typedef unsigned long elf_greg_t;
25
26 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
27 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
28
29 typedef struct user_i387_struct elf_fpregset_t;
30
31 /*
32 * This is used to ensure we don't load something for the wrong architecture.
33 */
34 #define elf_check_arch(x) \
35 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
36
37 #define ELF_CLASS ELFCLASS32
38 #define ELF_DATA ELFDATA2LSB
39 #define ELF_ARCH EM_386
40
41 #define ELF_PLAT_INIT(regs, load_addr) do { \
42 PT_REGS_EBX(regs) = 0; \
43 PT_REGS_ECX(regs) = 0; \
44 PT_REGS_EDX(regs) = 0; \
45 PT_REGS_ESI(regs) = 0; \
46 PT_REGS_EDI(regs) = 0; \
47 PT_REGS_EBP(regs) = 0; \
48 PT_REGS_EAX(regs) = 0; \
49 } while (0)
50
51 #define USE_ELF_CORE_DUMP
52 #define ELF_EXEC_PAGESIZE 4096
53
54 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
55
56 /* Shamelessly stolen from include/asm-i386/elf.h */
57
58 #define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
59 pr_reg[0] = PT_REGS_EBX(regs); \
60 pr_reg[1] = PT_REGS_ECX(regs); \
61 pr_reg[2] = PT_REGS_EDX(regs); \
62 pr_reg[3] = PT_REGS_ESI(regs); \
63 pr_reg[4] = PT_REGS_EDI(regs); \
64 pr_reg[5] = PT_REGS_EBP(regs); \
65 pr_reg[6] = PT_REGS_EAX(regs); \
66 pr_reg[7] = PT_REGS_DS(regs); \
67 pr_reg[8] = PT_REGS_ES(regs); \
68 /* fake once used fs and gs selectors? */ \
69 pr_reg[9] = PT_REGS_DS(regs); \
70 pr_reg[10] = PT_REGS_DS(regs); \
71 pr_reg[11] = PT_REGS_SYSCALL_NR(regs); \
72 pr_reg[12] = PT_REGS_IP(regs); \
73 pr_reg[13] = PT_REGS_CS(regs); \
74 pr_reg[14] = PT_REGS_EFLAGS(regs); \
75 pr_reg[15] = PT_REGS_SP(regs); \
76 pr_reg[16] = PT_REGS_SS(regs); \
77 } while (0);
78
79 extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
80
81 #define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
82
83 extern long elf_aux_hwcap;
84 #define ELF_HWCAP (elf_aux_hwcap)
85
86 extern char * elf_aux_platform;
87 #define ELF_PLATFORM (elf_aux_platform)
88
89 #define SET_PERSONALITY(ex) do { } while (0)
90
91 extern unsigned long vsyscall_ehdr;
92 extern unsigned long vsyscall_end;
93 extern unsigned long __kernel_vsyscall;
94
95 #define VSYSCALL_BASE vsyscall_ehdr
96 #define VSYSCALL_END vsyscall_end
97
98 /*
99 * This is the range that is readable by user mode, and things
100 * acting like user mode such as get_user_pages.
101 */
102 #define FIXADDR_USER_START VSYSCALL_BASE
103 #define FIXADDR_USER_END VSYSCALL_END
104
105 /*
106 * Architecture-neutral AT_ values in 0-17, leave some room
107 * for more of them, start the x86-specific ones at 32.
108 */
109 #define AT_SYSINFO 32
110 #define AT_SYSINFO_EHDR 33
111
112 #define ARCH_DLINFO \
113 do { \
114 if ( vsyscall_ehdr ) { \
115 NEW_AUX_ENT(AT_SYSINFO, __kernel_vsyscall); \
116 NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr); \
117 } \
118 } while (0)
119
120 /*
121 * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
122 * extra segments containing the vsyscall DSO contents. Dumping its
123 * contents makes post-mortem fully interpretable later without matching up
124 * the same kernel and hardware config to see what PC values meant.
125 * Dumping its extra ELF program headers includes all the other information
126 * a debugger needs to easily find how the vsyscall DSO was being used.
127 */
128 #define ELF_CORE_EXTRA_PHDRS \
129 (vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0 )
130
131 #define ELF_CORE_WRITE_EXTRA_PHDRS \
132 if ( vsyscall_ehdr ) { \
133 const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr; \
134 const struct elf_phdr *const phdrp = \
135 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); \
136 int i; \
137 Elf32_Off ofs = 0; \
138 for (i = 0; i < ehdrp->e_phnum; ++i) { \
139 struct elf_phdr phdr = phdrp[i]; \
140 if (phdr.p_type == PT_LOAD) { \
141 ofs = phdr.p_offset = offset; \
142 offset += phdr.p_filesz; \
143 } \
144 else \
145 phdr.p_offset += ofs; \
146 phdr.p_paddr = 0; /* match other core phdrs */ \
147 DUMP_WRITE(&phdr, sizeof(phdr)); \
148 } \
149 }
150 #define ELF_CORE_WRITE_EXTRA_DATA \
151 if ( vsyscall_ehdr ) { \
152 const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr; \
153 const struct elf_phdr *const phdrp = \
154 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff); \
155 int i; \
156 for (i = 0; i < ehdrp->e_phnum; ++i) { \
157 if (phdrp[i].p_type == PT_LOAD) \
158 DUMP_WRITE((void *) phdrp[i].p_vaddr, \
159 phdrp[i].p_filesz); \
160 } \
161 }
162
163 #endif
164
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