770885472ed4c850b59d5fea34ad1c0c5db1439f
[linux-2.6.git] / arch / um / sys-i386 / asm / elf.h
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 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
78 extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
79
80 #define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
81
82 extern long elf_aux_hwcap;
83 #define ELF_HWCAP (elf_aux_hwcap)
84
85 extern char * elf_aux_platform;
86 #define ELF_PLATFORM (elf_aux_platform)
87
88 #define SET_PERSONALITY(ex) do { } while (0)
89
90 extern unsigned long vsyscall_ehdr;
91 extern unsigned long vsyscall_end;
92 extern unsigned long __kernel_vsyscall;
93
94 #define VSYSCALL_BASE vsyscall_ehdr
95 #define VSYSCALL_END vsyscall_end
96
97 /*
98  * This is the range that is readable by user mode, and things
99  * acting like user mode such as get_user_pages.
100  */
101 #define FIXADDR_USER_START      VSYSCALL_BASE
102 #define FIXADDR_USER_END        VSYSCALL_END
103
104 /*
105  * Architecture-neutral AT_ values in 0-17, leave some room
106  * for more of them, start the x86-specific ones at 32.
107  */
108 #define AT_SYSINFO              32
109 #define AT_SYSINFO_EHDR         33
110
111 #define ARCH_DLINFO                                             \
112 do {                                                            \
113         if ( vsyscall_ehdr ) {                                  \
114                 NEW_AUX_ENT(AT_SYSINFO, __kernel_vsyscall);     \
115                 NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr);    \
116         }                                                       \
117 } while (0)
118
119 /*
120  * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
121  * extra segments containing the vsyscall DSO contents.  Dumping its
122  * contents makes post-mortem fully interpretable later without matching up
123  * the same kernel and hardware config to see what PC values meant.
124  * Dumping its extra ELF program headers includes all the other information
125  * a debugger needs to easily find how the vsyscall DSO was being used.
126  */
127 #define ELF_CORE_EXTRA_PHDRS                                                  \
128         (vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0 )
129
130 #define ELF_CORE_WRITE_EXTRA_PHDRS                                            \
131 if ( vsyscall_ehdr ) {                                                        \
132         const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
133         const struct elf_phdr *const phdrp =                                  \
134                 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
135         int i;                                                                \
136         Elf32_Off ofs = 0;                                                    \
137         for (i = 0; i < ehdrp->e_phnum; ++i) {                                \
138                 struct elf_phdr phdr = phdrp[i];                              \
139                 if (phdr.p_type == PT_LOAD) {                                 \
140                         ofs = phdr.p_offset = offset;                         \
141                         offset += phdr.p_filesz;                              \
142                 }                                                             \
143                 else                                                          \
144                         phdr.p_offset += ofs;                                 \
145                 phdr.p_paddr = 0; /* match other core phdrs */                \
146                 DUMP_WRITE(&phdr, sizeof(phdr));                              \
147         }                                                                     \
148 }
149 #define ELF_CORE_WRITE_EXTRA_DATA                                             \
150 if ( vsyscall_ehdr ) {                                                        \
151         const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
152         const struct elf_phdr *const phdrp =                                  \
153                 (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
154         int i;                                                                \
155         for (i = 0; i < ehdrp->e_phnum; ++i) {                                \
156                 if (phdrp[i].p_type == PT_LOAD)                               \
157                         DUMP_WRITE((void *) phdrp[i].p_vaddr,                 \
158                                    phdrp[i].p_filesz);                        \
159         }                                                                     \
160 }
161
162 #endif