1/*
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
8#include <asm/user.h>
9
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 */
170