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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASMi386_ELF_H
2#define __ASMi386_ELF_H
3
4/*
5 * ELF register definitions..
6 */
7
8#include <asm/ptrace.h>
9#include <asm/user.h>
H. J. Lu36d57ac2005-09-06 15:16:49 -070010#include <asm/auxvec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
12#include <linux/utsname.h>
13
14#define R_386_NONE 0
15#define R_386_32 1
16#define R_386_PC32 2
17#define R_386_GOT32 3
18#define R_386_PLT32 4
19#define R_386_COPY 5
20#define R_386_GLOB_DAT 6
21#define R_386_JMP_SLOT 7
22#define R_386_RELATIVE 8
23#define R_386_GOTOFF 9
24#define R_386_GOTPC 10
25#define R_386_NUM 11
26
27typedef unsigned long elf_greg_t;
28
29#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
30typedef elf_greg_t elf_gregset_t[ELF_NGREG];
31
32typedef struct user_i387_struct elf_fpregset_t;
33typedef struct user_fxsr_struct elf_fpxregset_t;
34
35/*
36 * This is used to ensure we don't load something for the wrong architecture.
37 */
38#define elf_check_arch(x) \
39 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
40
41/*
42 * These are used to set parameters in the core dumps.
43 */
44#define ELF_CLASS ELFCLASS32
45#define ELF_DATA ELFDATA2LSB
46#define ELF_ARCH EM_386
47
David Woodhouse651c9232006-09-12 20:36:04 -070048#ifdef __KERNEL__
49
50#include <asm/processor.h>
51#include <asm/system.h> /* for savesegment */
52#include <asm/desc.h>
53
Linus Torvalds1da177e2005-04-16 15:20:36 -070054/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
55 contains a pointer to a function which might be registered using `atexit'.
56 This provides a mean for the dynamic linker to call DT_FINI functions for
57 shared libraries that have been loaded before the code runs.
58
59 A value of 0 tells we have no such handler.
60
61 We might as well make sure everything else is cleared too (except for %esp),
62 just to make things more deterministic.
63 */
64#define ELF_PLAT_INIT(_r, load_addr) do { \
65 _r->ebx = 0; _r->ecx = 0; _r->edx = 0; \
66 _r->esi = 0; _r->edi = 0; _r->ebp = 0; \
67 _r->eax = 0; \
68} while (0)
69
70#define USE_ELF_CORE_DUMP
71#define ELF_EXEC_PAGESIZE 4096
72
73/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
74 use of this is to invoke "./ld.so someprog" to test out a new version of
75 the loader. We need to make sure that it is out of the way of the program
76 that it will "exec", and that there is sufficient room for the brk. */
77
78#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
79
80/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
81 now struct_user_regs, they are different) */
82
83#define ELF_CORE_COPY_REGS(pr_reg, regs) \
84 pr_reg[0] = regs->ebx; \
85 pr_reg[1] = regs->ecx; \
86 pr_reg[2] = regs->edx; \
87 pr_reg[3] = regs->esi; \
88 pr_reg[4] = regs->edi; \
89 pr_reg[5] = regs->ebp; \
90 pr_reg[6] = regs->eax; \
91 pr_reg[7] = regs->xds; \
92 pr_reg[8] = regs->xes; \
93 savesegment(fs,pr_reg[9]); \
Jeremy Fitzhardinge66e10a42006-12-07 02:14:02 +010094 pr_reg[10] = regs->xgs; \
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 pr_reg[11] = regs->orig_eax; \
96 pr_reg[12] = regs->eip; \
97 pr_reg[13] = regs->xcs; \
98 pr_reg[14] = regs->eflags; \
99 pr_reg[15] = regs->esp; \
100 pr_reg[16] = regs->xss;
101
102/* This yields a mask that user programs can use to figure out what
103 instruction set this CPU supports. This could be done in user space,
104 but it's not easy, and we've already done it here. */
105
106#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
107
108/* This yields a string that ld.so will use to load implementation
109 specific libraries for optimization. This is more specific in
110 intent than poking at uname or /proc/cpuinfo.
111
112 For the moment, we have only optimizations for the Intel generations,
113 but that could change... */
114
Serge E. Hallyne9ff3992006-10-02 02:18:11 -0700115#define ELF_PLATFORM (utsname()->machine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117#define SET_PERSONALITY(ex, ibcs2) do { } while (0)
118
119/*
120 * An executable for which elf_read_implies_exec() returns TRUE will
121 * have the READ_IMPLIES_EXEC personality flag set automatically.
122 */
123#define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
124
Tim Schmielau8c65b4a2005-11-07 00:59:43 -0800125struct task_struct;
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
128extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
129extern int dump_task_extended_fpu (struct task_struct *, struct user_fxsr_struct *);
130
131#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
132#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
133#define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
134
Ingo Molnare6e54942006-06-27 02:53:50 -0700135#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
136#define VDSO_BASE ((unsigned long)current->mm->context.vdso)
137
138#ifdef CONFIG_COMPAT_VDSO
139# define VDSO_COMPAT_BASE VDSO_HIGH_BASE
140# define VDSO_PRELINK VDSO_HIGH_BASE
141#else
142# define VDSO_COMPAT_BASE VDSO_BASE
143# define VDSO_PRELINK 0
144#endif
145
Ingo Molnare6e54942006-06-27 02:53:50 -0700146#define VDSO_SYM(x) \
Roland McGratha1f3bb92007-01-26 00:56:46 -0800147 (VDSO_COMPAT_BASE + (unsigned long)(x) - VDSO_PRELINK)
Ingo Molnare6e54942006-06-27 02:53:50 -0700148
149#define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE)
150#define VDSO_EHDR ((const struct elfhdr *) VDSO_COMPAT_BASE)
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152extern void __kernel_vsyscall;
153
Ingo Molnare6e54942006-06-27 02:53:50 -0700154#define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall)
155
Roland McGratha1f3bb92007-01-26 00:56:46 -0800156#ifndef CONFIG_COMPAT_VDSO
Ingo Molnare6e54942006-06-27 02:53:50 -0700157#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
158struct linux_binprm;
159extern int arch_setup_additional_pages(struct linux_binprm *bprm,
160 int executable_stack);
Roland McGratha1f3bb92007-01-26 00:56:46 -0800161#endif
Ingo Molnare6e54942006-06-27 02:53:50 -0700162
163extern unsigned int vdso_enabled;
164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165#define ARCH_DLINFO \
Ingo Molnare6e54942006-06-27 02:53:50 -0700166do if (vdso_enabled) { \
167 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
168 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_COMPAT_BASE); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169} while (0)
170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171#endif
172
173#endif