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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASM_X86_64_ELF_H
2#define __ASM_X86_64_ELF_H
3
4/*
5 * ELF register definitions..
6 */
7
8#include <asm/ptrace.h>
9#include <asm/user.h>
10#include <asm/processor.h>
11
12/* x86-64 relocation types */
13#define R_X86_64_NONE 0 /* No reloc */
14#define R_X86_64_64 1 /* Direct 64 bit */
15#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
16#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
17#define R_X86_64_PLT32 4 /* 32 bit PLT address */
18#define R_X86_64_COPY 5 /* Copy symbol at runtime */
19#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
20#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
21#define R_X86_64_RELATIVE 8 /* Adjust by program base */
22#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
23 offset to GOT */
24#define R_X86_64_32 10 /* Direct 32 bit zero extended */
25#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
26#define R_X86_64_16 12 /* Direct 16 bit zero extended */
27#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
28#define R_X86_64_8 14 /* Direct 8 bit sign extended */
29#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
30
31#define R_X86_64_NUM 16
32
33typedef unsigned long elf_greg_t;
34
35#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
36typedef elf_greg_t elf_gregset_t[ELF_NGREG];
37
38typedef struct user_i387_struct elf_fpregset_t;
39
40/*
41 * This is used to ensure we don't load something for the wrong architecture.
42 */
43#define elf_check_arch(x) \
44 ((x)->e_machine == EM_X86_64)
45
46/*
47 * These are used to set parameters in the core dumps.
48 */
49#define ELF_CLASS ELFCLASS64
50#define ELF_DATA ELFDATA2LSB
51#define ELF_ARCH EM_X86_64
52
53/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
54 contains a pointer to a function which might be registered using `atexit'.
55 This provides a mean for the dynamic linker to call DT_FINI functions for
56 shared libraries that have been loaded before the code runs.
57
58 A value of 0 tells we have no such handler.
59
60 We might as well make sure everything else is cleared too (except for %esp),
61 just to make things more deterministic.
62 */
63#define ELF_PLAT_INIT(_r, load_addr) do { \
64 struct task_struct *cur = current; \
65 (_r)->rbx = 0; (_r)->rcx = 0; (_r)->rdx = 0; \
66 (_r)->rsi = 0; (_r)->rdi = 0; (_r)->rbp = 0; \
67 (_r)->rax = 0; \
68 (_r)->r8 = 0; \
69 (_r)->r9 = 0; \
70 (_r)->r10 = 0; \
71 (_r)->r11 = 0; \
72 (_r)->r12 = 0; \
73 (_r)->r13 = 0; \
74 (_r)->r14 = 0; \
75 (_r)->r15 = 0; \
76 cur->thread.fs = 0; cur->thread.gs = 0; \
77 cur->thread.fsindex = 0; cur->thread.gsindex = 0; \
78 cur->thread.ds = 0; cur->thread.es = 0; \
79 clear_thread_flag(TIF_IA32); \
80} while (0)
81
82#define USE_ELF_CORE_DUMP
83#define ELF_EXEC_PAGESIZE 4096
84
85/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
86 use of this is to invoke "./ld.so someprog" to test out a new version of
87 the loader. We need to make sure that it is out of the way of the program
88 that it will "exec", and that there is sufficient room for the brk. */
89
90#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
91
92/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
93 now struct_user_regs, they are different). Assumes current is the process
94 getting dumped. */
95
96#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
97 unsigned v; \
98 (pr_reg)[0] = (regs)->r15; \
99 (pr_reg)[1] = (regs)->r14; \
100 (pr_reg)[2] = (regs)->r13; \
101 (pr_reg)[3] = (regs)->r12; \
102 (pr_reg)[4] = (regs)->rbp; \
103 (pr_reg)[5] = (regs)->rbx; \
104 (pr_reg)[6] = (regs)->r11; \
105 (pr_reg)[7] = (regs)->r10; \
106 (pr_reg)[8] = (regs)->r9; \
107 (pr_reg)[9] = (regs)->r8; \
108 (pr_reg)[10] = (regs)->rax; \
109 (pr_reg)[11] = (regs)->rcx; \
110 (pr_reg)[12] = (regs)->rdx; \
111 (pr_reg)[13] = (regs)->rsi; \
112 (pr_reg)[14] = (regs)->rdi; \
113 (pr_reg)[15] = (regs)->orig_rax; \
114 (pr_reg)[16] = (regs)->rip; \
115 (pr_reg)[17] = (regs)->cs; \
116 (pr_reg)[18] = (regs)->eflags; \
117 (pr_reg)[19] = (regs)->rsp; \
118 (pr_reg)[20] = (regs)->ss; \
119 (pr_reg)[21] = current->thread.fs; \
120 (pr_reg)[22] = current->thread.gs; \
121 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
122 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
123 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
124 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
125} while(0);
126
127/* This yields a mask that user programs can use to figure out what
128 instruction set this CPU supports. This could be done in user space,
129 but it's not easy, and we've already done it here. */
130
131#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
132
133/* This yields a string that ld.so will use to load implementation
134 specific libraries for optimization. This is more specific in
135 intent than poking at uname or /proc/cpuinfo.
136
137 For the moment, we have only optimizations for the Intel generations,
138 but that could change... */
139
140/* I'm not sure if we can use '-' here */
141#define ELF_PLATFORM ("x86_64")
142
143#ifdef __KERNEL__
144extern void set_personality_64bit(void);
145#define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()
146/*
147 * An executable for which elf_read_implies_exec() returns TRUE will
148 * have the READ_IMPLIES_EXEC personality flag set automatically.
149 */
150#define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
151
152extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
153extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
154
155#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
156#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
157
158#endif
159
160#endif