blob: a406fcb1e924bbccb68aa69253292b5117a33f32 [file] [log] [blame]
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010
11/* x86-64 relocation types */
12#define R_X86_64_NONE 0 /* No reloc */
13#define R_X86_64_64 1 /* Direct 64 bit */
14#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
15#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
16#define R_X86_64_PLT32 4 /* 32 bit PLT address */
17#define R_X86_64_COPY 5 /* Copy symbol at runtime */
18#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
19#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
20#define R_X86_64_RELATIVE 8 /* Adjust by program base */
21#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
22 offset to GOT */
23#define R_X86_64_32 10 /* Direct 32 bit zero extended */
24#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
25#define R_X86_64_16 12 /* Direct 16 bit zero extended */
26#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
27#define R_X86_64_8 14 /* Direct 8 bit sign extended */
28#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
29
30#define R_X86_64_NUM 16
31
32typedef unsigned long elf_greg_t;
33
34#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
35typedef elf_greg_t elf_gregset_t[ELF_NGREG];
36
37typedef struct user_i387_struct elf_fpregset_t;
38
39/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 * These are used to set parameters in the core dumps.
41 */
42#define ELF_CLASS ELFCLASS64
43#define ELF_DATA ELFDATA2LSB
44#define ELF_ARCH EM_X86_64
45
David Woodhouse75da7362006-09-16 12:15:48 -070046#ifdef __KERNEL__
47#include <asm/processor.h>
48#include <asm/compat.h>
49
50/*
51 * This is used to ensure we don't load something for the wrong architecture.
52 */
53#define elf_check_arch(x) \
54 ((x)->e_machine == EM_X86_64)
55
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
58 contains a pointer to a function which might be registered using `atexit'.
59 This provides a mean for the dynamic linker to call DT_FINI functions for
60 shared libraries that have been loaded before the code runs.
61
62 A value of 0 tells we have no such handler.
63
64 We might as well make sure everything else is cleared too (except for %esp),
65 just to make things more deterministic.
66 */
67#define ELF_PLAT_INIT(_r, load_addr) do { \
68 struct task_struct *cur = current; \
69 (_r)->rbx = 0; (_r)->rcx = 0; (_r)->rdx = 0; \
70 (_r)->rsi = 0; (_r)->rdi = 0; (_r)->rbp = 0; \
71 (_r)->rax = 0; \
72 (_r)->r8 = 0; \
73 (_r)->r9 = 0; \
74 (_r)->r10 = 0; \
75 (_r)->r11 = 0; \
76 (_r)->r12 = 0; \
77 (_r)->r13 = 0; \
78 (_r)->r14 = 0; \
79 (_r)->r15 = 0; \
80 cur->thread.fs = 0; cur->thread.gs = 0; \
81 cur->thread.fsindex = 0; cur->thread.gsindex = 0; \
82 cur->thread.ds = 0; cur->thread.es = 0; \
83 clear_thread_flag(TIF_IA32); \
84} while (0)
85
86#define USE_ELF_CORE_DUMP
87#define ELF_EXEC_PAGESIZE 4096
88
89/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
90 use of this is to invoke "./ld.so someprog" to test out a new version of
91 the loader. We need to make sure that it is out of the way of the program
92 that it will "exec", and that there is sufficient room for the brk. */
93
94#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
95
96/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
97 now struct_user_regs, they are different). Assumes current is the process
98 getting dumped. */
99
100#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
101 unsigned v; \
102 (pr_reg)[0] = (regs)->r15; \
103 (pr_reg)[1] = (regs)->r14; \
104 (pr_reg)[2] = (regs)->r13; \
105 (pr_reg)[3] = (regs)->r12; \
106 (pr_reg)[4] = (regs)->rbp; \
107 (pr_reg)[5] = (regs)->rbx; \
108 (pr_reg)[6] = (regs)->r11; \
109 (pr_reg)[7] = (regs)->r10; \
110 (pr_reg)[8] = (regs)->r9; \
111 (pr_reg)[9] = (regs)->r8; \
112 (pr_reg)[10] = (regs)->rax; \
113 (pr_reg)[11] = (regs)->rcx; \
114 (pr_reg)[12] = (regs)->rdx; \
115 (pr_reg)[13] = (regs)->rsi; \
116 (pr_reg)[14] = (regs)->rdi; \
117 (pr_reg)[15] = (regs)->orig_rax; \
118 (pr_reg)[16] = (regs)->rip; \
119 (pr_reg)[17] = (regs)->cs; \
120 (pr_reg)[18] = (regs)->eflags; \
121 (pr_reg)[19] = (regs)->rsp; \
122 (pr_reg)[20] = (regs)->ss; \
123 (pr_reg)[21] = current->thread.fs; \
124 (pr_reg)[22] = current->thread.gs; \
125 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
126 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
127 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
128 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
129} while(0);
130
131/* This yields a mask that user programs can use to figure out what
132 instruction set this CPU supports. This could be done in user space,
133 but it's not easy, and we've already done it here. */
134
135#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
136
137/* This yields a string that ld.so will use to load implementation
138 specific libraries for optimization. This is more specific in
139 intent than poking at uname or /proc/cpuinfo.
140
141 For the moment, we have only optimizations for the Intel generations,
142 but that could change... */
143
144/* I'm not sure if we can use '-' here */
145#define ELF_PLATFORM ("x86_64")
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147extern void set_personality_64bit(void);
148#define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()
149/*
150 * An executable for which elf_read_implies_exec() returns TRUE will
151 * have the READ_IMPLIES_EXEC personality flag set automatically.
152 */
153#define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
154
Tim Schmielau8c65b4a2005-11-07 00:59:43 -0800155struct task_struct;
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
158extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
159
160#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
161#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
162
Andi Kleen913bd902006-03-25 16:29:09 +0100163/* 1GB for 64bit, 8MB for 32bit */
Andi Kleen6ae53cd2006-05-30 22:47:45 +0200164#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
Andi Kleen913bd902006-03-25 16:29:09 +0100165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166#endif
167
168#endif