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H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_ELF_H
2#define _ASM_X86_ELF_H
Thomas Gleixner2439a792007-10-23 22:37:23 +02003
4/*
5 * ELF register definitions..
6 */
7
8#include <asm/ptrace.h>
9#include <asm/user.h>
10#include <asm/auxvec.h>
11
12typedef unsigned long elf_greg_t;
13
Joe Perches486386f2008-03-23 01:02:08 -070014#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
Thomas Gleixner2439a792007-10-23 22:37:23 +020015typedef elf_greg_t elf_gregset_t[ELF_NGREG];
16
17typedef struct user_i387_struct elf_fpregset_t;
18
19#ifdef __i386__
20
21typedef struct user_fxsr_struct elf_fpxregset_t;
22
23#define R_386_NONE 0
24#define R_386_32 1
25#define R_386_PC32 2
26#define R_386_GOT32 3
27#define R_386_PLT32 4
28#define R_386_COPY 5
29#define R_386_GLOB_DAT 6
30#define R_386_JMP_SLOT 7
31#define R_386_RELATIVE 8
32#define R_386_GOTOFF 9
33#define R_386_GOTPC 10
34#define R_386_NUM 11
35
36/*
37 * These are used to set parameters in the core dumps.
38 */
39#define ELF_CLASS ELFCLASS32
40#define ELF_DATA ELFDATA2LSB
41#define ELF_ARCH EM_386
42
Thomas Gleixner96a388d2007-10-11 11:20:03 +020043#else
Thomas Gleixner2439a792007-10-23 22:37:23 +020044
45/* x86-64 relocation types */
46#define R_X86_64_NONE 0 /* No reloc */
47#define R_X86_64_64 1 /* Direct 64 bit */
48#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
49#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
50#define R_X86_64_PLT32 4 /* 32 bit PLT address */
51#define R_X86_64_COPY 5 /* Copy symbol at runtime */
52#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
53#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
54#define R_X86_64_RELATIVE 8 /* Adjust by program base */
55#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
56 offset to GOT */
57#define R_X86_64_32 10 /* Direct 32 bit zero extended */
58#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
59#define R_X86_64_16 12 /* Direct 16 bit zero extended */
60#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
61#define R_X86_64_8 14 /* Direct 8 bit sign extended */
62#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
63
64#define R_X86_64_NUM 16
65
66/*
67 * These are used to set parameters in the core dumps.
68 */
69#define ELF_CLASS ELFCLASS64
70#define ELF_DATA ELFDATA2LSB
71#define ELF_ARCH EM_X86_64
72
73#endif
74
Roland McGratha97f52e2008-01-30 13:31:55 +010075#include <asm/vdso.h>
76
77extern unsigned int vdso_enabled;
Thomas Gleixner2439a792007-10-23 22:37:23 +020078
Roland McGrathaf65d642008-01-30 13:30:43 +010079/*
80 * This is used to ensure we don't load something for the wrong architecture.
81 */
82#define elf_check_arch_ia32(x) \
83 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
84
Thomas Gleixner2439a792007-10-23 22:37:23 +020085#include <asm/processor.h>
Jeremy Fitzhardinge9f9d4892008-06-25 00:19:32 -040086#include <asm/system.h>
Joe Perchese40c0fe2008-03-09 12:35:00 -070087
88#ifdef CONFIG_X86_32
Thomas Gleixner2439a792007-10-23 22:37:23 +020089#include <asm/desc.h>
90
Roland McGrathaf65d642008-01-30 13:30:43 +010091#define elf_check_arch(x) elf_check_arch_ia32(x)
Thomas Gleixner2439a792007-10-23 22:37:23 +020092
93/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
94 contains a pointer to a function which might be registered using `atexit'.
95 This provides a mean for the dynamic linker to call DT_FINI functions for
96 shared libraries that have been loaded before the code runs.
97
98 A value of 0 tells we have no such handler.
99
100 We might as well make sure everything else is cleared too (except for %esp),
101 just to make things more deterministic.
102 */
Joe Perches486386f2008-03-23 01:02:08 -0700103#define ELF_PLAT_INIT(_r, load_addr) \
104 do { \
105 _r->bx = 0; _r->cx = 0; _r->dx = 0; \
106 _r->si = 0; _r->di = 0; _r->bp = 0; \
107 _r->ax = 0; \
Thomas Gleixner2439a792007-10-23 22:37:23 +0200108} while (0)
109
Hiroshi Shimamoto06495472008-01-30 13:33:16 +0100110/*
111 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
112 * now struct_user_regs, they are different)
113 */
114
Tejun Heoccbeed32009-02-09 22:17:40 +0900115#define ELF_CORE_COPY_REGS_COMMON(pr_reg, regs) \
Joe Perches486386f2008-03-23 01:02:08 -0700116do { \
117 pr_reg[0] = regs->bx; \
118 pr_reg[1] = regs->cx; \
119 pr_reg[2] = regs->dx; \
120 pr_reg[3] = regs->si; \
121 pr_reg[4] = regs->di; \
122 pr_reg[5] = regs->bp; \
123 pr_reg[6] = regs->ax; \
124 pr_reg[7] = regs->ds & 0xffff; \
125 pr_reg[8] = regs->es & 0xffff; \
126 pr_reg[9] = regs->fs & 0xffff; \
Joe Perches486386f2008-03-23 01:02:08 -0700127 pr_reg[11] = regs->orig_ax; \
128 pr_reg[12] = regs->ip; \
129 pr_reg[13] = regs->cs & 0xffff; \
130 pr_reg[14] = regs->flags; \
131 pr_reg[15] = regs->sp; \
132 pr_reg[16] = regs->ss & 0xffff; \
Hiroshi Shimamoto06495472008-01-30 13:33:16 +0100133} while (0);
134
Tejun Heoccbeed32009-02-09 22:17:40 +0900135#define ELF_CORE_COPY_REGS(pr_reg, regs) \
136do { \
137 ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
138 pr_reg[10] = get_user_gs(regs); \
139} while (0);
140
141#define ELF_CORE_COPY_KERNEL_REGS(pr_reg, regs) \
142do { \
143 ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
144 savesegment(gs, pr_reg[10]); \
145} while (0);
146
Thomas Gleixner2439a792007-10-23 22:37:23 +0200147#define ELF_PLATFORM (utsname()->machine)
148#define set_personality_64bit() do { } while (0)
Thomas Gleixner2439a792007-10-23 22:37:23 +0200149
150#else /* CONFIG_X86_32 */
151
Thomas Gleixner2439a792007-10-23 22:37:23 +0200152/*
153 * This is used to ensure we don't load something for the wrong architecture.
154 */
Joe Perches486386f2008-03-23 01:02:08 -0700155#define elf_check_arch(x) \
Thomas Gleixner2439a792007-10-23 22:37:23 +0200156 ((x)->e_machine == EM_X86_64)
157
Roland McGratha97f52e2008-01-30 13:31:55 +0100158#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
159
160static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
161{
Jeremy Fitzhardingeb6edbb12008-08-19 13:04:19 -0700162 loadsegment(fs, 0);
163 loadsegment(ds, __USER32_DS);
164 loadsegment(es, __USER32_DS);
Roland McGratha97f52e2008-01-30 13:31:55 +0100165 load_gs_index(0);
166 regs->ip = ip;
167 regs->sp = sp;
168 regs->flags = X86_EFLAGS_IF;
169 regs->cs = __USER32_CS;
170 regs->ss = __USER32_DS;
171}
172
173static inline void elf_common_init(struct thread_struct *t,
174 struct pt_regs *regs, const u16 ds)
175{
176 regs->ax = regs->bx = regs->cx = regs->dx = 0;
177 regs->si = regs->di = regs->bp = 0;
178 regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
179 regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
180 t->fs = t->gs = 0;
181 t->fsindex = t->gsindex = 0;
182 t->ds = t->es = ds;
183}
184
Joe Perches486386f2008-03-23 01:02:08 -0700185#define ELF_PLAT_INIT(_r, load_addr) \
186do { \
187 elf_common_init(&current->thread, _r, 0); \
188 clear_thread_flag(TIF_IA32); \
Thomas Gleixner2439a792007-10-23 22:37:23 +0200189} while (0)
190
Joe Perches486386f2008-03-23 01:02:08 -0700191#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
Roland McGratha97f52e2008-01-30 13:31:55 +0100192 elf_common_init(&current->thread, regs, __USER_DS)
Joe Perches486386f2008-03-23 01:02:08 -0700193
194#define compat_start_thread(regs, ip, sp) \
195do { \
196 start_ia32_thread(regs, ip, sp); \
197 set_fs(USER_DS); \
198} while (0)
199
Martin Schwidefsky0b592682008-10-16 15:39:57 +0200200#define COMPAT_SET_PERSONALITY(ex) \
Joe Perches486386f2008-03-23 01:02:08 -0700201do { \
202 if (test_thread_flag(TIF_IA32)) \
203 clear_thread_flag(TIF_ABI_PENDING); \
204 else \
205 set_thread_flag(TIF_ABI_PENDING); \
206 current->personality |= force_personality32; \
207} while (0)
208
Roland McGratha97f52e2008-01-30 13:31:55 +0100209#define COMPAT_ELF_PLATFORM ("i686")
210
Hiroshi Shimamoto06495472008-01-30 13:33:16 +0100211/*
212 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
213 * now struct_user_regs, they are different). Assumes current is the process
214 * getting dumped.
215 */
216
Joe Perches486386f2008-03-23 01:02:08 -0700217#define ELF_CORE_COPY_REGS(pr_reg, regs) \
218do { \
Hiroshi Shimamoto06495472008-01-30 13:33:16 +0100219 unsigned v; \
220 (pr_reg)[0] = (regs)->r15; \
221 (pr_reg)[1] = (regs)->r14; \
222 (pr_reg)[2] = (regs)->r13; \
223 (pr_reg)[3] = (regs)->r12; \
224 (pr_reg)[4] = (regs)->bp; \
225 (pr_reg)[5] = (regs)->bx; \
226 (pr_reg)[6] = (regs)->r11; \
227 (pr_reg)[7] = (regs)->r10; \
228 (pr_reg)[8] = (regs)->r9; \
229 (pr_reg)[9] = (regs)->r8; \
230 (pr_reg)[10] = (regs)->ax; \
231 (pr_reg)[11] = (regs)->cx; \
232 (pr_reg)[12] = (regs)->dx; \
233 (pr_reg)[13] = (regs)->si; \
234 (pr_reg)[14] = (regs)->di; \
235 (pr_reg)[15] = (regs)->orig_ax; \
236 (pr_reg)[16] = (regs)->ip; \
237 (pr_reg)[17] = (regs)->cs; \
238 (pr_reg)[18] = (regs)->flags; \
239 (pr_reg)[19] = (regs)->sp; \
240 (pr_reg)[20] = (regs)->ss; \
241 (pr_reg)[21] = current->thread.fs; \
242 (pr_reg)[22] = current->thread.gs; \
243 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
244 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
245 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
246 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
247} while (0);
248
Thomas Gleixner2439a792007-10-23 22:37:23 +0200249/* I'm not sure if we can use '-' here */
250#define ELF_PLATFORM ("x86_64")
251extern void set_personality_64bit(void);
Roland McGratha97f52e2008-01-30 13:31:55 +0100252extern unsigned int sysctl_vsyscall32;
253extern int force_personality32;
Thomas Gleixner2439a792007-10-23 22:37:23 +0200254
255#endif /* !CONFIG_X86_32 */
256
Roland McGrath975511b2008-01-30 13:31:54 +0100257#define CORE_DUMP_USE_REGSET
Thomas Gleixner2439a792007-10-23 22:37:23 +0200258#define USE_ELF_CORE_DUMP
259#define ELF_EXEC_PAGESIZE 4096
260
261/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
262 use of this is to invoke "./ld.so someprog" to test out a new version of
263 the loader. We need to make sure that it is out of the way of the program
264 that it will "exec", and that there is sufficient room for the brk. */
265
266#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
267
268/* This yields a mask that user programs can use to figure out what
269 instruction set this CPU supports. This could be done in user space,
270 but it's not easy, and we've already done it here. */
271
272#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
273
274/* This yields a string that ld.so will use to load implementation
275 specific libraries for optimization. This is more specific in
276 intent than poking at uname or /proc/cpuinfo.
277
278 For the moment, we have only optimizations for the Intel generations,
279 but that could change... */
280
Martin Schwidefsky0b592682008-10-16 15:39:57 +0200281#define SET_PERSONALITY(ex) set_personality_64bit()
Thomas Gleixner2439a792007-10-23 22:37:23 +0200282
283/*
284 * An executable for which elf_read_implies_exec() returns TRUE will
285 * have the READ_IMPLIES_EXEC personality flag set automatically.
286 */
287#define elf_read_implies_exec(ex, executable_stack) \
288 (executable_stack != EXSTACK_DISABLE_X)
289
290struct task_struct;
291
Joe Perches486386f2008-03-23 01:02:08 -0700292#define ARCH_DLINFO_IA32(vdso_enabled) \
293do { \
294 if (vdso_enabled) { \
Thomas Gleixner2439a792007-10-23 22:37:23 +0200295 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
296 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
Joe Perches486386f2008-03-23 01:02:08 -0700297 } \
Thomas Gleixner2439a792007-10-23 22:37:23 +0200298} while (0)
299
Roland McGratha97f52e2008-01-30 13:31:55 +0100300#ifdef CONFIG_X86_32
301
Michal Hocko80938332009-09-08 11:01:55 +0200302#define STACK_RND_MASK (0x7ff)
303
Roland McGratha97f52e2008-01-30 13:31:55 +0100304#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
305
306#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
307
308/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
309
Thomas Gleixner2439a792007-10-23 22:37:23 +0200310#else /* CONFIG_X86_32 */
311
Roland McGrathaf65d642008-01-30 13:30:43 +0100312#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
313
Thomas Gleixner2439a792007-10-23 22:37:23 +0200314/* 1GB for 64bit, 8MB for 32bit */
315#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
316
Joe Perches486386f2008-03-23 01:02:08 -0700317#define ARCH_DLINFO \
318do { \
319 if (vdso_enabled) \
320 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
321 (unsigned long)current->mm->context.vdso); \
Thomas Gleixner2439a792007-10-23 22:37:23 +0200322} while (0)
323
Roland McGratha97f52e2008-01-30 13:31:55 +0100324#define AT_SYSINFO 32
325
326#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
327
328#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
329
Thomas Gleixner2439a792007-10-23 22:37:23 +0200330#endif /* !CONFIG_X86_32 */
331
Roland McGrathaf65d642008-01-30 13:30:43 +0100332#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
333
Joe Perches486386f2008-03-23 01:02:08 -0700334#define VDSO_ENTRY \
335 ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
Roland McGrathaf65d642008-01-30 13:30:43 +0100336
Thomas Gleixner2439a792007-10-23 22:37:23 +0200337struct linux_binprm;
338
339#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
340extern int arch_setup_additional_pages(struct linux_binprm *bprm,
Martin Schwidefskyfc5243d2008-12-25 13:38:35 +0100341 int uses_interp);
Thomas Gleixner2439a792007-10-23 22:37:23 +0200342
Roland McGratha97f52e2008-01-30 13:31:55 +0100343extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
344#define compat_arch_setup_additional_pages syscall32_setup_pages
345
Jiri Kosinac1d171a2008-01-30 13:30:40 +0100346extern unsigned long arch_randomize_brk(struct mm_struct *mm);
347#define arch_randomize_brk arch_randomize_brk
348
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700349#endif /* _ASM_X86_ELF_H */