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-rw-r--r--arch/x86/include/asm/elf.h336
1 files changed, 336 insertions, 0 deletions
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
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+++ b/arch/x86/include/asm/elf.h
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1#ifndef ASM_X86__ELF_H
2#define ASM_X86__ELF_H
3
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
14#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
15typedef 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
43#else
44
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
75#include <asm/vdso.h>
76
77extern unsigned int vdso_enabled;
78
79/*
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
85#include <asm/processor.h>
86#include <asm/system.h>
87
88#ifdef CONFIG_X86_32
89#include <asm/desc.h>
90
91#define elf_check_arch(x) elf_check_arch_ia32(x)
92
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 */
103#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; \
108} while (0)
109
110/*
111 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
112 * now struct_user_regs, they are different)
113 */
114
115#define ELF_CORE_COPY_REGS(pr_reg, regs) \
116do { \
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; \
127 savesegment(gs, pr_reg[10]); \
128 pr_reg[11] = regs->orig_ax; \
129 pr_reg[12] = regs->ip; \
130 pr_reg[13] = regs->cs & 0xffff; \
131 pr_reg[14] = regs->flags; \
132 pr_reg[15] = regs->sp; \
133 pr_reg[16] = regs->ss & 0xffff; \
134} while (0);
135
136#define ELF_PLATFORM (utsname()->machine)
137#define set_personality_64bit() do { } while (0)
138
139#else /* CONFIG_X86_32 */
140
141/*
142 * This is used to ensure we don't load something for the wrong architecture.
143 */
144#define elf_check_arch(x) \
145 ((x)->e_machine == EM_X86_64)
146
147#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
148
149static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
150{
151 loadsegment(fs, 0);
152 loadsegment(ds, __USER32_DS);
153 loadsegment(es, __USER32_DS);
154 load_gs_index(0);
155 regs->ip = ip;
156 regs->sp = sp;
157 regs->flags = X86_EFLAGS_IF;
158 regs->cs = __USER32_CS;
159 regs->ss = __USER32_DS;
160}
161
162static inline void elf_common_init(struct thread_struct *t,
163 struct pt_regs *regs, const u16 ds)
164{
165 regs->ax = regs->bx = regs->cx = regs->dx = 0;
166 regs->si = regs->di = regs->bp = 0;
167 regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
168 regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
169 t->fs = t->gs = 0;
170 t->fsindex = t->gsindex = 0;
171 t->ds = t->es = ds;
172}
173
174#define ELF_PLAT_INIT(_r, load_addr) \
175do { \
176 elf_common_init(&current->thread, _r, 0); \
177 clear_thread_flag(TIF_IA32); \
178} while (0)
179
180#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
181 elf_common_init(&current->thread, regs, __USER_DS)
182
183#define compat_start_thread(regs, ip, sp) \
184do { \
185 start_ia32_thread(regs, ip, sp); \
186 set_fs(USER_DS); \
187} while (0)
188
189#define COMPAT_SET_PERSONALITY(ex) \
190do { \
191 if (test_thread_flag(TIF_IA32)) \
192 clear_thread_flag(TIF_ABI_PENDING); \
193 else \
194 set_thread_flag(TIF_ABI_PENDING); \
195 current->personality |= force_personality32; \
196} while (0)
197
198#define COMPAT_ELF_PLATFORM ("i686")
199
200/*
201 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
202 * now struct_user_regs, they are different). Assumes current is the process
203 * getting dumped.
204 */
205
206#define ELF_CORE_COPY_REGS(pr_reg, regs) \
207do { \
208 unsigned v; \
209 (pr_reg)[0] = (regs)->r15; \
210 (pr_reg)[1] = (regs)->r14; \
211 (pr_reg)[2] = (regs)->r13; \
212 (pr_reg)[3] = (regs)->r12; \
213 (pr_reg)[4] = (regs)->bp; \
214 (pr_reg)[5] = (regs)->bx; \
215 (pr_reg)[6] = (regs)->r11; \
216 (pr_reg)[7] = (regs)->r10; \
217 (pr_reg)[8] = (regs)->r9; \
218 (pr_reg)[9] = (regs)->r8; \
219 (pr_reg)[10] = (regs)->ax; \
220 (pr_reg)[11] = (regs)->cx; \
221 (pr_reg)[12] = (regs)->dx; \
222 (pr_reg)[13] = (regs)->si; \
223 (pr_reg)[14] = (regs)->di; \
224 (pr_reg)[15] = (regs)->orig_ax; \
225 (pr_reg)[16] = (regs)->ip; \
226 (pr_reg)[17] = (regs)->cs; \
227 (pr_reg)[18] = (regs)->flags; \
228 (pr_reg)[19] = (regs)->sp; \
229 (pr_reg)[20] = (regs)->ss; \
230 (pr_reg)[21] = current->thread.fs; \
231 (pr_reg)[22] = current->thread.gs; \
232 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
233 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
234 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
235 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
236} while (0);
237
238/* I'm not sure if we can use '-' here */
239#define ELF_PLATFORM ("x86_64")
240extern void set_personality_64bit(void);
241extern unsigned int sysctl_vsyscall32;
242extern int force_personality32;
243
244#endif /* !CONFIG_X86_32 */
245
246#define CORE_DUMP_USE_REGSET
247#define USE_ELF_CORE_DUMP
248#define ELF_EXEC_PAGESIZE 4096
249
250/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
251 use of this is to invoke "./ld.so someprog" to test out a new version of
252 the loader. We need to make sure that it is out of the way of the program
253 that it will "exec", and that there is sufficient room for the brk. */
254
255#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
256
257/* This yields a mask that user programs can use to figure out what
258 instruction set this CPU supports. This could be done in user space,
259 but it's not easy, and we've already done it here. */
260
261#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
262
263/* This yields a string that ld.so will use to load implementation
264 specific libraries for optimization. This is more specific in
265 intent than poking at uname or /proc/cpuinfo.
266
267 For the moment, we have only optimizations for the Intel generations,
268 but that could change... */
269
270#define SET_PERSONALITY(ex) set_personality_64bit()
271
272/*
273 * An executable for which elf_read_implies_exec() returns TRUE will
274 * have the READ_IMPLIES_EXEC personality flag set automatically.
275 */
276#define elf_read_implies_exec(ex, executable_stack) \
277 (executable_stack != EXSTACK_DISABLE_X)
278
279struct task_struct;
280
281#define ARCH_DLINFO_IA32(vdso_enabled) \
282do { \
283 if (vdso_enabled) { \
284 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
285 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
286 } \
287} while (0)
288
289#ifdef CONFIG_X86_32
290
291#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
292
293#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
294
295/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
296
297#else /* CONFIG_X86_32 */
298
299#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
300
301/* 1GB for 64bit, 8MB for 32bit */
302#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
303
304#define ARCH_DLINFO \
305do { \
306 if (vdso_enabled) \
307 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
308 (unsigned long)current->mm->context.vdso); \
309} while (0)
310
311#define AT_SYSINFO 32
312
313#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
314
315#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
316
317#endif /* !CONFIG_X86_32 */
318
319#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
320
321#define VDSO_ENTRY \
322 ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
323
324struct linux_binprm;
325
326#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
327extern int arch_setup_additional_pages(struct linux_binprm *bprm,
328 int executable_stack);
329
330extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
331#define compat_arch_setup_additional_pages syscall32_setup_pages
332
333extern unsigned long arch_randomize_brk(struct mm_struct *mm);
334#define arch_randomize_brk arch_randomize_brk
335
336#endif /* ASM_X86__ELF_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 22:28:55 -0500