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1965aae3 PA |
1 | #ifndef _ASM_X86_ELF_H |
2 | #define _ASM_X86_ELF_H | |
2439a791 TG |
3 | |
4 | /* | |
5 | * ELF register definitions.. | |
6 | */ | |
7 | ||
8 | #include <asm/ptrace.h> | |
9 | #include <asm/user.h> | |
10 | #include <asm/auxvec.h> | |
11 | ||
12 | typedef unsigned long elf_greg_t; | |
13 | ||
486386f6 | 14 | #define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t)) |
2439a791 TG |
15 | typedef elf_greg_t elf_gregset_t[ELF_NGREG]; |
16 | ||
17 | typedef struct user_i387_struct elf_fpregset_t; | |
18 | ||
19 | #ifdef __i386__ | |
20 | ||
21 | typedef 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 | ||
96a388de | 43 | #else |
2439a791 TG |
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 | ||
a97f52e6 RM |
75 | #include <asm/vdso.h> |
76 | ||
77 | extern unsigned int vdso_enabled; | |
2439a791 | 78 | |
af65d648 RM |
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 | ||
2439a791 | 85 | #include <asm/processor.h> |
9f9d489a | 86 | #include <asm/system.h> |
e40c0fe6 JP |
87 | |
88 | #ifdef CONFIG_X86_32 | |
2439a791 TG |
89 | #include <asm/desc.h> |
90 | ||
af65d648 | 91 | #define elf_check_arch(x) elf_check_arch_ia32(x) |
2439a791 TG |
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 | */ | |
486386f6 JP |
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; \ | |
2439a791 TG |
108 | } while (0) |
109 | ||
06495476 HS |
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 | ||
ccbeed3a | 115 | #define ELF_CORE_COPY_REGS_COMMON(pr_reg, regs) \ |
486386f6 JP |
116 | do { \ |
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; \ | |
486386f6 JP |
127 | 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; \ | |
06495476 HS |
133 | } while (0); |
134 | ||
ccbeed3a TH |
135 | #define ELF_CORE_COPY_REGS(pr_reg, regs) \ |
136 | do { \ | |
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) \ | |
142 | do { \ | |
143 | ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\ | |
144 | savesegment(gs, pr_reg[10]); \ | |
145 | } while (0); | |
146 | ||
2439a791 TG |
147 | #define ELF_PLATFORM (utsname()->machine) |
148 | #define set_personality_64bit() do { } while (0) | |
2439a791 TG |
149 | |
150 | #else /* CONFIG_X86_32 */ | |
151 | ||
2439a791 TG |
152 | /* |
153 | * This is used to ensure we don't load something for the wrong architecture. | |
154 | */ | |
486386f6 | 155 | #define elf_check_arch(x) \ |
2439a791 TG |
156 | ((x)->e_machine == EM_X86_64) |
157 | ||
a97f52e6 RM |
158 | #define compat_elf_check_arch(x) elf_check_arch_ia32(x) |
159 | ||
a97f52e6 RM |
160 | static inline void elf_common_init(struct thread_struct *t, |
161 | struct pt_regs *regs, const u16 ds) | |
162 | { | |
163 | regs->ax = regs->bx = regs->cx = regs->dx = 0; | |
164 | regs->si = regs->di = regs->bp = 0; | |
165 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0; | |
166 | regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; | |
167 | t->fs = t->gs = 0; | |
168 | t->fsindex = t->gsindex = 0; | |
169 | t->ds = t->es = ds; | |
170 | } | |
171 | ||
486386f6 JP |
172 | #define ELF_PLAT_INIT(_r, load_addr) \ |
173 | do { \ | |
174 | elf_common_init(¤t->thread, _r, 0); \ | |
175 | clear_thread_flag(TIF_IA32); \ | |
2439a791 TG |
176 | } while (0) |
177 | ||
486386f6 | 178 | #define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ |
a97f52e6 | 179 | elf_common_init(¤t->thread, regs, __USER_DS) |
486386f6 | 180 | |
a6f05a6a PA |
181 | void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp); |
182 | #define compat_start_thread start_thread_ia32 | |
486386f6 | 183 | |
05d43ed8 PA |
184 | void set_personality_ia32(void); |
185 | #define COMPAT_SET_PERSONALITY(ex) set_personality_ia32() | |
486386f6 | 186 | |
a97f52e6 RM |
187 | #define COMPAT_ELF_PLATFORM ("i686") |
188 | ||
06495476 HS |
189 | /* |
190 | * regs is struct pt_regs, pr_reg is elf_gregset_t (which is | |
191 | * now struct_user_regs, they are different). Assumes current is the process | |
192 | * getting dumped. | |
193 | */ | |
194 | ||
486386f6 JP |
195 | #define ELF_CORE_COPY_REGS(pr_reg, regs) \ |
196 | do { \ | |
06495476 HS |
197 | unsigned v; \ |
198 | (pr_reg)[0] = (regs)->r15; \ | |
199 | (pr_reg)[1] = (regs)->r14; \ | |
200 | (pr_reg)[2] = (regs)->r13; \ | |
201 | (pr_reg)[3] = (regs)->r12; \ | |
202 | (pr_reg)[4] = (regs)->bp; \ | |
203 | (pr_reg)[5] = (regs)->bx; \ | |
204 | (pr_reg)[6] = (regs)->r11; \ | |
205 | (pr_reg)[7] = (regs)->r10; \ | |
206 | (pr_reg)[8] = (regs)->r9; \ | |
207 | (pr_reg)[9] = (regs)->r8; \ | |
208 | (pr_reg)[10] = (regs)->ax; \ | |
209 | (pr_reg)[11] = (regs)->cx; \ | |
210 | (pr_reg)[12] = (regs)->dx; \ | |
211 | (pr_reg)[13] = (regs)->si; \ | |
212 | (pr_reg)[14] = (regs)->di; \ | |
213 | (pr_reg)[15] = (regs)->orig_ax; \ | |
214 | (pr_reg)[16] = (regs)->ip; \ | |
215 | (pr_reg)[17] = (regs)->cs; \ | |
216 | (pr_reg)[18] = (regs)->flags; \ | |
217 | (pr_reg)[19] = (regs)->sp; \ | |
218 | (pr_reg)[20] = (regs)->ss; \ | |
219 | (pr_reg)[21] = current->thread.fs; \ | |
220 | (pr_reg)[22] = current->thread.gs; \ | |
221 | asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ | |
222 | asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ | |
223 | asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ | |
224 | asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ | |
225 | } while (0); | |
226 | ||
2439a791 TG |
227 | /* I'm not sure if we can use '-' here */ |
228 | #define ELF_PLATFORM ("x86_64") | |
229 | extern void set_personality_64bit(void); | |
a97f52e6 RM |
230 | extern unsigned int sysctl_vsyscall32; |
231 | extern int force_personality32; | |
2439a791 TG |
232 | |
233 | #endif /* !CONFIG_X86_32 */ | |
234 | ||
975511be | 235 | #define CORE_DUMP_USE_REGSET |
2439a791 TG |
236 | #define ELF_EXEC_PAGESIZE 4096 |
237 | ||
238 | /* This is the location that an ET_DYN program is loaded if exec'ed. Typical | |
239 | use of this is to invoke "./ld.so someprog" to test out a new version of | |
240 | the loader. We need to make sure that it is out of the way of the program | |
241 | that it will "exec", and that there is sufficient room for the brk. */ | |
242 | ||
243 | #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) | |
244 | ||
245 | /* This yields a mask that user programs can use to figure out what | |
246 | instruction set this CPU supports. This could be done in user space, | |
247 | but it's not easy, and we've already done it here. */ | |
248 | ||
249 | #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) | |
250 | ||
251 | /* This yields a string that ld.so will use to load implementation | |
252 | specific libraries for optimization. This is more specific in | |
253 | intent than poking at uname or /proc/cpuinfo. | |
254 | ||
255 | For the moment, we have only optimizations for the Intel generations, | |
256 | but that could change... */ | |
257 | ||
0b592682 | 258 | #define SET_PERSONALITY(ex) set_personality_64bit() |
2439a791 TG |
259 | |
260 | /* | |
261 | * An executable for which elf_read_implies_exec() returns TRUE will | |
262 | * have the READ_IMPLIES_EXEC personality flag set automatically. | |
263 | */ | |
264 | #define elf_read_implies_exec(ex, executable_stack) \ | |
265 | (executable_stack != EXSTACK_DISABLE_X) | |
266 | ||
267 | struct task_struct; | |
268 | ||
486386f6 JP |
269 | #define ARCH_DLINFO_IA32(vdso_enabled) \ |
270 | do { \ | |
271 | if (vdso_enabled) { \ | |
a97f52e6 RM |
272 | NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ |
273 | NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ | |
486386f6 | 274 | } \ |
a97f52e6 RM |
275 | } while (0) |
276 | ||
2439a791 | 277 | #ifdef CONFIG_X86_32 |
2439a791 | 278 | |
80938332 MH |
279 | #define STACK_RND_MASK (0x7ff) |
280 | ||
2439a791 | 281 | #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) |
2439a791 | 282 | |
a97f52e6 | 283 | #define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled) |
2439a791 | 284 | |
a97f52e6 | 285 | /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ |
2439a791 TG |
286 | |
287 | #else /* CONFIG_X86_32 */ | |
288 | ||
af65d648 RM |
289 | #define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */ |
290 | ||
2439a791 TG |
291 | /* 1GB for 64bit, 8MB for 32bit */ |
292 | #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) | |
293 | ||
486386f6 JP |
294 | #define ARCH_DLINFO \ |
295 | do { \ | |
296 | if (vdso_enabled) \ | |
297 | NEW_AUX_ENT(AT_SYSINFO_EHDR, \ | |
298 | (unsigned long)current->mm->context.vdso); \ | |
2439a791 TG |
299 | } while (0) |
300 | ||
a97f52e6 RM |
301 | #define AT_SYSINFO 32 |
302 | ||
303 | #define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32) | |
304 | ||
305 | #define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) | |
306 | ||
2439a791 TG |
307 | #endif /* !CONFIG_X86_32 */ |
308 | ||
af65d648 RM |
309 | #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) |
310 | ||
486386f6 JP |
311 | #define VDSO_ENTRY \ |
312 | ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall)) | |
af65d648 | 313 | |
2439a791 TG |
314 | struct linux_binprm; |
315 | ||
316 | #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 | |
317 | extern int arch_setup_additional_pages(struct linux_binprm *bprm, | |
fc5243d9 | 318 | int uses_interp); |
2439a791 | 319 | |
a97f52e6 RM |
320 | extern int syscall32_setup_pages(struct linux_binprm *, int exstack); |
321 | #define compat_arch_setup_additional_pages syscall32_setup_pages | |
322 | ||
c1d171a0 JK |
323 | extern unsigned long arch_randomize_brk(struct mm_struct *mm); |
324 | #define arch_randomize_brk arch_randomize_brk | |
325 | ||
1965aae3 | 326 | #endif /* _ASM_X86_ELF_H */ |