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2439a791 TG |
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 | ||
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 | ||
486386f6 JP |
115 | #define ELF_CORE_COPY_REGS(pr_reg, regs) \ |
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; \ | |
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; \ | |
06495476 HS |
134 | } while (0); |
135 | ||
2439a791 TG |
136 | #define ELF_PLATFORM (utsname()->machine) |
137 | #define set_personality_64bit() do { } while (0) | |
2439a791 TG |
138 | |
139 | #else /* CONFIG_X86_32 */ | |
140 | ||
2439a791 TG |
141 | /* |
142 | * This is used to ensure we don't load something for the wrong architecture. | |
143 | */ | |
486386f6 | 144 | #define elf_check_arch(x) \ |
2439a791 TG |
145 | ((x)->e_machine == EM_X86_64) |
146 | ||
a97f52e6 RM |
147 | #define compat_elf_check_arch(x) elf_check_arch_ia32(x) |
148 | ||
149 | static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp) | |
150 | { | |
151 | asm volatile("movl %0,%%fs" :: "r" (0)); | |
152 | asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS)); | |
153 | load_gs_index(0); | |
154 | regs->ip = ip; | |
155 | regs->sp = sp; | |
156 | regs->flags = X86_EFLAGS_IF; | |
157 | regs->cs = __USER32_CS; | |
158 | regs->ss = __USER32_DS; | |
159 | } | |
160 | ||
161 | static inline void elf_common_init(struct thread_struct *t, | |
162 | struct pt_regs *regs, const u16 ds) | |
163 | { | |
164 | regs->ax = regs->bx = regs->cx = regs->dx = 0; | |
165 | regs->si = regs->di = regs->bp = 0; | |
166 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0; | |
167 | regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; | |
168 | t->fs = t->gs = 0; | |
169 | t->fsindex = t->gsindex = 0; | |
170 | t->ds = t->es = ds; | |
171 | } | |
172 | ||
486386f6 JP |
173 | #define ELF_PLAT_INIT(_r, load_addr) \ |
174 | do { \ | |
175 | elf_common_init(¤t->thread, _r, 0); \ | |
176 | clear_thread_flag(TIF_IA32); \ | |
2439a791 TG |
177 | } while (0) |
178 | ||
486386f6 | 179 | #define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ |
a97f52e6 | 180 | elf_common_init(¤t->thread, regs, __USER_DS) |
486386f6 JP |
181 | |
182 | #define compat_start_thread(regs, ip, sp) \ | |
183 | do { \ | |
184 | start_ia32_thread(regs, ip, sp); \ | |
185 | set_fs(USER_DS); \ | |
186 | } while (0) | |
187 | ||
188 | #define COMPAT_SET_PERSONALITY(ex, ibcs2) \ | |
189 | do { \ | |
190 | if (test_thread_flag(TIF_IA32)) \ | |
191 | clear_thread_flag(TIF_ABI_PENDING); \ | |
192 | else \ | |
193 | set_thread_flag(TIF_ABI_PENDING); \ | |
194 | current->personality |= force_personality32; \ | |
195 | } while (0) | |
196 | ||
a97f52e6 RM |
197 | #define COMPAT_ELF_PLATFORM ("i686") |
198 | ||
06495476 HS |
199 | /* |
200 | * regs is struct pt_regs, pr_reg is elf_gregset_t (which is | |
201 | * now struct_user_regs, they are different). Assumes current is the process | |
202 | * getting dumped. | |
203 | */ | |
204 | ||
486386f6 JP |
205 | #define ELF_CORE_COPY_REGS(pr_reg, regs) \ |
206 | do { \ | |
06495476 HS |
207 | unsigned v; \ |
208 | (pr_reg)[0] = (regs)->r15; \ | |
209 | (pr_reg)[1] = (regs)->r14; \ | |
210 | (pr_reg)[2] = (regs)->r13; \ | |
211 | (pr_reg)[3] = (regs)->r12; \ | |
212 | (pr_reg)[4] = (regs)->bp; \ | |
213 | (pr_reg)[5] = (regs)->bx; \ | |
214 | (pr_reg)[6] = (regs)->r11; \ | |
215 | (pr_reg)[7] = (regs)->r10; \ | |
216 | (pr_reg)[8] = (regs)->r9; \ | |
217 | (pr_reg)[9] = (regs)->r8; \ | |
218 | (pr_reg)[10] = (regs)->ax; \ | |
219 | (pr_reg)[11] = (regs)->cx; \ | |
220 | (pr_reg)[12] = (regs)->dx; \ | |
221 | (pr_reg)[13] = (regs)->si; \ | |
222 | (pr_reg)[14] = (regs)->di; \ | |
223 | (pr_reg)[15] = (regs)->orig_ax; \ | |
224 | (pr_reg)[16] = (regs)->ip; \ | |
225 | (pr_reg)[17] = (regs)->cs; \ | |
226 | (pr_reg)[18] = (regs)->flags; \ | |
227 | (pr_reg)[19] = (regs)->sp; \ | |
228 | (pr_reg)[20] = (regs)->ss; \ | |
229 | (pr_reg)[21] = current->thread.fs; \ | |
230 | (pr_reg)[22] = current->thread.gs; \ | |
231 | asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ | |
232 | asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ | |
233 | asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ | |
234 | asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ | |
235 | } while (0); | |
236 | ||
2439a791 TG |
237 | /* I'm not sure if we can use '-' here */ |
238 | #define ELF_PLATFORM ("x86_64") | |
239 | extern void set_personality_64bit(void); | |
a97f52e6 RM |
240 | extern unsigned int sysctl_vsyscall32; |
241 | extern int force_personality32; | |
2439a791 TG |
242 | |
243 | #endif /* !CONFIG_X86_32 */ | |
244 | ||
975511be | 245 | #define CORE_DUMP_USE_REGSET |
2439a791 TG |
246 | #define USE_ELF_CORE_DUMP |
247 | #define ELF_EXEC_PAGESIZE 4096 | |
248 | ||
249 | /* This is the location that an ET_DYN program is loaded if exec'ed. Typical | |
250 | use of this is to invoke "./ld.so someprog" to test out a new version of | |
251 | the loader. We need to make sure that it is out of the way of the program | |
252 | that it will "exec", and that there is sufficient room for the brk. */ | |
253 | ||
254 | #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) | |
255 | ||
256 | /* This yields a mask that user programs can use to figure out what | |
257 | instruction set this CPU supports. This could be done in user space, | |
258 | but it's not easy, and we've already done it here. */ | |
259 | ||
260 | #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) | |
261 | ||
262 | /* This yields a string that ld.so will use to load implementation | |
263 | specific libraries for optimization. This is more specific in | |
264 | intent than poking at uname or /proc/cpuinfo. | |
265 | ||
266 | For the moment, we have only optimizations for the Intel generations, | |
267 | but that could change... */ | |
268 | ||
269 | #define SET_PERSONALITY(ex, ibcs2) set_personality_64bit() | |
270 | ||
271 | /* | |
272 | * An executable for which elf_read_implies_exec() returns TRUE will | |
273 | * have the READ_IMPLIES_EXEC personality flag set automatically. | |
274 | */ | |
275 | #define elf_read_implies_exec(ex, executable_stack) \ | |
276 | (executable_stack != EXSTACK_DISABLE_X) | |
277 | ||
278 | struct task_struct; | |
279 | ||
486386f6 JP |
280 | #define ARCH_DLINFO_IA32(vdso_enabled) \ |
281 | do { \ | |
282 | if (vdso_enabled) { \ | |
a97f52e6 RM |
283 | NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ |
284 | NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ | |
486386f6 | 285 | } \ |
a97f52e6 RM |
286 | } while (0) |
287 | ||
2439a791 | 288 | #ifdef CONFIG_X86_32 |
2439a791 TG |
289 | |
290 | #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) | |
2439a791 | 291 | |
a97f52e6 | 292 | #define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled) |
2439a791 | 293 | |
a97f52e6 | 294 | /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ |
2439a791 TG |
295 | |
296 | #else /* CONFIG_X86_32 */ | |
297 | ||
af65d648 RM |
298 | #define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */ |
299 | ||
2439a791 TG |
300 | /* 1GB for 64bit, 8MB for 32bit */ |
301 | #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) | |
302 | ||
486386f6 JP |
303 | #define ARCH_DLINFO \ |
304 | do { \ | |
305 | if (vdso_enabled) \ | |
306 | NEW_AUX_ENT(AT_SYSINFO_EHDR, \ | |
307 | (unsigned long)current->mm->context.vdso); \ | |
2439a791 TG |
308 | } while (0) |
309 | ||
a97f52e6 RM |
310 | #define AT_SYSINFO 32 |
311 | ||
312 | #define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32) | |
313 | ||
314 | #define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) | |
315 | ||
2439a791 TG |
316 | #endif /* !CONFIG_X86_32 */ |
317 | ||
af65d648 RM |
318 | #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) |
319 | ||
486386f6 JP |
320 | #define VDSO_ENTRY \ |
321 | ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall)) | |
af65d648 | 322 | |
2439a791 TG |
323 | struct linux_binprm; |
324 | ||
325 | #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 | |
326 | extern int arch_setup_additional_pages(struct linux_binprm *bprm, | |
327 | int executable_stack); | |
328 | ||
a97f52e6 RM |
329 | extern int syscall32_setup_pages(struct linux_binprm *, int exstack); |
330 | #define compat_arch_setup_additional_pages syscall32_setup_pages | |
331 | ||
c1d171a0 JK |
332 | extern unsigned long arch_randomize_brk(struct mm_struct *mm); |
333 | #define arch_randomize_brk arch_randomize_brk | |
334 | ||
96a388de | 335 | #endif |