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