1#ifndef _ASM_X86_ELF_H
2#define _ASM_X86_ELF_H
3
4
5
6
7#include <linux/thread_info.h>
8
9#include <asm/ptrace.h>
10#include <asm/user.h>
11#include <asm/auxvec.h>
12
13typedef unsigned long elf_greg_t;
14
15#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
16typedef elf_greg_t elf_gregset_t[ELF_NGREG];
17
18typedef struct user_i387_struct elf_fpregset_t;
19
20#ifdef __i386__
21
22typedef struct user_fxsr_struct elf_fpxregset_t;
23
24#define R_386_NONE 0
25#define R_386_32 1
26#define R_386_PC32 2
27#define R_386_GOT32 3
28#define R_386_PLT32 4
29#define R_386_COPY 5
30#define R_386_GLOB_DAT 6
31#define R_386_JMP_SLOT 7
32#define R_386_RELATIVE 8
33#define R_386_GOTOFF 9
34#define R_386_GOTPC 10
35#define R_386_NUM 11
36
37
38
39
40#define ELF_CLASS ELFCLASS32
41#define ELF_DATA ELFDATA2LSB
42#define ELF_ARCH EM_386
43
44#else
45
46
47#define R_X86_64_NONE 0
48#define R_X86_64_64 1
49#define R_X86_64_PC32 2
50#define R_X86_64_GOT32 3
51#define R_X86_64_PLT32 4
52#define R_X86_64_COPY 5
53#define R_X86_64_GLOB_DAT 6
54#define R_X86_64_JUMP_SLOT 7
55#define R_X86_64_RELATIVE 8
56#define R_X86_64_GOTPCREL 9
57
58#define R_X86_64_32 10
59#define R_X86_64_32S 11
60#define R_X86_64_16 12
61#define R_X86_64_PC16 13
62#define R_X86_64_8 14
63#define R_X86_64_PC8 15
64
65#define R_X86_64_NUM 16
66
67
68
69
70#define ELF_CLASS ELFCLASS64
71#define ELF_DATA ELFDATA2LSB
72#define ELF_ARCH EM_X86_64
73
74#endif
75
76#include <asm/vdso.h>
77
78#ifdef CONFIG_X86_64
79extern unsigned int vdso64_enabled;
80#endif
81#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
82extern unsigned int vdso32_enabled;
83#endif
84
85
86
87
88#define elf_check_arch_ia32(x) \
89 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
90
91#include <asm/processor.h>
92
93#ifdef CONFIG_X86_32
94#include <asm/desc.h>
95
96#define elf_check_arch(x) elf_check_arch_ia32(x)
97
98
99
100
101
102
103
104
105
106
107
108#define ELF_PLAT_INIT(_r, load_addr) \
109 do { \
110 _r->bx = 0; _r->cx = 0; _r->dx = 0; \
111 _r->si = 0; _r->di = 0; _r->bp = 0; \
112 _r->ax = 0; \
113} while (0)
114
115
116
117
118
119
120#define ELF_CORE_COPY_REGS_COMMON(pr_reg, regs) \
121do { \
122 pr_reg[0] = regs->bx; \
123 pr_reg[1] = regs->cx; \
124 pr_reg[2] = regs->dx; \
125 pr_reg[3] = regs->si; \
126 pr_reg[4] = regs->di; \
127 pr_reg[5] = regs->bp; \
128 pr_reg[6] = regs->ax; \
129 pr_reg[7] = regs->ds & 0xffff; \
130 pr_reg[8] = regs->es & 0xffff; \
131 pr_reg[9] = regs->fs & 0xffff; \
132 pr_reg[11] = regs->orig_ax; \
133 pr_reg[12] = regs->ip; \
134 pr_reg[13] = regs->cs & 0xffff; \
135 pr_reg[14] = regs->flags; \
136 pr_reg[15] = regs->sp; \
137 pr_reg[16] = regs->ss & 0xffff; \
138} while (0);
139
140#define ELF_CORE_COPY_REGS(pr_reg, regs) \
141do { \
142 ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
143 pr_reg[10] = get_user_gs(regs); \
144} while (0);
145
146#define ELF_CORE_COPY_KERNEL_REGS(pr_reg, regs) \
147do { \
148 ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
149 savesegment(gs, pr_reg[10]); \
150} while (0);
151
152#define ELF_PLATFORM (utsname()->machine)
153#define set_personality_64bit() do { } while (0)
154
155#else
156
157
158
159
160#define elf_check_arch(x) \
161 ((x)->e_machine == EM_X86_64)
162
163#define compat_elf_check_arch(x) \
164 (elf_check_arch_ia32(x) || \
165 (IS_ENABLED(CONFIG_X86_X32_ABI) && (x)->e_machine == EM_X86_64))
166
167#if __USER32_DS != __USER_DS
168# error "The following code assumes __USER32_DS == __USER_DS"
169#endif
170
171static inline void elf_common_init(struct thread_struct *t,
172 struct pt_regs *regs, const u16 ds)
173{
174
175 regs->bx = regs->cx = regs->dx = 0;
176 regs->si = regs->di = regs->bp = 0;
177 regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
178 regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
179 t->fsbase = t->gsbase = 0;
180 t->fsindex = t->gsindex = 0;
181 t->ds = t->es = ds;
182}
183
184#define ELF_PLAT_INIT(_r, load_addr) \
185 elf_common_init(¤t->thread, _r, 0)
186
187#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
188 elf_common_init(¤t->thread, regs, __USER_DS)
189
190void compat_start_thread(struct pt_regs *regs, u32 new_ip, u32 new_sp);
191#define compat_start_thread compat_start_thread
192
193void set_personality_ia32(bool);
194#define COMPAT_SET_PERSONALITY(ex) \
195 set_personality_ia32((ex).e_machine == EM_X86_64)
196
197#define COMPAT_ELF_PLATFORM ("i686")
198
199
200
201
202
203
204
205#define ELF_CORE_COPY_REGS(pr_reg, regs) \
206do { \
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.fsbase; \
230 (pr_reg)[22] = current->thread.gsbase; \
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
237
238#define ELF_PLATFORM ("x86_64")
239extern void set_personality_64bit(void);
240extern unsigned int sysctl_vsyscall32;
241extern int force_personality32;
242
243#endif
244
245#define CORE_DUMP_USE_REGSET
246#define ELF_EXEC_PAGESIZE 4096
247
248
249
250
251
252
253#define ELF_ET_DYN_BASE (mmap_is_ia32() ? 0x000400000UL : \
254 (TASK_SIZE / 3 * 2))
255
256
257
258
259
260#define ELF_HWCAP (boot_cpu_data.x86_capability[CPUID_1_EDX])
261
262extern u32 elf_hwcap2;
263
264
265
266
267
268
269#define ELF_HWCAP2 (elf_hwcap2)
270
271
272
273
274
275
276
277
278#define SET_PERSONALITY(ex) set_personality_64bit()
279
280
281
282
283
284#define elf_read_implies_exec(ex, executable_stack) \
285 (executable_stack != EXSTACK_DISABLE_X)
286
287struct task_struct;
288
289#define ARCH_DLINFO_IA32 \
290do { \
291 if (VDSO_CURRENT_BASE) { \
292 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
293 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
294 } \
295} while (0)
296
297
298
299
300static inline int mmap_is_ia32(void)
301{
302 return IS_ENABLED(CONFIG_X86_32) ||
303 (IS_ENABLED(CONFIG_COMPAT) &&
304 test_thread_flag(TIF_ADDR32));
305}
306
307extern unsigned long tasksize_32bit(void);
308extern unsigned long tasksize_64bit(void);
309extern unsigned long get_mmap_base(int is_legacy);
310
311#ifdef CONFIG_X86_32
312
313#define __STACK_RND_MASK(is32bit) (0x7ff)
314#define STACK_RND_MASK (0x7ff)
315
316#define ARCH_DLINFO ARCH_DLINFO_IA32
317
318
319
320#else
321
322
323#define __STACK_RND_MASK(is32bit) ((is32bit) ? 0x7ff : 0x3fffff)
324#define STACK_RND_MASK __STACK_RND_MASK(mmap_is_ia32())
325
326#define ARCH_DLINFO \
327do { \
328 if (vdso64_enabled) \
329 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
330 (unsigned long __force)current->mm->context.vdso); \
331} while (0)
332
333
334#define ARCH_DLINFO_X32 \
335do { \
336 if (vdso64_enabled) \
337 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
338 (unsigned long __force)current->mm->context.vdso); \
339} while (0)
340
341#define AT_SYSINFO 32
342
343#define COMPAT_ARCH_DLINFO \
344if (test_thread_flag(TIF_X32)) \
345 ARCH_DLINFO_X32; \
346else \
347 ARCH_DLINFO_IA32
348
349#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
350
351#endif
352
353#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
354
355#define VDSO_ENTRY \
356 ((unsigned long)current->mm->context.vdso + \
357 vdso_image_32.sym___kernel_vsyscall)
358
359struct linux_binprm;
360
361#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
362extern int arch_setup_additional_pages(struct linux_binprm *bprm,
363 int uses_interp);
364extern int compat_arch_setup_additional_pages(struct linux_binprm *bprm,
365 int uses_interp);
366#define compat_arch_setup_additional_pages compat_arch_setup_additional_pages
367
368
369enum align_flags {
370 ALIGN_VA_32 = BIT(0),
371 ALIGN_VA_64 = BIT(1),
372};
373
374struct va_alignment {
375 int flags;
376 unsigned long mask;
377 unsigned long bits;
378} ____cacheline_aligned;
379
380extern struct va_alignment va_align;
381extern unsigned long align_vdso_addr(unsigned long);
382#endif
383