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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 :
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 :
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 1 :
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 */
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