5 * ELF register definitions..
8 #include <asm/ptrace.h>
10 #include <asm/auxvec.h>
12 typedef unsigned long elf_greg_t;
14 #define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
15 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
17 typedef struct user_i387_struct elf_fpregset_t;
21 typedef struct user_fxsr_struct elf_fpxregset_t;
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
37 * These are used to set parameters in the core dumps.
39 #define ELF_CLASS ELFCLASS32
40 #define ELF_DATA ELFDATA2LSB
41 #define ELF_ARCH EM_386
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
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 */
64 #define R_X86_64_NUM 16
67 * These are used to set parameters in the core dumps.
69 #define ELF_CLASS ELFCLASS64
70 #define ELF_DATA ELFDATA2LSB
71 #define ELF_ARCH EM_X86_64
77 extern unsigned int vdso_enabled;
80 * This is used to ensure we don't load something for the wrong architecture.
82 #define elf_check_arch_ia32(x) \
83 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
85 #include <asm/processor.h>
86 #include <asm/system.h>
91 #define elf_check_arch(x) elf_check_arch_ia32(x)
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.
98 A value of 0 tells we have no such handler.
100 We might as well make sure everything else is cleared too (except for %esp),
101 just to make things more deterministic.
103 #define ELF_PLAT_INIT(_r, load_addr) \
105 _r->bx = 0; _r->cx = 0; _r->dx = 0; \
106 _r->si = 0; _r->di = 0; _r->bp = 0; \
111 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
112 * now struct_user_regs, they are different)
115 #define ELF_CORE_COPY_REGS(pr_reg, regs) \
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; \
136 #define ELF_PLATFORM (utsname()->machine)
137 #define set_personality_64bit() do { } while (0)
139 #else /* CONFIG_X86_32 */
142 * This is used to ensure we don't load something for the wrong architecture.
144 #define elf_check_arch(x) \
145 ((x)->e_machine == EM_X86_64)
147 #define compat_elf_check_arch(x) elf_check_arch_ia32(x)
149 static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
151 asm volatile("movl %0,%%fs" :: "r" (0));
152 asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
156 regs->flags = X86_EFLAGS_IF;
157 regs->cs = __USER32_CS;
158 regs->ss = __USER32_DS;
161 static inline void elf_common_init(struct thread_struct *t,
162 struct pt_regs *regs, const u16 ds)
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;
169 t->fsindex = t->gsindex = 0;
173 #define ELF_PLAT_INIT(_r, load_addr) \
175 elf_common_init(¤t->thread, _r, 0); \
176 clear_thread_flag(TIF_IA32); \
179 #define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
180 elf_common_init(¤t->thread, regs, __USER_DS)
182 #define compat_start_thread(regs, ip, sp) \
184 start_ia32_thread(regs, ip, sp); \
188 #define COMPAT_SET_PERSONALITY(ex, ibcs2) \
190 if (test_thread_flag(TIF_IA32)) \
191 clear_thread_flag(TIF_ABI_PENDING); \
193 set_thread_flag(TIF_ABI_PENDING); \
194 current->personality |= force_personality32; \
197 #define COMPAT_ELF_PLATFORM ("i686")
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
205 #define ELF_CORE_COPY_REGS(pr_reg, regs) \
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; \
237 /* I'm not sure if we can use '-' here */
238 #define ELF_PLATFORM ("x86_64")
239 extern void set_personality_64bit(void);
240 extern unsigned int sysctl_vsyscall32;
241 extern int force_personality32;
243 #endif /* !CONFIG_X86_32 */
245 #define CORE_DUMP_USE_REGSET
246 #define USE_ELF_CORE_DUMP
247 #define ELF_EXEC_PAGESIZE 4096
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. */
254 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
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. */
260 #define ELF_HWCAP (boot_cpu_data.x86_capability[0])
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.
266 For the moment, we have only optimizations for the Intel generations,
267 but that could change... */
269 #define SET_PERSONALITY(ex, ibcs2) set_personality_64bit()
272 * An executable for which elf_read_implies_exec() returns TRUE will
273 * have the READ_IMPLIES_EXEC personality flag set automatically.
275 #define elf_read_implies_exec(ex, executable_stack) \
276 (executable_stack != EXSTACK_DISABLE_X)
280 #define ARCH_DLINFO_IA32(vdso_enabled) \
282 if (vdso_enabled) { \
283 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
284 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
290 #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
292 #define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
294 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
296 #else /* CONFIG_X86_32 */
298 #define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
300 /* 1GB for 64bit, 8MB for 32bit */
301 #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
303 #define ARCH_DLINFO \
306 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
307 (unsigned long)current->mm->context.vdso); \
310 #define AT_SYSINFO 32
312 #define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
314 #define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
316 #endif /* !CONFIG_X86_32 */
318 #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
321 ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall))
325 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
326 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
327 int executable_stack);
329 extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
330 #define compat_arch_setup_additional_pages syscall32_setup_pages
332 extern unsigned long arch_randomize_brk(struct mm_struct *mm);
333 #define arch_randomize_brk arch_randomize_brk
335 #endif /* ASM_X86__ELF_H */