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 start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp) 161 { 162 loadsegment(fs, 0); 163 loadsegment(ds, __USER32_DS); 164 loadsegment(es, __USER32_DS); 165 load_gs_index(0); 166 regs->ip = ip; 167 regs->sp = sp; 168 regs->flags = X86_EFLAGS_IF; 169 regs->cs = __USER32_CS; 170 regs->ss = __USER32_DS; 171 } 172 173 static inline void elf_common_init(struct thread_struct *t, 174 struct pt_regs *regs, const u16 ds) 175 { 176 regs->ax = regs->bx = regs->cx = regs->dx = 0; 177 regs->si = regs->di = regs->bp = 0; 178 regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0; 179 regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; 180 t->fs = t->gs = 0; 181 t->fsindex = t->gsindex = 0; 182 t->ds = t->es = ds; 183 } 184 185 #define ELF_PLAT_INIT(_r, load_addr) \ 186 do { \ 187 elf_common_init(¤t->thread, _r, 0); \ 188 clear_thread_flag(TIF_IA32); \ 189 } while (0) 190 191 #define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ 192 elf_common_init(¤t->thread, regs, __USER_DS) 193 194 #define compat_start_thread(regs, ip, sp) \ 195 do { \ 196 start_ia32_thread(regs, ip, sp); \ 197 set_fs(USER_DS); \ 198 } while (0) 199 200 #define COMPAT_SET_PERSONALITY(ex) \ 201 do { \ 202 if (test_thread_flag(TIF_IA32)) \ 203 clear_thread_flag(TIF_ABI_PENDING); \ 204 else \ 205 set_thread_flag(TIF_ABI_PENDING); \ 206 current->personality |= force_personality32; \ 207 } while (0) 208 209 #define COMPAT_ELF_PLATFORM ("i686") 210 211 /* 212 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is 213 * now struct_user_regs, they are different). Assumes current is the process 214 * getting dumped. 215 */ 216 217 #define ELF_CORE_COPY_REGS(pr_reg, regs) \ 218 do { \ 219 unsigned v; \ 220 (pr_reg)[0] = (regs)->r15; \ 221 (pr_reg)[1] = (regs)->r14; \ 222 (pr_reg)[2] = (regs)->r13; \ 223 (pr_reg)[3] = (regs)->r12; \ 224 (pr_reg)[4] = (regs)->bp; \ 225 (pr_reg)[5] = (regs)->bx; \ 226 (pr_reg)[6] = (regs)->r11; \ 227 (pr_reg)[7] = (regs)->r10; \ 228 (pr_reg)[8] = (regs)->r9; \ 229 (pr_reg)[9] = (regs)->r8; \ 230 (pr_reg)[10] = (regs)->ax; \ 231 (pr_reg)[11] = (regs)->cx; \ 232 (pr_reg)[12] = (regs)->dx; \ 233 (pr_reg)[13] = (regs)->si; \ 234 (pr_reg)[14] = (regs)->di; \ 235 (pr_reg)[15] = (regs)->orig_ax; \ 236 (pr_reg)[16] = (regs)->ip; \ 237 (pr_reg)[17] = (regs)->cs; \ 238 (pr_reg)[18] = (regs)->flags; \ 239 (pr_reg)[19] = (regs)->sp; \ 240 (pr_reg)[20] = (regs)->ss; \ 241 (pr_reg)[21] = current->thread.fs; \ 242 (pr_reg)[22] = current->thread.gs; \ 243 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ 244 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ 245 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ 246 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ 247 } while (0); 248 249 /* I'm not sure if we can use '-' here */ 250 #define ELF_PLATFORM ("x86_64") 251 extern void set_personality_64bit(void); 252 extern unsigned int sysctl_vsyscall32; 253 extern int force_personality32; 254 255 #endif /* !CONFIG_X86_32 */ 256 257 #define CORE_DUMP_USE_REGSET 258 #define USE_ELF_CORE_DUMP 259 #define ELF_EXEC_PAGESIZE 4096 260 261 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 262 use of this is to invoke "./ld.so someprog" to test out a new version of 263 the loader. We need to make sure that it is out of the way of the program 264 that it will "exec", and that there is sufficient room for the brk. */ 265 266 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 267 268 /* This yields a mask that user programs can use to figure out what 269 instruction set this CPU supports. This could be done in user space, 270 but it's not easy, and we've already done it here. */ 271 272 #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) 273 274 /* This yields a string that ld.so will use to load implementation 275 specific libraries for optimization. This is more specific in 276 intent than poking at uname or /proc/cpuinfo. 277 278 For the moment, we have only optimizations for the Intel generations, 279 but that could change... */ 280 281 #define SET_PERSONALITY(ex) set_personality_64bit() 282 283 /* 284 * An executable for which elf_read_implies_exec() returns TRUE will 285 * have the READ_IMPLIES_EXEC personality flag set automatically. 286 */ 287 #define elf_read_implies_exec(ex, executable_stack) \ 288 (executable_stack != EXSTACK_DISABLE_X) 289 290 struct task_struct; 291 292 #define ARCH_DLINFO_IA32(vdso_enabled) \ 293 do { \ 294 if (vdso_enabled) { \ 295 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ 296 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ 297 } \ 298 } while (0) 299 300 #ifdef CONFIG_X86_32 301 302 #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) 303 304 #define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled) 305 306 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 307 308 #else /* CONFIG_X86_32 */ 309 310 #define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */ 311 312 /* 1GB for 64bit, 8MB for 32bit */ 313 #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) 314 315 #define ARCH_DLINFO \ 316 do { \ 317 if (vdso_enabled) \ 318 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 319 (unsigned long)current->mm->context.vdso); \ 320 } while (0) 321 322 #define AT_SYSINFO 32 323 324 #define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32) 325 326 #define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) 327 328 #endif /* !CONFIG_X86_32 */ 329 330 #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) 331 332 #define VDSO_ENTRY \ 333 ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall)) 334 335 struct linux_binprm; 336 337 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 338 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 339 int uses_interp); 340 341 extern int syscall32_setup_pages(struct linux_binprm *, int exstack); 342 #define compat_arch_setup_additional_pages syscall32_setup_pages 343 344 extern unsigned long arch_randomize_brk(struct mm_struct *mm); 345 #define arch_randomize_brk arch_randomize_brk 346 347 #endif /* _ASM_X86_ELF_H */ 348