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(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 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; \ 134 } while (0); 135 136 #define ELF_PLATFORM (utsname()->machine) 137 #define set_personality_64bit() do { } while (0) 138 139 #else /* CONFIG_X86_32 */ 140 141 /* 142 * This is used to ensure we don't load something for the wrong architecture. 143 */ 144 #define elf_check_arch(x) \ 145 ((x)->e_machine == EM_X86_64) 146 147 #define compat_elf_check_arch(x) elf_check_arch_ia32(x) 148 149 static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp) 150 { 151 loadsegment(fs, 0); 152 loadsegment(ds, __USER32_DS); 153 loadsegment(es, __USER32_DS); 154 load_gs_index(0); 155 regs->ip = ip; 156 regs->sp = sp; 157 regs->flags = X86_EFLAGS_IF; 158 regs->cs = __USER32_CS; 159 regs->ss = __USER32_DS; 160 } 161 162 static inline void elf_common_init(struct thread_struct *t, 163 struct pt_regs *regs, const u16 ds) 164 { 165 regs->ax = regs->bx = regs->cx = regs->dx = 0; 166 regs->si = regs->di = regs->bp = 0; 167 regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0; 168 regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; 169 t->fs = t->gs = 0; 170 t->fsindex = t->gsindex = 0; 171 t->ds = t->es = ds; 172 } 173 174 #define ELF_PLAT_INIT(_r, load_addr) \ 175 do { \ 176 elf_common_init(¤t->thread, _r, 0); \ 177 clear_thread_flag(TIF_IA32); \ 178 } while (0) 179 180 #define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ 181 elf_common_init(¤t->thread, regs, __USER_DS) 182 183 #define compat_start_thread(regs, ip, sp) \ 184 do { \ 185 start_ia32_thread(regs, ip, sp); \ 186 set_fs(USER_DS); \ 187 } while (0) 188 189 #define COMPAT_SET_PERSONALITY(ex) \ 190 do { \ 191 if (test_thread_flag(TIF_IA32)) \ 192 clear_thread_flag(TIF_ABI_PENDING); \ 193 else \ 194 set_thread_flag(TIF_ABI_PENDING); \ 195 current->personality |= force_personality32; \ 196 } while (0) 197 198 #define COMPAT_ELF_PLATFORM ("i686") 199 200 /* 201 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is 202 * now struct_user_regs, they are different). Assumes current is the process 203 * getting dumped. 204 */ 205 206 #define ELF_CORE_COPY_REGS(pr_reg, regs) \ 207 do { \ 208 unsigned v; \ 209 (pr_reg)[0] = (regs)->r15; \ 210 (pr_reg)[1] = (regs)->r14; \ 211 (pr_reg)[2] = (regs)->r13; \ 212 (pr_reg)[3] = (regs)->r12; \ 213 (pr_reg)[4] = (regs)->bp; \ 214 (pr_reg)[5] = (regs)->bx; \ 215 (pr_reg)[6] = (regs)->r11; \ 216 (pr_reg)[7] = (regs)->r10; \ 217 (pr_reg)[8] = (regs)->r9; \ 218 (pr_reg)[9] = (regs)->r8; \ 219 (pr_reg)[10] = (regs)->ax; \ 220 (pr_reg)[11] = (regs)->cx; \ 221 (pr_reg)[12] = (regs)->dx; \ 222 (pr_reg)[13] = (regs)->si; \ 223 (pr_reg)[14] = (regs)->di; \ 224 (pr_reg)[15] = (regs)->orig_ax; \ 225 (pr_reg)[16] = (regs)->ip; \ 226 (pr_reg)[17] = (regs)->cs; \ 227 (pr_reg)[18] = (regs)->flags; \ 228 (pr_reg)[19] = (regs)->sp; \ 229 (pr_reg)[20] = (regs)->ss; \ 230 (pr_reg)[21] = current->thread.fs; \ 231 (pr_reg)[22] = current->thread.gs; \ 232 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ 233 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ 234 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ 235 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ 236 } while (0); 237 238 /* I'm not sure if we can use '-' here */ 239 #define ELF_PLATFORM ("x86_64") 240 extern void set_personality_64bit(void); 241 extern unsigned int sysctl_vsyscall32; 242 extern int force_personality32; 243 244 #endif /* !CONFIG_X86_32 */ 245 246 #define CORE_DUMP_USE_REGSET 247 #define USE_ELF_CORE_DUMP 248 #define ELF_EXEC_PAGESIZE 4096 249 250 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 251 use of this is to invoke "./ld.so someprog" to test out a new version of 252 the loader. We need to make sure that it is out of the way of the program 253 that it will "exec", and that there is sufficient room for the brk. */ 254 255 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 256 257 /* This yields a mask that user programs can use to figure out what 258 instruction set this CPU supports. This could be done in user space, 259 but it's not easy, and we've already done it here. */ 260 261 #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) 262 263 /* This yields a string that ld.so will use to load implementation 264 specific libraries for optimization. This is more specific in 265 intent than poking at uname or /proc/cpuinfo. 266 267 For the moment, we have only optimizations for the Intel generations, 268 but that could change... */ 269 270 #define SET_PERSONALITY(ex) set_personality_64bit() 271 272 /* 273 * An executable for which elf_read_implies_exec() returns TRUE will 274 * have the READ_IMPLIES_EXEC personality flag set automatically. 275 */ 276 #define elf_read_implies_exec(ex, executable_stack) \ 277 (executable_stack != EXSTACK_DISABLE_X) 278 279 struct task_struct; 280 281 #define ARCH_DLINFO_IA32(vdso_enabled) \ 282 do { \ 283 if (vdso_enabled) { \ 284 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ 285 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ 286 } \ 287 } while (0) 288 289 #ifdef CONFIG_X86_32 290 291 #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) 292 293 #define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled) 294 295 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 296 297 #else /* CONFIG_X86_32 */ 298 299 #define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */ 300 301 /* 1GB for 64bit, 8MB for 32bit */ 302 #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) 303 304 #define ARCH_DLINFO \ 305 do { \ 306 if (vdso_enabled) \ 307 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 308 (unsigned long)current->mm->context.vdso); \ 309 } while (0) 310 311 #define AT_SYSINFO 32 312 313 #define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32) 314 315 #define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) 316 317 #endif /* !CONFIG_X86_32 */ 318 319 #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) 320 321 #define VDSO_ENTRY \ 322 ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall)) 323 324 struct linux_binprm; 325 326 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 327 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 328 int executable_stack); 329 330 extern int syscall32_setup_pages(struct linux_binprm *, int exstack); 331 #define compat_arch_setup_additional_pages syscall32_setup_pages 332 333 extern unsigned long arch_randomize_brk(struct mm_struct *mm); 334 #define arch_randomize_brk arch_randomize_brk 335 336 #endif /* _ASM_X86_ELF_H */ 337