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 do { \ 174 elf_common_init(¤t->thread, _r, 0); \ 175 clear_thread_flag(TIF_IA32); \ 176 } while (0) 177 178 #define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ 179 elf_common_init(¤t->thread, regs, __USER_DS) 180 181 void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp); 182 #define compat_start_thread start_thread_ia32 183 184 void set_personality_ia32(void); 185 #define COMPAT_SET_PERSONALITY(ex) set_personality_ia32() 186 187 #define COMPAT_ELF_PLATFORM ("i686") 188 189 /* 190 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is 191 * now struct_user_regs, they are different). Assumes current is the process 192 * getting dumped. 193 */ 194 195 #define ELF_CORE_COPY_REGS(pr_reg, regs) \ 196 do { \ 197 unsigned v; \ 198 (pr_reg)[0] = (regs)->r15; \ 199 (pr_reg)[1] = (regs)->r14; \ 200 (pr_reg)[2] = (regs)->r13; \ 201 (pr_reg)[3] = (regs)->r12; \ 202 (pr_reg)[4] = (regs)->bp; \ 203 (pr_reg)[5] = (regs)->bx; \ 204 (pr_reg)[6] = (regs)->r11; \ 205 (pr_reg)[7] = (regs)->r10; \ 206 (pr_reg)[8] = (regs)->r9; \ 207 (pr_reg)[9] = (regs)->r8; \ 208 (pr_reg)[10] = (regs)->ax; \ 209 (pr_reg)[11] = (regs)->cx; \ 210 (pr_reg)[12] = (regs)->dx; \ 211 (pr_reg)[13] = (regs)->si; \ 212 (pr_reg)[14] = (regs)->di; \ 213 (pr_reg)[15] = (regs)->orig_ax; \ 214 (pr_reg)[16] = (regs)->ip; \ 215 (pr_reg)[17] = (regs)->cs; \ 216 (pr_reg)[18] = (regs)->flags; \ 217 (pr_reg)[19] = (regs)->sp; \ 218 (pr_reg)[20] = (regs)->ss; \ 219 (pr_reg)[21] = current->thread.fs; \ 220 (pr_reg)[22] = current->thread.gs; \ 221 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ 222 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ 223 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ 224 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ 225 } while (0); 226 227 /* I'm not sure if we can use '-' here */ 228 #define ELF_PLATFORM ("x86_64") 229 extern void set_personality_64bit(void); 230 extern unsigned int sysctl_vsyscall32; 231 extern int force_personality32; 232 233 #endif /* !CONFIG_X86_32 */ 234 235 #define CORE_DUMP_USE_REGSET 236 #define ELF_EXEC_PAGESIZE 4096 237 238 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 239 use of this is to invoke "./ld.so someprog" to test out a new version of 240 the loader. We need to make sure that it is out of the way of the program 241 that it will "exec", and that there is sufficient room for the brk. */ 242 243 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 244 245 /* This yields a mask that user programs can use to figure out what 246 instruction set this CPU supports. This could be done in user space, 247 but it's not easy, and we've already done it here. */ 248 249 #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) 250 251 /* This yields a string that ld.so will use to load implementation 252 specific libraries for optimization. This is more specific in 253 intent than poking at uname or /proc/cpuinfo. 254 255 For the moment, we have only optimizations for the Intel generations, 256 but that could change... */ 257 258 #define SET_PERSONALITY(ex) set_personality_64bit() 259 260 /* 261 * An executable for which elf_read_implies_exec() returns TRUE will 262 * have the READ_IMPLIES_EXEC personality flag set automatically. 263 */ 264 #define elf_read_implies_exec(ex, executable_stack) \ 265 (executable_stack != EXSTACK_DISABLE_X) 266 267 struct task_struct; 268 269 #define ARCH_DLINFO_IA32(vdso_enabled) \ 270 do { \ 271 if (vdso_enabled) { \ 272 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ 273 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ 274 } \ 275 } while (0) 276 277 #ifdef CONFIG_X86_32 278 279 #define STACK_RND_MASK (0x7ff) 280 281 #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) 282 283 #define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled) 284 285 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 286 287 #else /* CONFIG_X86_32 */ 288 289 #define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */ 290 291 /* 1GB for 64bit, 8MB for 32bit */ 292 #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) 293 294 #define ARCH_DLINFO \ 295 do { \ 296 if (vdso_enabled) \ 297 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 298 (unsigned long)current->mm->context.vdso); \ 299 } while (0) 300 301 #define AT_SYSINFO 32 302 303 #define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32) 304 305 #define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) 306 307 #endif /* !CONFIG_X86_32 */ 308 309 #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) 310 311 #define VDSO_ENTRY \ 312 ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall)) 313 314 struct linux_binprm; 315 316 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 317 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 318 int uses_interp); 319 320 extern int syscall32_setup_pages(struct linux_binprm *, int exstack); 321 #define compat_arch_setup_additional_pages syscall32_setup_pages 322 323 extern unsigned long arch_randomize_brk(struct mm_struct *mm); 324 #define arch_randomize_brk arch_randomize_brk 325 326 #endif /* _ASM_X86_ELF_H */ 327