Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [diff] [blame] | 1 | #ifndef ASM_X86__ELF_H |
| 2 | #define ASM_X86__ELF_H |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 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 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 14 | #define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t)) |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 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 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 43 | #else |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 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 | |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 75 | #include <asm/vdso.h> |
| 76 | |
| 77 | extern unsigned int vdso_enabled; |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 78 | |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 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 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 85 | #include <asm/processor.h> |
Jeremy Fitzhardinge | 9f9d489 | 2008-06-25 00:19:32 -0400 | [diff] [blame] | 86 | #include <asm/system.h> |
Joe Perches | e40c0fe | 2008-03-09 12:35:00 -0700 | [diff] [blame] | 87 | |
| 88 | #ifdef CONFIG_X86_32 |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 89 | #include <asm/desc.h> |
| 90 | |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 91 | #define elf_check_arch(x) elf_check_arch_ia32(x) |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 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 | */ |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 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; \ |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 108 | } while (0) |
| 109 | |
Hiroshi Shimamoto | 0649547 | 2008-01-30 13:33:16 +0100 | [diff] [blame] | 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 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 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; \ |
Hiroshi Shimamoto | 0649547 | 2008-01-30 13:33:16 +0100 | [diff] [blame] | 134 | } while (0); |
| 135 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 136 | #define ELF_PLATFORM (utsname()->machine) |
| 137 | #define set_personality_64bit() do { } while (0) |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 138 | |
| 139 | #else /* CONFIG_X86_32 */ |
| 140 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 141 | /* |
| 142 | * This is used to ensure we don't load something for the wrong architecture. |
| 143 | */ |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 144 | #define elf_check_arch(x) \ |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 145 | ((x)->e_machine == EM_X86_64) |
| 146 | |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 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 | { |
Jeremy Fitzhardinge | b6edbb1 | 2008-08-19 13:04:19 -0700 | [diff] [blame] | 151 | loadsegment(fs, 0); |
| 152 | loadsegment(ds, __USER32_DS); |
| 153 | loadsegment(es, __USER32_DS); |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 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 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 174 | #define ELF_PLAT_INIT(_r, load_addr) \ |
| 175 | do { \ |
| 176 | elf_common_init(¤t->thread, _r, 0); \ |
| 177 | clear_thread_flag(TIF_IA32); \ |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 178 | } while (0) |
| 179 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 180 | #define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 181 | elf_common_init(¤t->thread, regs, __USER_DS) |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 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 | |
Martin Schwidefsky | 0b59268 | 2008-10-16 15:39:57 +0200 | [diff] [blame^] | 189 | #define COMPAT_SET_PERSONALITY(ex) \ |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 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 | |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 198 | #define COMPAT_ELF_PLATFORM ("i686") |
| 199 | |
Hiroshi Shimamoto | 0649547 | 2008-01-30 13:33:16 +0100 | [diff] [blame] | 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 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 206 | #define ELF_CORE_COPY_REGS(pr_reg, regs) \ |
| 207 | do { \ |
Hiroshi Shimamoto | 0649547 | 2008-01-30 13:33:16 +0100 | [diff] [blame] | 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 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 238 | /* I'm not sure if we can use '-' here */ |
| 239 | #define ELF_PLATFORM ("x86_64") |
| 240 | extern void set_personality_64bit(void); |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 241 | extern unsigned int sysctl_vsyscall32; |
| 242 | extern int force_personality32; |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 243 | |
| 244 | #endif /* !CONFIG_X86_32 */ |
| 245 | |
Roland McGrath | 975511b | 2008-01-30 13:31:54 +0100 | [diff] [blame] | 246 | #define CORE_DUMP_USE_REGSET |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 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 | |
Martin Schwidefsky | 0b59268 | 2008-10-16 15:39:57 +0200 | [diff] [blame^] | 270 | #define SET_PERSONALITY(ex) set_personality_64bit() |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 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 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 281 | #define ARCH_DLINFO_IA32(vdso_enabled) \ |
| 282 | do { \ |
| 283 | if (vdso_enabled) { \ |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 284 | NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ |
| 285 | NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 286 | } \ |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 287 | } while (0) |
| 288 | |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 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 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 297 | #else /* CONFIG_X86_32 */ |
| 298 | |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 299 | #define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */ |
| 300 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 301 | /* 1GB for 64bit, 8MB for 32bit */ |
| 302 | #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) |
| 303 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 304 | #define ARCH_DLINFO \ |
| 305 | do { \ |
| 306 | if (vdso_enabled) \ |
| 307 | NEW_AUX_ENT(AT_SYSINFO_EHDR, \ |
| 308 | (unsigned long)current->mm->context.vdso); \ |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 309 | } while (0) |
| 310 | |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 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 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 317 | #endif /* !CONFIG_X86_32 */ |
| 318 | |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 319 | #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) |
| 320 | |
Joe Perches | 486386f | 2008-03-23 01:02:08 -0700 | [diff] [blame] | 321 | #define VDSO_ENTRY \ |
| 322 | ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall)) |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 323 | |
Thomas Gleixner | 2439a79 | 2007-10-23 22:37:23 +0200 | [diff] [blame] | 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 | |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 330 | extern int syscall32_setup_pages(struct linux_binprm *, int exstack); |
| 331 | #define compat_arch_setup_additional_pages syscall32_setup_pages |
| 332 | |
Jiri Kosina | c1d171a | 2008-01-30 13:30:40 +0100 | [diff] [blame] | 333 | extern unsigned long arch_randomize_brk(struct mm_struct *mm); |
| 334 | #define arch_randomize_brk arch_randomize_brk |
| 335 | |
Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [diff] [blame] | 336 | #endif /* ASM_X86__ELF_H */ |