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 12typedef unsigned long elf_greg_t; 13 14#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t)) 15typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 16 17typedef struct user_i387_struct elf_fpregset_t; 18 19#ifdef __i386__ 20 21typedef 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 77extern 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) \ 116do { \ 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) \ 136do { \ 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) \ 142do { \ 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 160static 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 elf_common_init(¤t->thread, _r, 0) 174 175#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \ 176 elf_common_init(¤t->thread, regs, __USER_DS) 177 178void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp); 179#define compat_start_thread start_thread_ia32 180 181void set_personality_ia32(void); 182#define COMPAT_SET_PERSONALITY(ex) set_personality_ia32() 183 184#define COMPAT_ELF_PLATFORM ("i686") 185 186/* 187 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is 188 * now struct_user_regs, they are different). Assumes current is the process 189 * getting dumped. 190 */ 191 192#define ELF_CORE_COPY_REGS(pr_reg, regs) \ 193do { \ 194 unsigned v; \ 195 (pr_reg)[0] = (regs)->r15; \ 196 (pr_reg)[1] = (regs)->r14; \ 197 (pr_reg)[2] = (regs)->r13; \ 198 (pr_reg)[3] = (regs)->r12; \ 199 (pr_reg)[4] = (regs)->bp; \ 200 (pr_reg)[5] = (regs)->bx; \ 201 (pr_reg)[6] = (regs)->r11; \ 202 (pr_reg)[7] = (regs)->r10; \ 203 (pr_reg)[8] = (regs)->r9; \ 204 (pr_reg)[9] = (regs)->r8; \ 205 (pr_reg)[10] = (regs)->ax; \ 206 (pr_reg)[11] = (regs)->cx; \ 207 (pr_reg)[12] = (regs)->dx; \ 208 (pr_reg)[13] = (regs)->si; \ 209 (pr_reg)[14] = (regs)->di; \ 210 (pr_reg)[15] = (regs)->orig_ax; \ 211 (pr_reg)[16] = (regs)->ip; \ 212 (pr_reg)[17] = (regs)->cs; \ 213 (pr_reg)[18] = (regs)->flags; \ 214 (pr_reg)[19] = (regs)->sp; \ 215 (pr_reg)[20] = (regs)->ss; \ 216 (pr_reg)[21] = current->thread.fs; \ 217 (pr_reg)[22] = current->thread.gs; \ 218 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ 219 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ 220 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ 221 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ 222} while (0); 223 224/* I'm not sure if we can use '-' here */ 225#define ELF_PLATFORM ("x86_64") 226extern void set_personality_64bit(void); 227extern unsigned int sysctl_vsyscall32; 228extern int force_personality32; 229 230#endif /* !CONFIG_X86_32 */ 231 232#define CORE_DUMP_USE_REGSET 233#define ELF_EXEC_PAGESIZE 4096 234 235/* This is the location that an ET_DYN program is loaded if exec'ed. Typical 236 use of this is to invoke "./ld.so someprog" to test out a new version of 237 the loader. We need to make sure that it is out of the way of the program 238 that it will "exec", and that there is sufficient room for the brk. */ 239 240#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 241 242/* This yields a mask that user programs can use to figure out what 243 instruction set this CPU supports. This could be done in user space, 244 but it's not easy, and we've already done it here. */ 245 246#define ELF_HWCAP (boot_cpu_data.x86_capability[0]) 247 248/* This yields a string that ld.so will use to load implementation 249 specific libraries for optimization. This is more specific in 250 intent than poking at uname or /proc/cpuinfo. 251 252 For the moment, we have only optimizations for the Intel generations, 253 but that could change... */ 254 255#define SET_PERSONALITY(ex) set_personality_64bit() 256 257/* 258 * An executable for which elf_read_implies_exec() returns TRUE will 259 * have the READ_IMPLIES_EXEC personality flag set automatically. 260 */ 261#define elf_read_implies_exec(ex, executable_stack) \ 262 (executable_stack != EXSTACK_DISABLE_X) 263 264struct task_struct; 265 266#define ARCH_DLINFO_IA32(vdso_enabled) \ 267do { \ 268 if (vdso_enabled) { \ 269 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ 270 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ 271 } \ 272} while (0) 273 274#ifdef CONFIG_X86_32 275 276#define STACK_RND_MASK (0x7ff) 277 278#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) 279 280#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled) 281 282/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 283 284#else /* CONFIG_X86_32 */ 285 286#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */ 287 288/* 1GB for 64bit, 8MB for 32bit */ 289#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) 290 291#define ARCH_DLINFO \ 292do { \ 293 if (vdso_enabled) \ 294 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 295 (unsigned long)current->mm->context.vdso); \ 296} while (0) 297 298#define AT_SYSINFO 32 299 300#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32) 301 302#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000) 303 304#endif /* !CONFIG_X86_32 */ 305 306#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) 307 308#define VDSO_ENTRY \ 309 ((unsigned long)VDSO32_SYMBOL(VDSO_CURRENT_BASE, vsyscall)) 310 311struct linux_binprm; 312 313#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 314extern int arch_setup_additional_pages(struct linux_binprm *bprm, 315 int uses_interp); 316 317extern int syscall32_setup_pages(struct linux_binprm *, int exstack); 318#define compat_arch_setup_additional_pages syscall32_setup_pages 319 320extern unsigned long arch_randomize_brk(struct mm_struct *mm); 321#define arch_randomize_brk arch_randomize_brk 322 323#endif /* _ASM_X86_ELF_H */ 324