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 #ifdef __KERNEL__ 76 77 #ifdef CONFIG_X86_32 78 #include <asm/processor.h> 79 #include <asm/system.h> /* for savesegment */ 80 #include <asm/desc.h> 81 82 /* 83 * This is used to ensure we don't load something for the wrong architecture. 84 */ 85 #define elf_check_arch(x) \ 86 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486)) 87 88 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx 89 contains a pointer to a function which might be registered using `atexit'. 90 This provides a mean for the dynamic linker to call DT_FINI functions for 91 shared libraries that have been loaded before the code runs. 92 93 A value of 0 tells we have no such handler. 94 95 We might as well make sure everything else is cleared too (except for %esp), 96 just to make things more deterministic. 97 */ 98 #define ELF_PLAT_INIT(_r, load_addr) do { \ 99 _r->ebx = 0; _r->ecx = 0; _r->edx = 0; \ 100 _r->esi = 0; _r->edi = 0; _r->ebp = 0; \ 101 _r->eax = 0; \ 102 } while (0) 103 104 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is 105 now struct_user_regs, they are different) */ 106 107 #define ELF_CORE_COPY_REGS(pr_reg, regs) \ 108 pr_reg[0] = regs->ebx; \ 109 pr_reg[1] = regs->ecx; \ 110 pr_reg[2] = regs->edx; \ 111 pr_reg[3] = regs->esi; \ 112 pr_reg[4] = regs->edi; \ 113 pr_reg[5] = regs->ebp; \ 114 pr_reg[6] = regs->eax; \ 115 pr_reg[7] = regs->xds & 0xffff; \ 116 pr_reg[8] = regs->xes & 0xffff; \ 117 pr_reg[9] = regs->xfs & 0xffff; \ 118 savesegment(gs,pr_reg[10]); \ 119 pr_reg[11] = regs->orig_eax; \ 120 pr_reg[12] = regs->eip; \ 121 pr_reg[13] = regs->xcs & 0xffff; \ 122 pr_reg[14] = regs->eflags; \ 123 pr_reg[15] = regs->esp; \ 124 pr_reg[16] = regs->xss & 0xffff; 125 126 #define ELF_PLATFORM (utsname()->machine) 127 #define set_personality_64bit() do { } while (0) 128 extern unsigned int vdso_enabled; 129 130 #else /* CONFIG_X86_32 */ 131 132 #include <asm/processor.h> 133 134 /* 135 * This is used to ensure we don't load something for the wrong architecture. 136 */ 137 #define elf_check_arch(x) \ 138 ((x)->e_machine == EM_X86_64) 139 140 #define ELF_PLAT_INIT(_r, load_addr) do { \ 141 struct task_struct *cur = current; \ 142 (_r)->rbx = 0; (_r)->rcx = 0; (_r)->rdx = 0; \ 143 (_r)->rsi = 0; (_r)->rdi = 0; (_r)->rbp = 0; \ 144 (_r)->rax = 0; \ 145 (_r)->r8 = 0; \ 146 (_r)->r9 = 0; \ 147 (_r)->r10 = 0; \ 148 (_r)->r11 = 0; \ 149 (_r)->r12 = 0; \ 150 (_r)->r13 = 0; \ 151 (_r)->r14 = 0; \ 152 (_r)->r15 = 0; \ 153 cur->thread.fs = 0; cur->thread.gs = 0; \ 154 cur->thread.fsindex = 0; cur->thread.gsindex = 0; \ 155 cur->thread.ds = 0; cur->thread.es = 0; \ 156 clear_thread_flag(TIF_IA32); \ 157 } while (0) 158 159 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is 160 now struct_user_regs, they are different). Assumes current is the process 161 getting dumped. */ 162 163 #define ELF_CORE_COPY_REGS(pr_reg, regs) do { \ 164 unsigned v; \ 165 (pr_reg)[0] = (regs)->r15; \ 166 (pr_reg)[1] = (regs)->r14; \ 167 (pr_reg)[2] = (regs)->r13; \ 168 (pr_reg)[3] = (regs)->r12; \ 169 (pr_reg)[4] = (regs)->rbp; \ 170 (pr_reg)[5] = (regs)->rbx; \ 171 (pr_reg)[6] = (regs)->r11; \ 172 (pr_reg)[7] = (regs)->r10; \ 173 (pr_reg)[8] = (regs)->r9; \ 174 (pr_reg)[9] = (regs)->r8; \ 175 (pr_reg)[10] = (regs)->rax; \ 176 (pr_reg)[11] = (regs)->rcx; \ 177 (pr_reg)[12] = (regs)->rdx; \ 178 (pr_reg)[13] = (regs)->rsi; \ 179 (pr_reg)[14] = (regs)->rdi; \ 180 (pr_reg)[15] = (regs)->orig_rax; \ 181 (pr_reg)[16] = (regs)->rip; \ 182 (pr_reg)[17] = (regs)->cs; \ 183 (pr_reg)[18] = (regs)->eflags; \ 184 (pr_reg)[19] = (regs)->rsp; \ 185 (pr_reg)[20] = (regs)->ss; \ 186 (pr_reg)[21] = current->thread.fs; \ 187 (pr_reg)[22] = current->thread.gs; \ 188 asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ 189 asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ 190 asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ 191 asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ 192 } while(0); 193 194 /* I'm not sure if we can use '-' here */ 195 #define ELF_PLATFORM ("x86_64") 196 extern void set_personality_64bit(void); 197 extern int vdso_enabled; 198 199 #endif /* !CONFIG_X86_32 */ 200 201 #define USE_ELF_CORE_DUMP 202 #define ELF_EXEC_PAGESIZE 4096 203 204 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 205 use of this is to invoke "./ld.so someprog" to test out a new version of 206 the loader. We need to make sure that it is out of the way of the program 207 that it will "exec", and that there is sufficient room for the brk. */ 208 209 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 210 211 /* This yields a mask that user programs can use to figure out what 212 instruction set this CPU supports. This could be done in user space, 213 but it's not easy, and we've already done it here. */ 214 215 #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) 216 217 /* This yields a string that ld.so will use to load implementation 218 specific libraries for optimization. This is more specific in 219 intent than poking at uname or /proc/cpuinfo. 220 221 For the moment, we have only optimizations for the Intel generations, 222 but that could change... */ 223 224 #define SET_PERSONALITY(ex, ibcs2) set_personality_64bit() 225 226 /* 227 * An executable for which elf_read_implies_exec() returns TRUE will 228 * have the READ_IMPLIES_EXEC personality flag set automatically. 229 */ 230 #define elf_read_implies_exec(ex, executable_stack) \ 231 (executable_stack != EXSTACK_DISABLE_X) 232 233 struct task_struct; 234 235 extern int dump_task_regs (struct task_struct *, elf_gregset_t *); 236 extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *); 237 238 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) 239 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs) 240 241 #ifdef CONFIG_X86_32 242 extern int dump_task_extended_fpu (struct task_struct *, 243 struct user_fxsr_struct *); 244 #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) \ 245 dump_task_extended_fpu(tsk, elf_xfpregs) 246 #define ELF_CORE_XFPREG_TYPE NT_PRXFPREG 247 248 #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) 249 #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) 250 #define VDSO_PRELINK 0 251 252 #define VDSO_SYM(x) \ 253 (VDSO_CURRENT_BASE + (unsigned long)(x) - VDSO_PRELINK) 254 255 #define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE) 256 #define VDSO_EHDR ((const struct elfhdr *) VDSO_CURRENT_BASE) 257 258 extern void __kernel_vsyscall; 259 260 #define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall) 261 262 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 263 264 #define ARCH_DLINFO \ 265 do if (vdso_enabled) { \ 266 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ 267 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ 268 } while (0) 269 270 #else /* CONFIG_X86_32 */ 271 272 /* 1GB for 64bit, 8MB for 32bit */ 273 #define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff) 274 275 #define ARCH_DLINFO \ 276 do if (vdso_enabled) { \ 277 NEW_AUX_ENT(AT_SYSINFO_EHDR,(unsigned long)current->mm->context.vdso);\ 278 } while (0) 279 280 #endif /* !CONFIG_X86_32 */ 281 282 struct linux_binprm; 283 284 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 285 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 286 int executable_stack); 287 288 #endif /* __KERNEL__ */ 289 290 #endif 291
