include/asm-x86/elf.h

   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