i386/linux/linux-2.3.21/include/asm-i386/elf.h

   1 #ifndef __ASMi386_ELF_H
   2 #define __ASMi386_ELF_H
   3
   4 /*
   5  * ELF register definitions..
   6  */
   7
   8 #include <asm/ptrace.h>
   9 #include <asm/user.h>
  10
  11 typedef unsigned long elf_greg_t;
  12
  13 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
  14 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  15
  16 typedef struct user_i387_struct elf_fpregset_t;
  17
  18 /*
  19  * This is used to ensure we don't load something for the wrong architecture.
  20  */
  21 #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
  22
  23 /*
  24  * These are used to set parameters in the core dumps.
  25  */
  26 #define ELF_CLASS       ELFCLASS32
  27 #define ELF_DATA        ELFDATA2LSB
  28 #define ELF_ARCH        EM_386
  29
  30 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
  31    contains a pointer to a function which might be registered using `atexit'.
  32    This provides a mean for the dynamic linker to call DT_FINI functions for
  33    shared libraries that have been loaded before the code runs.
  34
  35    A value of 0 tells we have no such handler.
  36
  37    We might as well make sure everything else is cleared too (except for %esp),
  38    just to make things more deterministic.
  39  */
  40 #define ELF_PLAT_INIT(_r)       do { \
  41         _r->ebx = 0; _r->ecx = 0; _r->edx = 0; \
  42         _r->esi = 0; _r->edi = 0; _r->ebp = 0; \
  43         _r->eax = 0; \
  44 } while (0)
  45
  46 #define USE_ELF_CORE_DUMP
  47 #define ELF_EXEC_PAGESIZE       4096
  48
  49 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  50    use of this is to invoke "./ld.so someprog" to test out a new version of
  51    the loader.  We need to make sure that it is out of the way of the program
  52    that it will "exec", and that there is sufficient room for the brk.  */
  53
  54 #define ELF_ET_DYN_BASE         (2 * TASK_SIZE / 3)
  55
  56 /* Wow, the "main" arch needs arch dependent functions too.. :) */
  57
  58 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
  59    now struct_user_regs, they are different) */
  60
  61 #define ELF_CORE_COPY_REGS(pr_reg, regs)                \
  62         pr_reg[0] = regs->ebx;                          \
  63         pr_reg[1] = regs->ecx;                          \
  64         pr_reg[2] = regs->edx;                          \
  65         pr_reg[3] = regs->esi;                          \
  66         pr_reg[4] = regs->edi;                          \
  67         pr_reg[5] = regs->ebp;                          \
  68         pr_reg[6] = regs->eax;                          \
  69         pr_reg[7] = regs->xds;                          \
  70         pr_reg[8] = regs->xes;                          \
  71         /* fake once used fs and gs selectors? */       \
  72         pr_reg[9] = regs->xds;  /* was fs and __fs */   \
  73         pr_reg[10] = regs->xds; /* was gs and __gs */   \
  74         pr_reg[11] = regs->orig_eax;                    \
  75         pr_reg[12] = regs->eip;                         \
  76         pr_reg[13] = regs->xcs;                         \
  77         pr_reg[14] = regs->eflags;                      \
  78         pr_reg[15] = regs->esp;                         \
  79         pr_reg[16] = regs->xss;
  80
  81 /* This yields a mask that user programs can use to figure out what
  82    instruction set this CPU supports.  This could be done in user space,
  83    but it's not easy, and we've already done it here.  */
  84
  85 #define ELF_HWCAP       (boot_cpu_data.x86_capability)
  86
  87 /* This yields a string that ld.so will use to load implementation
  88    specific libraries for optimization.  This is more specific in
  89    intent than poking at uname or /proc/cpuinfo.
  90
  91    For the moment, we have only optimizations for the Intel generations,
  92    but that could change... */
  93
  94 #define ELF_PLATFORM  ("i386\0i486\0i586\0i686"+((boot_cpu_data.x86-3)*5))
  95
  96 #ifdef __KERNEL__
  97 #define SET_PERSONALITY(ex, ibcs2) \
  98         current->personality = (ibcs2 ? PER_SVR4 : PER_LINUX)
  99 #endif
 100
 101 #endif