include/asm-um/archparam-i386.h

   1 /*
   2  * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __UM_ARCHPARAM_I386_H
   7 #define __UM_ARCHPARAM_I386_H
   8
   9 /********* Bits for asm-um/elf.h ************/
  10
  11 #include "user.h"
  12
  13 #define ELF_PLATFORM "i586"
  14
  15 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
  16
  17 typedef struct user_i387_struct elf_fpregset_t;
  18 typedef unsigned long elf_greg_t;
  19
  20 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
  21 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  22
  23 #define ELF_DATA        ELFDATA2LSB
  24 #define ELF_ARCH        EM_386
  25
  26 #define ELF_PLAT_INIT(regs, load_addr) do { \
  27         PT_REGS_EBX(regs) = 0; \
  28         PT_REGS_ECX(regs) = 0; \
  29         PT_REGS_EDX(regs) = 0; \
  30         PT_REGS_ESI(regs) = 0; \
  31         PT_REGS_EDI(regs) = 0; \
  32         PT_REGS_EBP(regs) = 0; \
  33         PT_REGS_EAX(regs) = 0; \
  34 } while(0)
  35
  36 /* Shamelessly stolen from include/asm-i386/elf.h */
  37
  38 #define ELF_CORE_COPY_REGS(pr_reg, regs) do {   \
  39         pr_reg[0] = PT_REGS_EBX(regs);          \
  40         pr_reg[1] = PT_REGS_ECX(regs);          \
  41         pr_reg[2] = PT_REGS_EDX(regs);          \
  42         pr_reg[3] = PT_REGS_ESI(regs);          \
  43         pr_reg[4] = PT_REGS_EDI(regs);          \
  44         pr_reg[5] = PT_REGS_EBP(regs);          \
  45         pr_reg[6] = PT_REGS_EAX(regs);          \
  46         pr_reg[7] = PT_REGS_DS(regs);           \
  47         pr_reg[8] = PT_REGS_ES(regs);           \
  48         /* fake once used fs and gs selectors? */       \
  49         pr_reg[9] = PT_REGS_DS(regs);           \
  50         pr_reg[10] = PT_REGS_DS(regs);          \
  51         pr_reg[11] = PT_REGS_SYSCALL_NR(regs);  \
  52         pr_reg[12] = PT_REGS_IP(regs);          \
  53         pr_reg[13] = PT_REGS_CS(regs);          \
  54         pr_reg[14] = PT_REGS_EFLAGS(regs);      \
  55         pr_reg[15] = PT_REGS_SP(regs);          \
  56         pr_reg[16] = PT_REGS_SS(regs);          \
  57 } while(0);
  58
  59 #if 0 /* Turn this back on when UML has VSYSCALL working */
  60 #define VSYSCALL_BASE   (__fix_to_virt(FIX_VSYSCALL))
  61 #else
  62 #define VSYSCALL_BASE   0
  63 #endif
  64
  65 #define VSYSCALL_EHDR   ((const struct elfhdr *) VSYSCALL_BASE)
  66 #define VSYSCALL_ENTRY  ((unsigned long) &__kernel_vsyscall)
  67 extern void *__kernel_vsyscall;
  68
  69 /*
  70  * Architecture-neutral AT_ values in 0-17, leave some room
  71  * for more of them, start the x86-specific ones at 32.
  72  */
  73 #define AT_SYSINFO              32
  74 #define AT_SYSINFO_EHDR         33
  75
  76 #define ARCH_DLINFO                                             \
  77 do {                                                            \
  78                 NEW_AUX_ENT(AT_SYSINFO, VSYSCALL_ENTRY);        \
  79                 NEW_AUX_ENT(AT_SYSINFO_EHDR, VSYSCALL_BASE);    \
  80 } while (0)
  81
  82 /*
  83  * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
  84  * extra segments containing the vsyscall DSO contents.  Dumping its
  85  * contents makes post-mortem fully interpretable later without matching up
  86  * the same kernel and hardware config to see what PC values meant.
  87  * Dumping its extra ELF program headers includes all the other information
  88  * a debugger needs to easily find how the vsyscall DSO was being used.
  89  */
  90 #if 0
  91 #define ELF_CORE_EXTRA_PHDRS            (VSYSCALL_EHDR->e_phnum)
  92 #endif
  93
  94 #undef ELF_CORE_EXTRA_PHDRS
  95
  96 #if 0
  97 #define ELF_CORE_WRITE_EXTRA_PHDRS                                            \
  98 do {                                                                          \
  99         const struct elf_phdr *const vsyscall_phdrs =                         \
 100                 (const struct elf_phdr *) (VSYSCALL_BASE                      \
 101                                            + VSYSCALL_EHDR->e_phoff);         \
 102         int i;                                                                \
 103         Elf32_Off ofs = 0;                                                    \
 104         for (i = 0; i < VSYSCALL_EHDR->e_phnum; ++i) {                        \
 105                 struct elf_phdr phdr = vsyscall_phdrs[i];                     \
 106                 if (phdr.p_type == PT_LOAD) {                                 \
 107                         ofs = phdr.p_offset = offset;                         \
 108                         offset += phdr.p_filesz;                              \
 109                 }                                                             \
 110                 else                                                          \
 111                         phdr.p_offset += ofs;                                 \
 112                 phdr.p_paddr = 0; /* match other core phdrs */                \
 113                 DUMP_WRITE(&phdr, sizeof(phdr));                              \
 114         }                                                                     \
 115 } while (0)
 116 #define ELF_CORE_WRITE_EXTRA_DATA                                             \
 117 do {                                                                          \
 118         const struct elf_phdr *const vsyscall_phdrs =                         \
 119                 (const struct elf_phdr *) (VSYSCALL_BASE                      \
 120                                            + VSYSCALL_EHDR->e_phoff);         \
 121         int i;                                                                \
 122         for (i = 0; i < VSYSCALL_EHDR->e_phnum; ++i) {                        \
 123                 if (vsyscall_phdrs[i].p_type == PT_LOAD)                      \
 124                         DUMP_WRITE((void *) vsyscall_phdrs[i].p_vaddr,        \
 125                                    vsyscall_phdrs[i].p_filesz);               \
 126         }                                                                     \
 127 } while (0)
 128 #endif
 129
 130 #undef ELF_CORE_WRITE_EXTRA_PHDRS
 131 #undef ELF_CORE_WRITE_EXTRA_DATA
 132
 133 #define R_386_NONE      0
 134 #define R_386_32        1
 135 #define R_386_PC32      2
 136 #define R_386_GOT32     3
 137 #define R_386_PLT32     4
 138 #define R_386_COPY      5
 139 #define R_386_GLOB_DAT  6
 140 #define R_386_JMP_SLOT  7
 141 #define R_386_RELATIVE  8
 142 #define R_386_GOTOFF    9
 143 #define R_386_GOTPC     10
 144 #define R_386_NUM       11
 145
 146 /********* Bits for asm-um/delay.h **********/
 147
 148 typedef unsigned long um_udelay_t;
 149
 150 /********* Nothing for asm-um/hardirq.h **********/
 151
 152 /********* Nothing for asm-um/hw_irq.h **********/
 153
 154 /********* Nothing for asm-um/string.h **********/
 155
 156 #endif
 157
 158 /*
 159  * Overrides for Emacs so that we follow Linus's tabbing style.
 160  * Emacs will notice this stuff at the end of the file and automatically
 161  * adjust the settings for this buffer only.  This must remain at the end
 162  * of the file.
 163  * ---------------------------------------------------------------------------
 164  * Local variables:
 165  * c-file-style: "linux"
 166  * End:
 167  */