1 #ifndef __ASMi386_ELF_H
2 #define __ASMi386_ELF_H
5 * ELF register definitions..
8 #include <asm/ptrace.h>
10 #include <asm/auxvec.h>
18 #define R_386_GLOB_DAT 6
19 #define R_386_JMP_SLOT 7
20 #define R_386_RELATIVE 8
21 #define R_386_GOTOFF 9
22 #define R_386_GOTPC 10
25 typedef unsigned long elf_greg_t
;
27 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
28 typedef elf_greg_t elf_gregset_t
[ELF_NGREG
];
30 typedef struct user_i387_struct elf_fpregset_t
;
31 typedef struct user_fxsr_struct elf_fpxregset_t
;
34 * This is used to ensure we don't load something for the wrong architecture.
36 #define elf_check_arch(x) \
37 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
40 * These are used to set parameters in the core dumps.
42 #define ELF_CLASS ELFCLASS32
43 #define ELF_DATA ELFDATA2LSB
44 #define ELF_ARCH EM_386
48 #include <asm/processor.h>
49 #include <asm/system.h> /* for savesegment */
52 /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
53 contains a pointer to a function which might be registered using `atexit'.
54 This provides a mean for the dynamic linker to call DT_FINI functions for
55 shared libraries that have been loaded before the code runs.
57 A value of 0 tells we have no such handler.
59 We might as well make sure everything else is cleared too (except for %esp),
60 just to make things more deterministic.
62 #define ELF_PLAT_INIT(_r, load_addr) do { \
63 _r->ebx = 0; _r->ecx = 0; _r->edx = 0; \
64 _r->esi = 0; _r->edi = 0; _r->ebp = 0; \
68 #define USE_ELF_CORE_DUMP
69 #define ELF_EXEC_PAGESIZE 4096
71 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
72 use of this is to invoke "./ld.so someprog" to test out a new version of
73 the loader. We need to make sure that it is out of the way of the program
74 that it will "exec", and that there is sufficient room for the brk. */
76 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
78 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
79 now struct_user_regs, they are different) */
81 #define ELF_CORE_COPY_REGS(pr_reg, regs) \
82 pr_reg[0] = regs->ebx; \
83 pr_reg[1] = regs->ecx; \
84 pr_reg[2] = regs->edx; \
85 pr_reg[3] = regs->esi; \
86 pr_reg[4] = regs->edi; \
87 pr_reg[5] = regs->ebp; \
88 pr_reg[6] = regs->eax; \
89 pr_reg[7] = regs->xds & 0xffff; \
90 pr_reg[8] = regs->xes & 0xffff; \
91 pr_reg[9] = regs->xfs & 0xffff; \
92 savesegment(gs,pr_reg[10]); \
93 pr_reg[11] = regs->orig_eax; \
94 pr_reg[12] = regs->eip; \
95 pr_reg[13] = regs->xcs & 0xffff; \
96 pr_reg[14] = regs->eflags; \
97 pr_reg[15] = regs->esp; \
98 pr_reg[16] = regs->xss & 0xffff;
100 /* This yields a mask that user programs can use to figure out what
101 instruction set this CPU supports. This could be done in user space,
102 but it's not easy, and we've already done it here. */
104 #define ELF_HWCAP (boot_cpu_data.x86_capability[0])
106 /* This yields a string that ld.so will use to load implementation
107 specific libraries for optimization. This is more specific in
108 intent than poking at uname or /proc/cpuinfo.
110 For the moment, we have only optimizations for the Intel generations,
111 but that could change... */
113 #define ELF_PLATFORM (utsname()->machine)
115 #define SET_PERSONALITY(ex, ibcs2) do { } while (0)
118 * An executable for which elf_read_implies_exec() returns TRUE will
119 * have the READ_IMPLIES_EXEC personality flag set automatically.
121 #define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
125 extern int dump_task_regs (struct task_struct
*, elf_gregset_t
*);
126 extern int dump_task_fpu (struct task_struct
*, elf_fpregset_t
*);
127 extern int dump_task_extended_fpu (struct task_struct
*, struct user_fxsr_struct
*);
129 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
130 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
131 #define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) dump_task_extended_fpu(tsk, elf_xfpregs)
132 #define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
134 #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
135 #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
136 #define VDSO_PRELINK 0
138 #define VDSO_SYM(x) \
139 (VDSO_CURRENT_BASE + (unsigned long)(x) - VDSO_PRELINK)
141 #define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE)
142 #define VDSO_EHDR ((const struct elfhdr *) VDSO_CURRENT_BASE)
144 extern void __kernel_vsyscall
;
146 #define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall)
150 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
151 extern int arch_setup_additional_pages(struct linux_binprm
*bprm
,
152 int executable_stack
);
154 extern unsigned int vdso_enabled
;
156 #define ARCH_DLINFO \
157 do if (vdso_enabled) { \
158 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
159 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \