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