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1da177e4 LT |
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> | |
36d57ac4 | 10 | #include <asm/auxvec.h> |
1da177e4 | 11 | |
1da177e4 LT |
12 | #define R_386_NONE 0 |
13 | #define R_386_32 1 | |
14 | #define R_386_PC32 2 | |
15 | #define R_386_GOT32 3 | |
16 | #define R_386_PLT32 4 | |
17 | #define R_386_COPY 5 | |
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 | |
23 | #define R_386_NUM 11 | |
24 | ||
25 | typedef unsigned long elf_greg_t; | |
26 | ||
27 | #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t)) | |
28 | typedef elf_greg_t elf_gregset_t[ELF_NGREG]; | |
29 | ||
30 | typedef struct user_i387_struct elf_fpregset_t; | |
31 | typedef struct user_fxsr_struct elf_fpxregset_t; | |
32 | ||
33 | /* | |
34 | * This is used to ensure we don't load something for the wrong architecture. | |
35 | */ | |
36 | #define elf_check_arch(x) \ | |
37 | (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486)) | |
38 | ||
39 | /* | |
40 | * These are used to set parameters in the core dumps. | |
41 | */ | |
42 | #define ELF_CLASS ELFCLASS32 | |
43 | #define ELF_DATA ELFDATA2LSB | |
44 | #define ELF_ARCH EM_386 | |
45 | ||
651c923a DW |
46 | #ifdef __KERNEL__ |
47 | ||
48 | #include <asm/processor.h> | |
49 | #include <asm/system.h> /* for savesegment */ | |
50 | #include <asm/desc.h> | |
51 | ||
1da177e4 LT |
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. | |
56 | ||
57 | A value of 0 tells we have no such handler. | |
58 | ||
59 | We might as well make sure everything else is cleared too (except for %esp), | |
60 | just to make things more deterministic. | |
61 | */ | |
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; \ | |
65 | _r->eax = 0; \ | |
66 | } while (0) | |
67 | ||
68 | #define USE_ELF_CORE_DUMP | |
69 | #define ELF_EXEC_PAGESIZE 4096 | |
70 | ||
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. */ | |
75 | ||
76 | #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) | |
77 | ||
78 | /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is | |
79 | now struct_user_regs, they are different) */ | |
80 | ||
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; \ | |
6ea65ff7 RM |
89 | pr_reg[7] = regs->xds & 0xffff; \ |
90 | pr_reg[8] = regs->xes & 0xffff; \ | |
91 | pr_reg[9] = regs->xfs & 0xffff; \ | |
464d1a78 | 92 | savesegment(gs,pr_reg[10]); \ |
1da177e4 LT |
93 | pr_reg[11] = regs->orig_eax; \ |
94 | pr_reg[12] = regs->eip; \ | |
6ea65ff7 | 95 | pr_reg[13] = regs->xcs & 0xffff; \ |
1da177e4 LT |
96 | pr_reg[14] = regs->eflags; \ |
97 | pr_reg[15] = regs->esp; \ | |
6ea65ff7 | 98 | pr_reg[16] = regs->xss & 0xffff; |
1da177e4 LT |
99 | |
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. */ | |
103 | ||
104 | #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) | |
105 | ||
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. | |
109 | ||
110 | For the moment, we have only optimizations for the Intel generations, | |
111 | but that could change... */ | |
112 | ||
e9ff3990 | 113 | #define ELF_PLATFORM (utsname()->machine) |
1da177e4 | 114 | |
1da177e4 LT |
115 | #define SET_PERSONALITY(ex, ibcs2) do { } while (0) |
116 | ||
117 | /* | |
118 | * An executable for which elf_read_implies_exec() returns TRUE will | |
119 | * have the READ_IMPLIES_EXEC personality flag set automatically. | |
120 | */ | |
121 | #define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X) | |
122 | ||
8c65b4a6 TS |
123 | struct task_struct; |
124 | ||
1da177e4 LT |
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 *); | |
128 | ||
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 | ||
e6e5494c | 133 | #define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO)) |
d4f7a2c1 JF |
134 | #define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso) |
135 | #define VDSO_PRELINK 0 | |
e6e5494c | 136 | |
e6e5494c | 137 | #define VDSO_SYM(x) \ |
d4f7a2c1 | 138 | (VDSO_CURRENT_BASE + (unsigned long)(x) - VDSO_PRELINK) |
e6e5494c IM |
139 | |
140 | #define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE) | |
d4f7a2c1 | 141 | #define VDSO_EHDR ((const struct elfhdr *) VDSO_CURRENT_BASE) |
e6e5494c | 142 | |
1da177e4 LT |
143 | extern void __kernel_vsyscall; |
144 | ||
e6e5494c IM |
145 | #define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall) |
146 | ||
e6e5494c | 147 | struct linux_binprm; |
d4f7a2c1 JF |
148 | |
149 | #define ARCH_HAS_SETUP_ADDITIONAL_PAGES | |
e6e5494c IM |
150 | extern int arch_setup_additional_pages(struct linux_binprm *bprm, |
151 | int executable_stack); | |
152 | ||
153 | extern unsigned int vdso_enabled; | |
154 | ||
d4f7a2c1 JF |
155 | #define ARCH_DLINFO \ |
156 | do if (vdso_enabled) { \ | |
157 | NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \ | |
158 | NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \ | |
1da177e4 LT |
159 | } while (0) |
160 | ||
1da177e4 LT |
161 | #endif |
162 | ||
163 | #endif |