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1 | #ifndef __ASM_X86_64_ELF_H |
2 | #define __ASM_X86_64_ELF_H | |
3 | ||
4 | /* | |
5 | * ELF register definitions.. | |
6 | */ | |
7 | ||
8 | #include <asm/ptrace.h> | |
9 | #include <asm/user.h> | |
10 | #include <asm/processor.h> | |
11 | ||
12 | /* x86-64 relocation types */ | |
13 | #define R_X86_64_NONE 0 /* No reloc */ | |
14 | #define R_X86_64_64 1 /* Direct 64 bit */ | |
15 | #define R_X86_64_PC32 2 /* PC relative 32 bit signed */ | |
16 | #define R_X86_64_GOT32 3 /* 32 bit GOT entry */ | |
17 | #define R_X86_64_PLT32 4 /* 32 bit PLT address */ | |
18 | #define R_X86_64_COPY 5 /* Copy symbol at runtime */ | |
19 | #define R_X86_64_GLOB_DAT 6 /* Create GOT entry */ | |
20 | #define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */ | |
21 | #define R_X86_64_RELATIVE 8 /* Adjust by program base */ | |
22 | #define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative | |
23 | offset to GOT */ | |
24 | #define R_X86_64_32 10 /* Direct 32 bit zero extended */ | |
25 | #define R_X86_64_32S 11 /* Direct 32 bit sign extended */ | |
26 | #define R_X86_64_16 12 /* Direct 16 bit zero extended */ | |
27 | #define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */ | |
28 | #define R_X86_64_8 14 /* Direct 8 bit sign extended */ | |
29 | #define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */ | |
30 | ||
31 | #define R_X86_64_NUM 16 | |
32 | ||
33 | typedef unsigned long elf_greg_t; | |
34 | ||
35 | #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t)) | |
36 | typedef elf_greg_t elf_gregset_t[ELF_NGREG]; | |
37 | ||
38 | typedef struct user_i387_struct elf_fpregset_t; | |
39 | ||
40 | /* | |
41 | * This is used to ensure we don't load something for the wrong architecture. | |
42 | */ | |
43 | #define elf_check_arch(x) \ | |
44 | ((x)->e_machine == EM_X86_64) | |
45 | ||
46 | /* | |
47 | * These are used to set parameters in the core dumps. | |
48 | */ | |
49 | #define ELF_CLASS ELFCLASS64 | |
50 | #define ELF_DATA ELFDATA2LSB | |
51 | #define ELF_ARCH EM_X86_64 | |
52 | ||
53 | /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx | |
54 | contains a pointer to a function which might be registered using `atexit'. | |
55 | This provides a mean for the dynamic linker to call DT_FINI functions for | |
56 | shared libraries that have been loaded before the code runs. | |
57 | ||
58 | A value of 0 tells we have no such handler. | |
59 | ||
60 | We might as well make sure everything else is cleared too (except for %esp), | |
61 | just to make things more deterministic. | |
62 | */ | |
63 | #define ELF_PLAT_INIT(_r, load_addr) do { \ | |
64 | struct task_struct *cur = current; \ | |
65 | (_r)->rbx = 0; (_r)->rcx = 0; (_r)->rdx = 0; \ | |
66 | (_r)->rsi = 0; (_r)->rdi = 0; (_r)->rbp = 0; \ | |
67 | (_r)->rax = 0; \ | |
68 | (_r)->r8 = 0; \ | |
69 | (_r)->r9 = 0; \ | |
70 | (_r)->r10 = 0; \ | |
71 | (_r)->r11 = 0; \ | |
72 | (_r)->r12 = 0; \ | |
73 | (_r)->r13 = 0; \ | |
74 | (_r)->r14 = 0; \ | |
75 | (_r)->r15 = 0; \ | |
76 | cur->thread.fs = 0; cur->thread.gs = 0; \ | |
77 | cur->thread.fsindex = 0; cur->thread.gsindex = 0; \ | |
78 | cur->thread.ds = 0; cur->thread.es = 0; \ | |
79 | clear_thread_flag(TIF_IA32); \ | |
80 | } while (0) | |
81 | ||
82 | #define USE_ELF_CORE_DUMP | |
83 | #define ELF_EXEC_PAGESIZE 4096 | |
84 | ||
85 | /* This is the location that an ET_DYN program is loaded if exec'ed. Typical | |
86 | use of this is to invoke "./ld.so someprog" to test out a new version of | |
87 | the loader. We need to make sure that it is out of the way of the program | |
88 | that it will "exec", and that there is sufficient room for the brk. */ | |
89 | ||
90 | #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3) | |
91 | ||
92 | /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is | |
93 | now struct_user_regs, they are different). Assumes current is the process | |
94 | getting dumped. */ | |
95 | ||
96 | #define ELF_CORE_COPY_REGS(pr_reg, regs) do { \ | |
97 | unsigned v; \ | |
98 | (pr_reg)[0] = (regs)->r15; \ | |
99 | (pr_reg)[1] = (regs)->r14; \ | |
100 | (pr_reg)[2] = (regs)->r13; \ | |
101 | (pr_reg)[3] = (regs)->r12; \ | |
102 | (pr_reg)[4] = (regs)->rbp; \ | |
103 | (pr_reg)[5] = (regs)->rbx; \ | |
104 | (pr_reg)[6] = (regs)->r11; \ | |
105 | (pr_reg)[7] = (regs)->r10; \ | |
106 | (pr_reg)[8] = (regs)->r9; \ | |
107 | (pr_reg)[9] = (regs)->r8; \ | |
108 | (pr_reg)[10] = (regs)->rax; \ | |
109 | (pr_reg)[11] = (regs)->rcx; \ | |
110 | (pr_reg)[12] = (regs)->rdx; \ | |
111 | (pr_reg)[13] = (regs)->rsi; \ | |
112 | (pr_reg)[14] = (regs)->rdi; \ | |
113 | (pr_reg)[15] = (regs)->orig_rax; \ | |
114 | (pr_reg)[16] = (regs)->rip; \ | |
115 | (pr_reg)[17] = (regs)->cs; \ | |
116 | (pr_reg)[18] = (regs)->eflags; \ | |
117 | (pr_reg)[19] = (regs)->rsp; \ | |
118 | (pr_reg)[20] = (regs)->ss; \ | |
119 | (pr_reg)[21] = current->thread.fs; \ | |
120 | (pr_reg)[22] = current->thread.gs; \ | |
121 | asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \ | |
122 | asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \ | |
123 | asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \ | |
124 | asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \ | |
125 | } while(0); | |
126 | ||
127 | /* This yields a mask that user programs can use to figure out what | |
128 | instruction set this CPU supports. This could be done in user space, | |
129 | but it's not easy, and we've already done it here. */ | |
130 | ||
131 | #define ELF_HWCAP (boot_cpu_data.x86_capability[0]) | |
132 | ||
133 | /* This yields a string that ld.so will use to load implementation | |
134 | specific libraries for optimization. This is more specific in | |
135 | intent than poking at uname or /proc/cpuinfo. | |
136 | ||
137 | For the moment, we have only optimizations for the Intel generations, | |
138 | but that could change... */ | |
139 | ||
140 | /* I'm not sure if we can use '-' here */ | |
141 | #define ELF_PLATFORM ("x86_64") | |
142 | ||
143 | #ifdef __KERNEL__ | |
144 | extern void set_personality_64bit(void); | |
145 | #define SET_PERSONALITY(ex, ibcs2) set_personality_64bit() | |
146 | /* | |
147 | * An executable for which elf_read_implies_exec() returns TRUE will | |
148 | * have the READ_IMPLIES_EXEC personality flag set automatically. | |
149 | */ | |
150 | #define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X) | |
151 | ||
152 | extern int dump_task_regs (struct task_struct *, elf_gregset_t *); | |
153 | extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *); | |
154 | ||
155 | #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) | |
156 | #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs) | |
157 | ||
158 | #endif | |
159 | ||
160 | #endif |