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elf.h
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1 /*
2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3  * Licensed under the GPL
4  */
5 #ifndef __UM_ELF_X86_H
6 #define __UM_ELF_X86_H
7 
8 #include <asm/user.h>
9 #include <skas.h>
10 
11 #ifdef CONFIG_X86_32
12 
13 #define R_386_NONE 0
14 #define R_386_32 1
15 #define R_386_PC32 2
16 #define R_386_GOT32 3
17 #define R_386_PLT32 4
18 #define R_386_COPY 5
19 #define R_386_GLOB_DAT 6
20 #define R_386_JMP_SLOT 7
21 #define R_386_RELATIVE 8
22 #define R_386_GOTOFF 9
23 #define R_386_GOTPC 10
24 #define R_386_NUM 11
25 
26 /*
27  * This is used to ensure we don't load something for the wrong architecture.
28  */
29 #define elf_check_arch(x) \
30  (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
31 
32 #define ELF_CLASS ELFCLASS32
33 #define ELF_DATA ELFDATA2LSB
34 #define ELF_ARCH EM_386
35 
36 #define ELF_PLAT_INIT(regs, load_addr) do { \
37  PT_REGS_BX(regs) = 0; \
38  PT_REGS_CX(regs) = 0; \
39  PT_REGS_DX(regs) = 0; \
40  PT_REGS_SI(regs) = 0; \
41  PT_REGS_DI(regs) = 0; \
42  PT_REGS_BP(regs) = 0; \
43  PT_REGS_AX(regs) = 0; \
44 } while (0)
45 
46 /* Shamelessly stolen from include/asm-i386/elf.h */
47 
48 #define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
49  pr_reg[0] = PT_REGS_BX(regs); \
50  pr_reg[1] = PT_REGS_CX(regs); \
51  pr_reg[2] = PT_REGS_DX(regs); \
52  pr_reg[3] = PT_REGS_SI(regs); \
53  pr_reg[4] = PT_REGS_DI(regs); \
54  pr_reg[5] = PT_REGS_BP(regs); \
55  pr_reg[6] = PT_REGS_AX(regs); \
56  pr_reg[7] = PT_REGS_DS(regs); \
57  pr_reg[8] = PT_REGS_ES(regs); \
58  /* fake once used fs and gs selectors? */ \
59  pr_reg[9] = PT_REGS_DS(regs); \
60  pr_reg[10] = PT_REGS_DS(regs); \
61  pr_reg[11] = PT_REGS_SYSCALL_NR(regs); \
62  pr_reg[12] = PT_REGS_IP(regs); \
63  pr_reg[13] = PT_REGS_CS(regs); \
64  pr_reg[14] = PT_REGS_EFLAGS(regs); \
65  pr_reg[15] = PT_REGS_SP(regs); \
66  pr_reg[16] = PT_REGS_SS(regs); \
67 } while (0);
68 
69 extern char * elf_aux_platform;
70 #define ELF_PLATFORM (elf_aux_platform)
71 
72 extern unsigned long vsyscall_ehdr;
73 extern unsigned long vsyscall_end;
74 extern unsigned long __kernel_vsyscall;
75 
76 /*
77  * This is the range that is readable by user mode, and things
78  * acting like user mode such as get_user_pages.
79  */
80 #define FIXADDR_USER_START vsyscall_ehdr
81 #define FIXADDR_USER_END vsyscall_end
82 
83 
84 /*
85  * Architecture-neutral AT_ values in 0-17, leave some room
86  * for more of them, start the x86-specific ones at 32.
87  */
88 #define AT_SYSINFO 32
89 #define AT_SYSINFO_EHDR 33
90 
91 #define ARCH_DLINFO \
92 do { \
93  if ( vsyscall_ehdr ) { \
94  NEW_AUX_ENT(AT_SYSINFO, __kernel_vsyscall); \
95  NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr); \
96  } \
97 } while (0)
98 
99 #else
100 
101 /* x86-64 relocation types, taken from asm-x86_64/elf.h */
102 #define R_X86_64_NONE 0 /* No reloc */
103 #define R_X86_64_64 1 /* Direct 64 bit */
104 #define R_X86_64_PC32 2 /* PC relative 32 bit signed */
105 #define R_X86_64_GOT32 3 /* 32 bit GOT entry */
106 #define R_X86_64_PLT32 4 /* 32 bit PLT address */
107 #define R_X86_64_COPY 5 /* Copy symbol at runtime */
108 #define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
109 #define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
110 #define R_X86_64_RELATIVE 8 /* Adjust by program base */
111 #define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
112  offset to GOT */
113 #define R_X86_64_32 10 /* Direct 32 bit zero extended */
114 #define R_X86_64_32S 11 /* Direct 32 bit sign extended */
115 #define R_X86_64_16 12 /* Direct 16 bit zero extended */
116 #define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
117 #define R_X86_64_8 14 /* Direct 8 bit sign extended */
118 #define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
119 
120 #define R_X86_64_NUM 16
121 
122 /*
123  * This is used to ensure we don't load something for the wrong architecture.
124  */
125 #define elf_check_arch(x) \
126  ((x)->e_machine == EM_X86_64)
127 
128 #define ELF_CLASS ELFCLASS64
129 #define ELF_DATA ELFDATA2LSB
130 #define ELF_ARCH EM_X86_64
131 
132 #define ELF_PLAT_INIT(regs, load_addr) do { \
133  PT_REGS_BX(regs) = 0; \
134  PT_REGS_CX(regs) = 0; \
135  PT_REGS_DX(regs) = 0; \
136  PT_REGS_SI(regs) = 0; \
137  PT_REGS_DI(regs) = 0; \
138  PT_REGS_BP(regs) = 0; \
139  PT_REGS_AX(regs) = 0; \
140  PT_REGS_R8(regs) = 0; \
141  PT_REGS_R9(regs) = 0; \
142  PT_REGS_R10(regs) = 0; \
143  PT_REGS_R11(regs) = 0; \
144  PT_REGS_R12(regs) = 0; \
145  PT_REGS_R13(regs) = 0; \
146  PT_REGS_R14(regs) = 0; \
147  PT_REGS_R15(regs) = 0; \
148 } while (0)
149 
150 #define ELF_CORE_COPY_REGS(pr_reg, _regs) \
151  (pr_reg)[0] = (_regs)->regs.gp[0]; \
152  (pr_reg)[1] = (_regs)->regs.gp[1]; \
153  (pr_reg)[2] = (_regs)->regs.gp[2]; \
154  (pr_reg)[3] = (_regs)->regs.gp[3]; \
155  (pr_reg)[4] = (_regs)->regs.gp[4]; \
156  (pr_reg)[5] = (_regs)->regs.gp[5]; \
157  (pr_reg)[6] = (_regs)->regs.gp[6]; \
158  (pr_reg)[7] = (_regs)->regs.gp[7]; \
159  (pr_reg)[8] = (_regs)->regs.gp[8]; \
160  (pr_reg)[9] = (_regs)->regs.gp[9]; \
161  (pr_reg)[10] = (_regs)->regs.gp[10]; \
162  (pr_reg)[11] = (_regs)->regs.gp[11]; \
163  (pr_reg)[12] = (_regs)->regs.gp[12]; \
164  (pr_reg)[13] = (_regs)->regs.gp[13]; \
165  (pr_reg)[14] = (_regs)->regs.gp[14]; \
166  (pr_reg)[15] = (_regs)->regs.gp[15]; \
167  (pr_reg)[16] = (_regs)->regs.gp[16]; \
168  (pr_reg)[17] = (_regs)->regs.gp[17]; \
169  (pr_reg)[18] = (_regs)->regs.gp[18]; \
170  (pr_reg)[19] = (_regs)->regs.gp[19]; \
171  (pr_reg)[20] = (_regs)->regs.gp[20]; \
172  (pr_reg)[21] = current->thread.arch.fs; \
173  (pr_reg)[22] = 0; \
174  (pr_reg)[23] = 0; \
175  (pr_reg)[24] = 0; \
176  (pr_reg)[25] = 0; \
177  (pr_reg)[26] = 0;
178 
179 #define ELF_PLATFORM "x86_64"
180 
181 /* No user-accessible fixmap addresses, i.e. vsyscall */
182 #define FIXADDR_USER_START 0
183 #define FIXADDR_USER_END 0
184 
185 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
186 struct linux_binprm;
187 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
188  int uses_interp);
189 
190 extern unsigned long um_vdso_addr;
191 #define AT_SYSINFO_EHDR 33
192 #define ARCH_DLINFO NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
193 
194 #endif
195 
196 typedef unsigned long elf_greg_t;
197 
198 #define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
199 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
200 
201 typedef struct user_i387_struct elf_fpregset_t;
202 
203 #define task_pt_regs(t) (&(t)->thread.regs)
204 
205 struct task_struct;
206 
207 extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
208 
209 #define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
210 
211 #define ELF_EXEC_PAGESIZE 4096
212 
213 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
214 
215 extern long elf_aux_hwcap;
216 #define ELF_HWCAP (elf_aux_hwcap)
217 
218 #define SET_PERSONALITY(ex) do ; while(0)
219 #define __HAVE_ARCH_GATE_AREA 1
220 
221 #endif
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