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
69extern char * elf_aux_platform;
70#define ELF_PLATFORM (elf_aux_platform)
71
72extern unsigned long vsyscall_ehdr;
73extern unsigned long vsyscall_end;
74extern 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						\
92do {								\
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#define R_X86_64_PC64		24	/* Place relative 64-bit signed */
120
121/*
122 * This is used to ensure we don't load something for the wrong architecture.
123 */
124#define elf_check_arch(x) \
125	((x)->e_machine == EM_X86_64)
126
127#define ELF_CLASS	ELFCLASS64
128#define ELF_DATA        ELFDATA2LSB
129#define ELF_ARCH        EM_X86_64
130
131#define ELF_PLAT_INIT(regs, load_addr)    do { \
132	PT_REGS_BX(regs) = 0; \
133	PT_REGS_CX(regs) = 0; \
134	PT_REGS_DX(regs) = 0; \
135	PT_REGS_SI(regs) = 0; \
136	PT_REGS_DI(regs) = 0; \
137	PT_REGS_BP(regs) = 0; \
138	PT_REGS_AX(regs) = 0; \
139	PT_REGS_R8(regs) = 0; \
140	PT_REGS_R9(regs) = 0; \
141	PT_REGS_R10(regs) = 0; \
142	PT_REGS_R11(regs) = 0; \
143	PT_REGS_R12(regs) = 0; \
144	PT_REGS_R13(regs) = 0; \
145	PT_REGS_R14(regs) = 0; \
146	PT_REGS_R15(regs) = 0; \
147} while (0)
148
149#define ELF_CORE_COPY_REGS(pr_reg, _regs)		\
150	(pr_reg)[0] = (_regs)->regs.gp[0];			\
151	(pr_reg)[1] = (_regs)->regs.gp[1];			\
152	(pr_reg)[2] = (_regs)->regs.gp[2];			\
153	(pr_reg)[3] = (_regs)->regs.gp[3];			\
154	(pr_reg)[4] = (_regs)->regs.gp[4];			\
155	(pr_reg)[5] = (_regs)->regs.gp[5];			\
156	(pr_reg)[6] = (_regs)->regs.gp[6];			\
157	(pr_reg)[7] = (_regs)->regs.gp[7];			\
158	(pr_reg)[8] = (_regs)->regs.gp[8];			\
159	(pr_reg)[9] = (_regs)->regs.gp[9];			\
160	(pr_reg)[10] = (_regs)->regs.gp[10];			\
161	(pr_reg)[11] = (_regs)->regs.gp[11];			\
162	(pr_reg)[12] = (_regs)->regs.gp[12];			\
163	(pr_reg)[13] = (_regs)->regs.gp[13];			\
164	(pr_reg)[14] = (_regs)->regs.gp[14];			\
165	(pr_reg)[15] = (_regs)->regs.gp[15];			\
166	(pr_reg)[16] = (_regs)->regs.gp[16];			\
167	(pr_reg)[17] = (_regs)->regs.gp[17];			\
168	(pr_reg)[18] = (_regs)->regs.gp[18];			\
169	(pr_reg)[19] = (_regs)->regs.gp[19];			\
170	(pr_reg)[20] = (_regs)->regs.gp[20];			\
171	(pr_reg)[21] = (_regs)->regs.gp[21];			\
172	(pr_reg)[22] = (_regs)->regs.gp[22];			\
173	(pr_reg)[23] = 0;					\
174	(pr_reg)[24] = 0;					\
175	(pr_reg)[25] = 0;					\
176	(pr_reg)[26] = 0;
177
178#define ELF_PLATFORM "x86_64"
179
180/* No user-accessible fixmap addresses, i.e. vsyscall */
181#define FIXADDR_USER_START      0
182#define FIXADDR_USER_END        0
183
184#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
185struct linux_binprm;
186extern int arch_setup_additional_pages(struct linux_binprm *bprm,
187	int uses_interp);
188
189extern unsigned long um_vdso_addr;
190#define AT_SYSINFO_EHDR 33
191#define ARCH_DLINFO	NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
192
193#endif
194
195typedef unsigned long elf_greg_t;
196
197#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
198typedef elf_greg_t elf_gregset_t[ELF_NGREG];
199
200typedef struct user_i387_struct elf_fpregset_t;
201
202struct task_struct;
203
204#define ELF_EXEC_PAGESIZE 4096
205
206#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
207
208extern long elf_aux_hwcap;
209#define ELF_HWCAP (elf_aux_hwcap)
210
211#define SET_PERSONALITY(ex) do {} while(0)
212
213#endif
214