ia64/linux-2.6.18-xen.hg

view include/asm-i386/elf.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children 906b14e26f2f
line source
1 #ifndef __ASMi386_ELF_H
2 #define __ASMi386_ELF_H
4 /*
5 * ELF register definitions..
6 */
8 #include <asm/ptrace.h>
9 #include <asm/user.h>
10 #include <asm/auxvec.h>
12 #include <linux/utsname.h>
14 #define R_386_NONE 0
15 #define R_386_32 1
16 #define R_386_PC32 2
17 #define R_386_GOT32 3
18 #define R_386_PLT32 4
19 #define R_386_COPY 5
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
25 #define R_386_NUM 11
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;
35 /*
36 * This is used to ensure we don't load something for the wrong architecture.
37 */
38 #define elf_check_arch(x) \
39 (((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
41 /*
42 * These are used to set parameters in the core dumps.
43 */
44 #define ELF_CLASS ELFCLASS32
45 #define ELF_DATA ELFDATA2LSB
46 #define ELF_ARCH EM_386
48 #ifdef __KERNEL__
50 #include <asm/processor.h>
51 #include <asm/system.h> /* for savesegment */
52 #include <asm/desc.h>
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.
63 */
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; \
67 _r->eax = 0; \
68 } while (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; \
92 pr_reg[8] = regs->xes; \
93 savesegment(fs,pr_reg[9]); \
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; \
98 pr_reg[14] = regs->eflags; \
99 pr_reg[15] = regs->esp; \
100 pr_reg[16] = regs->xss;
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 (system_utsname.machine)
117 #define SET_PERSONALITY(ex, ibcs2) do { } while (0)
119 /*
120 * An executable for which elf_read_implies_exec() returns TRUE will
121 * have the READ_IMPLIES_EXEC personality flag set automatically.
122 */
123 #define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
125 struct task_struct;
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_BASE ((unsigned long)current->mm->context.vdso)
138 #ifdef CONFIG_COMPAT_VDSO
139 # define VDSO_COMPAT_BASE VDSO_HIGH_BASE
140 # define VDSO_PRELINK VDSO_HIGH_BASE
141 #else
142 # define VDSO_COMPAT_BASE VDSO_BASE
143 # define VDSO_PRELINK 0
144 #endif
146 #define VDSO_COMPAT_SYM(x) \
147 (VDSO_COMPAT_BASE + (unsigned long)(x) - VDSO_PRELINK)
149 #define VDSO_SYM(x) \
150 (VDSO_BASE + (unsigned long)(x) - VDSO_PRELINK)
152 #define VDSO_HIGH_EHDR ((const struct elfhdr *) VDSO_HIGH_BASE)
153 #define VDSO_EHDR ((const struct elfhdr *) VDSO_COMPAT_BASE)
155 extern void __kernel_vsyscall;
157 #define VDSO_ENTRY VDSO_SYM(&__kernel_vsyscall)
159 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
160 struct linux_binprm;
161 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
162 int executable_stack);
164 extern unsigned int vdso_enabled;
166 #define ARCH_DLINFO \
167 do if (vdso_enabled) { \
168 NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
169 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_COMPAT_BASE); \
170 } while (0)
172 /*
173 * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
174 * extra segments containing the vsyscall DSO contents. Dumping its
175 * contents makes post-mortem fully interpretable later without matching up
176 * the same kernel and hardware config to see what PC values meant.
177 * Dumping its extra ELF program headers includes all the other information
178 * a debugger needs to easily find how the vsyscall DSO was being used.
179 */
180 #define ELF_CORE_EXTRA_PHDRS (VDSO_HIGH_EHDR->e_phnum)
181 #define ELF_CORE_WRITE_EXTRA_PHDRS \
182 do { \
183 const struct elf_phdr *const vsyscall_phdrs = \
184 (const struct elf_phdr *) (VDSO_HIGH_BASE \
185 + VDSO_HIGH_EHDR->e_phoff); \
186 int i; \
187 Elf32_Off ofs = 0; \
188 for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) { \
189 struct elf_phdr phdr = vsyscall_phdrs[i]; \
190 if (phdr.p_type == PT_LOAD) { \
191 BUG_ON(ofs != 0); \
192 ofs = phdr.p_offset = offset; \
193 phdr.p_memsz = PAGE_ALIGN(phdr.p_memsz); \
194 phdr.p_filesz = phdr.p_memsz; \
195 offset += phdr.p_filesz; \
196 } \
197 else \
198 phdr.p_offset += ofs; \
199 phdr.p_paddr = 0; /* match other core phdrs */ \
200 DUMP_WRITE(&phdr, sizeof(phdr)); \
201 } \
202 } while (0)
203 #define ELF_CORE_WRITE_EXTRA_DATA \
204 do { \
205 const struct elf_phdr *const vsyscall_phdrs = \
206 (const struct elf_phdr *) (VDSO_HIGH_BASE \
207 + VDSO_HIGH_EHDR->e_phoff); \
208 int i; \
209 for (i = 0; i < VDSO_HIGH_EHDR->e_phnum; ++i) { \
210 if (vsyscall_phdrs[i].p_type == PT_LOAD) \
211 DUMP_WRITE((void *) vsyscall_phdrs[i].p_vaddr, \
212 PAGE_ALIGN(vsyscall_phdrs[i].p_memsz)); \
213 } \
214 } while (0)
216 #endif
218 #endif