diff options
author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-03-08 23:17:32 -0800 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-03-08 23:17:32 -0800 |
commit | ce67eef6a112bb283c6db39f9195800f31f5599a (patch) | |
tree | 34f2e7fbd0b9838abba482dbb1a7db09e6fbb53c /arch/ia64/ia32/binfmt_elf32.c | |
parent | 776943fd6f104a6e8457dc95a17282e69e963666 (diff) | |
parent | 57d54889cd00db2752994b389ba714138652e60c (diff) |
Merge commit 'v2.6.34-rc1' into for-linus
Diffstat (limited to 'arch/ia64/ia32/binfmt_elf32.c')
-rw-r--r-- | arch/ia64/ia32/binfmt_elf32.c | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/arch/ia64/ia32/binfmt_elf32.c b/arch/ia64/ia32/binfmt_elf32.c deleted file mode 100644 index c69552bf893..00000000000 --- a/arch/ia64/ia32/binfmt_elf32.c +++ /dev/null @@ -1,245 +0,0 @@ -/* - * IA-32 ELF support. - * - * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> - * Copyright (C) 2001 Hewlett-Packard Co - * David Mosberger-Tang <davidm@hpl.hp.com> - * - * 06/16/00 A. Mallick initialize csd/ssd/tssd/cflg for ia32_load_state - * 04/13/01 D. Mosberger dropped saving tssd in ar.k1---it's not needed - * 09/14/01 D. Mosberger fixed memory management for gdt/tss page - */ - -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/security.h> - -#include <asm/param.h> -#include <asm/signal.h> - -#include "ia32priv.h" -#include "elfcore32.h" - -/* Override some function names */ -#undef start_thread -#define start_thread ia32_start_thread -#define elf_format elf32_format -#define init_elf_binfmt init_elf32_binfmt -#define exit_elf_binfmt exit_elf32_binfmt - -#undef CLOCKS_PER_SEC -#define CLOCKS_PER_SEC IA32_CLOCKS_PER_SEC - -extern void ia64_elf32_init (struct pt_regs *regs); - -static void elf32_set_personality (void); - -static unsigned long __attribute ((unused)) -randomize_stack_top(unsigned long stack_top); - -#define setup_arg_pages(bprm,tos,exec) ia32_setup_arg_pages(bprm,exec) -#define elf_map elf32_map - -#undef SET_PERSONALITY -#define SET_PERSONALITY(ex) elf32_set_personality() - -#define elf_read_implies_exec(ex, have_pt_gnu_stack) (!(have_pt_gnu_stack)) - -/* Ugly but avoids duplication */ -#include "../../../fs/binfmt_elf.c" - -extern struct page *ia32_shared_page[]; -extern unsigned long *ia32_gdt; -extern struct page *ia32_gate_page; - -int -ia32_install_shared_page (struct vm_area_struct *vma, struct vm_fault *vmf) -{ - vmf->page = ia32_shared_page[smp_processor_id()]; - get_page(vmf->page); - return 0; -} - -int -ia32_install_gate_page (struct vm_area_struct *vma, struct vm_fault *vmf) -{ - vmf->page = ia32_gate_page; - get_page(vmf->page); - return 0; -} - - -static const struct vm_operations_struct ia32_shared_page_vm_ops = { - .fault = ia32_install_shared_page -}; - -static const struct vm_operations_struct ia32_gate_page_vm_ops = { - .fault = ia32_install_gate_page -}; - -void -ia64_elf32_init (struct pt_regs *regs) -{ - struct vm_area_struct *vma; - - /* - * Map GDT below 4GB, where the processor can find it. We need to map - * it with privilege level 3 because the IVE uses non-privileged accesses to these - * tables. IA-32 segmentation is used to protect against IA-32 accesses to them. - */ - vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL); - if (vma) { - vma->vm_mm = current->mm; - vma->vm_start = IA32_GDT_OFFSET; - vma->vm_end = vma->vm_start + PAGE_SIZE; - vma->vm_page_prot = PAGE_SHARED; - vma->vm_flags = VM_READ|VM_MAYREAD|VM_RESERVED; - vma->vm_ops = &ia32_shared_page_vm_ops; - down_write(¤t->mm->mmap_sem); - { - if (insert_vm_struct(current->mm, vma)) { - kmem_cache_free(vm_area_cachep, vma); - up_write(¤t->mm->mmap_sem); - BUG(); - } - } - up_write(¤t->mm->mmap_sem); - } - - /* - * When user stack is not executable, push sigreturn code to stack makes - * segmentation fault raised when returning to kernel. So now sigreturn - * code is locked in specific gate page, which is pointed by pretcode - * when setup_frame_ia32 - */ - vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL); - if (vma) { - vma->vm_mm = current->mm; - vma->vm_start = IA32_GATE_OFFSET; - vma->vm_end = vma->vm_start + PAGE_SIZE; - vma->vm_page_prot = PAGE_COPY_EXEC; - vma->vm_flags = VM_READ | VM_MAYREAD | VM_EXEC - | VM_MAYEXEC | VM_RESERVED; - vma->vm_ops = &ia32_gate_page_vm_ops; - down_write(¤t->mm->mmap_sem); - { - if (insert_vm_struct(current->mm, vma)) { - kmem_cache_free(vm_area_cachep, vma); - up_write(¤t->mm->mmap_sem); - BUG(); - } - } - up_write(¤t->mm->mmap_sem); - } - - /* - * Install LDT as anonymous memory. This gives us all-zero segment descriptors - * until a task modifies them via modify_ldt(). - */ - vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL); - if (vma) { - vma->vm_mm = current->mm; - vma->vm_start = IA32_LDT_OFFSET; - vma->vm_end = vma->vm_start + PAGE_ALIGN(IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE); - vma->vm_page_prot = PAGE_SHARED; - vma->vm_flags = VM_READ|VM_WRITE|VM_MAYREAD|VM_MAYWRITE; - down_write(¤t->mm->mmap_sem); - { - if (insert_vm_struct(current->mm, vma)) { - kmem_cache_free(vm_area_cachep, vma); - up_write(¤t->mm->mmap_sem); - BUG(); - } - } - up_write(¤t->mm->mmap_sem); - } - - ia64_psr(regs)->ac = 0; /* turn off alignment checking */ - regs->loadrs = 0; - /* - * According to the ABI %edx points to an `atexit' handler. Since we don't have - * one we'll set it to 0 and initialize all the other registers just to make - * things more deterministic, ala the i386 implementation. - */ - regs->r8 = 0; /* %eax */ - regs->r11 = 0; /* %ebx */ - regs->r9 = 0; /* %ecx */ - regs->r10 = 0; /* %edx */ - regs->r13 = 0; /* %ebp */ - regs->r14 = 0; /* %esi */ - regs->r15 = 0; /* %edi */ - - current->thread.eflag = IA32_EFLAG; - current->thread.fsr = IA32_FSR_DEFAULT; - current->thread.fcr = IA32_FCR_DEFAULT; - current->thread.fir = 0; - current->thread.fdr = 0; - - /* - * Setup GDTD. Note: GDTD is the descrambled version of the pseudo-descriptor - * format defined by Figure 3-11 "Pseudo-Descriptor Format" in the IA-32 - * architecture manual. Also note that the only fields that are not ignored are - * `base', `limit', 'G', `P' (must be 1) and `S' (must be 0). - */ - regs->r31 = IA32_SEG_UNSCRAMBLE(IA32_SEG_DESCRIPTOR(IA32_GDT_OFFSET, IA32_PAGE_SIZE - 1, - 0, 0, 0, 1, 0, 0, 0)); - /* Setup the segment selectors */ - regs->r16 = (__USER_DS << 16) | __USER_DS; /* ES == DS, GS, FS are zero */ - regs->r17 = (__USER_DS << 16) | __USER_CS; /* SS, CS; ia32_load_state() sets TSS and LDT */ - - ia32_load_segment_descriptors(current); - ia32_load_state(current); -} - -/* - * Undo the override of setup_arg_pages() without this ia32_setup_arg_pages() - * will suffer infinite self recursion. - */ -#undef setup_arg_pages - -int -ia32_setup_arg_pages (struct linux_binprm *bprm, int executable_stack) -{ - int ret; - - ret = setup_arg_pages(bprm, IA32_STACK_TOP, executable_stack); - if (!ret) { - /* - * Can't do it in ia64_elf32_init(). Needs to be done before - * calls to elf32_map() - */ - current->thread.ppl = ia32_init_pp_list(); - } - - return ret; -} - -static void -elf32_set_personality (void) -{ - set_personality(PER_LINUX32); - current->thread.map_base = IA32_PAGE_OFFSET/3; -} - -static unsigned long -elf32_map(struct file *filep, unsigned long addr, struct elf_phdr *eppnt, - int prot, int type, unsigned long unused) -{ - unsigned long pgoff = (eppnt->p_vaddr) & ~IA32_PAGE_MASK; - - return ia32_do_mmap(filep, (addr & IA32_PAGE_MASK), eppnt->p_filesz + pgoff, prot, type, - eppnt->p_offset - pgoff); -} - -#define cpu_uses_ia32el() (local_cpu_data->family > 0x1f) - -static int __init check_elf32_binfmt(void) -{ - if (cpu_uses_ia32el()) { - printk("Please use IA-32 EL for executing IA-32 binaries\n"); - unregister_binfmt(&elf_format); - } - return 0; -} - -module_init(check_elf32_binfmt) |