x86 vDSO: ia32 vsyscall removal
This removes all the old vsyscall code from arch/x86/ia32/ that is no longer used because arch/x86/vdso/ code has replaced it. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Roland McGrath
committed by
Ingo Molnar
Ingo Molnar
parent
af65d64845
commit
16f4bc738d
@@ -117,9 +117,6 @@ install: vdso_install
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$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
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$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
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vdso_install:
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vdso_install:
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ifeq ($(CONFIG_IA32_EMULATION),y)
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$(Q)$(MAKE) $(build)=arch/x86/ia32 $@
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endif
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$(Q)$(MAKE) $(build)=arch/x86/vdso $@
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$(Q)$(MAKE) $(build)=arch/x86/vdso $@
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archclean:
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archclean:
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@@ -12,40 +12,3 @@ obj-$(CONFIG_IA32_AOUT) += ia32_aout.o
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audit-class-$(CONFIG_AUDIT) := audit.o
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audit-class-$(CONFIG_AUDIT) := audit.o
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obj-$(CONFIG_IA32_EMULATION) += $(audit-class-y)
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obj-$(CONFIG_IA32_EMULATION) += $(audit-class-y)
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$(obj)/syscall32_syscall.o: \
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$(foreach F,sysenter syscall,$(obj)/vsyscall-$F.so)
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# Teach kbuild about targets
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targets := $(foreach F,$(addprefix vsyscall-,sysenter syscall),\
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$F.o $F.so $F.so.dbg)
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# The DSO images are built using a special linker script
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quiet_cmd_syscall = SYSCALL $@
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cmd_syscall = $(CC) -m32 -nostdlib -shared \
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$(call ld-option, -Wl$(comma)--hash-style=sysv) \
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-Wl,-soname=linux-gate.so.1 -o $@ \
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-Wl,-T,$(filter-out FORCE,$^)
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$(obj)/%.so: OBJCOPYFLAGS := -S
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$(obj)/%.so: $(obj)/%.so.dbg FORCE
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$(call if_changed,objcopy)
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$(obj)/vsyscall-sysenter.so.dbg $(obj)/vsyscall-syscall.so.dbg: \
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$(obj)/vsyscall-%.so.dbg: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
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$(call if_changed,syscall)
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AFLAGS_vsyscall-sysenter.o = -m32 -Wa,-32
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AFLAGS_vsyscall-syscall.o = -m32 -Wa,-32
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vdsos := vdso32-sysenter.so vdso32-syscall.so
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quiet_cmd_vdso_install = INSTALL $@
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cmd_vdso_install = cp $(@:vdso32-%.so=$(obj)/vsyscall-%.so.dbg) \
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$(MODLIB)/vdso/$@
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$(vdsos):
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@mkdir -p $(MODLIB)/vdso
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$(call cmd,vdso_install)
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vdso_install: $(vdsos)
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@@ -1,90 +0,0 @@
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/*
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* Copyright 2002,2003 Andi Kleen, SuSE Labs
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*
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* vsyscall handling for 32bit processes. Map a stub page into it on
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* demand because 32bit cannot reach the kernel's fixmaps
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*/
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/gfp.h>
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#include <linux/init.h>
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#include <linux/stringify.h>
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#include <linux/security.h>
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#include <asm/proto.h>
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#include <asm/tlbflush.h>
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#include <asm/ia32_unistd.h>
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#include <asm/vsyscall32.h>
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extern unsigned char syscall32_syscall[], syscall32_syscall_end[];
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extern unsigned char syscall32_sysenter[], syscall32_sysenter_end[];
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extern int sysctl_vsyscall32;
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static struct page *syscall32_pages[1];
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static int use_sysenter = -1;
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struct linux_binprm;
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/* Setup a VMA at program startup for the vsyscall page */
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int syscall32_setup_pages(struct linux_binprm *bprm, int exstack)
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{
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struct mm_struct *mm = current->mm;
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int ret;
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down_write(&mm->mmap_sem);
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/*
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* MAYWRITE to allow gdb to COW and set breakpoints
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*
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* Make sure the vDSO gets into every core dump.
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* Dumping its contents makes post-mortem fully interpretable later
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* without matching up the same kernel and hardware config to see
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* what PC values meant.
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*/
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/* Could randomize here */
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ret = install_special_mapping(mm, VSYSCALL32_BASE, PAGE_SIZE,
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VM_READ|VM_EXEC|
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VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
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VM_ALWAYSDUMP,
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syscall32_pages);
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if (ret == 0) {
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current->mm->context.vdso = (void __user *)VSYSCALL32_BASE;
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current_thread_info()->sysenter_return = VSYSCALL32_SYSEXIT;
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}
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up_write(&mm->mmap_sem);
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return ret;
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}
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static int __init init_syscall32(void)
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{
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char *syscall32_page = (void *)get_zeroed_page(GFP_KERNEL);
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if (!syscall32_page)
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panic("Cannot allocate syscall32 page");
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syscall32_pages[0] = virt_to_page(syscall32_page);
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if (use_sysenter > 0) {
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memcpy(syscall32_page, syscall32_sysenter,
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syscall32_sysenter_end - syscall32_sysenter);
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} else {
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memcpy(syscall32_page, syscall32_syscall,
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syscall32_syscall_end - syscall32_syscall);
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}
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return 0;
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}
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__initcall(init_syscall32);
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/* May not be __init: called during resume */
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void syscall32_cpu_init(void)
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{
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if (use_sysenter < 0)
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use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL);
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/*
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* Load these always in case some future AMD CPU supports
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* SYSENTER from compat mode too.
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*/
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checking_wrmsrl(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS);
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checking_wrmsrl(MSR_IA32_SYSENTER_ESP, 0ULL);
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checking_wrmsrl(MSR_IA32_SYSENTER_EIP, (u64)ia32_sysenter_target);
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wrmsrl(MSR_CSTAR, ia32_cstar_target);
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}
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@@ -1,17 +0,0 @@
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/* 32bit VDSOs mapped into user space. */
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.section ".init.data","aw"
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.globl syscall32_syscall
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.globl syscall32_syscall_end
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syscall32_syscall:
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.incbin "arch/x86/ia32/vsyscall-syscall.so"
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syscall32_syscall_end:
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.globl syscall32_sysenter
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.globl syscall32_sysenter_end
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syscall32_sysenter:
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.incbin "arch/x86/ia32/vsyscall-sysenter.so"
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syscall32_sysenter_end:
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@@ -1,142 +0,0 @@
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/*
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* Common code for the sigreturn entry points on the vsyscall page.
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* This code uses SYSCALL_ENTER_KERNEL (either syscall or int $0x80)
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* to enter the kernel.
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* This file is #include'd by vsyscall-*.S to define them after the
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* vsyscall entry point. The addresses we get for these entry points
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* by doing ".balign 32" must match in both versions of the page.
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*/
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.code32
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.section .text.sigreturn,"ax"
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.balign 32
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.globl __kernel_sigreturn
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.type __kernel_sigreturn,@function
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__kernel_sigreturn:
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.LSTART_sigreturn:
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popl %eax
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movl $__NR_ia32_sigreturn, %eax
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SYSCALL_ENTER_KERNEL
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.LEND_sigreturn:
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.size __kernel_sigreturn,.-.LSTART_sigreturn
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.section .text.rtsigreturn,"ax"
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.balign 32
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.globl __kernel_rt_sigreturn
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.type __kernel_rt_sigreturn,@function
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__kernel_rt_sigreturn:
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.LSTART_rt_sigreturn:
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movl $__NR_ia32_rt_sigreturn, %eax
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SYSCALL_ENTER_KERNEL
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.LEND_rt_sigreturn:
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.size __kernel_rt_sigreturn,.-.LSTART_rt_sigreturn
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.section .eh_frame,"a",@progbits
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.LSTARTFRAMES:
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.long .LENDCIES-.LSTARTCIES
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.LSTARTCIES:
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.long 0 /* CIE ID */
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.byte 1 /* Version number */
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.string "zRS" /* NUL-terminated augmentation string */
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.uleb128 1 /* Code alignment factor */
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.sleb128 -4 /* Data alignment factor */
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.byte 8 /* Return address register column */
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.uleb128 1 /* Augmentation value length */
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.byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
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.byte 0x0c /* DW_CFA_def_cfa */
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.uleb128 4
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.uleb128 4
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.byte 0x88 /* DW_CFA_offset, column 0x8 */
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.uleb128 1
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.align 4
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.LENDCIES:
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.long .LENDFDE2-.LSTARTFDE2 /* Length FDE */
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.LSTARTFDE2:
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.long .LSTARTFDE2-.LSTARTFRAMES /* CIE pointer */
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/* HACK: The dwarf2 unwind routines will subtract 1 from the
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return address to get an address in the middle of the
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presumed call instruction. Since we didn't get here via
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a call, we need to include the nop before the real start
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to make up for it. */
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.long .LSTART_sigreturn-1-. /* PC-relative start address */
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.long .LEND_sigreturn-.LSTART_sigreturn+1
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.uleb128 0 /* Augmentation length */
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/* What follows are the instructions for the table generation.
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We record the locations of each register saved. This is
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complicated by the fact that the "CFA" is always assumed to
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be the value of the stack pointer in the caller. This means
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that we must define the CFA of this body of code to be the
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saved value of the stack pointer in the sigcontext. Which
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also means that there is no fixed relation to the other
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saved registers, which means that we must use DW_CFA_expression
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to compute their addresses. It also means that when we
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adjust the stack with the popl, we have to do it all over again. */
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#define do_cfa_expr(offset) \
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.byte 0x0f; /* DW_CFA_def_cfa_expression */ \
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.uleb128 1f-0f; /* length */ \
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0: .byte 0x74; /* DW_OP_breg4 */ \
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.sleb128 offset; /* offset */ \
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.byte 0x06; /* DW_OP_deref */ \
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1:
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#define do_expr(regno, offset) \
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.byte 0x10; /* DW_CFA_expression */ \
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.uleb128 regno; /* regno */ \
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.uleb128 1f-0f; /* length */ \
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0: .byte 0x74; /* DW_OP_breg4 */ \
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.sleb128 offset; /* offset */ \
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1:
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do_cfa_expr(IA32_SIGCONTEXT_esp+4)
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do_expr(0, IA32_SIGCONTEXT_eax+4)
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do_expr(1, IA32_SIGCONTEXT_ecx+4)
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do_expr(2, IA32_SIGCONTEXT_edx+4)
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do_expr(3, IA32_SIGCONTEXT_ebx+4)
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do_expr(5, IA32_SIGCONTEXT_ebp+4)
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do_expr(6, IA32_SIGCONTEXT_esi+4)
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do_expr(7, IA32_SIGCONTEXT_edi+4)
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do_expr(8, IA32_SIGCONTEXT_eip+4)
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.byte 0x42 /* DW_CFA_advance_loc 2 -- nop; popl eax. */
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do_cfa_expr(IA32_SIGCONTEXT_esp)
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do_expr(0, IA32_SIGCONTEXT_eax)
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do_expr(1, IA32_SIGCONTEXT_ecx)
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do_expr(2, IA32_SIGCONTEXT_edx)
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do_expr(3, IA32_SIGCONTEXT_ebx)
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do_expr(5, IA32_SIGCONTEXT_ebp)
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do_expr(6, IA32_SIGCONTEXT_esi)
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do_expr(7, IA32_SIGCONTEXT_edi)
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do_expr(8, IA32_SIGCONTEXT_eip)
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.align 4
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.LENDFDE2:
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.long .LENDFDE3-.LSTARTFDE3 /* Length FDE */
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.LSTARTFDE3:
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.long .LSTARTFDE3-.LSTARTFRAMES /* CIE pointer */
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/* HACK: See above wrt unwind library assumptions. */
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.long .LSTART_rt_sigreturn-1-. /* PC-relative start address */
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.long .LEND_rt_sigreturn-.LSTART_rt_sigreturn+1
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.uleb128 0 /* Augmentation */
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/* What follows are the instructions for the table generation.
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We record the locations of each register saved. This is
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slightly less complicated than the above, since we don't
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modify the stack pointer in the process. */
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do_cfa_expr(IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esp)
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do_expr(0, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eax)
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do_expr(1, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ecx)
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do_expr(2, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edx)
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do_expr(3, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebx)
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do_expr(5, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebp)
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do_expr(6, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esi)
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do_expr(7, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edi)
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do_expr(8, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eip)
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.align 4
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.LENDFDE3:
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#include "../vdso/vdso32/note.S"
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@@ -1,69 +0,0 @@
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/*
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* Code for the vsyscall page. This version uses the syscall instruction.
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*/
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#include <asm/ia32_unistd.h>
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#include <asm/asm-offsets.h>
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#include <asm/segment.h>
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.code32
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.text
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.section .text.vsyscall,"ax"
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.globl __kernel_vsyscall
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.type __kernel_vsyscall,@function
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__kernel_vsyscall:
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.LSTART_vsyscall:
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push %ebp
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.Lpush_ebp:
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movl %ecx, %ebp
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syscall
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movl $__USER32_DS, %ecx
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movl %ecx, %ss
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movl %ebp, %ecx
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popl %ebp
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.Lpop_ebp:
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ret
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.LEND_vsyscall:
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.size __kernel_vsyscall,.-.LSTART_vsyscall
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.section .eh_frame,"a",@progbits
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.LSTARTFRAME:
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.long .LENDCIE-.LSTARTCIE
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.LSTARTCIE:
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.long 0 /* CIE ID */
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.byte 1 /* Version number */
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.string "zR" /* NUL-terminated augmentation string */
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.uleb128 1 /* Code alignment factor */
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.sleb128 -4 /* Data alignment factor */
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|
||||||
.byte 8 /* Return address register column */
|
|
||||||
.uleb128 1 /* Augmentation value length */
|
|
||||||
.byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
|
|
||||||
.byte 0x0c /* DW_CFA_def_cfa */
|
|
||||||
.uleb128 4
|
|
||||||
.uleb128 4
|
|
||||||
.byte 0x88 /* DW_CFA_offset, column 0x8 */
|
|
||||||
.uleb128 1
|
|
||||||
.align 4
|
|
||||||
.LENDCIE:
|
|
||||||
|
|
||||||
.long .LENDFDE1-.LSTARTFDE1 /* Length FDE */
|
|
||||||
.LSTARTFDE1:
|
|
||||||
.long .LSTARTFDE1-.LSTARTFRAME /* CIE pointer */
|
|
||||||
.long .LSTART_vsyscall-. /* PC-relative start address */
|
|
||||||
.long .LEND_vsyscall-.LSTART_vsyscall
|
|
||||||
.uleb128 0 /* Augmentation length */
|
|
||||||
/* What follows are the instructions for the table generation.
|
|
||||||
We have to record all changes of the stack pointer. */
|
|
||||||
.byte 0x40 + .Lpush_ebp-.LSTART_vsyscall /* DW_CFA_advance_loc */
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.uleb128 8
|
|
||||||
.byte 0x85, 0x02 /* DW_CFA_offset %ebp -8 */
|
|
||||||
.byte 0x40 + .Lpop_ebp-.Lpush_ebp /* DW_CFA_advance_loc */
|
|
||||||
.byte 0xc5 /* DW_CFA_restore %ebp */
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.uleb128 4
|
|
||||||
.align 4
|
|
||||||
.LENDFDE1:
|
|
||||||
|
|
||||||
#define SYSCALL_ENTER_KERNEL syscall
|
|
||||||
#include "vsyscall-sigreturn.S"
|
|
||||||
@@ -1,95 +0,0 @@
|
|||||||
/*
|
|
||||||
* Code for the vsyscall page. This version uses the sysenter instruction.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <asm/ia32_unistd.h>
|
|
||||||
#include <asm/asm-offsets.h>
|
|
||||||
|
|
||||||
.code32
|
|
||||||
.text
|
|
||||||
.section .text.vsyscall,"ax"
|
|
||||||
.globl __kernel_vsyscall
|
|
||||||
.type __kernel_vsyscall,@function
|
|
||||||
__kernel_vsyscall:
|
|
||||||
.LSTART_vsyscall:
|
|
||||||
push %ecx
|
|
||||||
.Lpush_ecx:
|
|
||||||
push %edx
|
|
||||||
.Lpush_edx:
|
|
||||||
push %ebp
|
|
||||||
.Lenter_kernel:
|
|
||||||
movl %esp,%ebp
|
|
||||||
sysenter
|
|
||||||
.space 7,0x90
|
|
||||||
jmp .Lenter_kernel
|
|
||||||
/* 16: System call normal return point is here! */
|
|
||||||
pop %ebp
|
|
||||||
.Lpop_ebp:
|
|
||||||
pop %edx
|
|
||||||
.Lpop_edx:
|
|
||||||
pop %ecx
|
|
||||||
.Lpop_ecx:
|
|
||||||
ret
|
|
||||||
.LEND_vsyscall:
|
|
||||||
.size __kernel_vsyscall,.-.LSTART_vsyscall
|
|
||||||
|
|
||||||
.section .eh_frame,"a",@progbits
|
|
||||||
.LSTARTFRAME:
|
|
||||||
.long .LENDCIE-.LSTARTCIE
|
|
||||||
.LSTARTCIE:
|
|
||||||
.long 0 /* CIE ID */
|
|
||||||
.byte 1 /* Version number */
|
|
||||||
.string "zR" /* NUL-terminated augmentation string */
|
|
||||||
.uleb128 1 /* Code alignment factor */
|
|
||||||
.sleb128 -4 /* Data alignment factor */
|
|
||||||
.byte 8 /* Return address register column */
|
|
||||||
.uleb128 1 /* Augmentation value length */
|
|
||||||
.byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
|
|
||||||
.byte 0x0c /* DW_CFA_def_cfa */
|
|
||||||
.uleb128 4
|
|
||||||
.uleb128 4
|
|
||||||
.byte 0x88 /* DW_CFA_offset, column 0x8 */
|
|
||||||
.uleb128 1
|
|
||||||
.align 4
|
|
||||||
.LENDCIE:
|
|
||||||
|
|
||||||
.long .LENDFDE1-.LSTARTFDE1 /* Length FDE */
|
|
||||||
.LSTARTFDE1:
|
|
||||||
.long .LSTARTFDE1-.LSTARTFRAME /* CIE pointer */
|
|
||||||
.long .LSTART_vsyscall-. /* PC-relative start address */
|
|
||||||
.long .LEND_vsyscall-.LSTART_vsyscall
|
|
||||||
.uleb128 0 /* Augmentation length */
|
|
||||||
/* What follows are the instructions for the table generation.
|
|
||||||
We have to record all changes of the stack pointer. */
|
|
||||||
.byte 0x04 /* DW_CFA_advance_loc4 */
|
|
||||||
.long .Lpush_ecx-.LSTART_vsyscall
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.byte 0x08 /* RA at offset 8 now */
|
|
||||||
.byte 0x04 /* DW_CFA_advance_loc4 */
|
|
||||||
.long .Lpush_edx-.Lpush_ecx
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.byte 0x0c /* RA at offset 12 now */
|
|
||||||
.byte 0x04 /* DW_CFA_advance_loc4 */
|
|
||||||
.long .Lenter_kernel-.Lpush_edx
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.byte 0x10 /* RA at offset 16 now */
|
|
||||||
.byte 0x85, 0x04 /* DW_CFA_offset %ebp -16 */
|
|
||||||
/* Finally the epilogue. */
|
|
||||||
.byte 0x04 /* DW_CFA_advance_loc4 */
|
|
||||||
.long .Lpop_ebp-.Lenter_kernel
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.byte 0x12 /* RA at offset 12 now */
|
|
||||||
.byte 0xc5 /* DW_CFA_restore %ebp */
|
|
||||||
.byte 0x04 /* DW_CFA_advance_loc4 */
|
|
||||||
.long .Lpop_edx-.Lpop_ebp
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.byte 0x08 /* RA at offset 8 now */
|
|
||||||
.byte 0x04 /* DW_CFA_advance_loc4 */
|
|
||||||
.long .Lpop_ecx-.Lpop_edx
|
|
||||||
.byte 0x0e /* DW_CFA_def_cfa_offset */
|
|
||||||
.byte 0x04 /* RA at offset 4 now */
|
|
||||||
.align 4
|
|
||||||
.LENDFDE1:
|
|
||||||
|
|
||||||
#define SYSCALL_ENTER_KERNEL int $0x80
|
|
||||||
#include "vsyscall-sigreturn.S"
|
|
||||||
@@ -1,80 +0,0 @@
|
|||||||
/*
|
|
||||||
* Linker script for vsyscall DSO. The vsyscall page is an ELF shared
|
|
||||||
* object prelinked to its virtual address. This script controls its layout.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* This must match <asm/fixmap.h>. */
|
|
||||||
VSYSCALL_BASE = 0xffffe000;
|
|
||||||
|
|
||||||
SECTIONS
|
|
||||||
{
|
|
||||||
. = VSYSCALL_BASE + SIZEOF_HEADERS;
|
|
||||||
|
|
||||||
.hash : { *(.hash) } :text
|
|
||||||
.gnu.hash : { *(.gnu.hash) }
|
|
||||||
.dynsym : { *(.dynsym) }
|
|
||||||
.dynstr : { *(.dynstr) }
|
|
||||||
.gnu.version : { *(.gnu.version) }
|
|
||||||
.gnu.version_d : { *(.gnu.version_d) }
|
|
||||||
.gnu.version_r : { *(.gnu.version_r) }
|
|
||||||
|
|
||||||
/* This linker script is used both with -r and with -shared.
|
|
||||||
For the layouts to match, we need to skip more than enough
|
|
||||||
space for the dynamic symbol table et al. If this amount
|
|
||||||
is insufficient, ld -shared will barf. Just increase it here. */
|
|
||||||
. = VSYSCALL_BASE + 0x400;
|
|
||||||
|
|
||||||
.text.vsyscall : { *(.text.vsyscall) } :text =0x90909090
|
|
||||||
|
|
||||||
/* This is an 32bit object and we cannot easily get the offsets
|
|
||||||
into the 64bit kernel. Just hardcode them here. This assumes
|
|
||||||
that all the stubs don't need more than 0x100 bytes. */
|
|
||||||
. = VSYSCALL_BASE + 0x500;
|
|
||||||
|
|
||||||
.text.sigreturn : { *(.text.sigreturn) } :text =0x90909090
|
|
||||||
|
|
||||||
. = VSYSCALL_BASE + 0x600;
|
|
||||||
|
|
||||||
.text.rtsigreturn : { *(.text.rtsigreturn) } :text =0x90909090
|
|
||||||
|
|
||||||
.note : { *(.note.*) } :text :note
|
|
||||||
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
|
|
||||||
.eh_frame : { KEEP (*(.eh_frame)) } :text
|
|
||||||
.dynamic : { *(.dynamic) } :text :dynamic
|
|
||||||
.useless : {
|
|
||||||
*(.got.plt) *(.got)
|
|
||||||
*(.data .data.* .gnu.linkonce.d.*)
|
|
||||||
*(.dynbss)
|
|
||||||
*(.bss .bss.* .gnu.linkonce.b.*)
|
|
||||||
} :text
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* We must supply the ELF program headers explicitly to get just one
|
|
||||||
* PT_LOAD segment, and set the flags explicitly to make segments read-only.
|
|
||||||
*/
|
|
||||||
PHDRS
|
|
||||||
{
|
|
||||||
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
|
|
||||||
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
|
|
||||||
note PT_NOTE FLAGS(4); /* PF_R */
|
|
||||||
eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* This controls what symbols we export from the DSO.
|
|
||||||
*/
|
|
||||||
VERSION
|
|
||||||
{
|
|
||||||
LINUX_2.5 {
|
|
||||||
global:
|
|
||||||
__kernel_vsyscall;
|
|
||||||
__kernel_sigreturn;
|
|
||||||
__kernel_rt_sigreturn;
|
|
||||||
|
|
||||||
local: *;
|
|
||||||
};
|
|
||||||
}
|
|
||||||
|
|
||||||
/* The ELF entry point can be used to set the AT_SYSINFO value. */
|
|
||||||
ENTRY(__kernel_vsyscall);
|
|
||||||
@@ -9,7 +9,6 @@ header-y += prctl.h
|
|||||||
header-y += ptrace-abi.h
|
header-y += ptrace-abi.h
|
||||||
header-y += sigcontext32.h
|
header-y += sigcontext32.h
|
||||||
header-y += ucontext.h
|
header-y += ucontext.h
|
||||||
header-y += vsyscall32.h
|
|
||||||
|
|
||||||
unifdef-y += e820.h
|
unifdef-y += e820.h
|
||||||
unifdef-y += ist.h
|
unifdef-y += ist.h
|
||||||
|
|||||||
@@ -1,20 +0,0 @@
|
|||||||
#ifndef _ASM_VSYSCALL32_H
|
|
||||||
#define _ASM_VSYSCALL32_H 1
|
|
||||||
|
|
||||||
/* Values need to match arch/x86_64/ia32/vsyscall.lds */
|
|
||||||
|
|
||||||
#ifdef __ASSEMBLY__
|
|
||||||
#define VSYSCALL32_BASE 0xffffe000
|
|
||||||
#define VSYSCALL32_SYSEXIT (VSYSCALL32_BASE + 0x410)
|
|
||||||
#else
|
|
||||||
#define VSYSCALL32_BASE 0xffffe000UL
|
|
||||||
#define VSYSCALL32_END (VSYSCALL32_BASE + PAGE_SIZE)
|
|
||||||
#define VSYSCALL32_EHDR ((const struct elf32_hdr *) VSYSCALL32_BASE)
|
|
||||||
|
|
||||||
#define VSYSCALL32_VSYSCALL ((void *)VSYSCALL32_BASE + 0x400)
|
|
||||||
#define VSYSCALL32_SYSEXIT ((void *)VSYSCALL32_BASE + 0x410)
|
|
||||||
#define VSYSCALL32_SIGRETURN ((void __user *)VSYSCALL32_BASE + 0x500)
|
|
||||||
#define VSYSCALL32_RTSIGRETURN ((void __user *)VSYSCALL32_BASE + 0x600)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#endif
|
|
||||||
Reference in New Issue
Block a user