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authorRoland McGrath <roland@redhat.com>2008-01-30 13:30:42 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:30:42 +0100
commit6c3652efcafa6a6d795093362cb4290c84994b5c (patch)
tree1587379f45a7145a64c3103b40e12b01c46ea559 /arch/x86/kernel
parent0249c9c1e7505c2b020bcc6deaf1e0415de9943e (diff)
x86 vDSO: i386 vdso32
This makes the i386 kernel use the new vDSO build in arch/x86/vdso/vdso32/ to replace the old one from arch/x86/kernel/. 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>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/Makefile_3243
-rw-r--r--arch/x86/kernel/asm-offsets_32.c2
-rw-r--r--arch/x86/kernel/signal_32.c5
-rw-r--r--arch/x86/kernel/sysenter_32.c6
-rw-r--r--arch/x86/kernel/vsyscall_32.S15
-rw-r--r--arch/x86/kernel/vsyscall_32.lds.S67
6 files changed, 6 insertions, 132 deletions
diff --git a/arch/x86/kernel/Makefile_32 b/arch/x86/kernel/Makefile_32
index f7c1c1c88dd..0eef8226753 100644
--- a/arch/x86/kernel/Makefile_32
+++ b/arch/x86/kernel/Makefile_32
@@ -33,7 +33,7 @@ obj-$(CONFIG_X86_NUMAQ) += numaq_32.o
obj-$(CONFIG_X86_SUMMIT_NUMA) += summit_32.o
obj-$(CONFIG_KPROBES) += kprobes_32.o
obj-$(CONFIG_MODULES) += module_32.o
-obj-y += sysenter_32.o vsyscall_32.o
+obj-y += sysenter_32.o
obj-$(CONFIG_ACPI_SRAT) += srat_32.o
obj-$(CONFIG_EFI) += efi_32.o efi_stub_32.o
obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o
@@ -48,44 +48,3 @@ obj-$(CONFIG_PARAVIRT) += paravirt_32.o
obj-y += pcspeaker.o
obj-$(CONFIG_SCx200) += scx200_32.o
-
-# vsyscall_32.o contains the vsyscall DSO images as __initdata.
-# We must build both images before we can assemble it.
-# Note: kbuild does not track this dependency due to usage of .incbin
-$(obj)/vsyscall_32.o: $(obj)/vsyscall-int80_32.so $(obj)/vsyscall-sysenter_32.so
-targets += $(foreach F,int80 sysenter,vsyscall-$F_32.o vsyscall-$F_32.so)
-targets += vsyscall-note_32.o vsyscall_32.lds
-
-$(obj)/vsyscall-%_32.o: $(src)/../vdso/vdso32/%.S
- $(call if_changed_dep,as_o_S)
-
-# The DSO images are built using a special linker script.
-quiet_cmd_syscall = SYSCALL $@
- cmd_syscall = $(CC) -m elf_i386 -nostdlib $(SYSCFLAGS_$(@F)) \
- -Wl,-T,$(filter-out FORCE,$^) -o $@
-
-export CPPFLAGS_vsyscall_32.lds += -P -C -Ui386
-
-vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \
- $(call ld-option, -Wl$(comma)--hash-style=sysv)
-SYSCFLAGS_vsyscall-sysenter_32.so = $(vsyscall-flags)
-SYSCFLAGS_vsyscall-int80_32.so = $(vsyscall-flags)
-
-$(obj)/vsyscall-int80_32.so $(obj)/vsyscall-sysenter_32.so: \
-$(obj)/vsyscall-%.so: $(src)/vsyscall_32.lds \
- $(obj)/vsyscall-%.o $(obj)/vsyscall-note_32.o FORCE
- $(call if_changed,syscall)
-
-# We also create a special relocatable object that should mirror the symbol
-# table and layout of the linked DSO. With ld -R we can then refer to
-# these symbols in the kernel code rather than hand-coded addresses.
-extra-y += vsyscall-syms.o
-$(obj)/built-in.o: $(obj)/vsyscall-syms.o
-$(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o
-
-SYSCFLAGS_vsyscall-syms.o = -r
-$(obj)/vsyscall-syms.o: $(src)/vsyscall_32.lds \
- $(obj)/vsyscall-sysenter_32.o $(obj)/vsyscall-note_32.o FORCE
- $(call if_changed,syscall)
-
-
diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c
index 4f750ec810f..fd7464d2333 100644
--- a/arch/x86/kernel/asm-offsets_32.c
+++ b/arch/x86/kernel/asm-offsets_32.c
@@ -111,8 +111,6 @@ void foo(void)
DEFINE(PTRS_PER_PMD, PTRS_PER_PMD);
DEFINE(PTRS_PER_PGD, PTRS_PER_PGD);
- DEFINE(VDSO_PRELINK_asm, VDSO_PRELINK);
-
OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
#ifdef CONFIG_PARAVIRT
diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index 5c6170c44b0..1ac53e9a085 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -23,6 +23,7 @@
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/i387.h>
+#include <asm/vdso.h>
#include "sigframe_32.h"
#define DEBUG_SIG 0
@@ -362,7 +363,7 @@ static int setup_frame(int sig, struct k_sigaction *ka,
}
if (current->binfmt->hasvdso)
- restorer = (void *)VDSO_SYM(&__kernel_sigreturn);
+ restorer = VDSO32_SYMBOL(current->mm->context.vdso, sigreturn);
else
restorer = (void *)&frame->retcode;
if (ka->sa.sa_flags & SA_RESTORER)
@@ -459,7 +460,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
goto give_sigsegv;
/* Set up to return from userspace. */
- restorer = (void *)VDSO_SYM(&__kernel_rt_sigreturn);
+ restorer = VDSO32_SYMBOL(current->mm->context.vdso, rt_sigreturn);
if (ka->sa.sa_flags & SA_RESTORER)
restorer = ka->sa.sa_restorer;
err |= __put_user(restorer, &frame->pretcode);
diff --git a/arch/x86/kernel/sysenter_32.c b/arch/x86/kernel/sysenter_32.c
index 5a2d951e260..85c52d23ee4 100644
--- a/arch/x86/kernel/sysenter_32.c
+++ b/arch/x86/kernel/sysenter_32.c
@@ -23,6 +23,7 @@
#include <asm/unistd.h>
#include <asm/elf.h>
#include <asm/tlbflush.h>
+#include <asm/vdso.h>
enum {
VDSO_DISABLED = 0,
@@ -259,9 +260,6 @@ int __init sysenter_setup(void)
return 0;
}
-/* Defined in vsyscall-sysenter.S */
-extern void SYSENTER_RETURN;
-
/* Setup a VMA at program startup for the vsyscall page */
int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
{
@@ -308,7 +306,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
current->mm->context.vdso = (void *)addr;
current_thread_info()->sysenter_return =
- (void *)VDSO_SYM(&SYSENTER_RETURN);
+ VDSO32_SYMBOL(addr, SYSENTER_RETURN);
up_fail:
up_write(&mm->mmap_sem);
diff --git a/arch/x86/kernel/vsyscall_32.S b/arch/x86/kernel/vsyscall_32.S
deleted file mode 100644
index a5ab3dc4fd2..00000000000
--- a/arch/x86/kernel/vsyscall_32.S
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <linux/init.h>
-
-__INITDATA
-
- .globl vsyscall_int80_start, vsyscall_int80_end
-vsyscall_int80_start:
- .incbin "arch/x86/kernel/vsyscall-int80_32.so"
-vsyscall_int80_end:
-
- .globl vsyscall_sysenter_start, vsyscall_sysenter_end
-vsyscall_sysenter_start:
- .incbin "arch/x86/kernel/vsyscall-sysenter_32.so"
-vsyscall_sysenter_end:
-
-__FINIT
diff --git a/arch/x86/kernel/vsyscall_32.lds.S b/arch/x86/kernel/vsyscall_32.lds.S
deleted file mode 100644
index 4a8b0ed9b8f..00000000000
--- a/arch/x86/kernel/vsyscall_32.lds.S
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Linker script for vsyscall DSO. The vsyscall page is an ELF shared
- * object prelinked to its virtual address, and with only one read-only
- * segment (that fits in one page). This script controls its layout.
- */
-#include <asm/asm-offsets.h>
-
-SECTIONS
-{
- . = VDSO_PRELINK_asm + 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. */
- . = VDSO_PRELINK_asm + 0x400;
-
- .text : { *(.text) } :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);