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authorRoland McGrath <roland@redhat.com>2008-01-30 13:31:55 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:31:55 +0100
commita97f52e67890fda6b373c1c1895ff1c1c69b36c8 (patch)
tree3cf522fd85e30519eb8b202c6d4243395ccb8653 /arch/x86
parent60b3b9af35aad66345e395be911e46fb8443f0c5 (diff)
x86: compat_binfmt_elf
This switches x86-64's 32-bit ELF support to use the shared fs/compat_binfmt_elf.c code instead of our own ia32_binfmt.c. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/ia32/Makefile3
-rw-r--r--arch/x86/vdso/vdso32-setup.c33
3 files changed, 35 insertions, 2 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1992b8fe6a2..d89b9452815 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1532,6 +1532,7 @@ source "fs/Kconfig.binfmt"
config IA32_EMULATION
bool "IA32 Emulation"
depends on X86_64
+ select COMPAT_BINFMT_ELF
help
Include code to run 32-bit programs under a 64-bit kernel. You should
likely turn this on, unless you're 100% sure that you don't have any
diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile
index 93a6fda65f4..52d0ccfcf6e 100644
--- a/arch/x86/ia32/Makefile
+++ b/arch/x86/ia32/Makefile
@@ -2,8 +2,7 @@
# Makefile for the ia32 kernel emulation subsystem.
#
-obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o \
- ia32_binfmt.o
+obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o
sysv-$(CONFIG_SYSVIPC) := ipc32.o
obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)
diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index e0feb66a240..348f1341e1c 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -377,6 +377,39 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
__initcall(sysenter_setup);
+#ifdef CONFIG_SYSCTL
+/* Register vsyscall32 into the ABI table */
+#include <linux/sysctl.h>
+
+static ctl_table abi_table2[] = {
+ {
+ .procname = "vsyscall32",
+ .data = &sysctl_vsyscall32,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {}
+};
+
+static ctl_table abi_root_table2[] = {
+ {
+ .ctl_name = CTL_ABI,
+ .procname = "abi",
+ .mode = 0555,
+ .child = abi_table2
+ },
+ {}
+};
+
+static __init int ia32_binfmt_init(void)
+{
+ register_sysctl_table(abi_root_table2);
+ return 0;
+}
+__initcall(ia32_binfmt_init);
+#endif
+
#else /* CONFIG_X86_32 */
const char *arch_vma_name(struct vm_area_struct *vma)