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| author | Richard Weinberger <richard@nod.at> | 2011-07-25 17:12:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 20:57:13 -0700 |
| commit | b743ac54e54ca18fb7164a97cc77cf1ccee0b0f7 (patch) | |
| tree | a9dced710d289d1594ec2a27ca2a88cef5186ac1 | |
| parent | 2a6d0ac182688d4d23357ece744978706c044aad (diff) | |
| download | lwn-b743ac54e54ca18fb7164a97cc77cf1ccee0b0f7.tar.gz lwn-b743ac54e54ca18fb7164a97cc77cf1ccee0b0f7.zip | |
um: disable scan_elf_aux() on x86_64
Reusing the host's vDSO makes only sense on x86_32.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/um/os-Linux/Makefile | 4 | ||||
| -rw-r--r-- | arch/um/os-Linux/elf_aux.c | 7 | ||||
| -rw-r--r-- | arch/um/os-Linux/main.c | 4 |
3 files changed, 8 insertions, 7 deletions
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index d66f0388f091..b33f4dfe7ae5 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -3,10 +3,12 @@ # Licensed under the GPL # -obj-y = aio.o elf_aux.o execvp.o file.o helper.o irq.o main.o mem.o process.o \ +obj-y = aio.o execvp.o file.o helper.o irq.o main.o mem.o process.o \ registers.o sigio.o signal.o start_up.o time.o tty.o uaccess.o \ umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/ skas/ +obj-$(CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA) += elf_aux.o + USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \ main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \ tty.o tls.o uaccess.o umid.o util.o diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c index 608784d4ec57..953323799381 100644 --- a/arch/um/os-Linux/elf_aux.c +++ b/arch/um/os-Linux/elf_aux.c @@ -14,16 +14,11 @@ #include "mem_user.h" #include <kern_constants.h> -/* Use the one from the kernel - the host may miss it, if having old headers. */ -#if UM_ELF_CLASS == UM_ELFCLASS32 typedef Elf32_auxv_t elf_auxv_t; -#else -typedef Elf64_auxv_t elf_auxv_t; -#endif /* These are initialized very early in boot and never changed */ char * elf_aux_platform; -long elf_aux_hwcap; +extern long elf_aux_hwcap; unsigned long vsyscall_ehdr; unsigned long vsyscall_end; unsigned long __kernel_vsyscall; diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c index fb2a97a75fb1..8471b817d94f 100644 --- a/arch/um/os-Linux/main.c +++ b/arch/um/os-Linux/main.c @@ -21,6 +21,8 @@ #define STACKSIZE (8 * 1024 * 1024) #define THREAD_NAME_LEN (256) +long elf_aux_hwcap; + static void set_stklim(void) { struct rlimit lim; @@ -143,7 +145,9 @@ int __init main(int argc, char **argv, char **envp) install_fatal_handler(SIGINT); install_fatal_handler(SIGTERM); +#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA scan_elf_aux(envp); +#endif do_uml_initcalls(); ret = linux_main(argc, argv); |