[PATCH v2 2/6] x86-64: Move the "user" vsyscall segment out of the data segment.
From: Andy Lutomirski <hidden>
Date: 2011-08-03 13:31:50
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
The kernel's loader doesn't seem to care, but gold complains. Signed-off-by: Andy Lutomirski <redacted> Reported-by: Arkadiusz Miskiewicz <redacted> --- arch/x86/kernel/vmlinux.lds.S | 36 ++++++++++++++++++------------------ 1 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 4aa9c54..e79fb39 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S@@ -154,6 +154,24 @@ SECTIONS #ifdef CONFIG_X86_64 + . = ALIGN(PAGE_SIZE); + __vvar_page = .; + + .vvar : AT(ADDR(.vvar) - LOAD_OFFSET) { + + /* Place all vvars at the offsets in asm/vvar.h. */ +#define EMIT_VVAR(name, offset) \ + . = offset; \ + *(.vvar_ ## name) +#define __VVAR_KERNEL_LDS +#include <asm/vvar.h> +#undef __VVAR_KERNEL_LDS +#undef EMIT_VVAR + + } :data + + . = ALIGN(__vvar_page + PAGE_SIZE, PAGE_SIZE); + #define VSYSCALL_ADDR (-10*1024*1024) #define VLOAD_OFFSET (VSYSCALL_ADDR - __vsyscall_0 + LOAD_OFFSET)
@@ -162,7 +180,6 @@ SECTIONS #define VVIRT_OFFSET (VSYSCALL_ADDR - __vsyscall_0) #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET) - . = ALIGN(4096); __vsyscall_0 = .; . = VSYSCALL_ADDR;
@@ -185,23 +202,6 @@ SECTIONS #undef VVIRT_OFFSET #undef VVIRT - __vvar_page = .; - - .vvar : AT(ADDR(.vvar) - LOAD_OFFSET) { - - /* Place all vvars at the offsets in asm/vvar.h. */ -#define EMIT_VVAR(name, offset) \ - . = offset; \ - *(.vvar_ ## name) -#define __VVAR_KERNEL_LDS -#include <asm/vvar.h> -#undef __VVAR_KERNEL_LDS -#undef EMIT_VVAR - - } :data - - . = ALIGN(__vvar_page + PAGE_SIZE, PAGE_SIZE); - #endif /* CONFIG_X86_64 */ /* Init code and data - will be freed after init */
--
1.7.6