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Subject[PATCH v2 2/6] x86-64: Move the "user" vsyscall segment out of the data segment.
Date
The kernel's loader doesn't seem to care, but gold complains.

Signed-off-by: Andy Lutomirski <luto@mit.edu>
Reported-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
---
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


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