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[v6,03/27] x86: Add macro to get symbol address for PIE support

Message ID 20190131192533.34130-4-thgarnie@chromium.org (mailing list archive)
State New, archived
Headers show
Series x86: PIE support and option to extend KASLR randomization | expand

Commit Message

Thomas Garnier Jan. 31, 2019, 7:24 p.m. UTC 
Add a new _ASM_MOVABS macro to fetch a symbol address. It will be used
to replace "_ASM_MOV $<symbol>, %dst" code construct that are not compatible
with PIE.

Signed-off-by: Thomas Garnier <thgarnie@chromium.org>
---
 arch/x86/include/asm/asm.h | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 6467757bb39f..5ff63ca80bca 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -30,6 +30,7 @@ 
 #define _ASM_ALIGN	__ASM_SEL(.balign 4, .balign 8)
 
 #define _ASM_MOV	__ASM_SIZE(mov)
+#define _ASM_MOVABS	__ASM_SEL(movl, movabsq)
 #define _ASM_INC	__ASM_SIZE(inc)
 #define _ASM_DEC	__ASM_SIZE(dec)
 #define _ASM_ADD	__ASM_SIZE(add)