Add a new _ASM_GET_PTR 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 <thgar...@google.com> --- arch/x86/include/asm/asm.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h index b0dc91f4bedc..6de365b8e3fd 100644 --- a/arch/x86/include/asm/asm.h +++ b/arch/x86/include/asm/asm.h @@ -57,6 +57,19 @@ # define CC_OUT(c) [_cc_ ## c] "=qm" #endif +/* Macros to get a global variable address with PIE support on 64-bit */ +#ifdef CONFIG_X86_32 +#define __ASM_GET_PTR_PRE(_src) __ASM_FORM_COMMA(movl $##_src) +#else +#ifdef __ASSEMBLY__ +#define __ASM_GET_PTR_PRE(_src) __ASM_FORM_COMMA(leaq (_src)(%rip)) +#else +#define __ASM_GET_PTR_PRE(_src) __ASM_FORM_COMMA(leaq (_src)(%%rip)) +#endif +#endif +#define _ASM_GET_PTR(_src, _dst) \ + __ASM_GET_PTR_PRE(_src) __ASM_FORM(_dst) + /* Exception table entry */ #ifdef __ASSEMBLY__ # define _ASM_EXTABLE_HANDLE(from, to, handler) \ -- 2.15.0.rc0.271.g36b669edcc-goog _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
