The GOT is changed during early boot when relocations are applied. Make it read-only directly. This table exists only for PIE binary.
Position Independent Executable (PIE) support will allow to extended the KASLR randomization range below the -2G memory limit. Signed-off-by: Thomas Garnier <thgar...@google.com> --- include/asm-generic/vmlinux.lds.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index e373e2e10f6a..e5b0710fe693 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -314,6 +314,17 @@ __end_ro_after_init = .; #endif +#ifdef CONFIG_X86_PIE +#define RO_GOT_X86 \ + .got : AT(ADDR(.got) - LOAD_OFFSET) { \ + VMLINUX_SYMBOL(__start_got) = .; \ + *(.got); \ + VMLINUX_SYMBOL(__end_got) = .; \ + } +#else +#define RO_GOT_X86 +#endif + /* * Read only Data */ @@ -370,6 +381,7 @@ __end_builtin_fw = .; \ } \ \ + RO_GOT_X86 \ TRACEDATA \ \ /* Kernel symbol table: Normal symbols */ \ -- 2.17.0.441.gb46fe60e1d-goog _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel