diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 12 | ||||
| -rw-r--r-- | include/linux/init.h | 13 |
2 files changed, 25 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index f3806a74c47..8307b1bb337 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -9,6 +9,11 @@ /* Align . to a 8 byte boundary equals to maximum function alignment. */ #define ALIGN_FUNCTION() . = ALIGN(8) +/* .data section */ +#define DATA_DATA \ + *(.data) \ + *(.data.init.refok) + #define RODATA \ . = ALIGN(4096); \ .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ @@ -139,6 +144,13 @@ VMLINUX_SYMBOL(__security_initcall_end) = .; \ } +/* .text section. Map to function alignment to avoid address changes + * during second ld run in second ld pass when generating System.map */ +#define TEXT_TEXT \ + ALIGN_FUNCTION(); \ + *(.text) \ + *(.text.init.refok) + /* sched.text is aling to function alignment to secure we have same * address even at second ld pass when generating System.map */ #define SCHED_TEXT \ diff --git a/include/linux/init.h b/include/linux/init.h index e007ae4dc41..56ec4c62eee 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -45,6 +45,19 @@ #define __exitdata __attribute__ ((__section__(".exit.data"))) #define __exit_call __attribute_used__ __attribute__ ((__section__ (".exitcall.exit"))) +/* modpost check for section mismatches during the kernel build. + * A section mismatch happens when there are references from a + * code or data section to an init section (both code or data). + * The init sections are (for most archs) discarded by the kernel + * when early init has completed so all such references are potential bugs. + * For exit sections the same issue exists. + * The following markers are used for the cases where the reference to + * the init/exit section (code or data) is valid and will teach modpost + * not to issue a warning. + * The markers follow same syntax rules as __init / __initdata. */ +#define __init_refok noinline __attribute__ ((__section__ (".text.init.refok"))) +#define __initdata_refok __attribute__ ((__section__ (".data.init.refok"))) + #ifdef MODULE #define __exit __attribute__ ((__section__(".exit.text"))) #else |