x86: Modify ENTRY in sysdep.h so that p2align can be specified

No bug.

This change adds a new macro ENTRY_P2ALIGN which takes a second
argument, log2 of the desired function alignment.

The old ENTRY(name) macro is just ENTRY_P2ALIGN(name, 4) so this
doesn't affect any existing functionality.

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
This commit is contained in:
Noah Goldstein 2021-09-21 18:31:49 -05:00
parent fa80ce6023
commit fc5bd179ef

View File

@ -78,15 +78,18 @@ enum cf_protection_level
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
/* Define an entry point visible from C. */
#define ENTRY(name) \
#define ENTRY_P2ALIGN(name, alignment) \
.globl C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name),@function; \
.align ALIGNARG(4); \
.align ALIGNARG(alignment); \
C_LABEL(name) \
cfi_startproc; \
_CET_ENDBR; \
CALL_MCOUNT
/* Common entry 16 byte aligns. */
#define ENTRY(name) ENTRY_P2ALIGN (name, 4)
#undef END
#define END(name) \
cfi_endproc; \