objtool: Use relative pointers for annotations

They produce the needed relocations while using half the space. Signed-off-by: Josh Poimboeuf <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Link: https://lore.kernel.org/r/bed05c64e28200220c9b1754a2f3ce71f73076ea.1677683419.git.jpoimboe@kernel.org
pop-os · Mar 23, 2023 · 1c0c1fa · 1c0c1fa
1 parent f7515d9
commit 1c0c1fa
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Showing 2 changed files with 9 additions and 9 deletions.
diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
@@ -194,9 +194,9 @@
  * builds.
  */
 .macro ANNOTATE_RETPOLINE_SAFE
-	.Lannotate_\@:
+.Lhere_\@:
 	.pushsection .discard.retpoline_safe
-	_ASM_PTR .Lannotate_\@
+	.long .Lhere_\@ - .
 	.popsection
 .endm
 
@@ -318,7 +318,7 @@
 #define ANNOTATE_RETPOLINE_SAFE					\
 	"999:\n\t"						\
 	".pushsection .discard.retpoline_safe\n\t"		\
-	_ASM_PTR " 999b\n\t"					\
+	".long 999b - .\n\t"					\
 	".popsection\n\t"
 
 typedef u8 retpoline_thunk_t[RETPOLINE_THUNK_SIZE];

diff --git a/include/linux/objtool.h b/include/linux/objtool.h
@@ -49,7 +49,7 @@
 #define ANNOTATE_NOENDBR					\
 	"986: \n\t"						\
 	".pushsection .discard.noendbr\n\t"			\
-	_ASM_PTR " 986b\n\t"					\
+	".long 986b - .\n\t"					\
 	".popsection\n\t"
 
 #define ASM_REACHABLE							\
@@ -67,7 +67,7 @@
 #define ANNOTATE_INTRA_FUNCTION_CALL				\
 	999:							\
 	.pushsection .discard.intra_function_calls;		\
-	.long 999b;						\
+	.long 999b - .;						\
 	.popsection;
 
 /*
@@ -92,10 +92,10 @@
  * inconsistencies.
  */
 .macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 signal=0 end=0
-.Lunwind_hint_ip_\@:
+.Lhere_\@:
 	.pushsection .discard.unwind_hints
 		/* struct unwind_hint */
-		.long .Lunwind_hint_ip_\@ - .
+		.long .Lhere_\@ - .
 		.short \sp_offset
 		.byte \sp_reg
 		.byte \type
@@ -107,7 +107,7 @@
 
 .macro STACK_FRAME_NON_STANDARD func:req
 	.pushsection .discard.func_stack_frame_non_standard, "aw"
-	_ASM_PTR \func
+	.long \func - .
 	.popsection
 .endm
 
@@ -120,7 +120,7 @@
 .macro ANNOTATE_NOENDBR
 .Lhere_\@:
 	.pushsection .discard.noendbr
-	.quad	.Lhere_\@
+	.long	.Lhere_\@ - .
 	.popsection
 .endm