[PATCH 3/9] sframe: Enhance comments for SFRAME_CFA_*_REG macros

[Jens Remus <jremus@linux.ibm.com>]

Specify what the SFRAME_CFA_*_REG register numbers are used for:
- SP (stack pointer): CFA tracking
- FP (frame pointer): CFA and FP tracking
- RA (return address): RA tracking

gas/
	* config/tc-aarch64.h: Enhance comments for SFRAME_CFA_*_REG
	  macros.
	* config/tc-i386.h: Likewise.

Reviewed-by: Andreas Krebbel <krebbel@linux.ibm.com>
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
---
 gas/config/tc-aarch64.h | 6 +++---
 gas/config/tc-i386.h    | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/gas/config/tc-aarch64.h b/gas/config/tc-aarch64.h
index 599d78db7908..59c9b5a09ec0 100644
--- a/gas/config/tc-aarch64.h
+++ b/gas/config/tc-aarch64.h
@@ -267,15 +267,15 @@ extern void aarch64_after_parse_args (void);
 extern bool aarch64_support_sframe_p (void);
 #define support_sframe_p aarch64_support_sframe_p
 
-/* The stack-pointer register number for SFrame stack trace info.  */
+/* The stack-pointer register number for CFA tracking.  */
 extern unsigned int aarch64_sframe_cfa_sp_reg;
 #define SFRAME_CFA_SP_REG aarch64_sframe_cfa_sp_reg
 
-/* The frame-pointer register number for SFrame stack trace info.  */
+/* The frame-pointer register number for CFA and FP tracking.  */
 extern unsigned int aarch64_sframe_cfa_fp_reg;
 #define SFRAME_CFA_FP_REG aarch64_sframe_cfa_fp_reg
 
-/* The return address register number for SFrame stack trace info.  */
+/* The return address register number for RA tracking.  */
 extern unsigned int aarch64_sframe_cfa_ra_reg;
 #define SFRAME_CFA_RA_REG aarch64_sframe_cfa_ra_reg
 
diff --git a/gas/config/tc-i386.h b/gas/config/tc-i386.h
index b93799a3b48c..0d6fb002166f 100644
--- a/gas/config/tc-i386.h
+++ b/gas/config/tc-i386.h
@@ -440,11 +440,11 @@ extern bool x86_scfi_callee_saved_p (uint32_t dw2reg_num);
 extern bool x86_support_sframe_p (void);
 #define support_sframe_p x86_support_sframe_p
 
-/* The stack-pointer register number for SFrame stack trace info.  */
+/* The stack-pointer register number for CFA tracking.  */
 extern unsigned int x86_sframe_cfa_sp_reg;
 #define SFRAME_CFA_SP_REG x86_sframe_cfa_sp_reg
 
-/* The frame-pointer register number for SFrame stack trace info.  */
+/* The frame-pointer register number for CFA and FP tracking.  */
 extern unsigned int x86_sframe_cfa_fp_reg;
 #define SFRAME_CFA_FP_REG x86_sframe_cfa_fp_reg
 
-- 
2.40.1