From: Jens Remus <jremus@linux.ibm.com>
To: binutils@sourceware.org, Indu Bhagat <indu.bhagat@oracle.com>
Cc: Jens Remus <jremus@linux.ibm.com>,
Andreas Krebbel <krebbel@linux.ibm.com>
Subject: [PATCH v3 11/15] gas: Skip SFrame FDE if .cfi_window_save
Date: Fri, 12 Apr 2024 16:47:14 +0200 [thread overview]
Message-ID: <20240412144718.4191286-12-jremus@linux.ibm.com> (raw)
In-Reply-To: <20240412144718.4191286-1-jremus@linux.ibm.com>
CFI opcode DW_CFA_AARCH64_negate_ra_state is multiplexed with
DW_CFA_GNU_window_save. Process DW_CFA_AARCH64_negate_ra_state on
AArch64. Skip generation of SFrame FDE otherwise.
gas/
* gen-sframe.c: Skip SFrame FDE if .cfi_window_save.
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
---
Notes (jremus):
Changes v2 -> v3:
- New patch. The intention is to skip all "unknown" CFI opcodes,
which SFrame does not explicitly handle. DW_CFA_GNU_window_save
seems to be handled only for the AArch64-specific multiplexed
DW_CFA_AARCH64_negate_ra_state. The logic could be changed to be
dependent on TC_AARCH64 at build-time instead of
sframe_get_abi_arch() at run-time.
gas/gen-sframe.c | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 deletions(-)
diff --git a/gas/gen-sframe.c b/gas/gen-sframe.c
index 87be3eb05ad2..98166de8cc01 100644
--- a/gas/gen-sframe.c
+++ b/gas/gen-sframe.c
@@ -1257,12 +1257,12 @@ sframe_xlate_do_restore (struct sframe_xlate_ctx *xlate_ctx,
return SFRAME_XLATE_OK;
}
-/* Translate DW_CFA_GNU_window_save into SFrame context.
+/* Translate DW_CFA_AARCH64_negate_ra_state into SFrame context.
Return SFRAME_XLATE_OK if success. */
static int
-sframe_xlate_do_gnu_window_save (struct sframe_xlate_ctx *xlate_ctx,
- struct cfi_insn_data *cfi_insn ATTRIBUTE_UNUSED)
+sframe_xlate_do_aarch64_negate_ra_state (struct sframe_xlate_ctx *xlate_ctx,
+ struct cfi_insn_data *cfi_insn ATTRIBUTE_UNUSED)
{
struct sframe_row_entry *cur_fre = xlate_ctx->cur_fre;
@@ -1274,6 +1274,25 @@ sframe_xlate_do_gnu_window_save (struct sframe_xlate_ctx *xlate_ctx,
return SFRAME_XLATE_OK;
}
+/* Translate DW_CFA_GNU_window_save into SFrame context.
+ DW_CFA_AARCH64_negate_ra_state is multiplexed with DW_CFA_GNU_window_save.
+ Return SFRAME_XLATE_OK if success. */
+
+static int
+sframe_xlate_do_gnu_window_save (struct sframe_xlate_ctx *xlate_ctx,
+ struct cfi_insn_data *cfi_insn)
+{
+ unsigned char abi_arch = sframe_get_abi_arch ();
+
+ /* Translate DW_CFA_AARCH64_negate_ra_state into SFrame context. */
+ if (abi_arch == SFRAME_ABI_AARCH64_ENDIAN_BIG
+ || abi_arch == SFRAME_ABI_AARCH64_ENDIAN_LITTLE)
+ return sframe_xlate_do_aarch64_negate_ra_state (xlate_ctx, cfi_insn);
+
+ as_warn (_("skipping SFrame FDE due to .cfi_window_save"));
+ return SFRAME_XLATE_ERR_NOTREPRESENTED; /* Not represented. */
+}
+
/* Returns the DWARF call frame instruction name or fake CFI name for the
specified CFI opcode, or NULL if the value is not recognized. */
--
2.40.1
next prev parent reply other threads:[~2024-04-12 14:47 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-12 14:47 [PATCH v3 00/15] sframe: Enhancements to SFrame info generation Jens Remus
2024-04-12 14:47 ` [PATCH v3 01/15] x86: Remove unused SFrame CFI RA register variable Jens Remus
2024-04-12 14:47 ` [PATCH v3 02/15] gas: Enhance arch-specific SFrame configuration descriptions Jens Remus
2024-04-18 7:39 ` Indu Bhagat
2024-05-03 12:30 ` Jens Remus
2024-04-12 14:47 ` [PATCH v3 03/15] readelf/objdump: Dump SFrame CFA fixed FP and RA offsets Jens Remus
2024-04-18 7:39 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 04/15] readelf/objdump: Display SFrame fixed RA offset as 'f' in dump Jens Remus
2024-04-18 7:40 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 05/15] gas: Print DWARF call frame insn name in SFrame warning message Jens Remus
2024-04-18 7:40 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 06/15] gas: Skip SFrame FDE if CFI specifies non-FP/SP base register Jens Remus
2024-04-18 7:40 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 07/15] gas: Warn if SFrame FDE is skipped due to non-default return column Jens Remus
2024-04-18 7:40 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 08/15] gas: Refactor SFrame CFI opcode DW_CFA_register processing Jens Remus
2024-04-18 7:40 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 09/15] gas: User readable warnings if SFrame FDE is not generated Jens Remus
2024-04-18 20:33 ` Indu Bhagat
2024-05-03 12:30 ` Jens Remus
2024-05-03 23:41 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 10/15] gas: Skip SFrame FDE if FP without RA on stack Jens Remus
2024-04-16 13:14 ` Jens Remus
2024-04-17 23:56 ` Indu Bhagat
2024-04-18 10:27 ` Jens Remus
2024-04-18 20:35 ` Indu Bhagat
2024-04-12 14:47 ` Jens Remus [this message]
2024-04-18 20:36 ` [PATCH v3 11/15] gas: Skip SFrame FDE if .cfi_window_save Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 12/15] gas: Don't skip SFrame FDE if .cfi_register specifies RA w/o tracking Jens Remus
2024-04-18 20:36 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 13/15] gas: Don't skip SFrame FDE if .cfi_register specifies SP register Jens Remus
2024-04-18 20:37 ` Indu Bhagat
2024-04-19 13:13 ` Jens Remus
2024-04-23 8:15 ` Indu Bhagat
2024-04-25 22:22 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 14/15] gas: Test predicate whether SFrame RA tracking is used Jens Remus
2024-04-18 20:37 ` Indu Bhagat
2024-04-12 14:47 ` [PATCH v3 15/15] gas: Validate SFrame RA tracking and fixed RA offset Jens Remus
2024-04-18 20:38 ` Indu Bhagat
2024-05-03 16:40 ` Jens Remus
2024-05-04 0:22 ` Indu Bhagat
2024-05-06 11:41 ` Jens Remus
2024-05-06 14:39 ` Jens Remus
2024-05-16 20:45 ` Indu Bhagat
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