From: Indu Bhagat <indu.bhagat@oracle.com>
To: Jens Remus <jremus@linux.ibm.com>, binutils@sourceware.org
Cc: Andreas Krebbel <krebbel@linux.ibm.com>
Subject: Re: [PATCH v3 07/15] gas: Warn if SFrame FDE is skipped due to non-default return column
Date: Thu, 18 Apr 2024 00:40:35 -0700 [thread overview]
Message-ID: <efca7abb-403d-4b2b-826f-59be2b9fd183@oracle.com> (raw)
In-Reply-To: <20240412144718.4191286-8-jremus@linux.ibm.com>
On 4/12/24 07:47, Jens Remus wrote:
> Print a warning message if SFrame FDE is skipped due to a non-default
> DWARF return column (i.e. return address (RA) register number). This
> may be caused by the use of CFI directive .cfi_return_column with a
> non-default return address (RA) register number in the processed
> assembler source code.
>
> Warning: skipping SFrame FDE due to non-default DWARF return column
>
> gas/
> * gen-sframe.c: Warn if SFrame FDE is skipped due to non-default
> DWARF return column.
>
> gas/testsuite/
> * gas/cfi-sframe/common-empty-3.d: Update test case to expect
> for new warning message when SFrame FDE is skipped due to
> a non-default DWARF return column.
>
OK.
Thanks
> Reviewed-by: Andreas Krebbel <krebbel@linux.ibm.com>
> Reviewed-by: Indu Bhagat <indu.bhagat@oracle.com>
> Signed-off-by: Jens Remus <jremus@linux.ibm.com>
> ---
>
> Notes (jremus):
> Changes v2 -> v3:
> - Enhance comment in code as suggested by Indu.
> - Corrected formatting of ChangeLog in commit message.
>
> Without this patch the assembler would generate incomplete SFrame
> information without warning for the s390-specific SFrame error test
> case 4, that gets introduced by patch "s390: Initial support to
> generate .sframe from CFI directives in assembler".
>
> gas/gen-sframe.c | 10 +++++++---
> gas/testsuite/gas/cfi-sframe/common-empty-3.d | 1 +
> 2 files changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/gas/gen-sframe.c b/gas/gen-sframe.c
> index 1269b2b77c54..fe8b24906c1b 100644
> --- a/gas/gen-sframe.c
> +++ b/gas/gen-sframe.c
> @@ -1343,9 +1343,12 @@ sframe_do_fde (struct sframe_xlate_ctx *xlate_ctx,
>
> xlate_ctx->dw_fde = dw_fde;
>
> - /* If the return column is not RIP, SFrame format cannot represent it. */
> + /* SFrame format cannot represent a non-default DWARF return column reg. */
> if (xlate_ctx->dw_fde->return_column != DWARF2_DEFAULT_RETURN_COLUMN)
> - return SFRAME_XLATE_ERR_NOTREPRESENTED;
> + {
> + as_warn (_("skipping SFrame FDE due to non-default DWARF return column"));
> + return SFRAME_XLATE_ERR_NOTREPRESENTED;
> + }
>
> /* Iterate over the CFIs and create SFrame FREs. */
> for (cfi_insn = dw_fde->data; cfi_insn; cfi_insn = cfi_insn->next)
> @@ -1355,7 +1358,8 @@ sframe_do_fde (struct sframe_xlate_ctx *xlate_ctx,
> if (err != SFRAME_XLATE_OK)
> {
> /* Skip generating SFrame stack trace info for the function if any
> - offending CFI is encountered by sframe_do_cfi_insn (). */
> + offending CFI is encountered by sframe_do_cfi_insn (). Warning
> + message already printed by sframe_do_cfi_insn (). */
> return err; /* Return the error code. */
> }
> }
> diff --git a/gas/testsuite/gas/cfi-sframe/common-empty-3.d b/gas/testsuite/gas/cfi-sframe/common-empty-3.d
> index 5914c620760d..d17521dd88ea 100644
> --- a/gas/testsuite/gas/cfi-sframe/common-empty-3.d
> +++ b/gas/testsuite/gas/cfi-sframe/common-empty-3.d
> @@ -1,4 +1,5 @@
> #as: --gsframe
> +#warning: skipping SFrame FDE due to non-default DWARF return column
> #objdump: --sframe=.sframe
> #name: SFrame supports only default return column
> #...
next prev parent reply other threads:[~2024-04-18 7:40 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 [this message]
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 ` [PATCH v3 11/15] gas: Skip SFrame FDE if .cfi_window_save Jens Remus
2024-04-18 20:36 ` 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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