[PATCH v2 01/21] powerpc: Create stackframe information on syscall

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From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org
Subject: [PATCH v2 01/21] powerpc: Create stackframe information on syscall
Date: Mon, 26 Feb 2018 18:03:16 -0300	[thread overview]
Message-ID: <1519679016-12241-2-git-send-email-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <1519679016-12241-1-git-send-email-adhemerval.zanella@linaro.org>

This patch adds a minimal stackframe creation on powerpc syscall
implementation so backtrace works correctly on a signal handler.

Checked on powerpc64le-linux-gnu.

	* sysdeps/unix/sysv/linux/powerpc/syscall.S (syscall): Create stack
	frame.
---
 ChangeLog                                 |  3 +++
 sysdeps/unix/sysv/linux/powerpc/syscall.S | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/powerpc/syscall.S b/sysdeps/unix/sysv/linux/powerpc/syscall.S
index 2da9172..fae0fe8 100644
--- a/sysdeps/unix/sysv/linux/powerpc/syscall.S
+++ b/sysdeps/unix/sysv/linux/powerpc/syscall.S
@@ -19,6 +19,14 @@
 
 ENTRY (syscall)
 	ABORT_TRANSACTION
+	/* Creates a minimum stack frame so backtrace works.  */
+#ifdef __powerpc64__
+	stdu r1, -FRAME_MIN_SIZE (r1)
+	cfi_adjust_cfa_offset (FRAME_MIN_SIZE)
+#else
+	stwu r1,-16(1)
+	cfi_def_cfa_offset (16)
+#endif
 	mr   r0,r3
 	mr   r3,r4
 	mr   r4,r5
@@ -26,6 +34,12 @@ ENTRY (syscall)
 	mr   r6,r7
 	mr   r7,r8
 	mr   r8,r9
+#ifdef __powerpc64__
+	addi r1, r1, FRAME_MIN_SIZE
+#else
+	addi r1,r1,16
+#endif
+	cfi_def_cfa_offset (0)
 	sc
 	PSEUDO_RET
 PSEUDO_END (syscall)
-- 
2.7.4

next prev parent reply	other threads:[~2018-02-26 21:01 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-26 21:03 [PATCH v2 00/21] nptl: Fix Race conditions in pthread cancellation (BZ#12683) Adhemerval Zanella
2018-02-26 21:03 ` Adhemerval Zanella [this message]
2018-02-26 21:41   ` [PATCH v2 01/21] powerpc: Create stackframe information on syscall Andreas Schwab
2018-02-27 12:05     ` Adhemerval Zanella
2018-05-07  2:49   ` Zack Weinberg
2018-05-07 13:57     ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 02/21] nptl: Fix testcases for new pthread cancellation mechanism Adhemerval Zanella
2018-02-26 21:43   ` Andreas Schwab
2018-02-27 12:05     ` Adhemerval Zanella
2018-05-07  2:49   ` Zack Weinberg
2018-05-07 17:13     ` Adhemerval Zanella
2018-05-08 13:35       ` Zack Weinberg
2018-05-08 17:26         ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 03/21] nptl: Fix Race conditions in pthread cancellation (BZ#12683) Adhemerval Zanella
2018-04-27 12:20   ` Zack Weinberg
2018-04-27 12:25     ` Adhemerval Zanella
2018-05-07  2:48       ` Zack Weinberg
2018-05-07  2:49   ` Zack Weinberg
2018-05-08 17:11     ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 04/21] nptl: x86_64: " Adhemerval Zanella
2018-05-07  2:49   ` Zack Weinberg
2018-05-08 17:55     ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 05/21] nptl: x32: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 06/21] nptl: i386: " Adhemerval Zanella
2018-05-07  2:49   ` Zack Weinberg
2018-05-08 17:56     ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 07/21] nptl: powerpc: " Adhemerval Zanella
2018-05-07 19:25   ` Tulio Magno Quites Machado Filho
2018-05-08 18:07     ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 08/21] nptl: aarch64: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 09/21] nptl: arm: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 10/21] nptl: s390: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 11/21] nptl: ia64: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 12/21] nptl: alpha: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 13/21] nptl: m68k: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 14/21] nptl: microblaze: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 15/21] nptl: tile: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 16/21] nptl: sparc: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 17/21] nptl: nios2: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 18/21] nptl: sh: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 19/21] nptl: mips: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 20/21] nptl: hppa: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 21/21] nptl: riscv: " Adhemerval Zanella
2018-02-27  1:16   ` DJ Delorie
2018-02-27 13:03     ` Adhemerval Zanella

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:2da9172 dfblob:fae0fe8
	(help)

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