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From: Helge Deller <deller@kernel.org>
To: qemu-devel@nongnu.org
Cc: "Laurent Vivier" <laurent@vivier.eu>,
	"Aleksandar Rikalo" <arikalo@gmail.com>,
	"Philippe Mathieu-Daudé" <philmd@oss.qualcomm.com>,
	"Helge Deller" <deller@gmx.de>,
	"Jiaxun Yang" <jiaxun.yang@flygoat.com>,
	"Aurelien Jarno" <aurelien@aurel32.net>,
	"Pierrick Bouvier" <pierrick.bouvier@oss.qualcomm.com>
Subject: [PULL 2/5] linux-user/mips64: set EF_MIPS_ABI2 in mipsn32 core dumps
Date: Sun,  4 Oct 2026 13:43:07 +0200	[thread overview]
Message-ID: <20261004114311.3874-3-deller@kernel.org> (raw)
In-Reply-To: <20261004114311.3874-1-deller@kernel.org>

From: Matt Turner <mattst88@gmail.com>

mipsn32 core files had e_flags 0, so gdb took them for o32, found no
general-purpose registers and failed with an internal error in
frame_unwind_find_by_frame.

Linux sets e_flags to EF_MIPS_ABI2 for n32 cores (user_mipsn32_view in
arch/mips/kernel/ptrace.c).

Signed-off-by: Helge Deller <deller@gmx.de>
---
 linux-user/mips64/target_elf.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/linux-user/mips64/target_elf.h b/linux-user/mips64/target_elf.h
index efb5d97563..fd9fb89269 100644
--- a/linux-user/mips64/target_elf.h
+++ b/linux-user/mips64/target_elf.h
@@ -16,6 +16,8 @@
 
 #ifdef TARGET_ABI_MIPSN32
 #define elf_check_abi(x)        ((x) & EF_MIPS_ABI2)
+/* See linux kernel: arch/mips/kernel/ptrace.c, user_mipsn32_view.  */
+#define elf_core_eflags(info)   EF_MIPS_ABI2
 #else
 #define elf_check_abi(x)        (!((x) & EF_MIPS_ABI2))
 #endif
-- 
2.54.0



  parent reply	other threads:[~2026-10-04 11:44 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-04 11:43 [PULL 0/5] Linux user next patches Helge Deller
2026-10-04 11:43 ` [PULL 1/5] linux-user: add elf_core_eflags() hook for core dump e_flags Helge Deller
2026-10-04 11:43 ` Helge Deller [this message]
2026-10-04 11:43 ` [PULL 3/5] linux-user/riscv: copy the executable's e_flags into core dumps Helge Deller
2026-10-04 11:43 ` [PULL 4/5] target/mips: fix Loongson-3A4000 definition to have abs2008 and nan2008 Helge Deller
2026-10-04 11:43 ` [PULL 5/5] linux-user/mips: pick Loongson-3A4000 if a pre-r6 mips64 binary needs nan2008 Helge Deller
2026-10-06  9:24 ` [PULL 0/5] Linux user next patches Richard Henderson

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