From: Brian Gerst <brgerst@gmail.com>
To: x86@kernel.org, linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Denys Vlasenko <dvlasenk@redhat.com>,
Andy Lutomirski <luto@amacapital.net>,
Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH v2 2/6] x86-64, kgdb: clear GDB_PS on 64-bit
Date: Sat, 18 Jun 2016 16:56:14 -0400 [thread overview]
Message-ID: <1466283378-17062-3-git-send-email-brgerst@gmail.com> (raw)
In-Reply-To: <1466283378-17062-1-git-send-email-brgerst@gmail.com>
switch_to() no longer saves EFLAGS, so it's bogus to look for it on the
stack. Set it to zero like 32-bit.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/kernel/kgdb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index fe649a5..5e3f294 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -176,7 +176,7 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
gdb_regs[GDB_FS] = 0xFFFF;
gdb_regs[GDB_GS] = 0xFFFF;
#else
- gdb_regs32[GDB_PS] = *(unsigned long *)(p->thread.sp + 8);
+ gdb_regs32[GDB_PS] = 0;
gdb_regs32[GDB_CS] = __KERNEL_CS;
gdb_regs32[GDB_SS] = __KERNEL_DS;
gdb_regs[GDB_R8] = 0;
--
2.5.5
next prev parent reply other threads:[~2016-06-18 20:56 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-18 20:56 [PATCH v2 0/6] x86: Rewrite switch_to() Brian Gerst
2016-06-18 20:56 ` [PATCH v2 1/6] x86-32, kgdb: Don't use thread.ip in sleeping_thread_to_gdb_regs() Brian Gerst
2016-06-18 20:56 ` Brian Gerst [this message]
2016-06-18 20:56 ` [PATCH v2 3/6] x86: Add struct inactive_task_frame Brian Gerst
2016-06-19 21:18 ` Andy Lutomirski
2016-06-20 15:39 ` Josh Poimboeuf
2016-06-18 20:56 ` [PATCH v2 4/6] x86: Rewrite switch_to() code Brian Gerst
2016-06-19 21:22 ` Andy Lutomirski
2016-06-20 15:44 ` Josh Poimboeuf
2016-06-18 20:56 ` [PATCH v2 5/6] x86: Pass kernel thread parameters in fork_frame Brian Gerst
2016-06-19 21:28 ` Andy Lutomirski
2016-06-19 22:01 ` Brian Gerst
2016-06-20 13:51 ` Borislav Petkov
2016-06-20 15:01 ` Brian Gerst
2016-06-20 15:14 ` Borislav Petkov
2016-06-22 4:24 ` Brian Gerst
2016-07-09 12:01 ` Ingo Molnar
2016-06-18 20:56 ` [PATCH v2 6/6] x86: Fix thread_saved_pc() Brian Gerst
2016-06-20 16:01 ` Josh Poimboeuf
2016-06-22 4:27 ` Brian Gerst
2016-06-24 18:12 ` Josh Poimboeuf
2016-06-19 22:05 ` [PATCH v2 0/6] x86: Rewrite switch_to() Brian Gerst
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