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>,
Linus Torvalds <torvalds@linux-foundation.org>,
Denys Vlasenko <dvlasenk@redhat.com>,
Andy Lutomirski <luto@amacapital.net>,
Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
Josh Poimboeuf <jpoimboe@redhat.com>
Subject: [PATCH v3 1/7] x86-32, kgdb: Don't use thread.ip in sleeping_thread_to_gdb_regs()
Date: Sat, 13 Aug 2016 12:38:16 -0400 [thread overview]
Message-ID: <1471106302-10159-2-git-send-email-brgerst@gmail.com> (raw)
In-Reply-To: <1471106302-10159-1-git-send-email-brgerst@gmail.com>
Match 64-bit and set gdb_regs[GDB_PC] to zero. thread.ip is always the
same point in the scheduler (except for newly forked processes), and will
be removed in a future patch.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/kernel/kgdb.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index 04cde52..fe649a5 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -172,7 +172,6 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
gdb_regs[GDB_ES] = __KERNEL_DS;
gdb_regs[GDB_PS] = 0;
gdb_regs[GDB_CS] = __KERNEL_CS;
- gdb_regs[GDB_PC] = p->thread.ip;
gdb_regs[GDB_SS] = __KERNEL_DS;
gdb_regs[GDB_FS] = 0xFFFF;
gdb_regs[GDB_GS] = 0xFFFF;
@@ -180,7 +179,6 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
gdb_regs32[GDB_PS] = *(unsigned long *)(p->thread.sp + 8);
gdb_regs32[GDB_CS] = __KERNEL_CS;
gdb_regs32[GDB_SS] = __KERNEL_DS;
- gdb_regs[GDB_PC] = 0;
gdb_regs[GDB_R8] = 0;
gdb_regs[GDB_R9] = 0;
gdb_regs[GDB_R10] = 0;
@@ -190,6 +188,7 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
gdb_regs[GDB_R14] = 0;
gdb_regs[GDB_R15] = 0;
#endif
+ gdb_regs[GDB_PC] = 0;
gdb_regs[GDB_SP] = p->thread.sp;
}
--
2.5.5
next prev parent reply other threads:[~2016-08-13 16:38 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-13 16:38 [PATCH v3 0/7] x86: Rewrite switch_to() Brian Gerst
2016-08-13 16:38 ` Brian Gerst [this message]
2016-08-24 13:07 ` [tip:x86/asm] sched/x86/32, kgdb: Don't use thread.ip in sleeping_thread_to_gdb_regs() tip-bot for Brian Gerst
2016-08-13 16:38 ` [PATCH v3 2/7] x86-64, kgdb: clear GDB_PS on 64-bit Brian Gerst
2016-08-24 13:07 ` [tip:x86/asm] sched/x86/64, kgdb: Clear " tip-bot for Brian Gerst
2016-08-13 16:38 ` [PATCH v3 3/7] x86: Add struct inactive_task_frame Brian Gerst
2016-08-24 13:08 ` [tip:x86/asm] sched/x86: Add 'struct inactive_task_frame' to better document the sleeping task stack frame tip-bot for Brian Gerst
2016-08-13 16:38 ` [PATCH v3 4/7] x86: Rewrite switch_to() code Brian Gerst
2016-08-24 13:08 ` [tip:x86/asm] sched/x86: Rewrite the " tip-bot for Brian Gerst
2016-08-13 16:38 ` [PATCH v3 5/7] x86: Pass kernel thread parameters in fork_frame Brian Gerst
2016-08-24 13:09 ` [tip:x86/asm] sched/x86: Pass kernel thread parameters in 'struct fork_frame' tip-bot for Brian Gerst
2016-08-13 16:38 ` [PATCH v3 6/7] x86: Fix thread_saved_pc() Brian Gerst
2016-08-24 13:09 ` [tip:x86/asm] sched/x86: " tip-bot for Brian Gerst
2016-08-13 16:38 ` [PATCH v3 7/7] Revert "sched: Mark __schedule() stack frame as non-standard" Brian Gerst
2016-08-24 13:09 ` [tip:x86/asm] sched: Remove __schedule() non-standard frame annotation tip-bot for Brian Gerst
2016-08-13 17:16 ` [PATCH v3 0/7] x86: Rewrite switch_to() Linus Torvalds
2016-08-13 18:15 ` Brian Gerst
2016-08-13 18:45 ` Ingo Molnar
2016-08-13 19:33 ` Andy Lutomirski
2016-08-17 5:16 ` Herbert Xu
2016-08-14 14:18 ` Brian Gerst
2016-08-15 5:10 ` Ingo Molnar
2016-08-15 11:43 ` Brian Gerst
2016-08-17 21:23 ` Andy Lutomirski
2016-08-17 21:20 ` Josh Poimboeuf
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