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authorBrian Gerst <brgerst@gmail.com>2016-08-13 12:38:18 -0400
committerIngo Molnar <mingo@kernel.org>2016-08-24 12:27:41 +0200
commit7b32aeadbc95d4a41402c1c0da6aa3ab51af4c10 (patch)
tree8ae68aec049bfffe5fdcd725836bd31c61538fda /arch/x86/kernel/kgdb.c
parent163630191ecb0dd9e4146d3c910045aba1cfeec1 (diff)
downloadlinux-7b32aeadbc95d4a41402c1c0da6aa3ab51af4c10.tar.bz2
sched/x86: Add 'struct inactive_task_frame' to better document the sleeping task stack frame
Add 'struct inactive_task_frame', which defines the layout of the stack for a sleeping process. For now, the only defined field is the BP register (frame pointer). Signed-off-by: Brian Gerst <brgerst@gmail.com> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1471106302-10159-4-git-send-email-brgerst@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/kgdb.c')
-rw-r--r--arch/x86/kernel/kgdb.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index 5e3f294ce264..8e36f249646e 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -50,6 +50,7 @@
#include <asm/apicdef.h>
#include <asm/apic.h>
#include <asm/nmi.h>
+#include <asm/switch_to.h>
struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =
{
@@ -166,7 +167,7 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
gdb_regs[GDB_DX] = 0;
gdb_regs[GDB_SI] = 0;
gdb_regs[GDB_DI] = 0;
- gdb_regs[GDB_BP] = *(unsigned long *)p->thread.sp;
+ gdb_regs[GDB_BP] = ((struct inactive_task_frame *)p->thread.sp)->bp;
#ifdef CONFIG_X86_32
gdb_regs[GDB_DS] = __KERNEL_DS;
gdb_regs[GDB_ES] = __KERNEL_DS;