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Commit 0c23590f authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Ingo Molnar
Browse files

x86, 64-bit: ifdef out struct thread_struct::ip 



struct thread_struct::ip isn't used on x86_64, struct pt_regs::ip is used
instead.

kgdb should be reading 0 always, but I can't check it.

[ Impact: (potentially) reduce thread_struct size on 64-bit ]

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Cc: containers@lists.linux-foundation.org
LKML-Reference: <20090503233015.GJ16631@x200.localdomain>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d756f4ad

arch/x86/include/asm/processor.h

+2 −0
Original line number Diff line number Diff line
@@ -427,7 +427,9 @@ struct thread_struct { 
	unsigned short		fsindex;

	unsigned short		gsindex;

#endif

#ifdef CONFIG_X86_32

	unsigned long		ip;

#endif

#ifdef CONFIG_X86_64

	unsigned long		fs;

#endif

arch/x86/kernel/kgdb.c

+1 −1
Original line number Diff line number Diff line
@@ -141,7 +141,7 @@ 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]	= p->thread.ip;

	gdb_regs[GDB_PC]	= 0;

	gdb_regs[GDB_R8]	= 0;

	gdb_regs[GDB_R9]	= 0;

	gdb_regs[GDB_R10]	= 0;