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Commit 34dd909a authored by Todd Poynor's avatar Todd Poynor Committed by Amit Pundir
Browse files

ANDROID: ARM: kgdb: ignore breakpoint instructions from user mode 



Avoid conflicts with user mode usage of the same instructions, as with
Clang -ftrapv.

Change-Id: I12d1c6d8f94376bfd2503cb0be843d7e478fb6ea
Signed-off-by: default avatarTodd Poynor <toddpoynor@google.com>
parent 992dbb2a

arch/arm/kernel/kgdb.c

+4 −0
Original line number Diff line number Diff line
@@ -141,6 +141,8 @@ int kgdb_arch_handle_exception(int exception_vector, int signo, 


static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr)

{

	if (user_mode(regs))

		return -1;

	kgdb_handle_exception(1, SIGTRAP, 0, regs);



	return 0;
@@ -148,6 +150,8 @@ static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr) 


static int kgdb_compiled_brk_fn(struct pt_regs *regs, unsigned int instr)

{

	if (user_mode(regs))

		return -1;

	compiled_break = 1;

	kgdb_handle_exception(1, SIGTRAP, 0, regs);