Blackfin arch: fix bug when sending signals with the wrong PC, cause gdb get confused (fb322915) · Commits · 戴 / test

We need to send signals with the proper PC, or gdb gets confused, and lots of tests fail. This should fix that. Signed-off-by:

arch/blackfin/kernel/traps.c

+8 −6

Original line number	Diff line number	Diff line
		@@ -463,18 +463,20 @@ asmlinkage void trap_c(struct pt_regs *fp)
		#endif
		panic("Kernel exception");
		}

		/* Ensure that bad return addresses don't end up in an infinite
		* loop, due to speculative loads/reads
		*/
		if (trapnr == VEC_CPLB_I_M)
		fp->pc = SAFE_USER_INSTRUCTION;
		}

		info.si_signo = sig;
		info.si_errno = 0;
		info.si_addr = (void *)fp->pc;
		force_sig_info(sig, &info, current);

		/* Ensure that bad return addresses don't end up in an infinite
		* loop, due to speculative loads/reads. This needs to be done after
		* the signal has been sent.
		*/
		if (trapnr == VEC_CPLB_I_M && sig != SIGTRAP)
		fp->pc = SAFE_USER_INSTRUCTION;

		trace_buffer_restore(j);
		return;
		}