Bug 19958

Summary:	Breakpoints/watchpoints broken on MIPS Linux <= 4.5
Product:	gdb	Reporter:	Pedro Alves <pedro>
Component:	gdb	Assignee:	Pedro Alves <pedro>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	P2
Version:	7.10
Target Milestone:	7.11.1
Host:		Target:
Build:		Last reconfirmed:

Description Pedro Alves 2016-04-15 23:15:32 UTC

Ref: https://sourceware.org/ml/gdb-patches/2016-02/msg00681.html
    
MIPS Linux <= 4.5 reports SI_KERNEL for all kernel generated traps, instead of TRAP_BRKPT / TRAP_HWBKPT, but GDB isn't aware of this.

The result is that hardware watchpoints are broken and pending/delayed breakpoint events mishandling cause gdb to sometimes report spurious SIGTRAPs.

MIPS Linux 4.6 has been corrected to report the proper TRAP_BRKPT / TRAP_HWBKPT si_codes.

Comment 1 Pedro Alves 2016-04-15 23:19:35 UTC

MIPS GDB has been taught to handle SI_KERNEL traps.

Fix pushed to master and 7.11 branch:

 https://sourceware.org/ml/gdb-patches/2016-04/msg00371.html