Christophe Leroy bec059abef powerpc/kgdb: add kgdb_arch_set/remove_breakpoint() ... [ Upstream commit fb978ca207743badfe7efd9eebe68bcbb4969f79 ] Generic implementation fails to remove breakpoints after init when CONFIG_STRICT_KERNEL_RWX is selected: [ 13.251285] KGDB: BP remove failed: c001c338 [ 13.259587] kgdbts: ERROR PUT: end of test buffer on 'do_fork_test' line 8 expected OK got $E14#aa [ 13.268969] KGDB: re-enter exception: ALL breakpoints killed [ 13.275099] CPU: 0 PID: 1 Comm: init Not tainted 4.18.0-g82bbb913ffd8 #860 [ 13.282836] Call Trace: [ 13.285313] [c60e1ba0] [c0080ef0] kgdb_handle_exception+0x6f4/0x720 (unreliable) [ 13.292618] [c60e1c30] [c000e97c] kgdb_handle_breakpoint+0x3c/0x98 [ 13.298709] [c60e1c40] [c000af54] program_check_exception+0x104/0x700 [ 13.305083] [c60e1c60] [c000e45c] ret_from_except_full+0x0/0x4 [ 13.310845] [c60e1d20] [c02a22ac] run_simple_test+0x2b4/0x2d4 [ 13.316532] [c60e1d30] [c0081698] put_packet+0xb8/0x158 [ 13.321694] [c60e1d60] [c00820b4] gdb_serial_stub+0x230/0xc4c [ 13.327374] [c60e1dc0] [c0080af8] kgdb_handle_exception+0x2fc/0x720 [ 13.333573] [c60e1e50] [c000e928] kgdb_singlestep+0xb4/0xcc [ 13.339068] [c60e1e70] [c000ae1c] single_step_exception+0x90/0xac [ 13.345100] [c60e1e80] [c000e45c] ret_from_except_full+0x0/0x4 [ 13.350865] [c60e1f40] [c000e11c] ret_from_syscall+0x0/0x38 [ 13.356346] Kernel panic - not syncing: Recursive entry to debugger This patch creates powerpc specific version of kgdb_arch_set_breakpoint() and kgdb_arch_remove_breakpoint() using patch_instruction() Fixes: 1e0fc9d1eb ("powerpc/Kconfig: Enable STRICT_KERNEL_RWX for some configs") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-01-27 14:50:00 +01:00
..
boot	libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h	2020-01-04 19:13:15 +01:00
configs	powerpc/mm/radix: Make Radix require HUGETLB_PAGE	2019-05-02 09:58:55 +02:00
crypto	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
include	powerpc/kgdb: add kgdb_arch_set/remove_breakpoint()	2020-01-27 14:50:00 +01:00
kernel	powerpc/kgdb: add kgdb_arch_set/remove_breakpoint()	2020-01-27 14:50:00 +01:00
kvm	KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag	2020-01-09 10:19:08 +01:00
lib	powerpc/64: Fix memcmp reading past the end of src/dest	2019-04-03 06:26:29 +02:00
math-emu	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mm	powerpc: Ensure that swiotlb buffer is allocated from low memory	2020-01-12 12:17:14 +01:00
net	powerpc/bpf: Fix tail call implementation	2019-12-05 09:19:39 +01:00
oprofile	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
perf	powerpc/perf: Fix unit_sel/cache_sel checks	2019-12-05 09:20:41 +01:00
platforms	powerpc/pseries/memory-hotplug: Fix return value type of find_aa_index	2020-01-27 14:49:59 +01:00
purgatory	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
sysdev	KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag	2020-01-09 10:19:08 +01:00
tools	powerpc/tools: Don't quote $objdump in scripts	2020-01-04 19:12:42 +01:00
xmon	powerpc: Avoid clang warnings around setjmp and longjmp	2019-12-17 20:35:40 +01:00
Kconfig	powerpc: disable support for relative ksymtab references	2018-08-29 16:12:07 -07:00
Kconfig.debug	Kconfig: consolidate the "Kernel hacking" menu	2018-08-02 08:06:48 +09:00
Makefile	powerpc: Don't add -mabi= flags when building with Clang	2020-01-04 19:13:10 +01:00
Makefile.postlink	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00