Daniel Thompson 0d15ef6778 arm64: kgdb: Match pstate size with gdbserver protocol ... Current versions of gdb do not interoperate cleanly with kgdb on arm64 systems because gdb and kgdb do not use the same register description. This patch modifies kgdb to work with recent releases of gdb (>= 7.8.1). Compatibility with gdb (after the patch is applied) is as follows: gdb-7.6 and earlier Ok gdb-7.7 series Works if user provides custom target description gdb-7.8(.0) Works if user provides custom target description gdb-7.8.1 and later Ok When commit 44679a4f14 ("arm64: KGDB: Add step debugging support") was introduced it was paired with a gdb patch that made an incompatible change to the gdbserver protocol. This patch was eventually merged into the gdb sources: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=a4d9ba85ec5597a6a556afe26b712e878374b9dd The change to the protocol was mostly made to simplify big-endian support inside the kernel gdb stub. Unfortunately the gdb project released gdb-7.7.x and gdb-7.8.0 before the protocol incompatibility was identified and reversed: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=bdc144174bcb11e808b4e73089b850cf9620a7ee This leaves us in a position where kgdb still uses the no-longer-used protocol; gdb-7.8.1, which restored the original behaviour, was released on 2014-10-29. I don't believe it is possible to detect/correct the protocol incompatiblity which means the kernel must take a view about which version of the gdb remote protocol is "correct". This patch takes the view that the original/current version of the protocol is correct and that version found in gdb-7.7.x and gdb-7.8.0 is anomalous. Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>		2016-06-16 19:20:51 +01:00
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boot	ARM: SoC: late DT updates for v4.7	2016-05-24 15:46:06 -07:00
configs	Merge git://www.linux-watchdog.org/linux-watchdog	2016-05-25 10:19:17 -07:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-03-17 11:22:54 -07:00
include	arm64: kgdb: Match pstate size with gdbserver protocol	2016-06-16 19:20:51 +01:00
kernel	arm64: kgdb: Match pstate size with gdbserver protocol	2016-06-16 19:20:51 +01:00
kvm	arm64: KVM: vgic-v3: Relax synchronization when SRE==1	2016-05-31 16:12:17 +02:00
lib	arm64 updates for 4.6:	2016-03-17 20:03:47 -07:00
mm	arm64: mm: mark fault_info table const	2016-06-14 15:02:34 +01:00
net	bpf: arm64: remove callee-save registers use for tmp registers	2016-05-17 14:03:33 -04:00
xen	xen/arm: introduce HYPERVISOR_platform_op on arm and arm64	2015-12-21 14:40:56 +00:00
Kconfig	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-06-03 16:12:35 -07:00
Kconfig.debug	arm64: enable CONFIG_SET_MODULE_RONX by default	2016-05-31 14:23:29 +01:00
Kconfig.platforms	ARM: SoC 64-bit changes for v4.7	2016-05-18 12:43:08 -07:00
Makefile	arm64: fix alignment when RANDOMIZE_TEXT_OFFSET is enabled	2016-06-03 10:57:18 +01:00