kernel_samsung_sm7125

jenna

History

Vineet Gupta 5b24282846 ARC: Ignore ptrace SETREGSET request for synthetic register "stop_pc" ARCompact TRAP_S insn used for breakpoints, commits before exception is taken (updating architectural PC). So ptregs->ret contains next-PC and not the breakpoint PC itself. This is different from other restartable exceptions such as TLB Miss where ptregs->ret has exact faulting PC. gdb needs to know exact-PC hence ARC ptrace GETREGSET provides for @stop_pc which returns ptregs->ret vs. EFA depending on the situation. However, writing stop_pc (SETREGSET request), which updates ptregs->ret doesn't makes sense stop_pc doesn't always correspond to that reg as described above. This was not an issue so far since user_regs->ret / user_regs->stop_pc had same value and both writing to ptregs->ret was OK, needless, but NOT broken, hence not observed. With gdb "jump", they diverge, and user_regs->ret updating ptregs is overwritten immediately with stop_pc, which this patch fixes. Reported-by: Anton Kolesov <akolesov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>		11 years ago
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boot	ARC: Add some .gitignore entries	12 years ago
configs	Couple of Platform updates (Device Tree files primarily) given that the	12 years ago
include	ARC: Workaround spinlock livelock in SMP SystemC simulation	12 years ago
kernel	ARC: Ignore ptrace SETREGSET request for synthetic register "stop_pc"	11 years ago
lib	ARC: [lib] strchr breakage in Big-endian configuration	12 years ago
mm	arch: mm: pass userspace fault flag to generic fault handler	12 years ago
oprofile	…
plat-arcfpga	Couple of Platform updates (Device Tree files primarily) given that the	12 years ago
plat-tb10x	ARC: [TB10x] Updates for irqchip driver	12 years ago
Kbuild	…
Kconfig	Remove GENERIC_HARDIRQ config option	12 years ago
Kconfig.debug	consolidate per-arch stack overflow debugging options	12 years ago
Makefile	ARC: Adjustments for gcc 4.8	12 years ago