kernel.git/arch/x86/kernel/kgdb.c, branch linux-2.6.30.y

kgdb,i386: use address that SP register points to in the exception frame

2009-05-15T12:56:25Z

The treatment of the SP register is different on x86_64 and i386. This is a regression fix that lived outside the mainline kernel from 2.6.27 to now. The regression was a result of the original merge consolidation of the i386 and x86_64 archs to x86. The incorrectly reported SP on i386 prevented stack tracebacks from working correctly in gdb. Signed-off-by: Jason Wessel

x86, apic: remove genapic.h

2009-02-17T16:52:44Z

Impact: cleanup Remove genapic.h and remove all references to it. Signed-off-by: Ingo Molnar

x86, smp: remove mach_ipi.h

2009-01-29T13:16:49Z

Move mach_ipi.h definitions into genapic.h. Signed-off-by: Ingo Molnar

x86, apic: untangle the send_IPI_*() jungle

2009-01-28T22:20:31Z

Our send_IPI_*() methods and definitions are a twisted mess: the same symbol is defined to different things depending on .config details, in a non-transparent way. - spread out the quirks into separately named per apic driver methods - prefix the standard PC methods with default_ - get rid of wrapper macro obfuscation - clean up various details Signed-off-by: Ingo Molnar

kgdb, x86: Avoid invoking kgdb_nmicallback twice per NMI

2008-10-06T18:50:59Z

Stress-testing KVM's latest NMI support with kgdbts inside an SMP guest, I came across spurious unhandled NMIs while running the singlestep test. Looking closer at the code path each NMI takes when KGDB is enabled, I noticed that kgdb_nmicallback is called twice per event: One time via DIE_NMI_IPI notification, the second time on DIE_NMI. Removing the first invocation cures the unhandled NMIs here. Signed-off-by: Jan Kiszka Signed-off-by: Jason Wessel

kgdb, x86_64: fix PS CS SS registers in gdb serial

2008-09-26T15:36:42Z

On x86_64 the gdb serial register structure defines the PS (also known as eflags), CS and SS registers as 4 bytes entities. This patch splits the x86_64 regnames enum into a 32 and 64 version to account for the 32 bit entities in the gdb serial packets. Also the program counter is properly filled in for the sleeping threads. Signed-off-by: Jason Wessel

kgdb, x86, arm, mips, powerpc: ignore user space single stepping

2008-09-26T15:36:41Z

On the x86 arch, user space single step exceptions should be ignored if they occur in the kernel space, such as ptrace stepping through a system call. First check if it is kgdb that is executing a single step, then ensure it is not an accidental traversal into the user space, while in kgdb, any other time the TIF_SINGLESTEP is set, kgdb should ignore the exception. On x86, arm, mips and powerpc, the kgdb_contthread usage was inconsistent with the way single stepping is implemented in the kgdb core. The arch specific stub should always set the kgdb_cpu_doing_single_step correctly if it is single stepping. This allows kgdb to correctly process an instruction steps if ptrace happens to be requesting an instruction step over a system call. Signed-off-by: Jason Wessel

x86: KGDB build fix

2008-04-19T17:19:54Z

Signed-off-by: Ingo Molnar

x86: kgdb build fix

2008-04-18T17:02:12Z

TF_MASK is no longer defined, use X86_EFLAGS_TF. Signed-off-by: Harvey Harrison Signed-off-by: Linus Torvalds

kgdb: fix several kgdb regressions

2008-04-17T18:05:40Z

kgdb core fixes: - Check to see that mm->mmap_cache is not null before calling flush_cache_range(), else on arch=ARM it will cause a fatal fault. - Breakpoints should only be restored if they are in the BP_ACTIVE state. - Fix a typo in comments to "kgdb_register_io_module" x86 kgdb fixes: - Fix the x86 arch handler such that on a kill or detach that the appropriate cleanup on the single stepping flags gets run. - Add in the DIE_NMIWATCHDOG call for x86_64 - Touch the nmi watchdog before returning the system to normal operation after performing any kind of kgdb operation, else the possibility exists to trigger the watchdog. Signed-off-by: Jason Wessel Signed-off-by: Ingo Molnar