kernel.git/arch/powerpc/kernel/ptrace.c, branch linux-2.6.28.y

powerpc: Don't use the wrong thread_struct for ptrace get/set VSX regs

2008-07-30T05:26:54Z

In PTRACE_GET/SETVSRREGS, we should be using the thread we are ptracing rather than current. Signed-off-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix ptrace buffer size for VSX

2008-07-30T05:26:54Z

Fix cut-and-paste error in the size setting for ptrace buffers for VSX. Signed-off-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt

powerpc: Make syscall tracing use tracehook.h helpers

2008-07-28T06:30:49Z

This changes powerpc syscall tracing to use the new tracehook.h entry points. There is no change, only cleanup. In addition, the assembly changes allow do_syscall_trace_enter() to abort the syscall without losing the information about the original r0 value. Signed-off-by: Roland McGrath Signed-off-by: Benjamin Herrenschmidt

powerpc/booke: Clean up the hardware watchpoint support

2008-07-28T06:30:47Z

* CONFIG_BOOKE is selected by CONFIG_44x so we dont need both * Fixed a few comments * Go back to only using DBCR0_IDM to determine if we are using debug resources. Signed-off-by: Kumar Gala Signed-off-by: Benjamin Herrenschmidt

powerpc: BookE hardware watchpoint support

2008-07-25T05:44:39Z

This patch implements support for HW based watchpoint via the DBSR_DAC (Data Address Compare) facility of the BookE processors. It does so by interfacing with the existing DABR breakpoint code and adding the necessary bits and pieces for the new bits to be properly set or cleared Signed-off-by: Luis Machado Signed-off-by: Benjamin Herrenschmidt

powerpc: Update for VSX core file and ptrace

2008-07-01T04:47:09Z

This correctly hooks the VSX dump into Roland McGrath core file infrastructure. It adds the VSX dump information as an additional elf note in the core file (after talking more to the tool chain/gdb guys). This also ensures the formats are consistent between signals, ptrace and core files. Signed-off-by: Michael Neuling Signed-off-by: Paul Mackerras

powerpc: Add VSX context save/restore, ptrace and signal support

2008-07-01T01:28:50Z

This patch extends the floating point save and restore code to use the VSX load/stores when VSX is available. This will make FP context save/restore marginally slower on FP only code, when VSX is available, as it has to load/store 128bits rather than just 64bits. Mixing FP, VMX and VSX code will get constant architected state. The signals interface is extended to enable access to VSR 0-31 doubleword 1 after discussions with tool chain maintainers. Backward compatibility is maintained. The ptrace interface is also extended to allow access to VSR 0-31 full registers. Signed-off-by: Michael Neuling Signed-off-by: Paul Mackerras

powerpc: Introduce VSX thread_struct and CONFIG_VSX

2008-07-01T01:28:46Z

The layout of the new VSR registers and how they overlap on top of the legacy FPR and VR registers is: VSR doubleword 0 VSR doubleword 1 ---------------------------------------------------------------- VSR[0] | FPR[0] | | ---------------------------------------------------------------- VSR[1] | FPR[1] | | ---------------------------------------------------------------- | ... | | | ... | | ---------------------------------------------------------------- VSR[30] | FPR[30] | | ---------------------------------------------------------------- VSR[31] | FPR[31] | | ---------------------------------------------------------------- VSR[32] | VR[0] | ---------------------------------------------------------------- VSR[33] | VR[1] | ---------------------------------------------------------------- | ... | | ... | ---------------------------------------------------------------- VSR[62] | VR[30] | ---------------------------------------------------------------- VSR[63] | VR[31] | ---------------------------------------------------------------- VSX has 64 128bit registers. The first 32 regs overlap with the FP registers and hence extend them with and additional 64 bits. The second 32 regs overlap with the VMX registers. This commit introduces the thread_struct changes required to reflect this register layout. Ptrace and signals code is updated so that the floating point registers are correctly accessed from the thread_struct when CONFIG_VSX is enabled. Signed-off-by: Michael Neuling Signed-off-by: Paul Mackerras

powerpc: Add macros to access floating point registers in thread_struct.

2008-07-01T01:28:43Z

We are going to change where the floating point registers are stored in the thread_struct, so in preparation add some macros to access the floating point registers. Update all code to use these new macros. Signed-off-by: Michael Neuling Signed-off-by: Paul Mackerras

[POWERPC] user_regset PTRACE_SETREGS regression fix

2008-03-19T23:10:56Z

The PTRACE_SETREGS request was only recently added on powerpc, and gdb does not use it. So it slipped through without getting all the testing it should have had. The user_regset changes had a simple bug in storing to all of the 32-bit general registers block on 64-bit kernels. This bug only comes up with PTRACE_SETREGS, not PPC_PTRACE_SETREGS. It causes a BUG_ON to hit, so this fix needs to go in ASAP. Signed-off-by: Roland McGrath Signed-off-by: Paul Mackerras