From 1715a826a5b72d4fb882504d0babcea9aec8a0db Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Thu, 10 Jan 2013 20:29:09 +0000 Subject: powerpc: Add DSCR support to ptrace The DSCR (aka Data Stream Control Register) is supported on some server PowerPC chips and allow some control over the prefetch of data streams. The kernel already supports DSCR value per thread but there is also a need in a ability to change it from an external process for the specific pid. The patch adds new register index PT_DSCR (index=44) which can be set/get by: ptrace(PTRACE_POKEUSER, traced_process, PT_DSCR << 3, dscr); dscr = ptrace(PTRACE_PEEKUSER, traced_process, PT_DSCR << 3, NULL); The patch does not increase PT_REGS_COUNT as the pt_regs struct has not been changed. Signed-off-by: Alexey Kardashevskiy Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/uapi/asm/ptrace.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/include/uapi') diff --git a/arch/powerpc/include/uapi/asm/ptrace.h b/arch/powerpc/include/uapi/asm/ptrace.h index ee67a2bc91bb..5a4863c76b5f 100644 --- a/arch/powerpc/include/uapi/asm/ptrace.h +++ b/arch/powerpc/include/uapi/asm/ptrace.h @@ -108,6 +108,7 @@ struct pt_regs { #define PT_DAR 41 #define PT_DSISR 42 #define PT_RESULT 43 +#define PT_DSCR 44 #define PT_REGS_COUNT 44 #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ -- cgit v1.2.1 From 145c52d5ce304f93e15f6a0b4471b2ffae37b3a8 Mon Sep 17 00:00:00 2001 From: Michael Neuling Date: Tue, 8 Jan 2013 18:45:36 +0000 Subject: powerpc/ptrace: Make #defines for all request numbers hex We have a mix of decimal and hex here, so lets make them consistently hex. Also, strace will print them in hex if it can't decode them, so having them in hex here makes it easier to match up. No functional change. Signed-off-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/uapi/asm/ptrace.h | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) (limited to 'arch/powerpc/include/uapi') diff --git a/arch/powerpc/include/uapi/asm/ptrace.h b/arch/powerpc/include/uapi/asm/ptrace.h index 5a4863c76b5f..66b9ca4ee94a 100644 --- a/arch/powerpc/include/uapi/asm/ptrace.h +++ b/arch/powerpc/include/uapi/asm/ptrace.h @@ -147,34 +147,34 @@ struct pt_regs { * structures. This also simplifies the implementation of a bi-arch * (combined (32- and 64-bit) gdb. */ -#define PTRACE_GETVRREGS 18 -#define PTRACE_SETVRREGS 19 +#define PTRACE_GETVRREGS 0x12 +#define PTRACE_SETVRREGS 0x13 /* Get/set all the upper 32-bits of the SPE registers, accumulator, and * spefscr, in one go */ -#define PTRACE_GETEVRREGS 20 -#define PTRACE_SETEVRREGS 21 +#define PTRACE_GETEVRREGS 0x14 +#define PTRACE_SETEVRREGS 0x15 /* Get the first 32 128bit VSX registers */ -#define PTRACE_GETVSRREGS 27 -#define PTRACE_SETVSRREGS 28 +#define PTRACE_GETVSRREGS 0x1b +#define PTRACE_SETVSRREGS 0x1c /* * Get or set a debug register. The first 16 are DABR registers and the * second 16 are IABR registers. */ -#define PTRACE_GET_DEBUGREG 25 -#define PTRACE_SET_DEBUGREG 26 +#define PTRACE_GET_DEBUGREG 0x19 +#define PTRACE_SET_DEBUGREG 0x1a /* (new) PTRACE requests using the same numbers as x86 and the same * argument ordering. Additionally, they support more registers too */ -#define PTRACE_GETREGS 12 -#define PTRACE_SETREGS 13 -#define PTRACE_GETFPREGS 14 -#define PTRACE_SETFPREGS 15 -#define PTRACE_GETREGS64 22 -#define PTRACE_SETREGS64 23 +#define PTRACE_GETREGS 0xc +#define PTRACE_SETREGS 0xd +#define PTRACE_GETFPREGS 0xe +#define PTRACE_SETFPREGS 0xf +#define PTRACE_GETREGS64 0x16 +#define PTRACE_SETREGS64 0x17 /* Calls to trace a 64bit program from a 32bit program */ #define PPC_PTRACE_PEEKTEXT_3264 0x95 -- cgit v1.2.1