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The powerpc ptrace code has some weirdness, like a ptrace-common.h file that is actually ppc64 only and some of the 32 bits code ifdef'ed inside ptrace.c. There are also separate implementations for things like get/set_vrregs for 32 and 64 bits which is totally unnecessary. This patch cleans that up a bit by having a ptrace-common.h which contains really common code (and makes a lot more code common), and ptrace-ppc32.h and ptrace-ppc64.h files that contain the few remaining different bits. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Benjamin Herrenschmidt
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Paul Mackerras
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Jun 14, 2007
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Copyright (c) 2007 Benjamin Herrenschmidt, IBM Coproration | ||
| * Extracted from ptrace.c and ptrace32.c | ||
| * | ||
| * This file is subject to the terms and conditions of the GNU General | ||
| * Public License. See the file README.legal in the main directory of | ||
| * this archive for more details. | ||
| */ | ||
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| #ifndef _POWERPC_PTRACE_PPC32_H | ||
| #define _POWERPC_PTRACE_PPC32_H | ||
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| /* | ||
| * Set of msr bits that gdb can change on behalf of a process. | ||
| */ | ||
| #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) | ||
| #define MSR_DEBUGCHANGE 0 | ||
| #else | ||
| #define MSR_DEBUGCHANGE (MSR_SE | MSR_BE) | ||
| #endif | ||
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| /* | ||
| * Max register writeable via put_reg | ||
| */ | ||
| #define PT_MAX_PUT_REG PT_MQ | ||
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| /* | ||
| * Munging of MSR on return from get_regs | ||
| * | ||
| * Nothing to do on ppc32 | ||
| */ | ||
| #define PT_MUNGE_MSR(msr, task) (msr) | ||
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| #ifdef CONFIG_SPE | ||
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| /* | ||
| * For get_evrregs/set_evrregs functions 'data' has the following layout: | ||
| * | ||
| * struct { | ||
| * u32 evr[32]; | ||
| * u64 acc; | ||
| * u32 spefscr; | ||
| * } | ||
| */ | ||
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| /* | ||
| * Get contents of SPE register state in task TASK. | ||
| */ | ||
| static inline int get_evrregs(unsigned long *data, struct task_struct *task) | ||
| { | ||
| int i; | ||
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| if (!access_ok(VERIFY_WRITE, data, 35 * sizeof(unsigned long))) | ||
| return -EFAULT; | ||
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| /* copy SPEFSCR */ | ||
| if (__put_user(task->thread.spefscr, &data[34])) | ||
| return -EFAULT; | ||
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| /* copy SPE registers EVR[0] .. EVR[31] */ | ||
| for (i = 0; i < 32; i++, data++) | ||
| if (__put_user(task->thread.evr[i], data)) | ||
| return -EFAULT; | ||
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| /* copy ACC */ | ||
| if (__put_user64(task->thread.acc, (unsigned long long *)data)) | ||
| return -EFAULT; | ||
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| return 0; | ||
| } | ||
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| /* | ||
| * Write contents of SPE register state into task TASK. | ||
| */ | ||
| static inline int set_evrregs(struct task_struct *task, unsigned long *data) | ||
| { | ||
| int i; | ||
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| if (!access_ok(VERIFY_READ, data, 35 * sizeof(unsigned long))) | ||
| return -EFAULT; | ||
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| /* copy SPEFSCR */ | ||
| if (__get_user(task->thread.spefscr, &data[34])) | ||
| return -EFAULT; | ||
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| /* copy SPE registers EVR[0] .. EVR[31] */ | ||
| for (i = 0; i < 32; i++, data++) | ||
| if (__get_user(task->thread.evr[i], data)) | ||
| return -EFAULT; | ||
| /* copy ACC */ | ||
| if (__get_user64(task->thread.acc, (unsigned long long*)data)) | ||
| return -EFAULT; | ||
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| return 0; | ||
| } | ||
| #endif /* CONFIG_SPE */ | ||
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| #endif /* _POWERPC_PTRACE_PPC32_H */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * Copyright (c) 2002 Stephen Rothwell, IBM Coproration | ||
| * Extracted from ptrace.c and ptrace32.c | ||
| * | ||
| * This file is subject to the terms and conditions of the GNU General | ||
| * Public License. See the file README.legal in the main directory of | ||
| * this archive for more details. | ||
| */ | ||
|
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| #ifndef _POWERPC_PTRACE_PPC64_H | ||
| #define _POWERPC_PTRACE_PPC64_H | ||
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| /* | ||
| * Set of msr bits that gdb can change on behalf of a process. | ||
| */ | ||
| #define MSR_DEBUGCHANGE (MSR_FE0 | MSR_SE | MSR_BE | MSR_FE1) | ||
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| /* | ||
| * Max register writeable via put_reg | ||
| */ | ||
| #define PT_MAX_PUT_REG PT_CCR | ||
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| /* | ||
| * Munging of MSR on return from get_regs | ||
| * | ||
| * Put the correct FP bits in, they might be wrong as a result | ||
| * of our lazy FP restore. | ||
| */ | ||
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| #define PT_MUNGE_MSR(msr, task) ({ (msr) | (task)->thread.fpexc_mode; }) | ||
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| static inline int ptrace_set_debugreg(struct task_struct *task, | ||
| unsigned long addr, unsigned long data) | ||
| { | ||
| /* We only support one DABR and no IABRS at the moment */ | ||
| if (addr > 0) | ||
| return -EINVAL; | ||
|
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| /* The bottom 3 bits are flags */ | ||
| if ((data & ~0x7UL) >= TASK_SIZE) | ||
| return -EIO; | ||
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| /* Ensure translation is on */ | ||
| if (data && !(data & DABR_TRANSLATION)) | ||
| return -EIO; | ||
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| task->thread.dabr = data; | ||
| return 0; | ||
| } | ||
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| #endif /* _POWERPC_PTRACE_PPC64_H */ |
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