Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [RFC PATCH 24/43] ptrace, m68knommu: cleanup arch_ptrace() | Date | Fri, 27 Aug 2010 18:42:10 +0900 |
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use new regno, datap variables in order to remove duplicated expressions and unnecessary castings. Also some coding style fixes are included.
Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Greg Ungerer <gerg@uclinux.org> --- arch/m68knommu/kernel/ptrace.c | 59 +++++++++++++++++++++------------------- 1 files changed, 31 insertions(+), 28 deletions(-)
diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c index 835a3ed..7f23775 100644 --- a/arch/m68knommu/kernel/ptrace.c +++ b/arch/m68knommu/kernel/ptrace.c @@ -115,6 +115,8 @@ long arch_ptrace(struct task_struct *child, long request, unsigned long addr, unsigned long data) { int ret; + int regno = addr >> 2; /* temporary hack. */ + unsigned long __user *datap = (unsigned long __user *) data; switch (request) { /* read the word at location addr in the USER area. */ @@ -126,59 +128,60 @@ long arch_ptrace(struct task_struct *child, long request, break; tmp = 0; /* Default return condition */ - addr = addr >> 2; /* temporary hack. */ ret = -EIO; - if (addr < 19) { - tmp = get_reg(child, addr); + if (regno < 19) { + tmp = get_reg(child, regno); if (addr == PT_SR) tmp >>= 16; - } else if (addr >= 21 && addr < 49) { - tmp = child->thread.fp[addr - 21]; + } else if (regno >= 21 && regno < 49) { + tmp = child->thread.fp[regno - 21]; #ifdef CONFIG_M68KFPU_EMU /* Convert internal fpu reg representation * into long double format */ - if (FPU_IS_EMU && (addr < 45) && !(addr % 3)) + if (FPU_IS_EMU && (regno < 45) && + !(regno % 3)) tmp = ((tmp & 0xffff0000) << 15) | ((tmp & 0x0000ffff) << 16); #endif - } else if (addr == 49) { + } else if (regno == 49) { tmp = child->mm->start_code; - } else if (addr == 50) { + } else if (regno == 50) { tmp = child->mm->start_data; - } else if (addr == 51) { + } else if (regno == 51) { tmp = child->mm->end_code; } else break; - ret = put_user(tmp,(unsigned long *) data); + ret = put_user(tmp, datap); break; } - case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ + case PTRACE_POKEUSR: + /* write the word at location addr in the USER area */ ret = -EIO; if ((addr & 3) || addr > sizeof(struct user) - 3) break; - addr = addr >> 2; /* temporary hack. */ - - if (addr == PT_SR) { + if (regno == PT_SR) { data &= SR_MASK; data <<= 16; - data |= get_reg(child, PT_SR) & ~(SR_MASK << 16); + data |= get_reg(child, PT_SR) & + ~(SR_MASK << 16); } - if (addr < 19) { - if (put_reg(child, addr, data)) + if (regno < 19) { + if (put_reg(child, regno, data)) break; ret = 0; break; } - if (addr >= 21 && addr < 48) + if (regno >= 21 && regno < 48) { #ifdef CONFIG_M68KFPU_EMU /* Convert long double format * into internal fpu reg representation */ - if (FPU_IS_EMU && (addr < 45) && !(addr % 3)) { + if (FPU_IS_EMU && (regno < 45) && + !(regno % 3)) { data <<= 15; data = (data & 0xffff0000) | ((data & 0x0000ffff) >> 1); @@ -196,11 +199,11 @@ long arch_ptrace(struct task_struct *child, long request, tmp = get_reg(child, i); if (i == PT_SR) tmp >>= 16; - if (put_user(tmp, (unsigned long *) data)) { + if (put_user(tmp, datap)) { ret = -EFAULT; break; } - data += sizeof(unsigned long); + datap++; } ret = 0; break; @@ -210,17 +213,18 @@ long arch_ptrace(struct task_struct *child, long request, int i; unsigned long tmp; for (i = 0; i < 19; i++) { - if (get_user(tmp, (unsigned long *) data)) { + if (get_user(tmp, datap)) { ret = -EFAULT; break; } if (i == PT_SR) { tmp &= SR_MASK; tmp <<= 16; - tmp |= get_reg(child, PT_SR) & ~(SR_MASK << 16); + tmp |= get_reg(child, PT_SR) & + ~(SR_MASK << 16); } put_reg(child, i, tmp); - data += sizeof(unsigned long); + datap++; } ret = 0; break; @@ -229,7 +233,7 @@ long arch_ptrace(struct task_struct *child, long request, #ifdef PTRACE_GETFPREGS case PTRACE_GETFPREGS: { /* Get the child FPU state. */ ret = 0; - if (copy_to_user((void *)data, &child->thread.fp, + if (copy_to_user(datap, &child->thread.fp, sizeof(struct user_m68kfp_struct))) ret = -EFAULT; break; @@ -239,7 +243,7 @@ long arch_ptrace(struct task_struct *child, long request, #ifdef PTRACE_SETFPREGS case PTRACE_SETFPREGS: { /* Set the child FPU state. */ ret = 0; - if (copy_from_user(&child->thread.fp, (void *)data, + if (copy_from_user(&child->thread.fp, datap, sizeof(struct user_m68kfp_struct))) ret = -EFAULT; break; @@ -247,8 +251,7 @@ long arch_ptrace(struct task_struct *child, long request, #endif case PTRACE_GET_THREAD_AREA: - ret = put_user(task_thread_info(child)->tp_value, - (unsigned long __user *)data); + ret = put_user(task_thread_info(child)->tp_value, datap); break; default: -- 1.7.2.2
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