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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-06-04 15:15:44 +1000 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2007-06-14 22:29:57 +1000 |
commit | 865418d8e78b9c11c964157740b2596d6ffe9dfa (patch) | |
tree | 2ef4b1652fe38c7b9e172ca7a8aef906602d3692 /arch/powerpc/kernel/ptrace.c | |
parent | e17666ba48f78ff10162d7448e7c92d668d8faf6 (diff) | |
download | linux-865418d8e78b9c11c964157740b2596d6ffe9dfa.tar.gz linux-865418d8e78b9c11c964157740b2596d6ffe9dfa.tar.bz2 linux-865418d8e78b9c11c964157740b2596d6ffe9dfa.zip |
[POWERPC] Uninline common ptrace bits
This folds back the ptrace-common.h bits back into ptrace.c and removes
that file. The FSL SPE bits from ptrace-ppc32.h are folded back in as
well.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/ptrace.c')
-rw-r--r-- | arch/powerpc/kernel/ptrace.c | 233 |
1 files changed, 227 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 230d5f5bfab6..875bfda90b21 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -41,14 +41,235 @@ #include "ptrace-ppc32.h" #endif -#include "ptrace-common.h" - /* * does not yet catch signals sent when the child dies. * in exit.c or in signal.c. */ /* + * Get contents of register REGNO in task TASK. + */ +unsigned long ptrace_get_reg(struct task_struct *task, int regno) +{ + unsigned long tmp = 0; + + if (task->thread.regs == NULL) + return -EIO; + + if (regno == PT_MSR) { + tmp = ((unsigned long *)task->thread.regs)[PT_MSR]; + return PT_MUNGE_MSR(tmp, task); + } + + if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long))) + return ((unsigned long *)task->thread.regs)[regno]; + + return -EIO; +} + +/* + * Write contents of register REGNO in task TASK. + */ +int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data) +{ + if (task->thread.regs == NULL) + return -EIO; + + if (regno <= PT_MAX_PUT_REG) { + if (regno == PT_MSR) + data = (data & MSR_DEBUGCHANGE) + | (task->thread.regs->msr & ~MSR_DEBUGCHANGE); + ((unsigned long *)task->thread.regs)[regno] = data; + return 0; + } + return -EIO; +} + + +static int get_fpregs(void __user *data, struct task_struct *task, + int has_fpscr) +{ + unsigned int count = has_fpscr ? 33 : 32; + + if (copy_to_user(data, task->thread.fpr, count * sizeof(double))) + return -EFAULT; + return 0; +} + +static int set_fpregs(void __user *data, struct task_struct *task, + int has_fpscr) +{ + unsigned int count = has_fpscr ? 33 : 32; + + if (copy_from_user(task->thread.fpr, data, count * sizeof(double))) + return -EFAULT; + return 0; +} + + +#ifdef CONFIG_ALTIVEC +/* + * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go. + * The transfer totals 34 quadword. Quadwords 0-31 contain the + * corresponding vector registers. Quadword 32 contains the vscr as the + * last word (offset 12) within that quadword. Quadword 33 contains the + * vrsave as the first word (offset 0) within the quadword. + * + * This definition of the VMX state is compatible with the current PPC32 + * ptrace interface. This allows signal handling and ptrace to use the + * same structures. This also simplifies the implementation of a bi-arch + * (combined (32- and 64-bit) gdb. + */ + +/* + * Get contents of AltiVec register state in task TASK + */ +static int get_vrregs(unsigned long __user *data, struct task_struct *task) +{ + unsigned long regsize; + + /* copy AltiVec registers VR[0] .. VR[31] */ + regsize = 32 * sizeof(vector128); + if (copy_to_user(data, task->thread.vr, regsize)) + return -EFAULT; + data += (regsize / sizeof(unsigned long)); + + /* copy VSCR */ + regsize = 1 * sizeof(vector128); + if (copy_to_user(data, &task->thread.vscr, regsize)) + return -EFAULT; + data += (regsize / sizeof(unsigned long)); + + /* copy VRSAVE */ + if (put_user(task->thread.vrsave, (u32 __user *)data)) + return -EFAULT; + + return 0; +} + +/* + * Write contents of AltiVec register state into task TASK. + */ +static int set_vrregs(struct task_struct *task, unsigned long __user *data) +{ + unsigned long regsize; + + /* copy AltiVec registers VR[0] .. VR[31] */ + regsize = 32 * sizeof(vector128); + if (copy_from_user(task->thread.vr, data, regsize)) + return -EFAULT; + data += (regsize / sizeof(unsigned long)); + + /* copy VSCR */ + regsize = 1 * sizeof(vector128); + if (copy_from_user(&task->thread.vscr, data, regsize)) + return -EFAULT; + data += (regsize / sizeof(unsigned long)); + + /* copy VRSAVE */ + if (get_user(task->thread.vrsave, (u32 __user *)data)) + return -EFAULT; + + return 0; +} +#endif /* CONFIG_ALTIVEC */ + +#ifdef CONFIG_SPE + +/* + * For get_evrregs/set_evrregs functions 'data' has the following layout: + * + * struct { + * u32 evr[32]; + * u64 acc; + * u32 spefscr; + * } + */ + +/* + * Get contents of SPE register state in task TASK. + */ +static int get_evrregs(unsigned long *data, struct task_struct *task) +{ + int i; + + if (!access_ok(VERIFY_WRITE, data, 35 * sizeof(unsigned long))) + return -EFAULT; + + /* copy SPEFSCR */ + if (__put_user(task->thread.spefscr, &data[34])) + return -EFAULT; + + /* copy SPE registers EVR[0] .. EVR[31] */ + for (i = 0; i < 32; i++, data++) + if (__put_user(task->thread.evr[i], data)) + return -EFAULT; + + /* copy ACC */ + if (__put_user64(task->thread.acc, (unsigned long long *)data)) + return -EFAULT; + + return 0; +} + +/* + * Write contents of SPE register state into task TASK. + */ +static int set_evrregs(struct task_struct *task, unsigned long *data) +{ + int i; + + if (!access_ok(VERIFY_READ, data, 35 * sizeof(unsigned long))) + return -EFAULT; + + /* copy SPEFSCR */ + if (__get_user(task->thread.spefscr, &data[34])) + return -EFAULT; + + /* 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; + + return 0; +} +#endif /* CONFIG_SPE */ + + +static void set_single_step(struct task_struct *task) +{ + struct pt_regs *regs = task->thread.regs; + + if (regs != NULL) { +#if defined(CONFIG_40x) || defined(CONFIG_BOOKE) + task->thread.dbcr0 = DBCR0_IDM | DBCR0_IC; + regs->msr |= MSR_DE; +#else + regs->msr |= MSR_SE; +#endif + } + set_tsk_thread_flag(task, TIF_SINGLESTEP); +} + +static void clear_single_step(struct task_struct *task) +{ + struct pt_regs *regs = task->thread.regs; + + if (regs != NULL) { +#if defined(CONFIG_40x) || defined(CONFIG_BOOKE) + task->thread.dbcr0 = 0; + regs->msr &= ~MSR_DE; +#else + regs->msr &= ~MSR_SE; +#endif + } + clear_tsk_thread_flag(task, TIF_SINGLESTEP); +} + +/* * Called by kernel/ptrace.c when detaching.. * * Make sure single step bits etc are not set. @@ -154,7 +375,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) CHECK_FULL_REGS(child->thread.regs); #endif if (index < PT_FPR0) { - tmp = get_reg(child, (int) index); + tmp = ptrace_get_reg(child, (int) index); } else { flush_fp_to_thread(child); tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0]; @@ -195,7 +416,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) if (index == PT_ORIG_R3) break; if (index < PT_FPR0) { - ret = put_reg(child, index, data); + ret = ptrace_put_reg(child, index, data); } else { flush_fp_to_thread(child); ((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data; @@ -282,7 +503,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) } ret = 0; for (ui = 0; ui < PT_REGS_COUNT; ui ++) { - ret |= __put_user(get_reg(child, ui), + ret |= __put_user(ptrace_get_reg(child, ui), (unsigned long __user *) data); data += sizeof(long); } @@ -305,7 +526,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) ret = __get_user(tmp, (unsigned long __user *) data); if (ret) break; - put_reg(child, ui, tmp); + ptrace_put_reg(child, ui, tmp); data += sizeof(long); } break; |