diff options
author | Roland McGrath <roland@redhat.com> | 2007-12-20 03:59:04 -0800 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2008-02-07 20:40:21 +1100 |
commit | 0deef2c7ab9dcf82f6ad26fc2fca358cd56c9cb9 (patch) | |
tree | 00e0b016d28ec2f4d717196fb43b0f70fcce5a69 /arch | |
parent | 81e695c026eeda9a97e412fa4f458e5cab2f6c85 (diff) |
[POWERPC] Use regset code for compat PTRACE_*REGS* calls
This cleans up the 32-bit ptrace syscall support to use user_regset calls
to get at the register data for PTRACE_*REGS* calls.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/kernel/ptrace32.c | 96 |
1 files changed, 25 insertions, 71 deletions
diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c index 0f6eea086a23..4c1de6af4c09 100644 --- a/arch/powerpc/kernel/ptrace32.c +++ b/arch/powerpc/kernel/ptrace32.c @@ -24,6 +24,7 @@ #include <linux/smp_lock.h> #include <linux/errno.h> #include <linux/ptrace.h> +#include <linux/regset.h> #include <linux/user.h> #include <linux/security.h> #include <linux/signal.h> @@ -46,43 +47,21 @@ static long compat_ptrace_old(struct task_struct *child, long request, long addr, long data) { - int ret = -EPERM; - - switch(request) { - case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */ - int i; - unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; - unsigned int __user *tmp = (unsigned int __user *)addr; - - CHECK_FULL_REGS(child->thread.regs); - for (i = 0; i < 32; i++) { - ret = put_user(*reg, tmp); - if (ret) - break; - reg++; - tmp++; - } - break; - } - - case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */ - int i; - unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; - unsigned int __user *tmp = (unsigned int __user *)addr; - - CHECK_FULL_REGS(child->thread.regs); - for (i = 0; i < 32; i++) { - ret = get_user(*reg, tmp); - if (ret) - break; - reg++; - tmp++; - } - break; + switch (request) { + case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */ + return copy_regset_to_user(child, + task_user_regset_view(current), 0, + 0, 32 * sizeof(compat_long_t), + compat_ptr(data)); + + case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */ + return copy_regset_from_user(child, + task_user_regset_view(current), 0, + 0, 32 * sizeof(compat_long_t), + compat_ptr(data)); } - } - return ret; + return -EPERM; } long compat_arch_ptrace(struct task_struct *child, compat_long_t request, @@ -291,42 +270,17 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, break; } - case PTRACE_GETREGS: { /* Get all pt_regs from the child. */ - int ui; - if (!access_ok(VERIFY_WRITE, (void __user *)data, - PT_REGS_COUNT * sizeof(int))) { - ret = -EIO; - break; - } - CHECK_FULL_REGS(child->thread.regs); - ret = 0; - for (ui = 0; ui < PT_REGS_COUNT; ui ++) { - ret |= __put_user(ptrace_get_reg(child, ui), - (unsigned int __user *) data); - data += sizeof(int); - } - break; - } - - case PTRACE_SETREGS: { /* Set all gp regs in the child. */ - unsigned long tmp; - int ui; - if (!access_ok(VERIFY_READ, (void __user *)data, - PT_REGS_COUNT * sizeof(int))) { - ret = -EIO; - break; - } - CHECK_FULL_REGS(child->thread.regs); - ret = 0; - for (ui = 0; ui < PT_REGS_COUNT; ui ++) { - ret = __get_user(tmp, (unsigned int __user *) data); - if (ret) - break; - ptrace_put_reg(child, ui, tmp); - data += sizeof(int); - } - break; - } + case PTRACE_GETREGS: /* Get all pt_regs from the child. */ + return copy_regset_to_user( + child, task_user_regset_view(current), 0, + 0, PT_REGS_COUNT * sizeof(compat_long_t), + compat_ptr(data)); + + case PTRACE_SETREGS: /* Set all gp regs in the child. */ + return copy_regset_from_user( + child, task_user_regset_view(current), 0, + 0, PT_REGS_COUNT * sizeof(compat_long_t), + compat_ptr(data)); case PTRACE_GETFPREGS: case PTRACE_SETFPREGS: |