diff options
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/kernel/ptrace.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c index ce0b2b4075c7..c62522bda2db 100644 --- a/arch/parisc/kernel/ptrace.c +++ b/arch/parisc/kernel/ptrace.c @@ -156,6 +156,9 @@ long arch_ptrace(struct task_struct *child, long request, if ((addr & (sizeof(unsigned long)-1)) || addr >= sizeof(struct pt_regs)) break; + if (addr == PT_IAOQ0 || addr == PT_IAOQ1) { + data |= 3; /* ensure userspace privilege */ + } if ((addr >= PT_GR1 && addr <= PT_GR31) || addr == PT_IAOQ0 || addr == PT_IAOQ1 || (addr >= PT_FR0 && addr <= PT_FR31 + 4) || @@ -189,16 +192,18 @@ long arch_ptrace(struct task_struct *child, long request, static compat_ulong_t translate_usr_offset(compat_ulong_t offset) { - if (offset < 0) - return sizeof(struct pt_regs); - else if (offset <= 32*4) /* gr[0..31] */ - return offset * 2 + 4; - else if (offset <= 32*4+32*8) /* gr[0..31] + fr[0..31] */ - return offset + 32*4; - else if (offset < sizeof(struct pt_regs)/2 + 32*4) - return offset * 2 + 4 - 32*8; + compat_ulong_t pos; + + if (offset < 32*4) /* gr[0..31] */ + pos = offset * 2 + 4; + else if (offset < 32*4+32*8) /* fr[0] ... fr[31] */ + pos = (offset - 32*4) + PT_FR0; + else if (offset < sizeof(struct pt_regs)/2 + 32*4) /* sr[0] ... ipsw */ + pos = (offset - 32*4 - 32*8) * 2 + PT_SR0 + 4; else - return sizeof(struct pt_regs); + pos = sizeof(struct pt_regs); + + return pos; } long compat_arch_ptrace(struct task_struct *child, compat_long_t request, @@ -242,9 +247,12 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, addr = translate_usr_offset(addr); if (addr >= sizeof(struct pt_regs)) break; + if (addr == PT_IAOQ0+4 || addr == PT_IAOQ1+4) { + data |= 3; /* ensure userspace privilege */ + } if (addr >= PT_FR0 && addr <= PT_FR31 + 4) { /* Special case, fp regs are 64 bits anyway */ - *(__u64 *) ((char *) task_regs(child) + addr) = data; + *(__u32 *) ((char *) task_regs(child) + addr) = data; ret = 0; } else if ((addr >= PT_GR1+4 && addr <= PT_GR31+4) || |