diff options
Diffstat (limited to 'arch/s390/kernel/ptrace.c')
| -rw-r--r-- | arch/s390/kernel/ptrace.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index 3519c99ae0c0..41e20763886e 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -169,8 +169,9 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr) */ tmp = *(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr); if (addr == (addr_t) &dummy->regs.psw.mask) - /* Remove per bit from user psw. */ - tmp &= ~PSW_MASK_PER; + /* Return a clean psw mask. */ + tmp = psw_user_bits | (tmp & PSW_MASK_USER) | + PSW_MASK_EA | PSW_MASK_BA; } else if (addr < (addr_t) &dummy->regs.orig_gpr2) { /* @@ -285,17 +286,18 @@ static inline void __poke_user_per(struct task_struct *child, static int __poke_user(struct task_struct *child, addr_t addr, addr_t data) { struct user *dummy = NULL; - addr_t offset; + addr_t offset, tmp; if (addr < (addr_t) &dummy->regs.acrs) { /* * psw and gprs are stored on the stack */ + tmp = (data & ~PSW_MASK_USER) ^ psw_user_bits; if (addr == (addr_t) &dummy->regs.psw.mask && #ifdef CONFIG_COMPAT - data != PSW_MASK_MERGE(psw_user32_bits, data) && + tmp != PSW_MASK_BA && #endif - data != PSW_MASK_MERGE(psw_user_bits, data)) + tmp != (PSW_MASK_EA | PSW_MASK_BA)) /* Invalid psw mask. */ return -EINVAL; #ifndef CONFIG_64BIT @@ -505,21 +507,20 @@ static u32 __peek_user_compat(struct task_struct *child, addr_t addr) __u32 tmp; if (addr < (addr_t) &dummy32->regs.acrs) { + struct pt_regs *regs = task_pt_regs(child); /* * psw and gprs are stored on the stack */ if (addr == (addr_t) &dummy32->regs.psw.mask) { /* Fake a 31 bit psw mask. */ - tmp = (__u32)(task_pt_regs(child)->psw.mask >> 32); - tmp = PSW32_MASK_MERGE(psw32_user_bits, tmp); + tmp = (__u32)(regs->psw.mask >> 32); + tmp = psw32_user_bits | (tmp & PSW32_MASK_USER); } else if (addr == (addr_t) &dummy32->regs.psw.addr) { /* Fake a 31 bit psw address. */ - tmp = (__u32) task_pt_regs(child)->psw.addr | - PSW32_ADDR_AMODE31; + tmp = (__u32) regs->psw.addr | PSW32_ADDR_AMODE; } else { /* gpr 0-15 */ - tmp = *(__u32 *)((addr_t) &task_pt_regs(child)->psw + - addr*2 + 4); + tmp = *(__u32 *)((addr_t) ®s->psw + addr*2 + 4); } } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) { /* @@ -604,20 +605,20 @@ static int __poke_user_compat(struct task_struct *child, addr_t offset; if (addr < (addr_t) &dummy32->regs.acrs) { + struct pt_regs *regs = task_pt_regs(child); /* * psw, gprs, acrs and orig_gpr2 are stored on the stack */ if (addr == (addr_t) &dummy32->regs.psw.mask) { /* Build a 64 bit psw mask from 31 bit mask. */ - if (tmp != PSW32_MASK_MERGE(psw32_user_bits, tmp)) + if ((tmp & ~PSW32_MASK_USER) != psw32_user_bits) /* Invalid psw mask. */ return -EINVAL; - task_pt_regs(child)->psw.mask = - PSW_MASK_MERGE(psw_user32_bits, (__u64) tmp << 32); + regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) | + (__u64)(tmp & PSW32_MASK_USER) << 32; } else if (addr == (addr_t) &dummy32->regs.psw.addr) { /* Build a 64 bit psw address from 31 bit address. */ - task_pt_regs(child)->psw.addr = - (__u64) tmp & PSW32_ADDR_INSN; + regs->psw.addr = (__u64) tmp & PSW32_ADDR_INSN; /* * The debugger changed the instruction address, * reset system call restart, see signal.c:do_signal @@ -625,8 +626,7 @@ static int __poke_user_compat(struct task_struct *child, task_thread_info(child)->system_call = 0; } else { /* gpr 0-15 */ - *(__u32*)((addr_t) &task_pt_regs(child)->psw - + addr*2 + 4) = tmp; + *(__u32*)((addr_t) ®s->psw + addr*2 + 4) = tmp; } } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) { /* |
