From: Al Viro Date: Thu, 12 Jan 2006 09:05:49 +0000 (-0800) Subject: [PATCH] s390: task_pt_regs() X-Git-Tag: v2.6.16-rc1~253 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7584fb6b46a71a1aba5e06dc3cc54ce10f0129e;p=linux-2.6 [PATCH] s390: task_pt_regs() Signed-off-by: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/s390/kernel/binfmt_elf32.c b/arch/s390/kernel/binfmt_elf32.c index 03ba5893f1..1f451c2cb0 100644 --- a/arch/s390/kernel/binfmt_elf32.c +++ b/arch/s390/kernel/binfmt_elf32.c @@ -112,7 +112,7 @@ static inline int dump_regs32(struct pt_regs *ptregs, elf_gregset_t *regs) static inline int dump_task_regs32(struct task_struct *tsk, elf_gregset_t *regs) { - struct pt_regs *ptregs = __KSTK_PTREGS(tsk); + struct pt_regs *ptregs = task_pt_regs(tsk); int i; memcpy(®s->psw.mask, &ptregs->psw.mask, 4); diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 7dd58f8ac6..9f643309ed 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -217,8 +217,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp, struct pt_regs childregs; } *frame; - frame = ((struct fake_frame *) - (THREAD_SIZE + (unsigned long) p->thread_info)) - 1; + frame = container_of(task_pt_regs(p), struct fake_frame, childregs); p->thread.ksp = (unsigned long) frame; /* Store access registers to kernel stack of new process. */ frame->childregs = *regs; diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index cc02232aa9..37dfe33dab 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -52,7 +52,7 @@ FixPerRegisters(struct task_struct *task) struct pt_regs *regs; per_struct *per_info; - regs = __KSTK_PTREGS(task); + regs = task_pt_regs(task); per_info = (per_struct *) &task->thread.per_info; per_info->control_regs.bits.em_instruction_fetch = per_info->single_step | per_info->instruction_fetch; @@ -150,7 +150,7 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data) /* * psw and gprs are stored on the stack */ - tmp = *(addr_t *)((addr_t) &__KSTK_PTREGS(child)->psw + 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; @@ -176,7 +176,7 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data) /* * orig_gpr2 is stored on the kernel stack */ - tmp = (addr_t) __KSTK_PTREGS(child)->orig_gpr2; + tmp = (addr_t) task_pt_regs(child)->orig_gpr2; } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) { /* @@ -243,7 +243,7 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data) high order bit but older gdb's rely on it */ data |= PSW_ADDR_AMODE; #endif - *(addr_t *)((addr_t) &__KSTK_PTREGS(child)->psw + addr) = data; + *(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr) = data; } else if (addr < (addr_t) (&dummy->regs.orig_gpr2)) { /* @@ -267,7 +267,7 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data) /* * orig_gpr2 is stored on the kernel stack */ - __KSTK_PTREGS(child)->orig_gpr2 = data; + task_pt_regs(child)->orig_gpr2 = data; } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) { /* @@ -393,15 +393,15 @@ peek_user_emu31(struct task_struct *child, addr_t addr, addr_t data) */ if (addr == (addr_t) &dummy32->regs.psw.mask) { /* Fake a 31 bit psw mask. */ - tmp = (__u32)(__KSTK_PTREGS(child)->psw.mask >> 32); + tmp = (__u32)(task_pt_regs(child)->psw.mask >> 32); tmp = PSW32_MASK_MERGE(PSW32_USER_BITS, tmp); } else if (addr == (addr_t) &dummy32->regs.psw.addr) { /* Fake a 31 bit psw address. */ - tmp = (__u32) __KSTK_PTREGS(child)->psw.addr | + tmp = (__u32) task_pt_regs(child)->psw.addr | PSW32_ADDR_AMODE31; } else { /* gpr 0-15 */ - tmp = *(__u32 *)((addr_t) &__KSTK_PTREGS(child)->psw + + tmp = *(__u32 *)((addr_t) &task_pt_regs(child)->psw + addr*2 + 4); } } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) { @@ -415,7 +415,7 @@ peek_user_emu31(struct task_struct *child, addr_t addr, addr_t data) /* * orig_gpr2 is stored on the kernel stack */ - tmp = *(__u32*)((addr_t) &__KSTK_PTREGS(child)->orig_gpr2 + 4); + tmp = *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4); } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) { /* @@ -472,15 +472,15 @@ poke_user_emu31(struct task_struct *child, addr_t addr, addr_t data) if (tmp != PSW32_MASK_MERGE(PSW32_USER_BITS, tmp)) /* Invalid psw mask. */ return -EINVAL; - __KSTK_PTREGS(child)->psw.mask = + task_pt_regs(child)->psw.mask = PSW_MASK_MERGE(PSW_USER32_BITS, (__u64) tmp << 32); } else if (addr == (addr_t) &dummy32->regs.psw.addr) { /* Build a 64 bit psw address from 31 bit address. */ - __KSTK_PTREGS(child)->psw.addr = + task_pt_regs(child)->psw.addr = (__u64) tmp & PSW32_ADDR_INSN; } else { /* gpr 0-15 */ - *(__u32*)((addr_t) &__KSTK_PTREGS(child)->psw + *(__u32*)((addr_t) &task_pt_regs(child)->psw + addr*2 + 4) = tmp; } } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) { @@ -494,7 +494,7 @@ poke_user_emu31(struct task_struct *child, addr_t addr, addr_t data) /* * orig_gpr2 is stored on the kernel stack */ - *(__u32*)((addr_t) &__KSTK_PTREGS(child)->orig_gpr2 + 4) = tmp; + *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4) = tmp; } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) { /* diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c index c36353e8c1..b0d8ca8e5e 100644 --- a/arch/s390/kernel/time.c +++ b/arch/s390/kernel/time.c @@ -282,7 +282,7 @@ static inline void start_hz_timer(void) { if (!cpu_isset(smp_processor_id(), nohz_cpu_mask)) return; - account_ticks(__KSTK_PTREGS(current)); + account_ticks(task_pt_regs(current)); cpu_clear(smp_processor_id(), nohz_cpu_mask); } diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index 95d1099686..012135b8b3 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -240,7 +240,7 @@ char *task_show_regs(struct task_struct *task, char *buffer) { struct pt_regs *regs; - regs = __KSTK_PTREGS(task); + regs = task_pt_regs(task); buffer += sprintf(buffer, "task: %p, ksp: %p\n", task, (void *)task->thread.ksp); buffer += sprintf(buffer, "User PSW : %p %p\n", diff --git a/include/asm-s390/elf.h b/include/asm-s390/elf.h index 372d51cccd..710646e64f 100644 --- a/include/asm-s390/elf.h +++ b/include/asm-s390/elf.h @@ -163,7 +163,7 @@ static inline int dump_regs(struct pt_regs *ptregs, elf_gregset_t *regs) static inline int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs) { - struct pt_regs *ptregs = __KSTK_PTREGS(tsk); + struct pt_regs *ptregs = task_pt_regs(tsk); memcpy(®s->psw, &ptregs->psw, sizeof(regs->psw)+sizeof(regs->gprs)); memcpy(regs->acrs, tsk->thread.acrs, sizeof(regs->acrs)); regs->orig_gpr2 = ptregs->orig_gpr2; diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h index 4ec652ebb3..795bfcb95d 100644 --- a/include/asm-s390/processor.h +++ b/include/asm-s390/processor.h @@ -191,10 +191,10 @@ extern void show_registers(struct pt_regs *regs); extern void show_trace(struct task_struct *task, unsigned long *sp); unsigned long get_wchan(struct task_struct *p); -#define __KSTK_PTREGS(tsk) ((struct pt_regs *) \ - ((unsigned long) tsk->thread_info + THREAD_SIZE - sizeof(struct pt_regs))) -#define KSTK_EIP(tsk) (__KSTK_PTREGS(tsk)->psw.addr) -#define KSTK_ESP(tsk) (__KSTK_PTREGS(tsk)->gprs[15]) +#define task_pt_regs(tsk) ((struct pt_regs *) \ + ((void *)(tsk)->thread_info + THREAD_SIZE) - 1) +#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr) +#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15]) /* * Give up the time slice of the virtual PU.