[PATCH 21/50] s390: task_pt_regs()

From: Al Viro
Date: Tue Jan 03 2006 - 16:19:34 EST

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References: <20060103210515.5135@xxxxxxxxxxxxxxxx>
In-Reply-To: <20060103210515.5135@xxxxxxxxxxxxxxxx>

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

---

arch/s390/kernel/binfmt_elf32.c | 2 +-
arch/s390/kernel/process.c | 3 +--
arch/s390/kernel/ptrace.c | 26 +++++++++++++-------------
arch/s390/kernel/time.c | 2 +-
arch/s390/kernel/traps.c | 2 +-
include/asm-s390/elf.h | 2 +-
include/asm-s390/processor.h | 8 ++++----
7 files changed, 22 insertions(+), 23 deletions(-)

2f208594c40468ffa71336bd9fbab0435aea8ae7
diff --git a/arch/s390/kernel/binfmt_elf32.c b/arch/s390/kernel/binfmt_elf32.c
index 03ba589..1f451c2 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_

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(&regs->psw.mask, &ptregs->psw.mask, 4);
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 78b64fe..6997dc5 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -217,8 +217,7 @@ int copy_thread(int nr, unsigned long cl
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 06afa31..353dbe9 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, add
/*
* 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, add
/*
* 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, add
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, add
/*
* 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 *chil
*/
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 *chil
/*
* 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 *chil
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 *chil
/*
* 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 c36353e..b0d8ca8 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 c5bd36f..bcdfd6a 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -240,7 +240,7 @@ char *task_show_regs(struct task_struct
{
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 372d51c..710646e 100644
--- a/include/asm-s390/elf.h
+++ b/include/asm-s390/elf.h
@@ -163,7 +163,7 @@ static inline int dump_regs(struct pt_re

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(&regs->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 4ec652e..795bfcb 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -191,10 +191,10 @@ extern void show_registers(struct pt_reg
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.
--
0.99.9.GIT

-
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Previous message: Al Viro: "[PATCH 17/50] sparc: task_thread_info()"
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