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[PATCH] m32r: task_pt_regs(), task_stack_page(), task_thread_info()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Al Viro 2006-01-12 01:05:52 -08:00 committed by Linus Torvalds
parent b7f6961d83
commit 6c3559fc45
4 changed files with 9 additions and 26 deletions
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5
arch/m32r/kernel/process.c
View file

@ -242,13 +242,10 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
int copy_thread(int nr, unsigned long clone_flags, unsigned long spu,
unsigned long unused, struct task_struct *tsk, struct pt_regs *regs)
{
struct pt_regs *childregs;
unsigned long sp = (unsigned long)tsk->thread_info + THREAD_SIZE;
struct pt_regs *childregs = task_pt_regs(tsk);
extern void ret_from_fork(void);
/* Copy registers */
sp -= sizeof (struct pt_regs);
childregs = (struct pt_regs *)sp;
*childregs = *regs;
childregs->spu = spu;

25
arch/m32r/kernel/ptrace.c
View file

@ -34,23 +34,6 @@
#include <asm/processor.h>
#include <asm/mmu_context.h>
/*
* Get the address of the live pt_regs for the specified task.
* These are saved onto the top kernel stack when the process
* is not running.
*
* Note: if a user thread is execve'd from kernel space, the
* kernel stack will not be empty on entry to the kernel, so
* ptracing these tasks will fail.
*/
static inline struct pt_regs *
get_user_regs(struct task_struct *task)
{
return (struct pt_regs *)
((unsigned long)task->thread_info + THREAD_SIZE
- sizeof(struct pt_regs));
}
/*
* This routine will get a word off of the process kernel stack.
*/
@ -59,7 +42,7 @@ get_stack_long(struct task_struct *task, int offset)
{
unsigned long *stack;
stack = (unsigned long *)get_user_regs(task);
stack = (unsigned long *)task_pt_regs(task);
return stack[offset];
}
@ -72,7 +55,7 @@ put_stack_long(struct task_struct *task, int offset, unsigned long data)
{
unsigned long *stack;
stack = (unsigned long *)get_user_regs(task);
stack = (unsigned long *)task_pt_regs(task);
stack[offset] = data;
return 0;
@ -208,7 +191,7 @@ static int ptrace_write_user(struct task_struct *tsk, unsigned long off,
*/
static int ptrace_getregs(struct task_struct *tsk, void __user *uregs)
{
struct pt_regs *regs = get_user_regs(tsk);
struct pt_regs *regs = task_pt_regs(tsk);
return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
}
@ -223,7 +206,7 @@ static int ptrace_setregs(struct task_struct *tsk, void __user *uregs)
ret = -EFAULT;
if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
struct pt_regs *regs = get_user_regs(tsk);
struct pt_regs *regs = task_pt_regs(tsk);
*regs = newregs;
ret = 0;
}

2
arch/m32r/kernel/smpboot.c
View file

@ -286,7 +286,7 @@ static void __init do_boot_cpu(int phys_id)
/* So we see what's up */
printk("Booting processor %d/%d\n", phys_id, cpu_id);
stack_start.spi = (void *)idle->thread.sp;
idle->thread_info->cpu = cpu_id;
task_thread_info(idle)->cpu = cpu_id;
/*
* Send Startup IPI

3
include/asm-m32r/ptrace.h
View file

@ -163,6 +163,9 @@ extern void show_regs(struct pt_regs *);
extern void withdraw_debug_trap(struct pt_regs *regs);
#define task_pt_regs(task) \
((struct pt_regs *)(task_stack_page(task) + THREAD_SIZE) - 1)
#endif /* __KERNEL */
#endif /* _ASM_M32R_PTRACE_H */