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[PATCH] amd64: task_pt_regs()

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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 01:05:38 -08:00 committed by Linus Torvalds
parent e4f17c436f
commit bb049232fa
7 changed files with 13 additions and 21 deletions
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7
arch/x86_64/ia32/ia32_binfmt.c
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@ -197,8 +197,7 @@ static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *re
static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
{
struct pt_regs *pp = (struct pt_regs *)(t->thread.rsp0);
--pp;
struct pt_regs *pp = task_pt_regs(t);
ELF_CORE_COPY_REGS((*elfregs), pp);
/* fix wrong segments */
(*elfregs)[7] = t->thread.ds;
@ -217,7 +216,7 @@ elf_core_copy_task_fpregs(struct task_struct *tsk, struct pt_regs *regs, elf_fpr
if (!tsk_used_math(tsk))
return 0;
if (!regs)
regs = ((struct pt_regs *)tsk->thread.rsp0) - 1;
regs = task_pt_regs(tsk);
if (tsk == current)
unlazy_fpu(tsk);
set_fs(KERNEL_DS);
@ -233,7 +232,7 @@ elf_core_copy_task_fpregs(struct task_struct *tsk, struct pt_regs *regs, elf_fpr
static inline int
elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
{
struct pt_regs *regs = ((struct pt_regs *)(t->thread.rsp0))-1;
struct pt_regs *regs = task_pt_regs(t);
if (!tsk_used_math(t))
return 0;
if (t == current)

6
arch/x86_64/ia32/ptrace32.c
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@ -41,7 +41,7 @@
static int putreg32(struct task_struct *child, unsigned regno, u32 val)
{
int i;
__u64 *stack = (__u64 *)(child->thread.rsp0 - sizeof(struct pt_regs));
__u64 *stack = (__u64 *)task_pt_regs(child);
switch (regno) {
case offsetof(struct user32, regs.fs):
@ -137,7 +137,7 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val)
static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
{
__u64 *stack = (__u64 *)(child->thread.rsp0 - sizeof(struct pt_regs));
__u64 *stack = (__u64 *)task_pt_regs(child);
switch (regno) {
case offsetof(struct user32, regs.fs):
@ -238,7 +238,7 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
if (ret < 0)
goto out;
childregs = (struct pt_regs *)(child->thread.rsp0 - sizeof(struct pt_regs));
childregs = task_pt_regs(child);
switch (request) {
case PTRACE_PEEKDATA:

3
arch/x86_64/kernel/process.c
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@ -822,8 +822,7 @@ int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
{
struct pt_regs *pp, ptregs;
pp = (struct pt_regs *)(tsk->thread.rsp0);
--pp;
pp = task_pt_regs(tsk);
ptregs = *pp;
ptregs.cs &= 0xffff;

10
arch/x86_64/kernel/ptrace.c
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@ -67,12 +67,6 @@ static inline unsigned long get_stack_long(struct task_struct *task, int offset)
return (*((unsigned long *)stack));
}
static inline struct pt_regs *get_child_regs(struct task_struct *task)
{
struct pt_regs *regs = (void *)task->thread.rsp0;
return regs - 1;
}
/*
* this routine will put a word on the processes privileged stack.
* the offset is how far from the base addr as stored in the TSS.
@ -170,7 +164,7 @@ static int is_at_popf(struct task_struct *child, struct pt_regs *regs)
static void set_singlestep(struct task_struct *child)
{
struct pt_regs *regs = get_child_regs(child);
struct pt_regs *regs = task_pt_regs(child);
/*
* Always set TIF_SINGLESTEP - this guarantees that
@ -208,7 +202,7 @@ static void clear_singlestep(struct task_struct *child)
/* But touch TF only if it was set by us.. */
if (child->ptrace & PT_DTRACE) {
struct pt_regs *regs = get_child_regs(child);
struct pt_regs *regs = task_pt_regs(child);
regs->eflags &= ~TRAP_FLAG;
child->ptrace &= ~PT_DTRACE;
}

2
arch/x86_64/kernel/traps.c
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@ -666,7 +666,7 @@ asmlinkage struct pt_regs *sync_regs(struct pt_regs *eregs)
;
/* Exception from user space */
else if (user_mode(eregs))
regs = ((struct pt_regs *)current->thread.rsp0) - 1;
regs = task_pt_regs(current);
/* Exception from kernel and interrupts are enabled. Move to
kernel process stack. */
else if (eregs->eflags & X86_EFLAGS_IF)

2
include/asm-x86_64/compat.h
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@ -198,7 +198,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
static __inline__ void __user *compat_alloc_user_space(long len)
{
struct pt_regs *regs = (void *)current->thread.rsp0 - sizeof(struct pt_regs);
struct pt_regs *regs = task_pt_regs(current);
return (void __user *)regs->rsp - len;
}

4
include/asm-x86_64/processor.h
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@ -321,8 +321,8 @@ extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8))
extern unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) \
(((struct pt_regs *)(tsk->thread.rsp0 - sizeof(struct pt_regs)))->rip)
#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.rsp0 - 1)
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->rip)
#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */