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Diffstat (limited to 'arch/sparc64/kernel/ptrace.c')
-rw-r--r--arch/sparc64/kernel/ptrace.c80
1 files changed, 28 insertions, 52 deletions
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index 774ecbb8a03..3f9746f856d 100644
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -198,39 +198,15 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
}
#endif
if (request == PTRACE_TRACEME) {
- int ret;
-
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED) {
- pt_error_return(regs, EPERM);
- goto out;
- }
- ret = security_ptrace(current->parent, current);
- if (ret) {
- pt_error_return(regs, -ret);
- goto out;
- }
-
- /* set the ptrace bit in the process flags. */
- current->ptrace |= PT_PTRACED;
+ ret = ptrace_traceme();
pt_succ_return(regs, 0);
goto out;
}
-#ifndef ALLOW_INIT_TRACING
- if (pid == 1) {
- /* Can't dork with init. */
- pt_error_return(regs, EPERM);
- goto out;
- }
-#endif
- read_lock(&tasklist_lock);
- child = find_task_by_pid(pid);
- if (child)
- get_task_struct(child);
- read_unlock(&tasklist_lock);
- if (!child) {
- pt_error_return(regs, ESRCH);
+ child = ptrace_get_task_struct(pid);
+ if (IS_ERR(child)) {
+ ret = PTR_ERR(child);
+ pt_error_return(regs, -ret);
goto out;
}
@@ -320,7 +296,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
case PTRACE_GETREGS: {
struct pt_regs32 __user *pregs =
(struct pt_regs32 __user *) addr;
- struct pt_regs *cregs = child->thread_info->kregs;
+ struct pt_regs *cregs = task_pt_regs(child);
int rval;
if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) ||
@@ -344,11 +320,11 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
case PTRACE_GETREGS64: {
struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
- struct pt_regs *cregs = child->thread_info->kregs;
+ struct pt_regs *cregs = task_pt_regs(child);
unsigned long tpc = cregs->tpc;
int rval;
- if ((child->thread_info->flags & _TIF_32BIT) != 0)
+ if ((task_thread_info(child)->flags & _TIF_32BIT) != 0)
tpc &= 0xffffffff;
if (__put_user(cregs->tstate, (&pregs->tstate)) ||
__put_user(tpc, (&pregs->tpc)) ||
@@ -372,7 +348,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
case PTRACE_SETREGS: {
struct pt_regs32 __user *pregs =
(struct pt_regs32 __user *) addr;
- struct pt_regs *cregs = child->thread_info->kregs;
+ struct pt_regs *cregs = task_pt_regs(child);
unsigned int psr, pc, npc, y;
int i;
@@ -405,7 +381,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
case PTRACE_SETREGS64: {
struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
- struct pt_regs *cregs = child->thread_info->kregs;
+ struct pt_regs *cregs = task_pt_regs(child);
unsigned long tstate, tpc, tnpc, y;
int i;
@@ -419,7 +395,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
pt_error_return(regs, EFAULT);
goto out_tsk;
}
- if ((child->thread_info->flags & _TIF_32BIT) != 0) {
+ if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) {
tpc &= 0xffffffff;
tnpc &= 0xffffffff;
}
@@ -454,11 +430,11 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
} fpq[16];
};
struct fps __user *fps = (struct fps __user *) addr;
- unsigned long *fpregs = child->thread_info->fpregs;
+ unsigned long *fpregs = task_thread_info(child)->fpregs;
if (copy_to_user(&fps->regs[0], fpregs,
(32 * sizeof(unsigned int))) ||
- __put_user(child->thread_info->xfsr[0], (&fps->fsr)) ||
+ __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)) ||
__put_user(0, (&fps->fpqd)) ||
__put_user(0, (&fps->flags)) ||
__put_user(0, (&fps->extra)) ||
@@ -476,11 +452,11 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
unsigned long fsr;
};
struct fps __user *fps = (struct fps __user *) addr;
- unsigned long *fpregs = child->thread_info->fpregs;
+ unsigned long *fpregs = task_thread_info(child)->fpregs;
if (copy_to_user(&fps->regs[0], fpregs,
(64 * sizeof(unsigned int))) ||
- __put_user(child->thread_info->xfsr[0], (&fps->fsr))) {
+ __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
pt_error_return(regs, EFAULT);
goto out_tsk;
}
@@ -501,7 +477,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
} fpq[16];
};
struct fps __user *fps = (struct fps __user *) addr;
- unsigned long *fpregs = child->thread_info->fpregs;
+ unsigned long *fpregs = task_thread_info(child)->fpregs;
unsigned fsr;
if (copy_from_user(fpregs, &fps->regs[0],
@@ -510,11 +486,11 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
pt_error_return(regs, EFAULT);
goto out_tsk;
}
- child->thread_info->xfsr[0] &= 0xffffffff00000000UL;
- child->thread_info->xfsr[0] |= fsr;
- if (!(child->thread_info->fpsaved[0] & FPRS_FEF))
- child->thread_info->gsr[0] = 0;
- child->thread_info->fpsaved[0] |= (FPRS_FEF | FPRS_DL);
+ task_thread_info(child)->xfsr[0] &= 0xffffffff00000000UL;
+ task_thread_info(child)->xfsr[0] |= fsr;
+ if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
+ task_thread_info(child)->gsr[0] = 0;
+ task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL);
pt_succ_return(regs, 0);
goto out_tsk;
}
@@ -525,17 +501,17 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
unsigned long fsr;
};
struct fps __user *fps = (struct fps __user *) addr;
- unsigned long *fpregs = child->thread_info->fpregs;
+ unsigned long *fpregs = task_thread_info(child)->fpregs;
if (copy_from_user(fpregs, &fps->regs[0],
(64 * sizeof(unsigned int))) ||
- __get_user(child->thread_info->xfsr[0], (&fps->fsr))) {
+ __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) {
pt_error_return(regs, EFAULT);
goto out_tsk;
}
- if (!(child->thread_info->fpsaved[0] & FPRS_FEF))
- child->thread_info->gsr[0] = 0;
- child->thread_info->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU);
+ if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF))
+ task_thread_info(child)->gsr[0] = 0;
+ task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU);
pt_succ_return(regs, 0);
goto out_tsk;
}
@@ -586,8 +562,8 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
#ifdef DEBUG_PTRACE
printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm,
child->pid, child->exit_code,
- child->thread_info->kregs->tpc,
- child->thread_info->kregs->tnpc);
+ task_pt_regs(child)->tpc,
+ task_pt_regs(child)->tnpc);
#endif
wake_up_process(child);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-14 19:49:48 +0000