aboutsummaryrefslogtreecommitdiff
path: root/arch/sh/kernel/ptrace.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/kernel/ptrace.c')
-rw-r--r--arch/sh/kernel/ptrace.c274
1 files changed, 0 insertions, 274 deletions
diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c
deleted file mode 100644
index ac725f0aeb7..00000000000
--- a/arch/sh/kernel/ptrace.c
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- * linux/arch/sh/kernel/ptrace.c
- *
- * Original x86 implementation:
- * By Ross Biro 1/23/92
- * edited by Linus Torvalds
- *
- * SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
- *
- */
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/slab.h>
-#include <linux/security.h>
-#include <linux/signal.h>
-#include <linux/io.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm/mmu_context.h>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * This routine will get a word off of the process kernel stack.
- */
-static inline int get_stack_long(struct task_struct *task, int offset)
-{
- unsigned char *stack;
-
- stack = (unsigned char *)task_pt_regs(task);
- stack += offset;
- return (*((int *)stack));
-}
-
-/*
- * This routine will put a word on the process kernel stack.
- */
-static inline int put_stack_long(struct task_struct *task, int offset,
- unsigned long data)
-{
- unsigned char *stack;
-
- stack = (unsigned char *)task_pt_regs(task);
- stack += offset;
- *(unsigned long *) stack = data;
- return 0;
-}
-
-static void ptrace_disable_singlestep(struct task_struct *child)
-{
- clear_tsk_thread_flag(child, TIF_SINGLESTEP);
-
- /*
- * Ensure the UBC is not programmed at the next context switch.
- *
- * Normally this is not needed but there are sequences such as
- * singlestep, signal delivery, and continue that leave the
- * ubc_pc non-zero leading to spurious SIGTRAPs.
- */
- if (child->thread.ubc_pc != 0) {
- ubc_usercnt -= 1;
- child->thread.ubc_pc = 0;
- }
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- ptrace_disable_singlestep(child);
-}
-
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
-{
- struct user * dummy = NULL;
- int ret;
-
- switch (request) {
- /* when I and D space are separate, these will need to be fixed. */
- case PTRACE_PEEKTEXT: /* read word at location addr. */
- case PTRACE_PEEKDATA:
- ret = generic_ptrace_peekdata(child, addr, data);
- break;
-
- /* read the word at location addr in the USER area. */
- case PTRACE_PEEKUSR: {
- unsigned long tmp;
-
- ret = -EIO;
- if ((addr & 3) || addr < 0 ||
- addr > sizeof(struct user) - 3)
- break;
-
- if (addr < sizeof(struct pt_regs))
- tmp = get_stack_long(child, addr);
- else if (addr >= (long) &dummy->fpu &&
- addr < (long) &dummy->u_fpvalid) {
- if (!tsk_used_math(child)) {
- if (addr == (long)&dummy->fpu.fpscr)
- tmp = FPSCR_INIT;
- else
- tmp = 0;
- } else
- tmp = ((long *)&child->thread.fpu)
- [(addr - (long)&dummy->fpu) >> 2];
- } else if (addr == (long) &dummy->u_fpvalid)
- tmp = !!tsk_used_math(child);
- else
- tmp = 0;
- ret = put_user(tmp, (unsigned long __user *)data);
- break;
- }
-
- /* when I and D space are separate, this will have to be fixed. */
- case PTRACE_POKETEXT: /* write the word at location addr. */
- case PTRACE_POKEDATA:
- ret = generic_ptrace_pokedata(child, addr, data);
- break;
-
- case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
- ret = -EIO;
- if ((addr & 3) || addr < 0 ||
- addr > sizeof(struct user) - 3)
- break;
-
- if (addr < sizeof(struct pt_regs))
- ret = put_stack_long(child, addr, data);
- else if (addr >= (long) &dummy->fpu &&
- addr < (long) &dummy->u_fpvalid) {
- set_stopped_child_used_math(child);
- ((long *)&child->thread.fpu)
- [(addr - (long)&dummy->fpu) >> 2] = data;
- ret = 0;
- } else if (addr == (long) &dummy->u_fpvalid) {
- conditional_stopped_child_used_math(data, child);
- ret = 0;
- }
- break;
-
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: { /* restart after signal. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-
- ptrace_disable_singlestep(child);
-
- child->exit_code = data;
- wake_up_process(child);
- ret = 0;
- break;
- }
-
-/*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- case PTRACE_KILL: {
- ret = 0;
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- break;
- ptrace_disable_singlestep(child);
- child->exit_code = SIGKILL;
- wake_up_process(child);
- break;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- long pc;
- struct pt_regs *regs = NULL;
-
- ret = -EIO;
- if (!valid_signal(data))
- break;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- if ((child->ptrace & PT_DTRACE) == 0) {
- /* Spurious delayed TF traps may occur */
- child->ptrace |= PT_DTRACE;
- }
-
- pc = get_stack_long(child, (long)&regs->pc);
-
- /* Next scheduling will set up UBC */
- if (child->thread.ubc_pc == 0)
- ubc_usercnt += 1;
- child->thread.ubc_pc = pc;
-
- set_tsk_thread_flag(child, TIF_SINGLESTEP);
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
-#ifdef CONFIG_SH_DSP
- case PTRACE_GETDSPREGS: {
- unsigned long dp;
-
- ret = -EIO;
- dp = ((unsigned long) child) + THREAD_SIZE -
- sizeof(struct pt_dspregs);
- if (*((int *) (dp - 4)) == SR_FD) {
- copy_to_user(addr, (void *) dp,
- sizeof(struct pt_dspregs));
- ret = 0;
- }
- break;
- }
-
- case PTRACE_SETDSPREGS: {
- unsigned long dp;
-
- ret = -EIO;
- dp = ((unsigned long) child) + THREAD_SIZE -
- sizeof(struct pt_dspregs);
- if (*((int *) (dp - 4)) == SR_FD) {
- copy_from_user((void *) dp, addr,
- sizeof(struct pt_dspregs));
- ret = 0;
- }
- break;
- }
-#endif
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
-
- return ret;
-}
-
-asmlinkage void do_syscall_trace(void)
-{
- struct task_struct *tsk = current;
-
- if (!test_thread_flag(TIF_SYSCALL_TRACE) &&
- !test_thread_flag(TIF_SINGLESTEP))
- return;
- if (!(tsk->ptrace & PT_PTRACED))
- return;
- /* the 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) &&
- !test_thread_flag(TIF_SINGLESTEP) ? 0x80 : 0));
-
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (tsk->exit_code) {
- send_sig(tsk->exit_code, tsk, 1);
- tsk->exit_code = 0;
- }
-}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-29 14:28:18 +0000