extra-y := head.o init_task.o vmlinux.lds
obj-y := debugtraps.o io.o io_generic.o irq.o machvec.o process_32.o \
- ptrace.o semaphore.o setup.o signal.o sys_sh.o syscalls.o \
+ ptrace_32.o semaphore.o setup.o signal.o sys_sh.o syscalls.o \
time.o topology.o traps.o
obj-y += cpu/ timers/
extra-y := head.o init_task.o vmlinux.lds
obj-y := debugtraps.o io.o io_generic.o irq.o machvec.o process_64.o \
- ptrace.o semaphore.o setup.o signal.o sys_sh.o syscalls.o \
+ ptrace_64.o semaphore.o setup.o signal.o sys_sh.o syscalls.o \
time.o topology.o traps.o
obj-y += cpu/ timers/
+++ /dev/null
-/*
- * 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)®s->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;
- }
-}
--- /dev/null
+/*
+ * 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)®s->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;
+ }
+}
--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * arch/sh64/kernel/ptrace.c
+ *
+ * Copyright (C) 2000, 2001 Paolo Alberelli
+ * Copyright (C) 2003 Paul Mundt
+ *
+ * Started from SH3/4 version:
+ * SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
+ *
+ * Original x86 implementation:
+ * By Ross Biro 1/23/92
+ * edited by Linus Torvalds
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/rwsem.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/processor.h>
+#include <asm/mmu_context.h>
+
+/* This mask defines the bits of the SR which the user is not allowed to
+ change, which are everything except S, Q, M, PR, SZ, FR. */
+#define SR_MASK (0xffff8cfd)
+
+/*
+ * does not yet catch signals sent when the child dies.
+ * in exit.c or in signal.c.
+ */
+
+/*
+ * This routine will get a word from the user area in the process kernel stack.
+ */
+static inline int get_stack_long(struct task_struct *task, int offset)
+{
+ unsigned char *stack;
+
+ stack = (unsigned char *)(task->thread.uregs);
+ stack += offset;
+ return (*((int *)stack));
+}
+
+static inline unsigned long
+get_fpu_long(struct task_struct *task, unsigned long addr)
+{
+ unsigned long tmp;
+ struct pt_regs *regs;
+ regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
+
+ if (!tsk_used_math(task)) {
+ if (addr == offsetof(struct user_fpu_struct, fpscr)) {
+ tmp = FPSCR_INIT;
+ } else {
+ tmp = 0xffffffffUL; /* matches initial value in fpu.c */
+ }
+ return tmp;
+ }
+
+ if (last_task_used_math == task) {
+ grab_fpu();
+ fpsave(&task->thread.fpu.hard);
+ release_fpu();
+ last_task_used_math = 0;
+ regs->sr |= SR_FD;
+ }
+
+ tmp = ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)];
+ return tmp;
+}
+
+/*
+ * This routine will put a word into the user area in 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->thread.uregs);
+ stack += offset;
+ *(unsigned long *) stack = data;
+ return 0;
+}
+
+static inline int
+put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
+{
+ struct pt_regs *regs;
+
+ regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
+
+ if (!tsk_used_math(task)) {
+ fpinit(&task->thread.fpu.hard);
+ set_stopped_child_used_math(task);
+ } else if (last_task_used_math == task) {
+ grab_fpu();
+ fpsave(&task->thread.fpu.hard);
+ release_fpu();
+ last_task_used_math = 0;
+ regs->sr |= SR_FD;
+ }
+
+ ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)] = data;
+ return 0;
+}
+
+
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
+{
+ 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)
+ break;
+
+ if (addr < sizeof(struct pt_regs))
+ tmp = get_stack_long(child, addr);
+ else if ((addr >= offsetof(struct user, fpu)) &&
+ (addr < offsetof(struct user, u_fpvalid))) {
+ tmp = get_fpu_long(child, addr - offsetof(struct user, fpu));
+ } else if (addr == offsetof(struct user, u_fpvalid)) {
+ tmp = !!tsk_used_math(child);
+ } else {
+ break;
+ }
+ ret = put_user(tmp, (unsigned long *)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. We must
+ disallow any changes to certain SR bits or u_fpvalid, since
+ this could crash the kernel or result in a security
+ loophole. */
+ ret = -EIO;
+ if ((addr & 3) || addr < 0)
+ break;
+
+ if (addr < sizeof(struct pt_regs)) {
+ /* Ignore change of top 32 bits of SR */
+ if (addr == offsetof (struct pt_regs, sr)+4)
+ {
+ ret = 0;
+ break;
+ }
+ /* If lower 32 bits of SR, ignore non-user bits */
+ if (addr == offsetof (struct pt_regs, sr))
+ {
+ long cursr = get_stack_long(child, addr);
+ data &= ~(SR_MASK);
+ data |= (cursr & SR_MASK);
+ }
+ ret = put_stack_long(child, addr, data);
+ }
+ else if ((addr >= offsetof(struct user, fpu)) &&
+ (addr < offsetof(struct user, u_fpvalid))) {
+ ret = put_fpu_long(child, addr - offsetof(struct user, fpu), data);
+ }
+ 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);
+ 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;
+ child->exit_code = SIGKILL;
+ wake_up_process(child);
+ break;
+ }
+
+ case PTRACE_SINGLESTEP: { /* set the trap flag. */
+ struct pt_regs *regs;
+
+ 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;
+ }
+
+ regs = child->thread.uregs;
+
+ regs->sr |= SR_SSTEP; /* auto-resetting upon exception */
+
+ child->exit_code = data;
+ /* give it a chance to run. */
+ wake_up_process(child);
+ ret = 0;
+ break;
+ }
+
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ break;
+ }
+ return ret;
+}
+
+asmlinkage int sh64_ptrace(long request, long pid, long addr, long data)
+{
+ extern void poke_real_address_q(unsigned long long addr, unsigned long long data);
+#define WPC_DBRMODE 0x0d104008
+ static int first_call = 1;
+
+ lock_kernel();
+ if (first_call) {
+ /* Set WPC.DBRMODE to 0. This makes all debug events get
+ * delivered through RESVEC, i.e. into the handlers in entry.S.
+ * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE
+ * would normally be left set to 1, which makes debug events get
+ * delivered through DBRVEC, i.e. into the remote gdb's
+ * handlers. This prevents ptrace getting them, and confuses
+ * the remote gdb.) */
+ printk("DBRMODE set to 0 to permit native debugging\n");
+ poke_real_address_q(WPC_DBRMODE, 0);
+ first_call = 0;
+ }
+ unlock_kernel();
+
+ return sys_ptrace(request, pid, addr, data);
+}
+
+asmlinkage void syscall_trace(void)
+{
+ struct task_struct *tsk = current;
+
+ if (!test_thread_flag(TIF_SYSCALL_TRACE))
+ return;
+ if (!(tsk->ptrace & PT_PTRACED))
+ return;
+
+ ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+ ? 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;
+ }
+}
+
+/* Called with interrupts disabled */
+asmlinkage void do_single_step(unsigned long long vec, struct pt_regs *regs)
+{
+ /* This is called after a single step exception (DEBUGSS).
+ There is no need to change the PC, as it is a post-execution
+ exception, as entry.S does not do anything to the PC for DEBUGSS.
+ We need to clear the Single Step setting in SR to avoid
+ continually stepping. */
+ local_irq_enable();
+ regs->sr &= ~SR_SSTEP;
+ force_sig(SIGTRAP, current);
+}
+
+/* Called with interrupts disabled */
+asmlinkage void do_software_break_point(unsigned long long vec,
+ struct pt_regs *regs)
+{
+ /* We need to forward step the PC, to counteract the backstep done
+ in signal.c. */
+ local_irq_enable();
+ force_sig(SIGTRAP, current);
+ regs->pc += 4;
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching..
+ *
+ * Make sure single step bits etc are not set.
+ */
+void ptrace_disable(struct task_struct *child)
+{
+ /* nothing to do.. */
+}
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * arch/sh64/kernel/ptrace.c
- *
- * Copyright (C) 2000, 2001 Paolo Alberelli
- * Copyright (C) 2003 Paul Mundt
- *
- * Started from SH3/4 version:
- * SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
- *
- * Original x86 implementation:
- * By Ross Biro 1/23/92
- * edited by Linus Torvalds
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/rwsem.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/signal.h>
-#include <linux/syscalls.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm/mmu_context.h>
-
-/* This mask defines the bits of the SR which the user is not allowed to
- change, which are everything except S, Q, M, PR, SZ, FR. */
-#define SR_MASK (0xffff8cfd)
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * This routine will get a word from the user area in the process kernel stack.
- */
-static inline int get_stack_long(struct task_struct *task, int offset)
-{
- unsigned char *stack;
-
- stack = (unsigned char *)(task->thread.uregs);
- stack += offset;
- return (*((int *)stack));
-}
-
-static inline unsigned long
-get_fpu_long(struct task_struct *task, unsigned long addr)
-{
- unsigned long tmp;
- struct pt_regs *regs;
- regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
-
- if (!tsk_used_math(task)) {
- if (addr == offsetof(struct user_fpu_struct, fpscr)) {
- tmp = FPSCR_INIT;
- } else {
- tmp = 0xffffffffUL; /* matches initial value in fpu.c */
- }
- return tmp;
- }
-
- if (last_task_used_math == task) {
- grab_fpu();
- fpsave(&task->thread.fpu.hard);
- release_fpu();
- last_task_used_math = 0;
- regs->sr |= SR_FD;
- }
-
- tmp = ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)];
- return tmp;
-}
-
-/*
- * This routine will put a word into the user area in 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->thread.uregs);
- stack += offset;
- *(unsigned long *) stack = data;
- return 0;
-}
-
-static inline int
-put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
-{
- struct pt_regs *regs;
-
- regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
-
- if (!tsk_used_math(task)) {
- fpinit(&task->thread.fpu.hard);
- set_stopped_child_used_math(task);
- } else if (last_task_used_math == task) {
- grab_fpu();
- fpsave(&task->thread.fpu.hard);
- release_fpu();
- last_task_used_math = 0;
- regs->sr |= SR_FD;
- }
-
- ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)] = data;
- return 0;
-}
-
-
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
-{
- 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)
- break;
-
- if (addr < sizeof(struct pt_regs))
- tmp = get_stack_long(child, addr);
- else if ((addr >= offsetof(struct user, fpu)) &&
- (addr < offsetof(struct user, u_fpvalid))) {
- tmp = get_fpu_long(child, addr - offsetof(struct user, fpu));
- } else if (addr == offsetof(struct user, u_fpvalid)) {
- tmp = !!tsk_used_math(child);
- } else {
- break;
- }
- ret = put_user(tmp, (unsigned long *)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. We must
- disallow any changes to certain SR bits or u_fpvalid, since
- this could crash the kernel or result in a security
- loophole. */
- ret = -EIO;
- if ((addr & 3) || addr < 0)
- break;
-
- if (addr < sizeof(struct pt_regs)) {
- /* Ignore change of top 32 bits of SR */
- if (addr == offsetof (struct pt_regs, sr)+4)
- {
- ret = 0;
- break;
- }
- /* If lower 32 bits of SR, ignore non-user bits */
- if (addr == offsetof (struct pt_regs, sr))
- {
- long cursr = get_stack_long(child, addr);
- data &= ~(SR_MASK);
- data |= (cursr & SR_MASK);
- }
- ret = put_stack_long(child, addr, data);
- }
- else if ((addr >= offsetof(struct user, fpu)) &&
- (addr < offsetof(struct user, u_fpvalid))) {
- ret = put_fpu_long(child, addr - offsetof(struct user, fpu), data);
- }
- 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);
- 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;
- child->exit_code = SIGKILL;
- wake_up_process(child);
- break;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- struct pt_regs *regs;
-
- 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;
- }
-
- regs = child->thread.uregs;
-
- regs->sr |= SR_SSTEP; /* auto-resetting upon exception */
-
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
- return ret;
-}
-
-asmlinkage int sh64_ptrace(long request, long pid, long addr, long data)
-{
- extern void poke_real_address_q(unsigned long long addr, unsigned long long data);
-#define WPC_DBRMODE 0x0d104008
- static int first_call = 1;
-
- lock_kernel();
- if (first_call) {
- /* Set WPC.DBRMODE to 0. This makes all debug events get
- * delivered through RESVEC, i.e. into the handlers in entry.S.
- * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE
- * would normally be left set to 1, which makes debug events get
- * delivered through DBRVEC, i.e. into the remote gdb's
- * handlers. This prevents ptrace getting them, and confuses
- * the remote gdb.) */
- printk("DBRMODE set to 0 to permit native debugging\n");
- poke_real_address_q(WPC_DBRMODE, 0);
- first_call = 0;
- }
- unlock_kernel();
-
- return sys_ptrace(request, pid, addr, data);
-}
-
-asmlinkage void syscall_trace(void)
-{
- struct task_struct *tsk = current;
-
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- return;
- if (!(tsk->ptrace & PT_PTRACED))
- return;
-
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 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;
- }
-}
-
-/* Called with interrupts disabled */
-asmlinkage void do_single_step(unsigned long long vec, struct pt_regs *regs)
-{
- /* This is called after a single step exception (DEBUGSS).
- There is no need to change the PC, as it is a post-execution
- exception, as entry.S does not do anything to the PC for DEBUGSS.
- We need to clear the Single Step setting in SR to avoid
- continually stepping. */
- local_irq_enable();
- regs->sr &= ~SR_SSTEP;
- force_sig(SIGTRAP, current);
-}
-
-/* Called with interrupts disabled */
-asmlinkage void do_software_break_point(unsigned long long vec,
- struct pt_regs *regs)
-{
- /* We need to forward step the PC, to counteract the backstep done
- in signal.c. */
- local_irq_enable();
- force_sig(SIGTRAP, current);
- regs->pc += 4;
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* nothing to do.. */
-}
projects / linux-2.6-block.git / commitdiff