Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 277 insertions, 0 deletions

diff --git a/arch/h8300/kernel/ptrace.c b/arch/h8300/kernel/ptrace.c
new file mode 100644
index 0000000..5f19d77
--- /dev/null
+++ b/arch/h8300/kernel/ptrace.c
@@ -0,0 +1,277 @@
+/*
+ *  linux/arch/h8300/kernel/ptrace.c
+ *
+ *  Yoshinori Sato <ysato@users.sourceforge.jp>
+ *
+ *  Based on:
+ *  linux/arch/m68k/kernel/ptrace.c
+ *
+ *  Copyright (C) 1994 by Hamish Macdonald
+ *  Taken from linux/kernel/ptrace.c and modified for M680x0.
+ *  linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
+ *
+ * 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.
+ */
+
+#include <linux/kernel.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/config.h>
+
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/processor.h>
+#include <asm/signal.h>
+
+/* cpu depend functions */
+extern long h8300_get_reg(struct task_struct *task, int regno);
+extern int  h8300_put_reg(struct task_struct *task, int regno, unsigned long data);
+extern void h8300_disable_trace(struct task_struct *child);
+extern void h8300_enable_trace(struct task_struct *child);
+
+/*
+ * does not yet catch signals sent when the child dies.
+ * in exit.c or in signal.c.
+ */
+
+inline
+static int read_long(struct task_struct * tsk, unsigned long addr,
+	unsigned long * result)
+{
+	*result = *(unsigned long *)addr;
+	return 0;
+}
+
+void ptrace_disable(struct task_struct *child)
+{
+	h8300_disable_trace(child);
+}
+
+asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
+{
+	struct task_struct *child;
+	int ret;
+
+	lock_kernel();
+	ret = -EPERM;
+	if (request == PTRACE_TRACEME) {
+		/* are we already being traced? */
+		if (current->ptrace & PT_PTRACED)
+			goto out;
+		/* set the ptrace bit in the process flags. */
+		current->ptrace |= PT_PTRACED;
+		ret = 0;
+		goto out;
+	}
+	ret = -ESRCH;
+	read_lock(&tasklist_lock);
+	child = find_task_by_pid(pid);
+	if (child)
+		get_task_struct(child);
+	read_unlock(&tasklist_lock);
+	if (!child)
+		goto out;
+
+	ret = -EPERM;
+	if (pid == 1)		/* you may not mess with init */
+		goto out_tsk;
+
+	if (request == PTRACE_ATTACH) {
+		ret = ptrace_attach(child);
+		goto out_tsk;
+	}
+	ret = ptrace_check_attach(child, request == PTRACE_KILL);
+	if (ret < 0)
+		goto out_tsk;
+
+	switch (request) {
+		case PTRACE_PEEKTEXT: /* read word at location addr. */ 
+		case PTRACE_PEEKDATA: {
+			unsigned long tmp;
+
+			ret = read_long(child, addr, &tmp);
+			if (ret < 0)
+				break ;
+			ret = put_user(tmp, (unsigned long *) data);
+			break ;
+		}
+
+	/* read the word at location addr in the USER area. */
+		case PTRACE_PEEKUSR: {
+			unsigned long tmp = 0;
+			
+			if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
+				ret = -EIO;
+				break ;
+			}
+			
+		        ret = 0;  /* Default return condition */
+			addr = addr >> 2; /* temporary hack. */
+
+			if (addr < H8300_REGS_NO)
+				tmp = h8300_get_reg(child, addr);
+			else {
+				switch(addr) {
+				case 49:
+					tmp = child->mm->start_code;
+					break ;
+				case 50:
+					tmp = child->mm->start_data;
+					break ;
+				case 51:
+					tmp = child->mm->end_code;
+					break ;
+				case 52:
+					tmp = child->mm->end_data;
+					break ;
+				default:
+					ret = -EIO;
+				}
+			}
+			if (!ret)
+				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 = 0;
+			if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
+				break;
+			ret = -EIO;
+			break;
+
+		case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
+			if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
+				ret = -EIO;
+				break ;
+			}
+			addr = addr >> 2; /* temporary hack. */
+			    
+			if (addr == PT_ORIG_ER0) {
+				ret = -EIO;
+				break ;
+			}
+			if (addr < H8300_REGS_NO) {
+				ret = h8300_put_reg(child, addr, data);
+				break ;
+			}
+			ret = -EIO;
+			break ;
+		case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
+		case PTRACE_CONT: { /* restart after signal. */
+			ret = -EIO;
+			if ((unsigned long) data >= _NSIG)
+				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);
+			/* make sure the single step bit is not set. */
+			h8300_disable_trace(child);
+			ret = 0;
+		}
+
+/*
+ * 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;
+			h8300_disable_trace(child);
+			wake_up_process(child);
+			break;
+		}
+
+		case PTRACE_SINGLESTEP: {  /* set the trap flag. */
+			ret = -EIO;
+			if ((unsigned long) data > _NSIG)
+				break;
+			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+			child->exit_code = data;
+			h8300_enable_trace(child);
+			wake_up_process(child);
+			ret = 0;
+			break;
+		}
+
+		case PTRACE_DETACH:	/* detach a process that was attached. */
+			ret = ptrace_detach(child, data);
+			break;
+
+		case PTRACE_GETREGS: { /* Get all gp regs from the child. */
+		  	int i;
+			unsigned long tmp;
+			for (i = 0; i < H8300_REGS_NO; i++) {
+			    tmp = h8300_get_reg(child, i);
+			    if (put_user(tmp, (unsigned long *) data)) {
+				ret = -EFAULT;
+				break;
+			    }
+			    data += sizeof(long);
+			}
+			ret = 0;
+			break;
+		}
+
+		case PTRACE_SETREGS: { /* Set all gp regs in the child. */
+			int i;
+			unsigned long tmp;
+			for (i = 0; i < H8300_REGS_NO; i++) {
+			    if (get_user(tmp, (unsigned long *) data)) {
+				ret = -EFAULT;
+				break;
+			    }
+			    h8300_put_reg(child, i, tmp);
+			    data += sizeof(long);
+			}
+			ret = 0;
+			break;
+		}
+
+		default:
+			ret = -EIO;
+			break;
+	}
+out_tsk:
+	put_task_struct(child);
+out:
+	unlock_kernel();
+	return ret;
+}
+
+asmlinkage void syscall_trace(void)
+{
+	if (!test_thread_flag(TIF_SYSCALL_TRACE))
+		return;
+	if (!(current->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 (current->exit_code) {
+		send_sig(current->exit_code, current, 1);
+		current->exit_code = 0;
+	}
+}