Rename cdb to gdbstub and split it into arch dependent/neutral part.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>

1 files changed, 146 insertions, 0 deletions

diff --git a/xen/arch/x86/gdbstub.c b/xen/arch/x86/gdbstub.c
new file mode 100644
index 0000000000..0c34e07fd4
--- /dev/null
+++ b/xen/arch/x86/gdbstub.c
@@ -0,0 +1,146 @@
+/*
+ * x86-specific gdb stub routines
+ * based on x86 cdb(xen/arch/x86/cdb.c), but Extensively modified.
+ * 
+ * Copyright (C) 2006 Isaku Yamahata <yamahata at valinux co jp>
+ *                    VA Linux Systems Japan. K.K.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+#include <asm/debugger.h>
+
+u16
+gdb_arch_signal_num(struct cpu_user_regs *regs, unsigned long cookie)
+{
+    /* XXX */
+    return 1;
+}
+
+void 
+gdb_arch_read_reg_array(struct cpu_user_regs *regs, struct gdb_context *ctx)
+{
+#define GDB_REG(r) gdb_write_to_packet_hex(r, sizeof(r), ctx);
+    GDB_REG(regs->eax);
+    GDB_REG(regs->ecx);
+    GDB_REG(regs->edx);
+    GDB_REG(regs->ebx);
+    GDB_REG(regs->esp);
+    GDB_REG(regs->ebp);
+    GDB_REG(regs->esi);
+    GDB_REG(regs->edi);
+    GDB_REG(regs->eip);
+    GDB_REG(regs->eflags);
+#undef GDB_REG
+#define GDB_SEG_REG(s)  gdb_write_to_packet_hex(s, sizeof(u32), ctx);
+    /* sizeof(segment) = 16bit */
+    /* but gdb requires its return value as 32bit value */
+    GDB_SEG_REG(regs->cs);
+    GDB_SEG_REG(regs->ss);
+    GDB_SEG_REG(regs->ds);
+    GDB_SEG_REG(regs->es);
+    GDB_SEG_REG(regs->fs);
+    GDB_SEG_REG(regs->gs);
+#undef GDB_SEG_REG
+    gdb_send_packet(ctx);
+}
+
+void 
+gdb_arch_write_reg_array(struct cpu_user_regs *regs, const char* buf,
+                         struct gdb_context *ctx)
+{
+    /* XXX TODO */
+    gdb_send_reply("E02", ctx);
+}
+
+void 
+gdb_arch_read_reg(unsigned long regnum, struct cpu_user_regs *regs,
+                  struct gdb_context *ctx)
+{
+    gdb_send_reply("", ctx);
+}
+
+/* Like copy_from_user, but safe to call with interrupts disabled.
+   Trust me, and don't look behind the curtain. */
+unsigned 
+gdb_arch_copy_from_user(void *dest, const void *src, unsigned len)
+{
+    int __d0, __d1, __d2;
+    ASSERT(!local_irq_is_enabled());
+    __asm__ __volatile__(
+        "1: rep; movsb\n"
+        "2:\n"
+        ".section .fixup,\"ax\"\n"
+        "3:     addl $4, %%esp\n"
+        "       jmp 2b\n"
+        ".previous\n"
+        ".section __pre_ex_table,\"a\"\n"
+        "   .align 4\n"
+        "   .long 1b,3b\n"
+        ".previous\n"
+        ".section __ex_table,\"a\"\n"
+        "   .align 4\n"
+        "   .long 1b,2b\n"
+        ".previous\n"
+        : "=c"(__d2), "=D" (__d0), "=S" (__d1)
+        : "0"(len), "1"(dest), "2"(src)
+        : "memory");
+    ASSERT(!local_irq_is_enabled());
+    return __d2;
+}
+
+unsigned int 
+gdb_arch_copy_to_user(void *dest, const void *src, unsigned len)
+{
+    /* XXX  */
+    return len;
+}
+
+void 
+gdb_arch_resume(struct cpu_user_regs *regs,
+                unsigned long addr, unsigned long type,
+                struct gdb_context *ctx)
+{
+    /* XXX */
+    if (type == GDB_STEP) {
+        gdb_send_reply("S01", ctx);
+    }
+}
+
+void
+gdb_arch_print_state(struct cpu_user_regs *regs)
+{
+    /* XXX */
+}
+
+void
+gdb_arch_enter(struct cpu_user_regs *regs)
+{
+    /* nothing */
+}
+
+void
+gdb_arch_exit(struct cpu_user_regs *regs)
+{
+    /* nothing */
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * End:
+ */