Le Vendredi 21 Juillet 2006 12:14, Akio Takebe a écrit :
Hi,
This patch support domU of coredump on ia64.
xen_panic_event() is registered to panic_notifier_list,
and xen_panic_event() call HYPERVISOR_shutdown(SHUTDOWN_crash)
at panic time.
If xend notify crashed status, xend call dumpCore()
and create domU's core in /var/xen/dump.
Signed-off-by: Akio Takebe [EMAIL PROTECTED]
I tested the following step
(I used a attached crash.c to panic domU.)
1. xm create -c domU
2. insmod crash.ko (in domU)
3. checked /var/xen/dump and there was domU's core.
I check domU's core by using size and strings.
Hi Akio and everyone!
recently I started to work on debugger. Attached is the current work.
I was able to stop a domain and disp under gdb the current ip.
Backtrace is not working. I suppose it requires the ar.bsp value which has to
be computed.
Also I didn't try on core images.
I am not yet planning to continue this work now. If anyone wants to continue
please tell.
Tristan.
diff -r b2abc70be89e tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/configure.srv
--- a/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/configure.srv Wed Jul 19 07:17:54 2006 -0600
+++ b/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/configure.srv Fri Jul 21 11:56:08 2006 +0200
@@ -30,7 +30,7 @@ case ${target} in
srv_linux_thread_db=yes
;;
ia64-*-linux*) srv_regobj=reg-ia64.o
- srv_tgtobj=linux-low.o linux-ia64-low.o
+ srv_tgtobj=linux-xen-low.o linux-ia64-low.o
srv_linux_usrregs=yes
;;
m68*-*-linux*) srv_regobj=reg-m68k.o
diff -r b2abc70be89e tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/linux-xen-low.c
--- a/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/linux-xen-low.c Wed Jul 19 07:17:54 2006 -0600
+++ b/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/linux-xen-low.c Fri Jul 21 11:56:08 2006 +0200
@@ -37,6 +37,7 @@
#include errno.h
#include xenctrl.h
#include thread_db.h
+#define XC_PTRACE_PRIVATE
#include xc_ptrace.h
#define TRACE_ENTER /* printf(enter %s\n, __FUNCTION__) */
@@ -68,7 +69,6 @@ static int expect_signal = 0;
static int expect_signal = 0;
static int signal_to_send = 0;
static void linux_resume (struct thread_resume *resume_info);
-static void linux_set_inferior (void);
int debug_threads;
int using_threads;
@@ -83,45 +83,15 @@ struct pending_signals
#define PTRACE_ARG3_TYPE long
#define PTRACE_XFER_TYPE long
+#ifdef HAVE_LINUX_REGSETS
static int use_regsets_p = 1;
+#endif
#define pid_of(proc) ((proc)-head.id)
/* FIXME: Delete eventually. */
#define inferior_pid (pid_of (get_thread_process (current_inferior)))
-
-/* This function should only be called if the process got a SIGTRAP.
- The SIGTRAP could mean several things.
-
- On i386, where decr_pc_after_break is non-zero:
- If we were single-stepping this process using PTRACE_SINGLESTEP,
- we will get only the one SIGTRAP (even if the instruction we
- stepped over was a breakpoint). The value of $eip will be the
- next instruction.
- If we continue the process using PTRACE_CONT, we will get a
- SIGTRAP when we hit a breakpoint. The value of $eip will be
- the instruction after the breakpoint (i.e. needs to be
- decremented). If we report the SIGTRAP to GDB, we must also
- report the undecremented PC. If we cancel the SIGTRAP, we
- must resume at the decremented PC.
-
- (Presumably, not yet tested) On a non-decr_pc_after_break machine
- with hardware or kernel single-step:
- If we single-step over a breakpoint instruction, our PC will
- point at the following instruction. If we continue and hit a
- breakpoint instruction, our PC will point at the breakpoint
- instruction. */
-static CORE_ADDR
-get_stop_pc (void)
-{
- CORE_ADDR stop_pc = (*the_low_target.get_pc) ();
-
- if (get_thread_process (current_inferior)-stepping)
-return stop_pc;
- else
-return stop_pc - the_low_target.decr_pc_after_break;
-}
static void *
add_process (int pid, long tid)
@@ -252,6 +222,7 @@ linux_resume (struct thread_resume *resu
}
+#ifdef HAVE_LINUX_REGSETS
static int
regsets_fetch_inferior_registers ()
{
@@ -355,29 +326,126 @@ regsets_store_inferior_registers ()
}
return 0;
}
-
-
+#endif /* HAVE_LINUX_REGSETS */
+
+#ifdef HAVE_LINUX_USRREGS
+
+static int
+register_addr (int regnum)
+{
+ int addr;
+
+ if (regnum 0 || regnum = the_low_target.num_regs)
+error (Invalid register number %d., regnum);
+
+ addr = the_low_target.regmap[regnum];
+
+ return addr;
+}
+
+/* Fetch one register. */
+static void
+fetch_register (int regno, struct gdb_regs *regs)
+{
+ CORE_ADDR regaddr;
+
+ regaddr = register_addr (regno);
+ if (regaddr == -1)
+return;
+ fprintf (stderr, fetch_register %d : off=%d = %016lx\n,
+ regno, regaddr, *((unsigned long *)((char *)regs + regaddr)));
+ supply_register (regno, (char *)regs + regaddr);
+}
+
+/* Fetch all registers, or just one, from the child process. */
+static
