Gdbserver support of orig_r0 on ARM

[Zhu Tom-a2289c]

Hi,

 

I am meeting a problem that orig_r0 is overwritten by gdbserver(gdb 6.3) on ARM.

It is because store_register/store_regs (in arm-linux-nat.c) set register with ptrace(PTRACE_SETREGS ...)

 

But as orig_r0 is not mapped by gdbserver, it will be overwritten.

This lost of orig_r0 will prevent the interrupted system call from being restarted.

 

I am new to gdbserver, so not sure whether this patch is correct,

 

arm-linux-nat.c:

 

-#define arm_num_regs 26
+#define arm_num_regs 27
 
 static int arm_regmap[] = {
   0, 4, 8, 12, 16, 20, 24, 28,
   32, 36, 40, 44, 48, 52, 56, 60,
  -1, -1, -1, -1, -1, -1, -1, -1, -1,
-  64

+  64, 68
 };

 

Thanks,

Tom