patch-gdb-5.2.1-arm7tdmi-20020920

uClinux里自带的gdbserver在arm7tdmi下不能正常工作

diff -urN gdb-5.2.1/gdb/arm-tdep.c arm-elf-gdb-5.2.1/gdb/arm-tdep.c
--- gdb-5.2.1/gdb/arm-tdep.c	Tue Feb 19 20:20:31 2002
+++ arm-elf-gdb-5.2.1/gdb/arm-tdep.c	Fri Sep 20 13:52:49 2002
@@ -1194,8 +1194,12 @@
 {
   if (read_register (ARM_PS_REGNUM) & 0x20)	/* Bit 5 is Thumb state bit */
     return read_register (THUMB_FP_REGNUM);	/* R7 if Thumb */
-  else
-    return read_register (ARM_FP_REGNUM);	/* R11 if ARM */
+  else {
+    CORE_ADDR a;
+    a=read_register (ARM_FP_REGNUM);            /* R11 if ARM */
+    if(a) return a;
+    else return read_sp();  /* if fp is not initialized, use sp as fp */
+  };
 }
 
 /* Store into a struct frame_saved_regs the addresses of the saved
@@ -2081,10 +2085,12 @@
 /* NOTE rearnsha 2002-02-18: for now we allow a non-multi-arch gdb to
    override these definitions.  */
 #ifndef ARM_LE_BREAKPOINT
-#define ARM_LE_BREAKPOINT {0xFE,0xDE,0xFF,0xE7}
+// #define ARM_LE_BREAKPOINT {0xFE,0xDE,0xFF,0xE7}
+#define ARM_LE_BREAKPOINT {0x01,0x00,0x9f,0xEF}
 #endif
 #ifndef ARM_BE_BREAKPOINT
-#define ARM_BE_BREAKPOINT {0xE7,0xFF,0xDE,0xFE}
+// #define ARM_BE_BREAKPOINT {0xE7,0xFF,0xDE,0xFE}
+#define ARM_BE_BREAKPOINT {0xEF,0x9f,0x00,0x01}
 #endif
 #ifndef THUMB_LE_BREAKPOINT
 #define THUMB_LE_BREAKPOINT {0xfe,0xdf}
diff -urN gdb-5.2.1/gdb/config/arm/tm-embed.h arm-elf-gdb-5.2.1/gdb/config/arm/tm-embed.h
--- gdb-5.2.1/gdb/config/arm/tm-embed.h	Tue Feb 26 15:23:12 2002
+++ arm-elf-gdb-5.2.1/gdb/config/arm/tm-embed.h	Fri Sep 20 00:58:05 2002
@@ -27,7 +27,7 @@
 
 /* The remote stub should be able to single-step. */
 #undef SOFTWARE_SINGLE_STEP_P
-#define SOFTWARE_SINGLE_STEP_P() 0
+#define SOFTWARE_SINGLE_STEP_P() 1
 
 /* The first 0x20 bytes are the trap vectors.  */
 #undef LOWEST_PC
diff -urN gdb-5.2.1/gdb/gdbserver/linux-low.c arm-elf-gdb-5.2.1/gdb/gdbserver/linux-low.c
--- gdb-5.2.1/gdb/gdbserver/linux-low.c	Thu Mar  7 21:56:18 2002
+++ arm-elf-gdb-5.2.1/gdb/gdbserver/linux-low.c	Fri Sep 20 13:53:35 2002
@@ -49,6 +49,23 @@
 extern int regmap[];
 #endif
 
+void send_area(char* buf) {
+
+  unsigned int x;
+  unsigned int code_start = ptrace (PTRACE_PEEKUSER, inferior_pid,
+				    (PTRACE_ARG3_TYPE) 49*4, 0);
+  unsigned int data_start = ptrace (PTRACE_PEEKUSER, inferior_pid,
+				    (PTRACE_ARG3_TYPE) 50*4, 0);
+  unsigned int bss_start = data_start;
+  unsigned int code_end = ptrace(PTRACE_PEEKUSER, inferior_pid,
+				 (PTRACE_ARG3_TYPE) 51*4, 0);
+  
+  printf("code at %p - %p, data at %p\n", code_start, code_end, data_start);
+
+  x = data_start - (code_end - code_start);
+  sprintf(buf,"Text=%x;Data=%x;Bss=%x;", code_start, x, x);
+};
+
 /* Start an inferior process and returns its pid.
    ALLARGS is a vector of program-name and args. */
 
@@ -57,7 +74,7 @@
 {
   int pid;
 
-  pid = fork ();
+  pid = vfork();
   if (pid < 0)
     perror_with_name ("fork");
 
diff -urN gdb-5.2.1/gdb/gdbserver/server.c arm-elf-gdb-5.2.1/gdb/gdbserver/server.c
--- gdb-5.2.1/gdb/gdbserver/server.c	Fri Mar 29 20:03:34 2002
+++ arm-elf-gdb-5.2.1/gdb/gdbserver/server.c	Fri Sep 20 13:36:18 2002
@@ -188,6 +188,19 @@
 	      else
 		write_enn (own_buf);
 	      break;
+	    case 'q':
+	      switch (own_buf[1]) {
+		  case 'C':
+	      		own_buf[0] = '\0';
+		  	break;
+		  case 'O':
+		        send_area(own_buf);
+		        break;
+		  default:
+	      		own_buf[0] = '\0';
+		  	break;
+	      }
+	      break;
 	    case 'C':
 	      convert_ascii_to_int (own_buf + 1, &sig, 1);
 	      if (target_signal_to_host_p (sig))