[PATCH] Read arm core files

[Girish Shilamkar <girish@linsyssoft.com>]

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Hi,
	The patch enables gdb to read arm core files.
-Girish.


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 2006-02-15   Girish Shilamkar  <girish@linsyssoft.com>
 
	* arm-linux-tdep.c Core file handler has been added. 
 	* config/arm/linux.mt Compiles corelow.c required for 
	deprecated_add_core_fns	

Index: cvs-6.4/gdb/arm-linux-tdep.c
===================================================================
--- cvs-6.4.orig/gdb/arm-linux-tdep.c	2006-01-15 13:28:58.000000000 -0500
+++ cvs-6.4/gdb/arm-linux-tdep.c	2006-02-15 05:34:38.200467944 -0500
@@ -70,6 +70,18 @@
 #define ARM_LINUX_JB_ELEMENT_SIZE	INT_REGISTER_SIZE
 #define ARM_LINUX_JB_PC			21
 
+/* Following enums used to implement the core file support. */
+enum {
+  ELF_NGREG = 18,      /* core reg size is 72 */
+  ELF_NFPREG = 33,
+  ELF_NVRREG = 33
+};
+
+enum {
+  ELF_GREGSET_SIZE = (ELF_NGREG * 4),
+  ELF_FPREGSET_SIZE = (ELF_NFPREG * 12)        /* FP_REGISTER_SIZE is 12 */
+};
+
 /* Extract from an array REGBUF containing the (raw) register state
    a function return value of type TYPE, and copy that, in virtual format,
    into VALBUF.  */
@@ -372,8 +384,74 @@
 }
 
 void
+arm_linux_supply_gregset (char *buf)
+{
+  int regi;
+  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+  for (regi = 0; regi < 16; regi++)
+    regcache_raw_supply(current_regcache, regi, buf + 4 * regi);
+
+   regcache_raw_supply (current_regcache, ARM_FPS_REGNUM, buf + 4 * 16);
+   regcache_raw_supply (current_regcache, ARM_PS_REGNUM, buf + 4 * 17);
+}
+
+void
+arm_linux_supply_fpregset (char *buf)
+{
+  int regi;
+  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+  for (regi = 0; regi < 32; regi++)
+     regcache_raw_supply (current_regcache, FP0_REGNUM + regi, buf + 8 * regi);
+}
+
+/*
+  Use a local version of this function to get the correct types for regsets.
+*/
+
+static void
+fetch_core_registers (char *core_reg_sect,
+                      unsigned core_reg_size,
+                      int which,
+                      CORE_ADDR reg_addr)
+{
+  if (which == 0)
+    {
+      /* handle Integer register set */
+      if (core_reg_size == ELF_GREGSET_SIZE)
+        arm_linux_supply_gregset (core_reg_sect);
+      else
+        warning ("wrong size gregset struct in core file");
+    }
+  else if (which == 2)
+    {
+      /* handle Floating point register set */
+      if (core_reg_size == ELF_FPREGSET_SIZE)
+        arm_linux_supply_fpregset (core_reg_sect);
+      else
+        warning ("wrong size fpregset struct in core file");
+    }
+}
+
+/* Register that we are able to handle ELF file formats using standard
+   procfs "regset" structures.  */
+
+static struct core_fns arm_linux_regset_core_fns =
+{
+  bfd_target_elf_flavour,       /* core_flavour */
+  default_check_format,         /* check_format */
+  default_core_sniffer,         /* core_sniffer */
+  fetch_core_registers,         /* core_read_registers */
+  NULL                          /* next */
+};
+
+void
 _initialize_arm_linux_tdep (void)
 {
   gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_LINUX,
 			  arm_linux_init_abi);
+
+ /* register core file handling functions */
+ deprecated_add_core_fns (&arm_linux_regset_core_fns);
 }
Index: cvs-6.4/gdb/config/arm/linux.mt
===================================================================
--- cvs-6.4.orig/gdb/config/arm/linux.mt	2005-02-09 10:58:50.000000000 -0500
+++ cvs-6.4/gdb/config/arm/linux.mt	2006-02-15 04:59:40.934300864 -0500
@@ -1,3 +1,3 @@
 # Target: ARM based machine running GNU/Linux
 DEPRECATED_TM_FILE= tm-linux.h
-TDEPFILES= arm-tdep.o arm-linux-tdep.o glibc-tdep.o solib.o solib-svr4.o solib-legacy.o symfile-mem.o
+TDEPFILES= arm-tdep.o arm-linux-tdep.o glibc-tdep.o solib.o solib-svr4.o solib-legacy.o symfile-mem.o corelow.o