2004-03-15 Andrew Cagney <cagney@redhat.com>

2004-03-15  Andrew Cagney  <cagney@redhat.com>

	* ppc-tdep.h: Update copyright.
	(ppc_linux_supply_gregset, ppc_linux_supply_fpregset): Change
	function signatures to match "regsets.h".
	* ppc-linux-tdep.c: Include "regset.h".
	(ELF_GREGSET_SIZE): Delete.
	(right_supply_register): New function.
	(ppc_linux_supply_fpregset, ppc_linux_supply_gregset): Rewrite
	using right_supply_register.
	(ppc32_linux_supply_gregset, ppc64_linux_supply_gregset): New
	functions.
	(ppc64_linux_gregset, ppc32_linux_gregset): Define.
	(ppc_linux_init_abi): Register ppc_linux_regset_from_core_section.
	(_initialize_ppc_linux_tdep): Do not register
	ppc_linux_regset_core_fns.
	(ppc_linux_regset_from_core_section): Replace
	fetch_core_registers.
	(ppc_linux_regset_core_fns): Delete.
	* ppc-linux-nat.c: (right_fill_reg): New function.
	(supply_gregset): Update call to ppc_linux_supply_gregset.
	(fill_gregset): Clear the register set, use right_fill_reg.
	(supply_fpregset): Update call to ppc_linux_supply_fpregset.
	(fill_fpregset): Use right_fill_reg, correctly compute FP offsets.

Index: ppc-linux-nat.c
===================================================================
RCS file: /cvs/src/src/gdb/ppc-linux-nat.c,v
retrieving revision 1.28
diff -u -r1.28 ppc-linux-nat.c
--- ppc-linux-nat.c	8 Mar 2004 01:45:02 -0000	1.28
+++ ppc-linux-nat.c	15 Mar 2004 21:28:31 -0000
@@ -507,7 +507,24 @@
 void
 supply_gregset (gdb_gregset_t *gregsetp)
 {
-  ppc_linux_supply_gregset ((char *) gregsetp);
+  /* NOTE: cagney/2003-11-25: This is the word size used by the ptrace
+     interface, and not the wordsize of the program's ABI.  */
+  int wordsize = sizeof (PTRACE_XFER_TYPE);
+  ppc_linux_supply_gregset (current_regcache, -1, gregsetp,
+			    sizeof (gdb_gregset_t), wordsize);
+}
+
+static void
+right_fill_reg (int regnum, void *reg)
+{
+  /* NOTE: cagney/2003-11-25: This is the word size used by the ptrace
+     interface, and not the wordsize of the program's ABI.  */
+  int wordsize = sizeof (PTRACE_XFER_TYPE);
+  /* Right fill the register.  */
+  regcache_raw_collect (current_regcache, regnum,
+			((bfd_byte *) reg
+			 + wordsize
+			 - register_size (current_gdbarch, regnum)));
 }

 void
@@ -516,36 +533,42 @@
   int regi;
   elf_greg_t *regp = (elf_greg_t *) gregsetp;
   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+  const int elf_ngreg = 48;
+
+
+  /* Start with zeros.  */
+  memset (regp, 0, elf_ngreg * sizeof (*regp));

   for (regi = 0; regi < 32; regi++)
     {
       if ((regno == -1) || regno == regi)
-        regcache_collect (regi, regp + PT_R0 + regi);
+	right_fill_reg (regi, (regp + PT_R0 + regi));
     }

   if ((regno == -1) || regno == PC_REGNUM)
-    regcache_collect (PC_REGNUM, regp + PT_NIP);
+    right_fill_reg (PC_REGNUM, regp + PT_NIP);
   if ((regno == -1) || regno == tdep->ppc_lr_regnum)
-    regcache_collect (tdep->ppc_lr_regnum, regp + PT_LNK);
+    right_fill_reg (tdep->ppc_lr_regnum, regp + PT_LNK);
   if ((regno == -1) || regno == tdep->ppc_cr_regnum)
     regcache_collect (tdep->ppc_cr_regnum, regp + PT_CCR);
   if ((regno == -1) || regno == tdep->ppc_xer_regnum)
     regcache_collect (tdep->ppc_xer_regnum, regp + PT_XER);
   if ((regno == -1) || regno == tdep->ppc_ctr_regnum)
-    regcache_collect (tdep->ppc_ctr_regnum, regp + PT_CTR);
+    right_fill_reg (tdep->ppc_ctr_regnum, regp + PT_CTR);
 #ifdef PT_MQ
   if (((regno == -1) || regno == tdep->ppc_mq_regnum)
       && (tdep->ppc_mq_regnum != -1))
-    regcache_collect (tdep->ppc_mq_regnum, regp + PT_MQ);
+    right_fill_reg (tdep->ppc_mq_regnum, regp + PT_MQ);
 #endif
   if ((regno == -1) || regno == tdep->ppc_ps_regnum)
-    regcache_collect (tdep->ppc_ps_regnum, regp + PT_MSR);
+    right_fill_reg (tdep->ppc_ps_regnum, regp + PT_MSR);
 }

 void
 supply_fpregset (gdb_fpregset_t * fpregsetp)
 {
-  ppc_linux_supply_fpregset ((char *) fpregsetp);
+  ppc_linux_supply_fpregset (NULL, current_regcache, -1, fpregsetp,
+			     sizeof (gdb_fpregset_t));
 }

 /* Given a pointer to a floating point register set in /proc format
@@ -557,12 +580,13 @@
 {
   int regi;
   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+  bfd_byte *fpp = (void *) fpregsetp;

   for (regi = 0; regi < 32; regi++)
     {
       if ((regno == -1) || (regno == FP0_REGNUM + regi))
-	regcache_collect (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
+	regcache_collect (FP0_REGNUM + regi, fpp + 8 * regi);
     }
   if ((regno == -1) || regno == tdep->ppc_fpscr_regnum)
-    regcache_collect (tdep->ppc_fpscr_regnum, (char *) (*fpregsetp + regi));
+    right_fill_reg (tdep->ppc_fpscr_regnum, (fpp + 8 * 32));
 }
Index: ppc-linux-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/ppc-linux-tdep.c,v
retrieving revision 1.50
diff -u -r1.50 ppc-linux-tdep.c
--- ppc-linux-tdep.c	16 Feb 2004 21:49:22 -0000	1.50
+++ ppc-linux-tdep.c	15 Mar 2004 21:28:31 -0000
@@ -32,7 +32,7 @@
 #include "regcache.h"
 #include "value.h"
 #include "osabi.h"
-
+#include "regset.h"
 #include "solib-svr4.h"
 #include "ppc-tdep.h"

@@ -959,81 +959,114 @@
 };

 enum {
-  ELF_GREGSET_SIZE = (ELF_NGREG * 4),
   ELF_FPREGSET_SIZE = (ELF_NFPREG * 8)
 };

+static void
+right_supply_register (struct regcache *regcache, int wordsize, int regnum,
+		       const bfd_byte *buf)
+{
+  regcache_raw_supply (regcache, regnum,
+		       (buf + wordsize
+			- register_size (current_gdbarch, regnum)));
+}
+
+/* Extract the register values found in the WORDSIZED ABI GREGSET,
+   storing their values in REGCACHE.  Note that some are left-aligned,
+   while others are right aligned.  */
+
 void
-ppc_linux_supply_gregset (char *buf)
+ppc_linux_supply_gregset (struct regcache *regcache,
+			  int regnum, const void *gregs, size_t size,
+			  int wordsize)
 {
   int regi;
-  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+  struct gdbarch *regcache_arch = get_regcache_arch (regcache);
+  struct gdbarch_tdep *regcache_tdep = gdbarch_tdep (regcache_arch);
+  const bfd_byte *buf = gregs;

   for (regi = 0; regi < 32; regi++)
-    supply_register (regi, buf + 4 * regi);
+    right_supply_register (regcache, wordsize, regi, buf + wordsize * regi);
+
+  right_supply_register (regcache, wordsize, gdbarch_pc_regnum (regcache_arch),
+			 buf + wordsize * PPC_LINUX_PT_NIP);
+  right_supply_register (regcache, wordsize, regcache_tdep->ppc_lr_regnum,
+			 buf + wordsize * PPC_LINUX_PT_LNK);
+  regcache_raw_supply (regcache, regcache_tdep->ppc_cr_regnum,
+		       buf + wordsize * PPC_LINUX_PT_CCR);
+  regcache_raw_supply (regcache, regcache_tdep->ppc_xer_regnum,
+		       buf + wordsize * PPC_LINUX_PT_XER);
+  regcache_raw_supply (regcache, regcache_tdep->ppc_ctr_regnum,
+		       buf + wordsize * PPC_LINUX_PT_CTR);
+  if (regcache_tdep->ppc_mq_regnum != -1)
+    right_supply_register (regcache, wordsize, regcache_tdep->ppc_mq_regnum,
+			   buf + wordsize * PPC_LINUX_PT_MQ);
+  right_supply_register (regcache, wordsize, regcache_tdep->ppc_ps_regnum,
+			 buf + wordsize * PPC_LINUX_PT_MSR);
+}

-  supply_register (PC_REGNUM, buf + 4 * PPC_LINUX_PT_NIP);
-  supply_register (tdep->ppc_lr_regnum, buf + 4 * PPC_LINUX_PT_LNK);
-  supply_register (tdep->ppc_cr_regnum, buf + 4 * PPC_LINUX_PT_CCR);
-  supply_register (tdep->ppc_xer_regnum, buf + 4 * PPC_LINUX_PT_XER);
-  supply_register (tdep->ppc_ctr_regnum, buf + 4 * PPC_LINUX_PT_CTR);
-  if (tdep->ppc_mq_regnum != -1)
-    supply_register (tdep->ppc_mq_regnum, buf + 4 * PPC_LINUX_PT_MQ);
-  supply_register (tdep->ppc_ps_regnum, buf + 4 * PPC_LINUX_PT_MSR);
+static void
+ppc32_linux_supply_gregset (const struct regset *regset,
+			    struct regcache *regcache,
+			    int regnum, const void *gregs, size_t size)
+{
+  ppc_linux_supply_gregset (regcache, regnum, gregs, size, 4);
 }

+static struct regset ppc32_linux_gregset = {
+  NULL, ppc32_linux_supply_gregset
+};
+
+static void
+ppc64_linux_supply_gregset (const struct regset *regset,
+			    struct regcache * regcache,
+			    int regnum, const void *gregs, size_t size)
+{
+  ppc_linux_supply_gregset (regcache, regnum, gregs, size, 8);
+}
+
+static struct regset ppc64_linux_gregset = {
+  NULL, ppc64_linux_supply_gregset
+};
+
 void
-ppc_linux_supply_fpregset (char *buf)
+ppc_linux_supply_fpregset (const struct regset *regset,
+			   struct regcache * regcache,
+			   int regnum, const void *fpset, size_t size)
 {
   int regi;
-  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+  struct gdbarch *regcache_arch = get_regcache_arch (regcache);
+  struct gdbarch_tdep *regcache_tdep = gdbarch_tdep (regcache_arch);
+  const bfd_byte *buf = fpset;

   for (regi = 0; regi < 32; regi++)
-    supply_register (FP0_REGNUM + regi, buf + 8 * regi);
+    regcache_raw_supply (regcache, FP0_REGNUM + regi, buf + 8 * regi);

   /* The FPSCR is stored in the low order word of the last doubleword in the
      fpregset.  */
-  supply_register (tdep->ppc_fpscr_regnum, buf + 8 * 32 + 4);
+  regcache_raw_supply (regcache, regcache_tdep->ppc_fpscr_regnum,
+		       buf + 8 * 32 + 4);
 }

-/*
-  Use a local version of this function to get the correct types for regsets.
-*/
+static struct regset ppc_linux_fpregset = { NULL, ppc_linux_supply_fpregset };

-static void
-fetch_core_registers (char *core_reg_sect,
-		      unsigned core_reg_size,
-		      int which,
-		      CORE_ADDR reg_addr)
+static const struct regset *
+ppc_linux_regset_from_core_section (struct gdbarch *core_arch,
+				    const char *sect_name, size_t sect_size)
 {
-  if (which == 0)
+  struct gdbarch_tdep *tdep = gdbarch_tdep (core_arch);
+  if (strcmp (sect_name, ".reg") == 0)
     {
-      if (core_reg_size == ELF_GREGSET_SIZE)
-	ppc_linux_supply_gregset (core_reg_sect);
+      if (tdep->wordsize == 4)
+	return &ppc32_linux_gregset;
       else
-	warning ("wrong size gregset struct in core file");
-    }
-  else if (which == 2)
-    {
-      if (core_reg_size == ELF_FPREGSET_SIZE)
-	ppc_linux_supply_fpregset (core_reg_sect);
-      else
-	warning ("wrong size fpregset struct in core file");
+	return &ppc64_linux_gregset;
     }
+  if (strcmp (sect_name, ".reg2") == 0)
+    return &ppc_linux_fpregset;
+  return NULL;
 }

-/* Register that we are able to handle ELF file formats using standard
-   procfs "regset" structures.  */
-
-static struct core_fns ppc_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 */
-};
-
 static void
 ppc_linux_init_abi (struct gdbarch_info info,
                     struct gdbarch *gdbarch)
@@ -1086,6 +1119,7 @@
       /* PPC64 malloc's entry-point is called ".malloc".  */
       set_gdbarch_name_of_malloc (gdbarch, ".malloc");
     }
+  set_gdbarch_regset_from_core_section (gdbarch, ppc_linux_regset_from_core_section);
 }

 void
@@ -1099,5 +1133,4 @@
                          ppc_linux_init_abi);
   gdbarch_register_osabi (bfd_arch_rs6000, bfd_mach_rs6k, GDB_OSABI_LINUX,
                          ppc_linux_init_abi);
-  add_core_fns (&ppc_linux_regset_core_fns);
 }
Index: ppc-tdep.h
===================================================================
RCS file: /cvs/src/src/gdb/ppc-tdep.h,v
retrieving revision 1.25
diff -u -r1.25 ppc-tdep.h
--- ppc-tdep.h	10 Nov 2003 22:47:28 -0000	1.25
+++ ppc-tdep.h	15 Mar 2004 21:28:31 -0000
@@ -1,6 +1,7 @@
 /* Target-dependent code for GDB, the GNU debugger.
-   Copyright 2000, 2001, 2002, 2003
-   Free Software Foundation, Inc.
+
+   Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation,
+   Inc.

    This file is part of GDB.

@@ -62,8 +63,12 @@
 						    CORE_ADDR bpaddr);
 int ppc_linux_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache);
 struct link_map_offsets *ppc_linux_svr4_fetch_link_map_offsets (void);
-void ppc_linux_supply_gregset (char *buf);
-void ppc_linux_supply_fpregset (char *buf);
+void ppc_linux_supply_gregset (struct regcache *regcache,
+			       int regnum, const void *gregs, size_t size,
+			       int wordsize);
+void ppc_linux_supply_fpregset (const struct regset *regset,
+				struct regcache *regcache,
+				int regnum, const void *gregs, size_t size);

 enum return_value_convention ppc64_sysv_abi_return_value (struct gdbarch *gdbarch,
 							  struct type *valtype,