Patch from Will Schmidt <willschm@us.ibm.com>:jimb-ppc64-linux-20030509-branchcvs/jimb-ppc64-linux-20030509-branch

These changes enable support of PPC64 architecture.
* config/powerpc/ppc64linux.mh: New file.
* config/powerpc/ppc64linux.mt: New file.
* config/powerpc/tm-ppc64linux.h: New file.
* ppc64-linux-tdep.c: New file.
* configure.host: Add clause for powerpc64-*-linux*
* configure.tgt: Add clause for powerpc64-*-linux*
* elfread.c (record_minimal_symbol_and_info): If
DROP_TEXT_NAME_PREFIX_CHAR is #defined, then drop a leading
instance of that char from the names of text symbols.
(elf_symtab_read): If SKIP_DATA_IN_OPD is #defined, ignore data
symbols in the .opd section.
* ppc-linux-nat.c (PTRACE_XFER_TYPE): Change the default for this
to 'long'.
(PPC_PTRACE_POKEUSR_3264, PPC_PTRACE_PEEKUSR_3264,
PPC_PTRACE_POKEDATA_3264, PPC_PTRACE_PEEKDATA_3264): Provide
default definitions for these.
(ARCH64): New macro.
(ppc_wordsize_pid): New function.
(kernel_u_size): Handle 64-bit case.
(ppc_register_u_addr): Same.
(fetch_register): Use the *_3264 requests when
debugging a 64-bit process from a 32-bit GDB.
(store_register): Same.
(GDB_MAX_ALLOCA, child_xfer_memory, udot_info): Copied from
infptrace.c.
(_initialize_ppc_linux_nat): New function, to register our copy of
the udot_info command.
* ppc-linux-tdep.c (TDEP): New macro.
(ppc64_linux_svr4_fetch_link_map_offsets): New function.
(read_memory_addr): Copied from rs6000-tdep.c.
(ppc64_linux_convert_from_func_ptr_addr): New function.
* rs6000-tdep.c (skip_prologue): Recognize more instructions for
saving the 'lr' and 'cr' registers; don't just pre-emptively mask
in the 'st' opcode as soon as we see an 'mflr' or 'mfcr' opcode.
Recognize more instructions for updating the stack pointer, and
loading the TOC pointer.
(registers_powerpc64, registers_a35): New register tables.
(rs6000_gdbarch_init): Register the 64-bit solib functions.
* solib-svr4.c (solib_break_names): If SOLIB_BREAK_NAME is
#defined, include an entry for it.
(enable_break): Call CONVERT_FROM_FUNC_PTR_ADDR when trying to
guess the linker's base address.
* config/powerpc/tm-linux.h
(ppc64_linux_svr4_fetch_link_map_offsets,
ppc64_linux_convert_from_func_ptr_addr): New declarations.

1 files changed, 63 insertions, 0 deletions

diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c
index 9284751fd0c..59930396c0b 100644
--- a/gdb/ppc-linux-tdep.c
+++ b/gdb/ppc-linux-tdep.c
@@ -63,6 +63,8 @@
    offsetof(struct sigcontext_struct, handler) == 0x14 */
 #define PPC_LINUX_HANDLER_PTR_OFFSET (PPC_LINUX_SIGNAL_FRAMESIZE + 0x14)
 
+#define TDEP	gdbarch_tdep (current_gdbarch)
+	
 /* From <asm/ptrace.h>, values for PT_NIP, PT_R1, and PT_LNK */
 #define PPC_LINUX_PT_R0		0
 #define PPC_LINUX_PT_R1		1
@@ -755,3 +757,64 @@ _initialize_ppc_linux_tdep (void)
 			  ppc_linux_init_abi);
   add_core_fns (&ppc_linux_regset_core_fns);
 }
+
+struct link_map_offsets *
+	ppc64_linux_svr4_fetch_link_map_offsets (void)
+{
+    static struct link_map_offsets lmo;
+    static struct link_map_offsets *lmp = NULL;
+
+    if (lmp == NULL)
+    {
+	lmp = &lmo;
+
+	lmo.r_debug_size = 16;/* The actual size is xx bytes, but
+					   this is all we need.  */
+	lmo.r_map_offset = 8;
+	lmo.r_map_size   = 8; 
+	lmo.link_map_size = 40;  /* The actual size is xxx bytes, but
+					   this is all we need.  */
+	lmo.l_addr_offset = 0;
+	lmo.l_addr_size   = 8;
+	lmo.l_name_offset = 8; 
+	lmo.l_name_size   = 8;
+	lmo.l_next_offset = 24;
+	lmo.l_next_size   = 8;
+	lmo.l_prev_offset = 32;
+	lmo.l_prev_size   = 8;
+    }
+
+    return lmp;
+}
+
+
+/* Support for CONVERT_FROM_FUNC_PTR_ADDR(ADDR).
+	   Duplicate of RS6000 function, except ppc64_linux requires relocated address. */
+static CORE_ADDR
+read_memory_addr (CORE_ADDR memaddr, int len)
+{
+    return read_memory_unsigned_integer (memaddr, len);
+}
+	
+	
+CORE_ADDR
+ppc64_linux_convert_from_func_ptr_addr (CORE_ADDR addr)
+{
+    long long my_adder;
+    struct obj_section *s;
+    CORE_ADDR retval;
+    extern struct obj_section *find_pc_section(CORE_ADDR);
+
+	/* this should be the base address that the object (containing the func_ptr_addr) is loaded at. */
+    my_adder = 0x7fe0000000; 
+
+    s = find_pc_section (my_adder + addr);
+    if (s && s->the_bfd_section->flags & SEC_CODE)
+	return addr;
+
+	  /* ADDR is in the data space, so it's a special function pointer. */
+    retval = read_memory_addr (my_adder + addr, TDEP->wordsize);
+	/*  printf("reading 0x%lx ",my_adder+addr); */
+	/*  printf("ppc64...convert_func_ptr addr:0x%lx  new:0x%lx\n",addr,retval); */
+    return retval;
+}