Use gdb_byte for bytes from the program being debugged.

gdb_byte should be used for bytes from the program being debugged.  We
have many places using char or unsigned char instead all over the
existing ports, and more ends up added over time due to copy/paste as
new code is based on old code.

I've greped the tree for "char buf[", and fixed all I found.

Tested by building with --enable-targets=all.

2013-03-01  Pedro Alves  <palves@redhat.com>

	Use gdb_byte for bytes from the program being debugged.

	* arm-tdep.c (arm_store_return_value, arm_get_longjmp_target):
	Change type of local 'buf' to gdb_byte.
	* avr-tdep.c (avr_frame_prev_register, avr_push_dummy_call): Likewise.
	* bfin-tdep.c (bfin_push_dummy_call): Likewise.
	* cris-tdep.c (cris_sigcontext_addr)
	(cris_sigtramp_frame_unwind_cache): Likewise.
	* frv-linux-tdep.c (frv_linux_pc_in_sigtramp)
	(frv_linux_sigcontext_reg_addr, frv_linux_sigtramp_frame_cache):
	Likewise.
	* frv-tdep.c (frv_pseudo_register_write, frv_analyze_prologue): Likewise.
	* hppa-hpux-tdep.c (hppa32_hpux_find_global_pointer)
	(hppa32_hpux_search_dummy_call_sequence)
	(hppa_hpux_supply_save_state): Likewise.
	* hppa-linux-tdep.c (insns_match_pattern)
	(hppa_linux_find_global_pointer): Likewise.
	* hppa-tdep.c (hppa_in_function_epilogue_p)
	(skip_prologue_hard_way, hppa_frame_cache): Likewise.
	* i386-nto-tdep.c (i386nto_sigcontext_addr): Likewise.
	* i386fbsd-tdep.c (i386fbsd_supply_uthread)
	(i386fbsd_collect_uthread): Likewise.
	* ia64-hpux-tdep.c (ia64_hpux_push_dummy_code): Likewise.
	* ia64-linux-tdep.c (ia64_linux_sigcontext_register_address): Likewise.
	* ia64-tdep.c (examine_prologue, ia64_frame_cache)
	(ia64_frame_prev_register, ia64_sigtramp_frame_cache)
	(ia64_sigtramp_frame_prev_register, ia64_access_reg)
	(ia64_access_rse_reg, ia64_libunwind_frame_this_id)
	(ia64_libunwind_frame_prev_register)
	(ia64_libunwind_sigtramp_frame_this_id)
	(ia64_find_global_pointer_from_dynamic_section)
	(find_extant_func_descr, find_func_descr, ia64_dummy_id)
	(ia64_unwind_pc): Likewise.
	* iq2000-tdep.c (iq2000_store_return_value): Likewise.
	* m68hc11-tdep.c (m68hc11_push_dummy_call)
	(m68hc11_extract_return_value): Likewise.
	* m68klinux-nat.c (fetch_register, store_register): Likewise.
	* mep-tdep.c (mep_pseudo_cr32_read, mep_pseudo_cr32_write)
	(mep_get_insn, mep_push_dummy_call): Likewise.
	* mips-linux-tdep.c (mips_linux_get_longjmp_target)
	(mips_linux_in_dynsym_stub): Likewise.
	* mn10300-tdep.c (mep_pseudo_cr32_write): Likewise.
	* ppc-linux-nat.c (fetch_register, store_register): Likewise.
	* regcache.c (dump_endian_bytes): Change type of parameter 'buf'
	to gdb_byte.
	* remote-mips.c (mips_set_register): Likewise.
	* remote-sim.c (gdbsim_fetch_register): Likewise.
	* score-tdep.c (score7_fetch_inst): Change type of parameter
	'memblock' and local 'buf' to gdb_byte.
	(score7_malloc_and_get_memblock): Change return type to gdb_byte.
	Change type of local 'buf' to gdb_byte.  Adjust.
	(score7_adjust_memblock_ptr): Change type of parameter 'memblock'
	to gdb_byte**.
	(score7_analyze_prologue): Change type of 'memblock' and
	'memblock_ptr' locals to gdb_byte*.
	* sh64-tdep.c (sh64_extract_return_value)
	(sh64_store_return_value): Change type of local 'buf' to gdb_byte.
	* solib-darwin.c (darwin_current_sos, darwin_read_exec_load_addr):
	* solib-pa64.c (pa64_solib_create_inferior_hook)
	(pa64_open_symbol_file_object): Remove local 'buf'.
	* solib-som.c (som_solib_create_inferior_hook, link_map_start)
	(som_open_symbol_file_object): Likewise.
	* solib-spu.c (spu_current_sos): Likewise.
	* spu-linux-nat.c (spu_fetch_inferior_registers): Likewise.
	* spu-multiarch.c (parse_spufs_run, spu_fetch_registers)
	(spu_store_registers): Likewise.
	* target.c (debug_print_register): Likewise.
	* tic6x-tdep.c (tic6x_get_longjmp_target): Likewise.
	* xstormy16-tdep.c (xstormy16_store_return_value)
	(xstormy16_push_dummy_call, xstormy16_resolve_jmp_table_entry)
	(xstormy16_find_jmp_table_entry): Likewise.

gdb/ia64-linux-tdep.c

@@ -54,7 +54,7 @@ ia64_linux_sigcontext_register_address (struct gdbarch *gdbarch,
 					CORE_ADDR sp, int regno)
 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-  char buf[8];
+  gdb_byte buf[8];
   CORE_ADDR sigcontext_addr = 0;
 
   /* The address of the sigcontext area is found at offset 16 in the