Apply 'const' in more places

Many global arrays in gdb could be marked "const" but are not.  This
patch changes some of them.  (There may be other arrays that could
benefit from this treatment.  I only examined arrays of strings.)

This lets the linker move some symbols to the readonly data section.
For example, previously:

0000000000000000 d _ZL18can_use_agent_enum

is now:

0000000000000030 r _ZL18can_use_agent_enum

2020-09-14  Tom Tromey  <tromey@adacore.com>

	* x86-tdep.h (x86_in_indirect_branch_thunk): Update.
	* x86-tdep.c (x86_is_thunk_register_name)
	(x86_in_indirect_branch_thunk): Update.
	* sparc64-tdep.c (sparc64_fpu_register_names)
	(sparc64_cp0_register_names, sparc64_register_names)
	(sparc64_pseudo_register_names): Now const.
	* sparc-tdep.h (struct gdbarch_tdep) <fpu_register_names,
	cp0_registers_num>: Now const.
	* sparc-tdep.c (sparc_core_register_names)
	(sparc32_fpu_register_names, sparc32_cp0_register_names)
	(sparc32_pseudo_register_names): Now const.
	(validate_tdesc_registers): Update.
	* rust-lang.c (rust_extensions): Now const.
	* p-lang.c (p_extensions): Now const.
	* objc-lang.c (objc_extensions): Now const.
	* nto-tdep.c (nto_thread_state_str): Now const.
	* moxie-tdep.c (moxie_register_names): Now const.
	* mips-tdep.h (struct gdbarch_tdep) <mips_processor_reg_names>:
	Now const.
	* mips-tdep.c (mips_generic_reg_names, mips_tx39_reg_names)
	(mips_linux_reg_names): Now const.
	(mips_gdbarch_init): Update.
	* microblaze-tdep.c (microblaze_register_names): Now const.
	* m68k-tdep.c (m68k_register_names): Now const.
	* m32r-tdep.c (m32r_register_names): Now const.
	* ia64-tdep.c (ia64_register_names): Now const.
	* i386-tdep.h (struct gdbarch_tdep) <register_names,
	ymmh_register_names, ymm16h_regnum, mpx_register_names,
	k_register_names, zmmh_register_names, xmm_avx512_register_names,
	ymm_avx512_register_names, pkeys_register_names>: Now const.
	* i386-tdep.c (i386_register_names, i386_zmm_names)
	(i386_zmmh_names, i386_k_names, i386_ymm_names, i386_ymmh_names)
	(i386_mpx_names, i386_pkeys_names, i386_bnd_names)
	(i386_mmx_names, i386_byte_names, i386_word_names): Now const.
	* f-lang.c (f_extensions): Now const.
	* d-lang.c (d_extensions): Now const.
	* csky-tdep.c (csky_register_names): Now const.
	* charset.c (default_charset_names, charset_enum): Now const.
	(_initialize_charset): Update.
	* c-lang.c (c_extensions, cplus_extensions, asm_extensions): Now
	const.
	* bsd-uthread.c (bsd_uthread_solib_names): Now const.
	(bsd_uthread_solib_loaded): Update.
	(bsd_uthread_state): Now const.
	* amd64-tdep.c (amd64_register_names, amd64_ymm_names)
	(amd64_ymm_avx512_names, amd64_ymmh_names)
	(amd64_ymmh_avx512_names, amd64_mpx_names, amd64_k_names)
	(amd64_zmmh_names, amd64_zmm_names, amd64_xmm_avx512_names)
	(amd64_pkeys_names, amd64_byte_names, amd64_word_names)
	(amd64_dword_names): Now const.
	* agent.c (can_use_agent_enum): Now const.
	* ada-tasks.c (task_states, long_task_states): Now const.
	* ada-lang.c (known_runtime_file_name_patterns)
	(known_auxiliary_function_name_patterns, attribute_names)
	(standard_exc, ada_extensions): Now const.

gdbserver/ChangeLog
2020-09-14  Tom Tromey  <tromey@adacore.com>

	* tracepoint.cc (eval_result_names): Now const.
	* ax.cc (gdb_agent_op_names): Now const.

1 files changed, 14 insertions, 14 deletions

diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c
index 59f7c9f..e801f83 100644
--- a/gdb/amd64-tdep.c
+++ b/gdb/amd64-tdep.c
@@ -59,7 +59,7 @@
 
 /* Register information.  */
 
-static const char *amd64_register_names[] = 
+static const char * const amd64_register_names[] = 
 {
   "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "rsp",
 
@@ -77,7 +77,7 @@ static const char *amd64_register_names[] =
   "mxcsr",
 };
 
-static const char *amd64_ymm_names[] = 
+static const char * const amd64_ymm_names[] = 
 {
   "ymm0", "ymm1", "ymm2", "ymm3",
   "ymm4", "ymm5", "ymm6", "ymm7",
@@ -85,7 +85,7 @@ static const char *amd64_ymm_names[] =
   "ymm12", "ymm13", "ymm14", "ymm15"
 };
 
-static const char *amd64_ymm_avx512_names[] =
+static const char * const amd64_ymm_avx512_names[] =
 {
   "ymm16", "ymm17", "ymm18", "ymm19",
   "ymm20", "ymm21", "ymm22", "ymm23",
@@ -93,7 +93,7 @@ static const char *amd64_ymm_avx512_names[] =
   "ymm28", "ymm29", "ymm30", "ymm31"
 };
 
-static const char *amd64_ymmh_names[] = 
+static const char * const amd64_ymmh_names[] = 
 {
   "ymm0h", "ymm1h", "ymm2h", "ymm3h",
   "ymm4h", "ymm5h", "ymm6h", "ymm7h",
@@ -101,7 +101,7 @@ static const char *amd64_ymmh_names[] =
   "ymm12h", "ymm13h", "ymm14h", "ymm15h"
 };
 
-static const char *amd64_ymmh_avx512_names[] =
+static const char * const amd64_ymmh_avx512_names[] =
 {
   "ymm16h", "ymm17h", "ymm18h", "ymm19h",
   "ymm20h", "ymm21h", "ymm22h", "ymm23h",
@@ -109,18 +109,18 @@ static const char *amd64_ymmh_avx512_names[] =
   "ymm28h", "ymm29h", "ymm30h", "ymm31h"
 };
 
-static const char *amd64_mpx_names[] =
+static const char * const amd64_mpx_names[] =
 {
   "bnd0raw", "bnd1raw", "bnd2raw", "bnd3raw", "bndcfgu", "bndstatus"
 };
 
-static const char *amd64_k_names[] =
+static const char * const amd64_k_names[] =
 {
   "k0", "k1", "k2", "k3",
   "k4", "k5", "k6", "k7"
 };
 
-static const char *amd64_zmmh_names[] =
+static const char * const amd64_zmmh_names[] =
 {
   "zmm0h", "zmm1h", "zmm2h", "zmm3h",
   "zmm4h", "zmm5h", "zmm6h", "zmm7h",
@@ -132,7 +132,7 @@ static const char *amd64_zmmh_names[] =
   "zmm28h", "zmm29h", "zmm30h", "zmm31h"
 };
 
-static const char *amd64_zmm_names[] =
+static const char * const amd64_zmm_names[] =
 {
   "zmm0", "zmm1", "zmm2", "zmm3",
   "zmm4", "zmm5", "zmm6", "zmm7",
@@ -144,14 +144,14 @@ static const char *amd64_zmm_names[] =
   "zmm28", "zmm29", "zmm30", "zmm31"
 };
 
-static const char *amd64_xmm_avx512_names[] = {
+static const char * const amd64_xmm_avx512_names[] = {
     "xmm16",  "xmm17",  "xmm18",  "xmm19",
     "xmm20",  "xmm21",  "xmm22",  "xmm23",
     "xmm24",  "xmm25",  "xmm26",  "xmm27",
     "xmm28",  "xmm29",  "xmm30",  "xmm31"
 };
 
-static const char *amd64_pkeys_names[] = {
+static const char * const amd64_pkeys_names[] = {
     "pkru"
 };
 
@@ -298,7 +298,7 @@ amd64_arch_reg_to_regnum (int reg)
 
 /* Register names for byte pseudo-registers.  */
 
-static const char *amd64_byte_names[] =
+static const char * const amd64_byte_names[] =
 {
   "al", "bl", "cl", "dl", "sil", "dil", "bpl", "spl",
   "r8l", "r9l", "r10l", "r11l", "r12l", "r13l", "r14l", "r15l",
@@ -310,7 +310,7 @@ static const char *amd64_byte_names[] =
 
 /* Register names for word pseudo-registers.  */
 
-static const char *amd64_word_names[] =
+static const char * const amd64_word_names[] =
 {
   "ax", "bx", "cx", "dx", "si", "di", "bp", "", 
   "r8w", "r9w", "r10w", "r11w", "r12w", "r13w", "r14w", "r15w"
@@ -318,7 +318,7 @@ static const char *amd64_word_names[] =
 
 /* Register names for dword pseudo-registers.  */
 
-static const char *amd64_dword_names[] =
+static const char * const amd64_dword_names[] =
 {
   "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp", 
   "r8d", "r9d", "r10d", "r11d", "r12d", "r13d", "r14d", "r15d",