Generate c for feature instead of tdesc

This patch changes Makefile and command "maint print c-files" so
that GDB can print c files for features instead target description.
Previously, we feed GDB a target description xml file, which generate
c files including multiple features.

With this patch, in Makefile, we wrap each feature xml file, and
create a temp target description which include only one feature.
Then, adjust the target description printer for them, and print
a c function for each given feature, so that we can use these
c functions later to create target description in a flexible way.

gdb:

2017-07-26  Yao Qi  <yao.qi@linaro.org>

	* features/Makefile (CFILES): Rename with TDESC_CFILES.
	(FEATURE_XMLFILES): New.
	(FEATURE_CFILES): New.
	New rules.
	(clean-cfiles): Remove generated c files.
	* features/i386/32bit-avx.c: Generated.
 	* features/i386/32bit-avx512.c: Generated.
 	* features/i386/32bit-core.c: Generated.
 	* features/i386/32bit-linux.c: Generated.
 	* features/i386/32bit-mpx.c: Generated.
 	* features/i386/32bit-pkeys.c: Generated.
 	* features/i386/32bit-sse.c: Generated.
 	* target-descriptions.c: Include algorithm.
	(tdesc_element_visitor): Add method visit_end.
	(print_c_tdesc): Implement visit_end.
	(print_c_tdesc:: m_filename_after_features): Move it to
	protected.
	(print_c_feature): New class.
	(maint_print_c_tdesc_cmd): Use print_c_feature if XML file
	name starts with "i386/32bit-".

7 files changed, 273 insertions, 0 deletions

diff --git a/gdb/features/i386/32bit-avx.c b/gdb/features/i386/32bit-avx.c
new file mode 100644
index 0000000..0e71515
--- /dev/null
+++ b/gdb/features/i386/32bit-avx.c
@@ -0,0 +1,21 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: 32bit-avx.xml */
+
+#include "target-descriptions.h"
+
+static int
+create_feature_i386_32bit_avx (struct target_desc *result, long regnum)
+{
+  struct tdesc_feature *feature;
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.i386.avx");
+  tdesc_create_reg (feature, "ymm0h", regnum++, 1, NULL, 128, "uint128");
+  tdesc_create_reg (feature, "ymm1h", regnum++, 1, NULL, 128, "uint128");
+  tdesc_create_reg (feature, "ymm2h", regnum++, 1, NULL, 128, "uint128");
+  tdesc_create_reg (feature, "ymm3h", regnum++, 1, NULL, 128, "uint128");
+  tdesc_create_reg (feature, "ymm4h", regnum++, 1, NULL, 128, "uint128");
+  tdesc_create_reg (feature, "ymm5h", regnum++, 1, NULL, 128, "uint128");
+  tdesc_create_reg (feature, "ymm6h", regnum++, 1, NULL, 128, "uint128");
+  tdesc_create_reg (feature, "ymm7h", regnum++, 1, NULL, 128, "uint128");
+  return regnum;
+}
diff --git a/gdb/features/i386/32bit-avx512.c b/gdb/features/i386/32bit-avx512.c
new file mode 100644
index 0000000..034f557
--- /dev/null
+++ b/gdb/features/i386/32bit-avx512.c
@@ -0,0 +1,33 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: 32bit-avx512.xml */
+
+#include "target-descriptions.h"
+
+static int
+create_feature_i386_32bit_avx512 (struct target_desc *result, long regnum)
+{
+  struct tdesc_feature *feature;
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.i386.avx512");
+  struct tdesc_type *field_type;
+  field_type = tdesc_named_type (feature, "uint128");
+  tdesc_create_vector (feature, "v2ui128", field_type, 2);
+
+  tdesc_create_reg (feature, "k0", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "k1", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "k2", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "k3", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "k4", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "k5", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "k6", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "k7", regnum++, 1, NULL, 64, "uint64");
+  tdesc_create_reg (feature, "zmm0h", regnum++, 1, NULL, 256, "v2ui128");
+  tdesc_create_reg (feature, "zmm1h", regnum++, 1, NULL, 256, "v2ui128");
+  tdesc_create_reg (feature, "zmm2h", regnum++, 1, NULL, 256, "v2ui128");
+  tdesc_create_reg (feature, "zmm3h", regnum++, 1, NULL, 256, "v2ui128");
+  tdesc_create_reg (feature, "zmm4h", regnum++, 1, NULL, 256, "v2ui128");
+  tdesc_create_reg (feature, "zmm5h", regnum++, 1, NULL, 256, "v2ui128");
+  tdesc_create_reg (feature, "zmm6h", regnum++, 1, NULL, 256, "v2ui128");
+  tdesc_create_reg (feature, "zmm7h", regnum++, 1, NULL, 256, "v2ui128");
+  return regnum;
+}
diff --git a/gdb/features/i386/32bit-core.c b/gdb/features/i386/32bit-core.c
new file mode 100644
index 0000000..b43de4d
--- /dev/null
+++ b/gdb/features/i386/32bit-core.c
@@ -0,0 +1,66 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: 32bit-core.xml */
+
+#include "target-descriptions.h"
+
+static int
+create_feature_i386_32bit_core (struct target_desc *result, long regnum)
+{
+  struct tdesc_feature *feature;
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.i386.core");
+  struct tdesc_type *field_type;
+  struct tdesc_type *type;
+  type = tdesc_create_flags (feature, "i386_eflags", 4);
+  tdesc_add_flag (type, 0, "CF");
+  tdesc_add_flag (type, 1, "");
+  tdesc_add_flag (type, 2, "PF");
+  tdesc_add_flag (type, 4, "AF");
+  tdesc_add_flag (type, 6, "ZF");
+  tdesc_add_flag (type, 7, "SF");
+  tdesc_add_flag (type, 8, "TF");
+  tdesc_add_flag (type, 9, "IF");
+  tdesc_add_flag (type, 10, "DF");
+  tdesc_add_flag (type, 11, "OF");
+  tdesc_add_flag (type, 14, "NT");
+  tdesc_add_flag (type, 16, "RF");
+  tdesc_add_flag (type, 17, "VM");
+  tdesc_add_flag (type, 18, "AC");
+  tdesc_add_flag (type, 19, "VIF");
+  tdesc_add_flag (type, 20, "VIP");
+  tdesc_add_flag (type, 21, "ID");
+
+  tdesc_create_reg (feature, "eax", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "ecx", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "edx", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "ebx", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "esp", regnum++, 1, NULL, 32, "data_ptr");
+  tdesc_create_reg (feature, "ebp", regnum++, 1, NULL, 32, "data_ptr");
+  tdesc_create_reg (feature, "esi", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "edi", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "eip", regnum++, 1, NULL, 32, "code_ptr");
+  tdesc_create_reg (feature, "eflags", regnum++, 1, NULL, 32, "i386_eflags");
+  tdesc_create_reg (feature, "cs", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "ss", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "ds", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "es", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "fs", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "gs", regnum++, 1, NULL, 32, "int32");
+  tdesc_create_reg (feature, "st0", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "st1", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "st2", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "st3", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "st4", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "st5", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "st6", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "st7", regnum++, 1, NULL, 80, "i387_ext");
+  tdesc_create_reg (feature, "fctrl", regnum++, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "fstat", regnum++, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "ftag", regnum++, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "fiseg", regnum++, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "fioff", regnum++, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "foseg", regnum++, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "fooff", regnum++, 1, "float", 32, "int");
+  tdesc_create_reg (feature, "fop", regnum++, 1, "float", 32, "int");
+  return regnum;
+}
diff --git a/gdb/features/i386/32bit-linux.c b/gdb/features/i386/32bit-linux.c
new file mode 100644
index 0000000..686a2f1
--- /dev/null
+++ b/gdb/features/i386/32bit-linux.c
@@ -0,0 +1,14 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: 32bit-linux.xml */
+
+#include "target-descriptions.h"
+
+static int
+create_feature_i386_32bit_linux (struct target_desc *result, long regnum)
+{
+  struct tdesc_feature *feature;
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.i386.linux");
+  tdesc_create_reg (feature, "orig_eax", regnum++, 1, NULL, 32, "int");
+  return regnum;
+}
diff --git a/gdb/features/i386/32bit-mpx.c b/gdb/features/i386/32bit-mpx.c
new file mode 100644
index 0000000..6ed3b2e
--- /dev/null
+++ b/gdb/features/i386/32bit-mpx.c
@@ -0,0 +1,51 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: 32bit-mpx.xml */
+
+#include "target-descriptions.h"
+
+static int
+create_feature_i386_32bit_mpx (struct target_desc *result, long regnum)
+{
+  struct tdesc_feature *feature;
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.i386.mpx");
+  struct tdesc_type *field_type;
+  struct tdesc_type *type;
+  type = tdesc_create_struct (feature, "br128");
+  field_type = tdesc_named_type (feature, "uint64");
+  tdesc_add_field (type, "lbound", field_type);
+  field_type = tdesc_named_type (feature, "uint64");
+  tdesc_add_field (type, "ubound_raw", field_type);
+
+  type = tdesc_create_struct (feature, "_bndstatus");
+  tdesc_set_struct_size (type, 8);
+  tdesc_add_bitfield (type, "bde", 2, 31);
+  tdesc_add_bitfield (type, "error", 0, 1);
+
+  type = tdesc_create_union (feature, "status");
+  field_type = tdesc_named_type (feature, "data_ptr");
+  tdesc_add_field (type, "raw", field_type);
+  field_type = tdesc_named_type (feature, "_bndstatus");
+  tdesc_add_field (type, "status", field_type);
+
+  type = tdesc_create_struct (feature, "_bndcfgu");
+  tdesc_set_struct_size (type, 8);
+  tdesc_add_bitfield (type, "base", 12, 31);
+  tdesc_add_bitfield (type, "reserved", 2, 11);
+  tdesc_add_bitfield (type, "preserved", 1, 1);
+  tdesc_add_bitfield (type, "enabled", 0, 0);
+
+  type = tdesc_create_union (feature, "cfgu");
+  field_type = tdesc_named_type (feature, "data_ptr");
+  tdesc_add_field (type, "raw", field_type);
+  field_type = tdesc_named_type (feature, "_bndcfgu");
+  tdesc_add_field (type, "config", field_type);
+
+  tdesc_create_reg (feature, "bnd0raw", regnum++, 1, NULL, 128, "br128");
+  tdesc_create_reg (feature, "bnd1raw", regnum++, 1, NULL, 128, "br128");
+  tdesc_create_reg (feature, "bnd2raw", regnum++, 1, NULL, 128, "br128");
+  tdesc_create_reg (feature, "bnd3raw", regnum++, 1, NULL, 128, "br128");
+  tdesc_create_reg (feature, "bndcfgu", regnum++, 1, NULL, 64, "cfgu");
+  tdesc_create_reg (feature, "bndstatus", regnum++, 1, NULL, 64, "status");
+  return regnum;
+}
diff --git a/gdb/features/i386/32bit-pkeys.c b/gdb/features/i386/32bit-pkeys.c
new file mode 100644
index 0000000..24a40aa3
--- /dev/null
+++ b/gdb/features/i386/32bit-pkeys.c
@@ -0,0 +1,14 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: 32bit-pkeys.xml */
+
+#include "target-descriptions.h"
+
+static int
+create_feature_i386_32bit_pkeys (struct target_desc *result, long regnum)
+{
+  struct tdesc_feature *feature;
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.i386.pkeys");
+  tdesc_create_reg (feature, "pkru", regnum++, 1, NULL, 32, "uint32");
+  return regnum;
+}
diff --git a/gdb/features/i386/32bit-sse.c b/gdb/features/i386/32bit-sse.c
new file mode 100644
index 0000000..032623e
--- /dev/null
+++ b/gdb/features/i386/32bit-sse.c
@@ -0,0 +1,74 @@
+/* THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi:set ro:
+  Original: 32bit-sse.xml */
+
+#include "target-descriptions.h"
+
+static int
+create_feature_i386_32bit_sse (struct target_desc *result, long regnum)
+{
+  struct tdesc_feature *feature;
+
+  feature = tdesc_create_feature (result, "org.gnu.gdb.i386.sse");
+  struct tdesc_type *field_type;
+  field_type = tdesc_named_type (feature, "ieee_single");
+  tdesc_create_vector (feature, "v4f", field_type, 4);
+
+  field_type = tdesc_named_type (feature, "ieee_double");
+  tdesc_create_vector (feature, "v2d", field_type, 2);
+
+  field_type = tdesc_named_type (feature, "int8");
+  tdesc_create_vector (feature, "v16i8", field_type, 16);
+
+  field_type = tdesc_named_type (feature, "int16");
+  tdesc_create_vector (feature, "v8i16", field_type, 8);
+
+  field_type = tdesc_named_type (feature, "int32");
+  tdesc_create_vector (feature, "v4i32", field_type, 4);
+
+  field_type = tdesc_named_type (feature, "int64");
+  tdesc_create_vector (feature, "v2i64", field_type, 2);
+
+  struct tdesc_type *type;
+  type = tdesc_create_union (feature, "vec128");
+  field_type = tdesc_named_type (feature, "v4f");
+  tdesc_add_field (type, "v4_float", field_type);
+  field_type = tdesc_named_type (feature, "v2d");
+  tdesc_add_field (type, "v2_double", field_type);
+  field_type = tdesc_named_type (feature, "v16i8");
+  tdesc_add_field (type, "v16_int8", field_type);
+  field_type = tdesc_named_type (feature, "v8i16");
+  tdesc_add_field (type, "v8_int16", field_type);
+  field_type = tdesc_named_type (feature, "v4i32");
+  tdesc_add_field (type, "v4_int32", field_type);
+  field_type = tdesc_named_type (feature, "v2i64");
+  tdesc_add_field (type, "v2_int64", field_type);
+  field_type = tdesc_named_type (feature, "uint128");
+  tdesc_add_field (type, "uint128", field_type);
+
+  type = tdesc_create_flags (feature, "i386_mxcsr", 4);
+  tdesc_add_flag (type, 0, "IE");
+  tdesc_add_flag (type, 1, "DE");
+  tdesc_add_flag (type, 2, "ZE");
+  tdesc_add_flag (type, 3, "OE");
+  tdesc_add_flag (type, 4, "UE");
+  tdesc_add_flag (type, 5, "PE");
+  tdesc_add_flag (type, 6, "DAZ");
+  tdesc_add_flag (type, 7, "IM");
+  tdesc_add_flag (type, 8, "DM");
+  tdesc_add_flag (type, 9, "ZM");
+  tdesc_add_flag (type, 10, "OM");
+  tdesc_add_flag (type, 11, "UM");
+  tdesc_add_flag (type, 12, "PM");
+  tdesc_add_flag (type, 15, "FZ");
+
+  tdesc_create_reg (feature, "xmm0", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "xmm1", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "xmm2", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "xmm3", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "xmm4", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "xmm5", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "xmm6", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "xmm7", regnum++, 1, NULL, 128, "vec128");
+  tdesc_create_reg (feature, "mxcsr", regnum++, 1, "vector", 32, "i386_mxcsr");
+  return regnum;
+}