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[PATCH v8 01/19] gdbstub: Add num_regs member to GDBFeature
From: |
Akihiko Odaki |
Subject: |
[PATCH v8 01/19] gdbstub: Add num_regs member to GDBFeature |
Date: |
Sat, 16 Sep 2023 17:01:18 +0900 |
Currently the number of registers exposed to GDB is written as magic
numbers in code. Derive the number of registers GDB actually see from
XML files to replace the magic numbers in code later.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
---
include/exec/gdbstub.h | 1 +
scripts/feature_to_c.py | 46 +++++++++++++++++++++++++++++++++++++++--
2 files changed, 45 insertions(+), 2 deletions(-)
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index 1a01c35f8e..a43aa34dad 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -13,6 +13,7 @@
typedef struct GDBFeature {
const char *xmlname;
const char *xml;
+ int num_regs;
} GDBFeature;
diff --git a/scripts/feature_to_c.py b/scripts/feature_to_c.py
index bcbcb83beb..e04d6b2df7 100755
--- a/scripts/feature_to_c.py
+++ b/scripts/feature_to_c.py
@@ -1,7 +1,7 @@
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
-import os, sys
+import os, sys, xml.etree.ElementTree
def writeliteral(indent, bytes):
sys.stdout.write(' ' * indent)
@@ -39,10 +39,52 @@ def writeliteral(indent, bytes):
with open(input, 'rb') as file:
read = file.read()
+ parser = xml.etree.ElementTree.XMLPullParser(['start', 'end'])
+ parser.feed(read)
+ events = parser.read_events()
+ event, element = next(events)
+ if event != 'start':
+ sys.stderr.write(f'unexpected event: {event}\n')
+ exit(1)
+ if element.tag != 'feature':
+ sys.stderr.write(f'unexpected start tag: {element.tag}\n')
+ exit(1)
+
+ regnum = 0
+ regnums = []
+ tags = ['feature']
+ for event, element in events:
+ if event == 'end':
+ if element.tag != tags[len(tags) - 1]:
+ sys.stderr.write(f'unexpected end tag: {element.tag}\n')
+ exit(1)
+
+ tags.pop()
+ if element.tag == 'feature':
+ break
+ elif event == 'start':
+ if len(tags) < 2 and element.tag == 'reg':
+ if 'regnum' in element.attrib:
+ regnum = int(element.attrib['regnum'])
+
+ regnums.append(regnum)
+ regnum += 1
+
+ tags.append(element.tag)
+ else:
+ raise Exception(f'unexpected event: {event}\n')
+
+ if len(tags):
+ sys.stderr.write('unterminated feature tag\n')
+ exit(1)
+
+ base_reg = min(regnums)
+ num_regs = max(regnums) - base_reg + 1 if len(regnums) else 0
+
sys.stdout.write(' {\n')
writeliteral(8, bytes(os.path.basename(input), 'utf-8'))
sys.stdout.write(',\n')
writeliteral(8, read)
- sys.stdout.write('\n },\n')
+ sys.stdout.write(f',\n {num_regs},\n }},\n')
sys.stdout.write(' { NULL }\n};\n')
--
2.42.0
- [PATCH v8 00/19] plugins: Allow to read registers, Akihiko Odaki, 2023/09/16
- [PATCH v8 01/19] gdbstub: Add num_regs member to GDBFeature,
Akihiko Odaki <=
- [PATCH v8 03/19] gdbstub: Introduce GDBFeatureBuilder, Akihiko Odaki, 2023/09/16
- [PATCH v8 02/19] gdbstub: Introduce gdb_find_static_feature(), Akihiko Odaki, 2023/09/16
- [PATCH v8 04/19] target/arm: Use GDBFeature for dynamic XML, Akihiko Odaki, 2023/09/16
- [PATCH v8 05/19] target/ppc: Use GDBFeature for dynamic XML, Akihiko Odaki, 2023/09/16
- [PATCH v8 06/19] target/riscv: Use GDBFeature for dynamic XML, Akihiko Odaki, 2023/09/16
- [PATCH v8 07/19] gdbstub: Use GDBFeature for gdb_register_coprocessor, Akihiko Odaki, 2023/09/16
- [PATCH v8 08/19] gdbstub: Use GDBFeature for GDBRegisterState, Akihiko Odaki, 2023/09/16
- [PATCH v8 10/19] gdbstub: Simplify XML lookup, Akihiko Odaki, 2023/09/16
- [PATCH v8 11/19] gdbstub: Infer number of core registers from XML, Akihiko Odaki, 2023/09/16
- [PATCH v8 09/19] gdbstub: Change gdb_get_reg_cb and gdb_set_reg_cb, Akihiko Odaki, 2023/09/16