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[PATCH v6 01/18] gdbstub: Add num_regs member to GDBFeature
From: |
Akihiko Odaki |
Subject: |
[PATCH v6 01/18] gdbstub: Add num_regs member to GDBFeature |
Date: |
Sun, 3 Sep 2023 14:03:09 +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 ecbc60a934..7dc097fcf6 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 v6 00/18] plugins: Allow to read registers, Akihiko Odaki, 2023/09/03
- [PATCH v6 01/18] gdbstub: Add num_regs member to GDBFeature,
Akihiko Odaki <=
- [PATCH v6 02/18] gdbstub: Introduce gdb_find_static_feature(), Akihiko Odaki, 2023/09/03
- [PATCH v6 04/18] gdbstub: Introduce GDBFeatureBuilder, Akihiko Odaki, 2023/09/03
- [PATCH v6 07/18] target/riscv: Use GDBFeature for dynamic XML, Akihiko Odaki, 2023/09/03
- [PATCH v6 08/18] gdbstub: Use GDBFeature for gdb_register_coprocessor, Akihiko Odaki, 2023/09/03
- [PATCH v6 10/18] gdbstub: Simplify XML lookup, Akihiko Odaki, 2023/09/03
- [PATCH v6 11/18] hw/core/cpu: Remove gdb_get_dynamic_xml member, Akihiko Odaki, 2023/09/03
- [PATCH v6 09/18] gdbstub: Use GDBFeature for GDBRegisterState, Akihiko Odaki, 2023/09/03
- [PATCH v6 12/18] gdbstub: Add members to identify registers to GDBFeature, Akihiko Odaki, 2023/09/03
- [PATCH v6 13/18] gdbstub: Expose functions to read registers, Akihiko Odaki, 2023/09/03
- [PATCH v6 18/18] contrib/plugins: Add cc plugin, Akihiko Odaki, 2023/09/03