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gdbstub: Add members to identify registers to GDBFeature

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These members will be used to help plugins to identify registers.
The added members in instances of GDBFeature dynamically generated by
CPUs will be filled in later changes.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20231213-gdb-v17-10-777047380591@daynix.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240227144335.1196131-15-alex.bennee@linaro.org>
This commit is contained in:
Akihiko Odaki 2024-02-27 14:43:20 +00:00 committed by Alex Bennée
parent f1a5287fc3
commit eb37086fb0
4 changed files with 26 additions and 7 deletions
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12
gdbstub/gdbstub.c
View File

@ -419,9 +419,10 @@ void gdb_feature_builder_init(GDBFeatureBuilder *builder, GDBFeature *feature,
builder->feature = feature;
builder->xml = g_ptr_array_new();
g_ptr_array_add(builder->xml, header);
builder->regs = g_ptr_array_new();
builder->base_reg = base_reg;
feature->xmlname = xmlname;
feature->num_regs = 0;
feature->name = name;
}
void gdb_feature_builder_append_tag(const GDBFeatureBuilder *builder,
@ -440,10 +441,12 @@ void gdb_feature_builder_append_reg(const GDBFeatureBuilder *builder,
const char *type,
const char *group)
{
if (builder->feature->num_regs < regnum) {
builder->feature->num_regs = regnum;
if (builder->regs->len <= regnum) {
g_ptr_array_set_size(builder->regs, regnum + 1);
}
builder->regs->pdata[regnum] = (gpointer *)name;
if (group) {
gdb_feature_builder_append_tag(
builder,
@ -469,6 +472,9 @@ void gdb_feature_builder_end(const GDBFeatureBuilder *builder)
}
g_ptr_array_free(builder->xml, TRUE);
builder->feature->num_regs = builder->regs->len;
builder->feature->regs = (void *)g_ptr_array_free(builder->regs, FALSE);
}
const GDBFeature *gdb_find_static_feature(const char *xmlname)

3
include/exec/gdbstub.h
View File

@ -13,12 +13,15 @@
typedef struct GDBFeature {
const char *xmlname;
const char *xml;
const char *name;
const char * const *regs;
int num_regs;
} GDBFeature;
typedef struct GDBFeatureBuilder {
GDBFeature *feature;
GPtrArray *xml;
GPtrArray *regs;
int base_reg;
} GDBFeatureBuilder;

14
scripts/feature_to_c.py
View File

@ -50,7 +50,9 @@ for input in sys.argv[1:]:
sys.stderr.write(f'unexpected start tag: {element.tag}\n')
exit(1)
feature_name = element.attrib['name']
regnum = 0
regnames = []
regnums = []
tags = ['feature']
for event, element in events:
@ -67,6 +69,7 @@ for input in sys.argv[1:]:
if 'regnum' in element.attrib:
regnum = int(element.attrib['regnum'])
regnames.append(element.attrib['name'])
regnums.append(regnum)
regnum += 1
@ -85,6 +88,15 @@ for input in sys.argv[1:]:
writeliteral(8, bytes(os.path.basename(input), 'utf-8'))
sys.stdout.write(',\n')
writeliteral(8, read)
sys.stdout.write(f',\n {num_regs},\n }},\n')
sys.stdout.write(',\n')
writeliteral(8, bytes(feature_name, 'utf-8'))
sys.stdout.write(',\n (const char * const []) {\n')
for index, regname in enumerate(regnames):
sys.stdout.write(f' [{regnums[index] - base_reg}] =\n')
writeliteral(16, bytes(regname, 'utf-8'))
sys.stdout.write(',\n')
sys.stdout.write(f' }},\n {num_regs},\n }},\n')
sys.stdout.write(' { NULL }\n};\n')

4
target/riscv/gdbstub.c
View File

@ -266,11 +266,9 @@ static GDBFeature *riscv_gen_dynamic_csr_feature(CPUState *cs, int base_reg)
}
predicate = csr_ops[i].predicate;
if (predicate && (predicate(env, i) == RISCV_EXCP_NONE)) {
g_autofree char *dynamic_name = NULL;
name = csr_ops[i].name;
if (!name) {
dynamic_name = g_strdup_printf("csr%03x", i);
name = dynamic_name;
name = g_strdup_printf("csr%03x", i);
}
gdb_feature_builder_append_reg(&builder, name, bitsize, i,