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gdbstub: Check if gdb_regs is NULL

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cpu->gdb_regs may be NULL if no coprocessor is registered.

Fixes: 73c392c26b ("gdbstub: Replace gdb_regs with an array")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20231029145033.592566-17-alex.bennee@linaro.org>
Message-Id: <20231019101030.128431-2-akihiko.odaki@daynix.com>
Tested-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Akihiko Odaki 2023-10-29 14:50:30 +00:00 • committed by Alex Bennée
parent aba77ac5db
commit dbd6623ce7
1 changed files with 20 additions and 14 deletions
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6
gdbstub/gdbstub.c
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@ -385,6 +385,7 @@ static const char *get_feature_xml(const char *p, const char **newp,
xml, xml,
g_markup_printf_escaped("<xi:include href=\"%s\"/>", g_markup_printf_escaped("<xi:include href=\"%s\"/>",
cc->gdb_core_xml_file)); cc->gdb_core_xml_file));
if (cpu->gdb_regs) {
for (guint i = 0; i < cpu->gdb_regs->len; i++) { for (guint i = 0; i < cpu->gdb_regs->len; i++) {
r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i); r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
g_ptr_array_add( g_ptr_array_add(
@ -392,6 +393,7 @@ static const char *get_feature_xml(const char *p, const char **newp,
g_markup_printf_escaped("<xi:include href=\"%s\"/>", g_markup_printf_escaped("<xi:include href=\"%s\"/>",
r->xml)); r->xml));
} }
}
g_ptr_array_add(xml, g_strdup("</target>")); g_ptr_array_add(xml, g_strdup("</target>"));
g_ptr_array_add(xml, NULL); g_ptr_array_add(xml, NULL);
@ -430,12 +432,14 @@ static int gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
return cc->gdb_read_register(cpu, buf, reg); return cc->gdb_read_register(cpu, buf, reg);
} }
if (cpu->gdb_regs) {
for (guint i = 0; i < cpu->gdb_regs->len; i++) { for (guint i = 0; i < cpu->gdb_regs->len; i++) {
r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i); r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
return r->get_reg(env, buf, reg - r->base_reg); return r->get_reg(env, buf, reg - r->base_reg);
} }
} }
}
return 0; return 0;
} }
@ -449,12 +453,14 @@ static int gdb_write_register(CPUState *cpu, uint8_t *mem_buf, int reg)
return cc->gdb_write_register(cpu, mem_buf, reg); return cc->gdb_write_register(cpu, mem_buf, reg);
} }
if (cpu->gdb_regs) {
for (guint i = 0; i < cpu->gdb_regs->len; i++) { for (guint i = 0; i < cpu->gdb_regs->len; i++) {
r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i); r = &g_array_index(cpu->gdb_regs, GDBRegisterState, i);
if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) { if (r->base_reg <= reg && reg < r->base_reg + r->num_regs) {
return r->set_reg(env, mem_buf, reg - r->base_reg); return r->set_reg(env, mem_buf, reg - r->base_reg);
} }
} }
}
return 0; return 0;
} }