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Iglesias" , Eduardo Habkost , Pierrick Bouvier , qemu-riscv@nongnu.org, Alistair Francis , Akihiko Odaki Subject: [PATCH v2 32/43] gdbstub: Simplify XML lookup Date: Wed, 3 Jan 2024 17:33:38 +0000 Message-Id: <20240103173349.398526-33-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240103173349.398526-1-alex.bennee@linaro.org> References: <20240103173349.398526-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::333; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x333.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1704303382022100003 From: Akihiko Odaki Now we know all instances of GDBFeature that is used in CPU so we can traverse them to find XML. This removes the need for a CPU-specific lookup function for dynamic XMLs. Signed-off-by: Akihiko Odaki Reviewed-by: Alex Benn=C3=A9e Message-Id: <20231213-gdb-v17-7-777047380591@daynix.com> Signed-off-by: Alex Benn=C3=A9e --- include/exec/gdbstub.h | 6 +++ gdbstub/gdbstub.c | 118 +++++++++++++++++++++-------------------- hw/core/cpu-common.c | 5 +- 3 files changed, 69 insertions(+), 60 deletions(-) diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h index bcaab1bc750..82a8afa237f 100644 --- a/include/exec/gdbstub.h +++ b/include/exec/gdbstub.h @@ -27,6 +27,12 @@ typedef struct GDBFeatureBuilder { typedef int (*gdb_get_reg_cb)(CPUState *cpu, GByteArray *buf, int reg); typedef int (*gdb_set_reg_cb)(CPUState *cpu, uint8_t *buf, int reg); =20 +/** + * gdb_init_cpu(): Initialize the CPU for gdbstub. + * @cpu: The CPU to be initialized. + */ +void gdb_init_cpu(CPUState *cpu); + /** * gdb_register_coprocessor() - register a supplemental set of registers * @cpu - the CPU associated with registers diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index 21fea7fffae..1d5c1da1b24 100644 --- a/gdbstub/gdbstub.c +++ b/gdbstub/gdbstub.c @@ -352,6 +352,7 @@ static const char *get_feature_xml(const char *p, const= char **newp, { CPUState *cpu =3D gdb_get_first_cpu_in_process(process); CPUClass *cc =3D CPU_GET_CLASS(cpu); + GDBRegisterState *r; size_t len; =20 /* @@ -365,7 +366,6 @@ static const char *get_feature_xml(const char *p, const= char **newp, /* Is it the main target xml? */ if (strncmp(p, "target.xml", len) =3D=3D 0) { if (!process->target_xml) { - GDBRegisterState *r; g_autoptr(GPtrArray) xml =3D g_ptr_array_new_with_free_func(g_= free); =20 g_ptr_array_add( @@ -380,18 +380,12 @@ static const char *get_feature_xml(const char *p, con= st char **newp, g_markup_printf_escaped("%s", cc->gdb_arch_name(cpu))); } - g_ptr_array_add( - xml, - g_markup_printf_escaped("", - cc->gdb_core_xml_file)); - if (cpu->gdb_regs) { - for (guint i =3D 0; i < cpu->gdb_regs->len; i++) { - r =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, = i); - g_ptr_array_add( - xml, - g_markup_printf_escaped("", - r->feature->xmlname)); - } + for (guint i =3D 0; i < cpu->gdb_regs->len; i++) { + r =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); + g_ptr_array_add( + xml, + g_markup_printf_escaped("", + r->feature->xmlname)); } g_ptr_array_add(xml, g_strdup("")); g_ptr_array_add(xml, NULL); @@ -400,20 +394,11 @@ static const char *get_feature_xml(const char *p, con= st char **newp, } return process->target_xml; } - /* Is it dynamically generated by the target? */ - if (cc->gdb_get_dynamic_xml) { - g_autofree char *xmlname =3D g_strndup(p, len); - const char *xml =3D cc->gdb_get_dynamic_xml(cpu, xmlname); - if (xml) { - return xml; - } - } - /* Is it one of the encoded gdb-xml/ files? */ - for (int i =3D 0; gdb_static_features[i].xmlname; i++) { - const char *name =3D gdb_static_features[i].xmlname; - if ((strncmp(name, p, len) =3D=3D 0) && - strlen(name) =3D=3D len) { - return gdb_static_features[i].xml; + /* Is it one of the features? */ + for (guint i =3D 0; i < cpu->gdb_regs->len; i++) { + r =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); + if (strncmp(p, r->feature->xmlname, len) =3D=3D 0) { + return r->feature->xml; } } =20 @@ -508,12 +493,10 @@ static int gdb_read_register(CPUState *cpu, GByteArra= y *buf, int reg) return cc->gdb_read_register(cpu, buf, reg); } =20 - if (cpu->gdb_regs) { - for (guint i =3D 0; i < cpu->gdb_regs->len; i++) { - r =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); - if (r->base_reg <=3D reg && reg < r->base_reg + r->feature->nu= m_regs) { - return r->get_reg(cpu, buf, reg - r->base_reg); - } + for (guint i =3D 0; i < cpu->gdb_regs->len; i++) { + r =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); + if (r->base_reg <=3D reg && reg < r->base_reg + r->feature->num_re= gs) { + return r->get_reg(cpu, buf, reg - r->base_reg); } } return 0; @@ -528,51 +511,70 @@ static int gdb_write_register(CPUState *cpu, uint8_t = *mem_buf, int reg) return cc->gdb_write_register(cpu, mem_buf, reg); } =20 - if (cpu->gdb_regs) { - for (guint i =3D 0; i < cpu->gdb_regs->len; i++) { - r =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); - if (r->base_reg <=3D reg && reg < r->base_reg + r->feature->nu= m_regs) { - return r->set_reg(cpu, mem_buf, reg - r->base_reg); - } + for (guint i =3D 0; i < cpu->gdb_regs->len; i++) { + r =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); + if (r->base_reg <=3D reg && reg < r->base_reg + r->feature->num_re= gs) { + return r->set_reg(cpu, mem_buf, reg - r->base_reg); } } return 0; } =20 +static void gdb_register_feature(CPUState *cpu, int base_reg, + gdb_get_reg_cb get_reg, gdb_set_reg_cb se= t_reg, + const GDBFeature *feature) +{ + GDBRegisterState s =3D { + .base_reg =3D base_reg, + .get_reg =3D get_reg, + .set_reg =3D set_reg, + .feature =3D feature + }; + + g_array_append_val(cpu->gdb_regs, s); +} + +void gdb_init_cpu(CPUState *cpu) +{ + CPUClass *cc =3D CPU_GET_CLASS(cpu); + const GDBFeature *feature; + + cpu->gdb_regs =3D g_array_new(false, false, sizeof(GDBRegisterState)); + + if (cc->gdb_core_xml_file) { + feature =3D gdb_find_static_feature(cc->gdb_core_xml_file); + gdb_register_feature(cpu, 0, + cc->gdb_read_register, cc->gdb_write_register, + feature); + } + + cpu->gdb_num_regs =3D cpu->gdb_num_g_regs =3D cc->gdb_num_core_regs; +} + void gdb_register_coprocessor(CPUState *cpu, gdb_get_reg_cb get_reg, gdb_set_reg_cb set_r= eg, const GDBFeature *feature, int g_pos) { GDBRegisterState *s; guint i; + int base_reg =3D cpu->gdb_num_regs; =20 - if (cpu->gdb_regs) { - for (i =3D 0; i < cpu->gdb_regs->len; i++) { - /* Check for duplicates. */ - s =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); - if (s->feature =3D=3D feature) { - return; - } + for (i =3D 0; i < cpu->gdb_regs->len; i++) { + /* Check for duplicates. */ + s =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); + if (s->feature =3D=3D feature) { + return; } - } else { - cpu->gdb_regs =3D g_array_new(false, false, sizeof(GDBRegisterStat= e)); - i =3D 0; } =20 - g_array_set_size(cpu->gdb_regs, i + 1); - s =3D &g_array_index(cpu->gdb_regs, GDBRegisterState, i); - s->base_reg =3D cpu->gdb_num_regs; - s->get_reg =3D get_reg; - s->set_reg =3D set_reg; - s->feature =3D feature; + gdb_register_feature(cpu, base_reg, get_reg, set_reg, feature); =20 /* Add to end of list. */ cpu->gdb_num_regs +=3D feature->num_regs; if (g_pos) { - if (g_pos !=3D s->base_reg) { + if (g_pos !=3D base_reg) { error_report("Error: Bad gdb register numbering for '%s', " - "expected %d got %d", feature->xml, - g_pos, s->base_reg); + "expected %d got %d", feature->xml, g_pos, base_r= eg); } else { cpu->gdb_num_g_regs =3D cpu->gdb_num_regs; } diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c index 82dae51a550..cd7903ba6e7 100644 --- a/hw/core/cpu-common.c +++ b/hw/core/cpu-common.c @@ -27,6 +27,7 @@ #include "qemu/main-loop.h" #include "exec/log.h" #include "exec/cpu-common.h" +#include "exec/gdbstub.h" #include "qemu/error-report.h" #include "qemu/qemu-print.h" #include "sysemu/tcg.h" @@ -238,11 +239,10 @@ static void cpu_common_unrealizefn(DeviceState *dev) static void cpu_common_initfn(Object *obj) { CPUState *cpu =3D CPU(obj); - CPUClass *cc =3D CPU_GET_CLASS(obj); =20 + gdb_init_cpu(cpu); cpu->cpu_index =3D UNASSIGNED_CPU_INDEX; cpu->cluster_index =3D UNASSIGNED_CLUSTER_INDEX; - cpu->gdb_num_regs =3D cpu->gdb_num_g_regs =3D cc->gdb_num_core_regs; /* user-mode doesn't have configurable SMP topology */ /* the default value is changed by qemu_init_vcpu() for system-mode */ cpu->nr_cores =3D 1; @@ -262,6 +262,7 @@ static void cpu_common_finalize(Object *obj) { CPUState *cpu =3D CPU(obj); =20 + g_array_free(cpu->gdb_regs, TRUE); qemu_lockcnt_destroy(&cpu->in_ioctl_lock); qemu_mutex_destroy(&cpu->work_mutex); } --=20 2.39.2