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Thu, 19 Dec 2024 09:47:06 -0800 (PST) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, bmeng@tinylab.org, liwei1518@gmail.com, zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com, Daniel Henrique Barboza Subject: [PATCH 1/2] target/riscv: use RISCVException enum in exception helpers Date: Thu, 19 Dec 2024 14:46:56 -0300 Message-ID: <20241219174657.1988767-2-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241219174657.1988767-1-dbarboza@ventanamicro.com> References: <20241219174657.1988767-1-dbarboza@ventanamicro.com> MIME-Version: 1.0 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=2607:f8b0:4864:20::631; envelope-from=dbarboza@ventanamicro.com; helo=mail-pl1-x631.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 autolearn=ham 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 @ventanamicro.com) X-ZM-MESSAGEID: 1734630473312116600 Content-Type: text/plain; charset="utf-8" Do a cosmetic change in riscv_raise_exception() to change 'exception' type from uint32_t to RISCVException, making it a bit clear that the arg is directly correlated to the RISCVException enum. As a side effect, change 'excp' type from int to RISCVException in generate_exception() to guarantee that all callers of riscv_raise_exception() will use the enum. Signed-off-by: Daniel Henrique Barboza Reviewed-by: Richard Henderson --- target/riscv/cpu.h | 3 ++- target/riscv/op_helper.c | 3 ++- target/riscv/translate.c | 2 +- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 284b112821..2b85e558f7 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -603,7 +603,8 @@ void riscv_cpu_set_mode(CPURISCVState *env, target_ulon= g newpriv, bool virt_en); =20 void riscv_translate_init(void); G_NORETURN void riscv_raise_exception(CPURISCVState *env, - uint32_t exception, uintptr_t pc); + RISCVException exception, + uintptr_t pc); =20 target_ulong riscv_cpu_get_fflags(CPURISCVState *env); void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong); diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index eddedacf4b..29c104bc23 100644 --- a/target/riscv/op_helper.c +++ b/target/riscv/op_helper.c @@ -27,7 +27,8 @@ =20 /* Exceptions processing helpers */ G_NORETURN void riscv_raise_exception(CPURISCVState *env, - uint32_t exception, uintptr_t pc) + RISCVException exception, + uintptr_t pc) { CPUState *cs =3D env_cpu(env); cs->exception_index =3D exception; diff --git a/target/riscv/translate.c b/target/riscv/translate.c index bccaf8e89a..ebae1807a4 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -244,7 +244,7 @@ static void gen_update_pc(DisasContext *ctx, target_lon= g diff) ctx->pc_save =3D ctx->base.pc_next + diff; } =20 -static void generate_exception(DisasContext *ctx, int excp) +static void generate_exception(DisasContext *ctx, RISCVException excp) { gen_update_pc(ctx, 0); gen_helper_raise_exception(tcg_env, tcg_constant_i32(excp)); --=20 2.47.1 From nobody Mon Dec 23 23:01:40 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1734630479; cv=none; d=zohomail.com; s=zohoarc; b=e8P9nCSsxFpo7AE9DQgStwcRSwbsTYOLniQldYdjIGYlOs98gt2r2pKzj9RBZPfgRjGx8IaWiliKEeEjkECCqWKNiWyEF8rWFYPLlYa5UKSwrRv2y9Yg3f5MHUVB29AAAXYV9kB+debWSzfeqMPH+rfmcjOcN4mmZlvZRDxyie4= ARC-Message-Signature: i=1; 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Thu, 19 Dec 2024 09:47:09 -0800 (PST) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, bmeng@tinylab.org, liwei1518@gmail.com, zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com, Daniel Henrique Barboza Subject: [PATCH 2/2] target/riscv: add trace in riscv_raise_exception() Date: Thu, 19 Dec 2024 14:46:57 -0300 Message-ID: <20241219174657.1988767-3-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241219174657.1988767-1-dbarboza@ventanamicro.com> References: <20241219174657.1988767-1-dbarboza@ventanamicro.com> MIME-Version: 1.0 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=2607:f8b0:4864:20::52d; envelope-from=dbarboza@ventanamicro.com; helo=mail-pg1-x52d.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 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 @ventanamicro.com) X-ZM-MESSAGEID: 1734630481155116600 Content-Type: text/plain; charset="utf-8" When using system mode we can get the CPU traps being taken via the 'riscv_trap' trace or the "-d int" qemu log. User mode does not a way of logging/showing exceptions to users. Add a trace in riscv_raise_exception() to allow qemu-riscv(32/64) users to check all exceptions being thrown. This is particularly useful to help identifying insns that are throwing SIGILLs. As it is today we need to debug their binaries to identify where the illegal insns are: $ ~/work/qemu/build/qemu-riscv64 -cpu rv64 ./foo.out Illegal instruction (core dumped) After this change users can capture the trace and use EPC to pinpoint the insn: $ ~/work/qemu/build/qemu-riscv64 -cpu rv64 -trace riscv_exception ./foo.out riscv_exception 8 (user_ecall) on epc 0x17cd2 riscv_exception 8 (user_ecall) on epc 0x17cda riscv_exception 8 (user_ecall) on epc 0x17622 (...) riscv_exception 2 (illegal_instruction) on epc 0x1053a Illegal instruction (core dumped) Signed-off-by: Daniel Henrique Barboza --- target/riscv/op_helper.c | 6 ++++++ target/riscv/trace-events | 3 +++ 2 files changed, 9 insertions(+) diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index 29c104bc23..29de8eb43d 100644 --- a/target/riscv/op_helper.c +++ b/target/riscv/op_helper.c @@ -24,6 +24,7 @@ #include "exec/exec-all.h" #include "exec/cpu_ldst.h" #include "exec/helper-proto.h" +#include "trace.h" =20 /* Exceptions processing helpers */ G_NORETURN void riscv_raise_exception(CPURISCVState *env, @@ -31,6 +32,11 @@ G_NORETURN void riscv_raise_exception(CPURISCVState *env, uintptr_t pc) { CPUState *cs =3D env_cpu(env); + + trace_riscv_exception(exception, + riscv_cpu_get_trap_name(exception, false), + env->pc); + cs->exception_index =3D exception; cpu_loop_exit_restore(cs, pc); } diff --git a/target/riscv/trace-events b/target/riscv/trace-events index 49ec4d3b7d..93837f82a1 100644 --- a/target/riscv/trace-events +++ b/target/riscv/trace-events @@ -9,3 +9,6 @@ pmpaddr_csr_write(uint64_t mhartid, uint32_t addr_index, ui= nt64_t val) "hart %" =20 mseccfg_csr_read(uint64_t mhartid, uint64_t val) "hart %" PRIu64 ": read m= seccfg, val: 0x%" PRIx64 mseccfg_csr_write(uint64_t mhartid, uint64_t val) "hart %" PRIu64 ": write= mseccfg, val: 0x%" PRIx64 + +# op_helper.c +riscv_exception(uint32_t exception, const char *desc, uint64_t epc) "%u (%= s) on epc 0x%"PRIx64"" --=20 2.47.1