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Wed, 13 May 2020 11:08:50 -0700 From: Joe Komlodi To: qemu-devel@nongnu.org Subject: [PATCH V2 2/4] target/microblaze: gdb: Extend the number of registers presented to GDB Date: Wed, 13 May 2020 11:08:46 -0700 Message-Id: <1589393329-223076-2-git-send-email-komlodi@xilinx.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1589393329-223076-1-git-send-email-komlodi@xilinx.com> References: <1589393329-223076-1-git-send-email-komlodi@xilinx.com> X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.2.0.1013-23620.005 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:149.199.60.83; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:xsj-pvapsmtpgw01; PTR:unknown-60-83.xilinx.com; CAT:NONE; SFTY:; SFS:(39860400002)(376002)(136003)(346002)(396003)(46966005)(33430700001)(70206006)(2616005)(44832011)(82740400003)(33440700001)(426003)(316002)(2906002)(107886003)(47076004)(8936002)(9786002)(5660300002)(8676002)(336012)(86362001)(82310400002)(36756003)(7696005)(356005)(70586007)(186003)(81166007)(26005)(6666004)(6916009)(478600001)(4326008); 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Ip=[149.199.60.83]; Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR02MB4622 Received-SPF: pass client-ip=40.107.237.81; envelope-from=komlodi@xilinx.com; helo=NAM12-BN8-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/13 14:08:57 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: edgar.iglesias@xilinx.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Increase the number of Microblaze registers QEMU will report when talking to GDB. Signed-off-by: Joe Komlodi --- target/microblaze/cpu.c | 2 +- target/microblaze/gdbstub.c | 52 ++++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 50 insertions(+), 4 deletions(-) diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c index 41cac1b..5b6ad5b 100644 --- a/target/microblaze/cpu.c +++ b/target/microblaze/cpu.c @@ -331,7 +331,7 @@ static void mb_cpu_class_init(ObjectClass *oc, void *data) #endif dc->vmsd = &vmstate_mb_cpu; device_class_set_props(dc, mb_properties); - cc->gdb_num_core_regs = 32 + 5; + cc->gdb_num_core_regs = 32 + 27; cc->gdb_get_dynamic_xml = mb_gdb_get_dynamic_xml; cc->gdb_core_xml_file = "microblaze-core.xml"; diff --git a/target/microblaze/gdbstub.c b/target/microblaze/gdbstub.c index cdca434..af29f00 100644 --- a/target/microblaze/gdbstub.c +++ b/target/microblaze/gdbstub.c @@ -26,12 +26,37 @@ int mb_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n) MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); CPUMBState *env = &cpu->env; + /* + * GDB expects registers to be reported in this order: + * R0-R31 + * PC-BTR + * PVR0-PVR11 + * EDR-TLBHI + * SLR-SHR + */ if (n < 32) { return gdb_get_reg32(mem_buf, env->regs[n]); } else { - return gdb_get_reg32(mem_buf, env->sregs[n - 32]); + n -= 32; + switch (n) { + case 0 ... 5: + return gdb_get_reg32(mem_buf, env->sregs[n]); + /* PVR12 is intentionally skipped */ + case 6 ... 17: + n -= 6; + return gdb_get_reg32(mem_buf, env->pvr.regs[n]); + case 18 ... 24: + /* Add an offset of 6 to resume where we left off with SRegs */ + n = n - 18 + 6; + return gdb_get_reg32(mem_buf, env->sregs[n]); + case 25: + return gdb_get_reg32(mem_buf, env->slr); + case 26: + return gdb_get_reg32(mem_buf, env->shr); + default: + return 0; + } } - return 0; } int mb_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) @@ -50,7 +75,28 @@ int mb_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) if (n < 32) { env->regs[n] = tmp; } else { - env->sregs[n - 32] = tmp; + n -= 32; + switch (n) { + case 0 ... 5: + env->sregs[n] = tmp; + break; + /* PVR12 is intentionally skipped */ + case 6 ... 17: + n -= 6; + env->pvr.regs[n] = tmp; + break; + case 18 ... 24: + /* Add an offset of 6 to resume where we left off with SRegs */ + n = n - 18 + 6; + env->sregs[n] = tmp; + break; + case 25: + env->slr = tmp; + break; + case 26: + env->shr = tmp; + break; + } } return 4; } From patchwork Wed May 13 18:08:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joe Komlodi X-Patchwork-Id: 282828 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35C7AC433E0 for ; Wed, 13 May 2020 18:10:14 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B92CC2065C for ; 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Wed, 13 May 2020 11:08:50 -0700 From: Joe Komlodi To: qemu-devel@nongnu.org Subject: [PATCH V2 3/4] target/microblaze: gdb: Fix incorrect SReg reporting Date: Wed, 13 May 2020 11:08:47 -0700 Message-Id: <1589393329-223076-3-git-send-email-komlodi@xilinx.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1589393329-223076-1-git-send-email-komlodi@xilinx.com> References: <1589393329-223076-1-git-send-email-komlodi@xilinx.com> X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.2.0.1013-23620.005 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:149.199.60.83; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:xsj-pvapsmtpgw01; PTR:unknown-60-83.xilinx.com; CAT:NONE; SFTY:; SFS:(396003)(376002)(346002)(136003)(39860400002)(46966005)(33430700001)(36756003)(426003)(2616005)(7696005)(107886003)(336012)(70206006)(44832011)(70586007)(2906002)(86362001)(186003)(26005)(8676002)(4326008)(47076004)(8936002)(356005)(5660300002)(82740400003)(9786002)(33440700001)(6916009)(81166007)(6666004)(82310400002)(316002)(478600001); 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Ip=[149.199.60.83]; Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR02MB7103 Received-SPF: pass client-ip=40.107.92.45; envelope-from=komlodi@xilinx.com; helo=NAM10-BN7-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/13 14:08:56 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: edgar.iglesias@xilinx.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" SRegs used to be reported to GDB by iterating over the SRegs array, however we do not store them in an order that allows them to be reported to GDB in that way. To fix this, a simple map is used to map the register GDB wants to its location in the SRegs array. Signed-off-by: Joe Komlodi --- target/microblaze/gdbstub.c | 59 +++++++++++++++++++++++++++++++++++++-------- 1 file changed, 49 insertions(+), 10 deletions(-) diff --git a/target/microblaze/gdbstub.c b/target/microblaze/gdbstub.c index af29f00..485b717 100644 --- a/target/microblaze/gdbstub.c +++ b/target/microblaze/gdbstub.c @@ -25,6 +25,21 @@ int mb_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n) { MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs); CPUMBState *env = &cpu->env; + /* + * GDB expects SREGs in the following order: + * PC, MSR, EAR, ESR, FSR, BTR, EDR, PID, ZPR, TLBX, TLBSX, TLBLO, TLBHI. + * They aren't stored in this order, so make a map. + * PID, ZPR, TLBx, TLBsx, TLBLO, and TLBHI aren't modeled, so we don't + * map them to anything and return a value of 0 instead. + */ + static const uint8_t sreg_map[6] = { + SR_PC, + SR_MSR, + SR_EAR, + SR_ESR, + SR_FSR, + SR_BTR + }; /* * GDB expects registers to be reported in this order: @@ -40,15 +55,16 @@ int mb_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n) n -= 32; switch (n) { case 0 ... 5: - return gdb_get_reg32(mem_buf, env->sregs[n]); + return gdb_get_reg32(mem_buf, env->sregs[sreg_map[n]]); /* PVR12 is intentionally skipped */ case 6 ... 17: n -= 6; return gdb_get_reg32(mem_buf, env->pvr.regs[n]); - case 18 ... 24: - /* Add an offset of 6 to resume where we left off with SRegs */ - n = n - 18 + 6; - return gdb_get_reg32(mem_buf, env->sregs[n]); + case 18: + return gdb_get_reg32(mem_buf, env->sregs[SR_EDR]); + /* Other SRegs aren't modeled, so report a value of 0 */ + case 19 ... 24: + return gdb_get_reg32(mem_buf, 0); case 25: return gdb_get_reg32(mem_buf, env->slr); case 26: @@ -66,29 +82,52 @@ int mb_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) CPUMBState *env = &cpu->env; uint32_t tmp; + /* + * GDB expects SREGs in the following order: + * PC, MSR, EAR, ESR, FSR, BTR, EDR, PID, ZPR, TLBX, TLBSX, TLBLO, TLBHI. + * They aren't stored in this order, so make a map. + * PID, ZPR, TLBx, TLBsx, TLBLO, and TLBHI aren't modeled, so we don't + * map them to anything. + */ + static const uint8_t sreg_map[6] = { + SR_PC, + SR_MSR, + SR_EAR, + SR_ESR, + SR_FSR, + SR_BTR + }; + if (n > cc->gdb_num_core_regs) { return 0; } tmp = ldl_p(mem_buf); + /* + * GDB expects registers to be reported in this order: + * R0-R31 + * PC-BTR + * PVR0-PVR11 + * EDR-TLBHI + * SLR-SHR + */ if (n < 32) { env->regs[n] = tmp; } else { n -= 32; switch (n) { case 0 ... 5: - env->sregs[n] = tmp; + env->sregs[sreg_map[n]] = tmp; break; /* PVR12 is intentionally skipped */ case 6 ... 17: n -= 6; env->pvr.regs[n] = tmp; break; - case 18 ... 24: - /* Add an offset of 6 to resume where we left off with SRegs */ - n = n - 18 + 6; - env->sregs[n] = tmp; + /* Only EDR is modeled in these indeces, so ignore the rest */ + case 18: + env->sregs[SR_EDR] = tmp; break; case 25: env->slr = tmp;