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; Thu, 2 May 2019 15:59:20 +0200 (CEST) Received: from kaod.org (lns-bzn-46-82-253-208-248.adsl.proxad.net [82.253.208.248]) (Authenticated sender: groug@kaod.org) by player157.ha.ovh.net (Postfix) with ESMTPSA id BD2BC547C2FB; Thu, 2 May 2019 13:59:12 +0000 (UTC) Date: Thu, 2 May 2019 15:59:11 +0200 From: Greg Kurz To: Suraj Jitindar Singh Message-ID: <20190502155911.59f054a1@bahia.lan> In-Reply-To: <20190501053522.10967-2-sjitindarsingh@gmail.com> References: <20190501053522.10967-1-sjitindarsingh@gmail.com> <20190501053522.10967-2-sjitindarsingh@gmail.com> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Ovh-Tracer-Id: 17849735648896129432 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduuddrieelgdejfecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 178.33.253.26 Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH 2/2] ppc: Add dump-stack implementation X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: armbru@redhat.com, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, dgilbert@redhat.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Message-ID: <20190502135911.jXjjiUIQ-A30w3NCR5pcIGWTV5Bw5SHKhR_iS5zbPI0@z> On Wed, 1 May 2019 15:35:22 +1000 Suraj Jitindar Singh wrote: > The monitor function dump-stack is used to dump the stack for a cpu. > This can be useful for debugging purposes when the stack cannot be > dumped by another means. > > Add a ppc implementation ppc_cpu_dump_stack(). > The stack pointer is stored in R1 with the back pointer at offset 0 and > the link register at offset 2. > Also dump the registers from the stack frame if the marker "regshere" is > found. > This only dumps the kernel stack, stopping if a non-kernel address is > found in the stack. > > Sample output: > (qemu) dump-stack > sp: 0xc00000007bfc5690 lr: 0xc0000000000974b8 > sp: 0xc00000007bfc56f0 lr: 0xc00000000065aab4 > sp: 0xc00000007bfc5720 lr: 0xc00000000065ab04 > sp: 0xc00000007bfc5740 lr: 0xc0000000000c29b8 > sp: 0xc00000007bfc57b0 lr: 0xc0000000000bc9e8 > sp: 0xc00000007bfc57e0 lr: 0xc0000000000bd584 > sp: 0xc00000007bfc5800 lr: 0xc0000000000bee14 > sp: 0xc00000007bfc5ac0 lr: 0xc0000000000c2100 > sp: 0xc00000007bfc5c60 lr: 0xc000000000029460 > sp: 0xc00000007bfc5ca0 lr: 0xc00000000010b5e8 > sp: 0xc00000007bfc5d00 lr: 0xc000000000105f34 > trap : 0x0000000000000700 > pc : 0xc000000000104490 > msr : 0x9000000002843003 > lr : 0xc000000000103ffc > gpr 0: 0x0000000000000001 > gpr 1: 0xc00000005051f530 > gpr 2: 0xc000000001088200 > gpr 3: 0x0000000000000001 > gpr 4: 0xc000000032d60000 > gpr 5: 0xc0000000014b8f00 > gpr 6: 0x0000000000c835e0 > gpr 7: 0x0000000000000000 > gpr 8: 0x0000000000000000 > gpr 9: 0xc000000032f00000 > gpr10: 0x9000000002803033 > gpr11: 0xc000000000b60f00 > gpr12: 0x0000000000002000 > gpr13: 0xc000000001250000 > gpr14: 0x0000000000000000 > gpr15: 0x0000000000000008 > gpr16: 0x0000000000000000 > gpr17: 0xc00000000114f790 > gpr18: 0x00000000ffffffff > gpr19: 0xc00000005051f8e8 > gpr20: 0x0000000000000001 > gpr21: 0x0000000000000000 > gpr22: 0x0000000000000001 > gpr23: 0x0000000000000001 > gpr24: 0x0000000000000001 > gpr25: 0xc0000000014b8f70 > gpr26: 0x0000000000000000 > gpr27: 0x0000000000000001 > gpr28: 0x0000000000000001 > gpr29: 0x0000000000000000 > gpr30: 0xc0000000014b8f00 > gpr31: 0xc0000000014b8f00 > sp: 0xc00000005051f530 lr: 0x0000000000000000 > sp: 0xc00000005051f600 lr: 0xc000000000103ffc > sp: 0xc00000005051f670 lr: 0xc0000000000f60a8 > sp: 0xc00000005051f850 lr: 0xc0000000000f18c0 > sp: 0xc00000005051fa10 lr: 0xc0000000000f5184 > sp: 0xc00000005051fae0 lr: 0xc0000000000ddf54 > sp: 0xc00000005051fb00 lr: 0xc0000000000dab9c > sp: 0xc00000005051fb90 lr: 0xc0000000000cbf88 > sp: 0xc00000005051fd00 lr: 0xc0000000003e7480 > sp: 0xc00000005051fdb0 lr: 0xc0000000003e7ce4 > sp: 0xc00000005051fe00 lr: 0xc0000000003e7d88 > sp: 0xc00000005051fe20 lr: 0xc00000000000b3a4 > trap : 0x0000000000000c01 > pc : 0x00007fffa6c9d8d0 > msr : 0x900000000280f033 > lr : 0x0000000010090f40 > gpr 0: 0x0000000000000036 > gpr 1: 0x00007fffa62fdd70 > gpr 2: 0x00007fffa6d57300 > gpr 3: 0x000000000000000d > gpr 4: 0x000000002000ae80 > gpr 5: 0x0000000000000000 > gpr 6: 0x0000000000000537 > gpr 7: 0x0000000000000000 > gpr 8: 0x000000000000000d > gpr 9: 0x0000000000000000 > gpr10: 0x0000000000000000 > gpr11: 0x0000000000000000 > gpr12: 0x0000000000000000 > gpr13: 0x00007fffa6306380 > gpr14: 0x0000000000000000 > gpr15: 0x0000000000000001 > gpr16: 0x0000000039ba6928 > gpr17: 0x0000000000000000 > gpr18: 0x0000000000000000 > gpr19: 0x00007fffa6d702f0 > gpr20: 0x00007fffa62fddf0 > gpr21: 0x0000000000000080 > gpr22: 0x0000000000000004 > gpr23: 0x0000000000000000 > gpr24: 0x0000000010ac85c0 > gpr25: 0x0000000000000008 > gpr26: 0x00007fffa62fde10 > gpr27: 0x0000000000000000 > gpr28: 0x0000000000000002 > gpr29: 0x0000000000000000 > gpr30: 0x0000000039ba6900 > gpr31: 0x0000000010ac85c0 > sp: 0x00007fffa62fdd70 > > Signed-off-by: Suraj Jitindar Singh > --- > target/ppc/cpu.h | 1 + > target/ppc/translate.c | 60 +++++++++++++++++++++++++++++++++++++++++ > target/ppc/translate_init.inc.c | 1 + > 3 files changed, 62 insertions(+) > > diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h > index 5e7cf54b2f..28c4dffca1 100644 > --- a/target/ppc/cpu.h > +++ b/target/ppc/cpu.h > @@ -1284,6 +1284,7 @@ struct PPCVirtualHypervisorClass { > void ppc_cpu_do_interrupt(CPUState *cpu); > bool ppc_cpu_exec_interrupt(CPUState *cpu, int int_req); > void ppc_cpu_dump_state(CPUState *cpu, FILE *f, int flags); > +void ppc_cpu_dump_stack(CPUState *cpu, FILE *f); > void ppc_cpu_dump_statistics(CPUState *cpu, int flags); > hwaddr ppc_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); > int ppc_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); > diff --git a/target/ppc/translate.c b/target/ppc/translate.c > index 8d08625c33..b162998ce7 100644 > --- a/target/ppc/translate.c > +++ b/target/ppc/translate.c > @@ -7705,6 +7705,66 @@ void ppc_cpu_dump_state(CPUState *cs, FILE *f, int flags) > #undef RFPL > } > > +struct ppc_pt_regs { > + unsigned long gpr[32]; > + unsigned long nip; > + unsigned long msr; > + unsigned long orig_gpr3; > + unsigned long ctr; > + unsigned long link; > + unsigned long xer; > + unsigned long ccr; > + unsigned long softe; > + unsigned long trap; > + unsigned long dar; > + unsigned long dsisr; > + unsigned long result; > +}; > + > +void ppc_cpu_dump_stack(CPUState *cs, FILE *f) > +{ > +#if defined(TARGET_PPC64) > + PowerPCCPU *cpu = POWERPC_CPU(cs); > + CPUPPCState *env = &cpu->env; > + uint64_t sp, next_sp, lr, buf[4]; > + > + /* stack pointer stored in r1 */ > + sp = env->gpr[1]; > + > + while (sp && (sp & (0xCUL << 60))) { 0xCUL << 60 isn't appropriate for 32-bit hosts. Use 0xCULL instead. > + uint64_t marker = 0UL; > + > + /* read and print LR */ > + cpu_physical_memory_read(sp & ~(0xCUL << 60), buf, sizeof(*buf) * 4); > + next_sp = buf[0]; > + lr = buf[2]; > + qemu_fprintf(f, "sp: 0x%.16lx lr: 0x%.16lx\n", sp, lr); > + sp &= ~(0xCUL << 60); > + > + /* Does the stackframe contain regs? */ > + cpu_physical_memory_read(sp + 96, &marker, sizeof(marker)); > + if (marker == 0x7265677368657265) { /* regshere */ > + struct ppc_pt_regs regs; > + int i; > + > + cpu_physical_memory_read(sp + 112, ®s, sizeof(regs)); > + > + qemu_fprintf(f, "\ttrap : 0x%.16lx\n", regs.trap); > + qemu_fprintf(f, "\tpc : 0x%.16lx\n", regs.nip); > + qemu_fprintf(f, "\tmsr : 0x%.16lx\n", regs.msr); > + qemu_fprintf(f, "\tlr : 0x%.16lx\n", regs.link); > + for (i = 0; i < 32; i++) > + qemu_fprintf(f, "\tgpr%2d: 0x%.16lx\n", i, > + regs.gpr[i]); > + } > + > + sp = next_sp; > + } > + > + qemu_fprintf(f, "sp: 0x%.16lx\n", sp); > +#endif > +} > + > void ppc_cpu_dump_statistics(CPUState *cs, int flags) > { > #if defined(DO_PPC_STATISTICS) > diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c > index 0394a9ddad..3fd24f85cc 100644 > --- a/target/ppc/translate_init.inc.c > +++ b/target/ppc/translate_init.inc.c > @@ -10587,6 +10587,7 @@ static void ppc_cpu_class_init(ObjectClass *oc, void *data) > cc->do_interrupt = ppc_cpu_do_interrupt; > cc->cpu_exec_interrupt = ppc_cpu_exec_interrupt; > cc->dump_state = ppc_cpu_dump_state; > + cc->dump_stack = ppc_cpu_dump_stack; > cc->dump_statistics = ppc_cpu_dump_statistics; > cc->set_pc = ppc_cpu_set_pc; > cc->gdb_read_register = ppc_cpu_gdb_read_register;