From nobody Mon Oct 25 13:54:50 2021 X-Original-To: dev-commits-src-branches@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id A63681802EDE; Mon, 25 Oct 2021 13:54:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4HdGff3vL1z3mvh; Mon, 25 Oct 2021 13:54:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4D98F1E85; Mon, 25 Oct 2021 13:54:50 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 19PDsoGH000515; Mon, 25 Oct 2021 13:54:50 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 19PDsoxw000514; Mon, 25 Oct 2021 13:54:50 GMT (envelope-from git) Date: Mon, 25 Oct 2021 13:54:50 GMT Message-Id: <202110251354.19PDsoxw000514@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Andrew Turner Subject: git: dafad94bdb0d - stable/13 - Also print symbols when printing arm64 registers List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-branches@freebsd.org X-BeenThere: dev-commits-src-branches@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: andrew X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: dafad94bdb0d74e4b9bc642afee33f75df8958b2 Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch stable/13 has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=dafad94bdb0d74e4b9bc642afee33f75df8958b2 commit dafad94bdb0d74e4b9bc642afee33f75df8958b2 Author: Andrew Turner AuthorDate: 2021-09-23 10:32:16 +0000 Commit: Andrew Turner CommitDate: 2021-10-25 13:46:44 +0000 Also print symbols when printing arm64 registers When printing arm64 registers because of an exception in the kernel also print the symbol and offset. This can be used to track down why the exception occured without needing external tools. Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D32077 (cherry picked from commit 7ec86b66099124a9c2c88613507a10979cb8b191) --- sys/arm64/arm64/trap.c | 58 ++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 44 insertions(+), 14 deletions(-) diff --git a/sys/arm64/arm64/trap.c b/sys/arm64/arm64/trap.c index 34e3b08b4e75..a8e016d6bb61 100644 --- a/sys/arm64/arm64/trap.c +++ b/sys/arm64/arm64/trap.c @@ -25,6 +25,8 @@ * */ +#include "opt_ddb.h" + #include __FBSDID("$FreeBSD$"); @@ -68,7 +70,8 @@ __FBSDID("$FreeBSD$"); #endif #ifdef DDB -#include +#include +#include #endif /* Called from exception.S */ @@ -78,6 +81,7 @@ void do_el0_error(struct trapframe *); void do_serror(struct trapframe *); void unhandled_exception(struct trapframe *); +static void print_gp_register(const char *name, uint64_t value); static void print_registers(struct trapframe *frame); int (*dtrace_invop_jump_addr)(struct trapframe *); @@ -206,7 +210,7 @@ align_abort(struct thread *td, struct trapframe *frame, uint64_t esr, { if (!lower) { print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Misaligned access from kernel space!"); } @@ -232,7 +236,7 @@ external_abort(struct thread *td, struct trapframe *frame, uint64_t esr, } print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); panic("Unhandled EL%d external data abort", lower ? 0: 1); } @@ -302,7 +306,7 @@ data_abort(struct thread *td, struct trapframe *frame, uint64_t esr, if (td->td_critnest != 0 || WITNESS_CHECK(WARN_SLEEPOK | WARN_GIANTOK, NULL, "Kernel page fault") != 0) { print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("data abort in critical section or under mutex"); } @@ -335,7 +339,7 @@ bad_far: printf("Fatal data abort:\n"); print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); printf(" esr: %.8lx\n", esr); #ifdef KDB @@ -356,18 +360,44 @@ bad_far: userret(td, frame); } +static void +print_gp_register(const char *name, uint64_t value) +{ +#if defined(DDB) + c_db_sym_t sym; + const char *sym_name; + db_expr_t sym_value; + db_expr_t offset; +#endif + + printf(" %s: %16lx", name, value); +#if defined(DDB) + /* If this looks like a kernel address try to find the symbol */ + if (value >= VM_MIN_KERNEL_ADDRESS) { + sym = db_search_symbol(value, DB_STGY_ANY, &offset); + if (sym != C_DB_SYM_NULL) { + db_symbol_values(sym, &sym_name, &sym_value); + printf(" (%s + %lx)", sym_name, offset); + } + } +#endif + printf("\n"); +} + static void print_registers(struct trapframe *frame) { + char name[4]; u_int reg; for (reg = 0; reg < nitems(frame->tf_x); reg++) { - printf(" %sx%d: %16lx\n", (reg < 10) ? " " : "", reg, - frame->tf_x[reg]); + snprintf(name, sizeof(name), "%sx%d", (reg < 10) ? " " : "", + reg); + print_gp_register(name, frame->tf_x[reg]); } printf(" sp: %16lx\n", frame->tf_sp); - printf(" lr: %16lx\n", frame->tf_lr); - printf(" elr: %16lx\n", frame->tf_elr); + print_gp_register(" lr", frame->tf_lr); + print_gp_register("elr", frame->tf_lr); printf("spsr: %8x\n", frame->tf_spsr); } @@ -422,7 +452,7 @@ do_el1h_sync(struct thread *td, struct trapframe *frame) abort_handlers[dfsc](td, frame, esr, far, 0); } else { print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled EL1 %s abort: %x", exception == EXCP_INSN_ABORT ? "instruction" : @@ -457,7 +487,7 @@ do_el1h_sync(struct thread *td, struct trapframe *frame) /* FALLTHROUGH */ default: print_registers(frame); - printf(" far: %16lx\n", READ_SPECIALREG(far_el1)); + print_gp_register("far", READ_SPECIALREG(far_el1)); panic("Unknown kernel exception %x esr_el1 %lx", exception, esr); } @@ -528,7 +558,7 @@ do_el0_sync(struct thread *td, struct trapframe *frame) abort_handlers[dfsc](td, frame, esr, far, 1); else { print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled EL0 %s abort: %x", exception == EXCP_INSN_ABORT_L ? "instruction" : @@ -608,7 +638,7 @@ do_serror(struct trapframe *frame) esr = frame->tf_esr; print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled System Error"); } @@ -622,7 +652,7 @@ unhandled_exception(struct trapframe *frame) esr = frame->tf_esr; print_registers(frame); - printf(" far: %16lx\n", far); + print_gp_register("far", far); printf(" esr: %.8lx\n", esr); panic("Unhandled exception"); }