From patchwork Wed Sep 7 15:42:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1675321 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20210112 header.b=IhQTEKHb; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4MN62q4cdSz1yhP for ; Thu, 8 Sep 2022 01:42:43 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4MN62k4MpPz3bgC for ; Thu, 8 Sep 2022 01:42:38 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20210112 header.b=IhQTEKHb; dkim-atps=neutral X-Original-To: skiboot@lists.ozlabs.org Delivered-To: skiboot@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::102d; helo=mail-pj1-x102d.google.com; envelope-from=npiggin@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20210112 header.b=IhQTEKHb; dkim-atps=neutral Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4MN62f15l5z3bZB for ; Thu, 8 Sep 2022 01:42:32 +1000 (AEST) Received: by mail-pj1-x102d.google.com with SMTP id fv3so8840690pjb.0 for ; Wed, 07 Sep 2022 08:42:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date; bh=FGC7VIVVYiGTWb5mqApM7txBQedxNc8DOgPBguNdnB0=; b=IhQTEKHbHqkXQt5BN3YqSukqlklK0JU8dm7rIwOwRJ9UPSXZUAzrGIbR+H/T2Pf9ol sWlsMfs/FR2iX6MdwR2m3fBT+ZC1/DhM9r75hzfA9+LUtEbKlk4O7TkXRl23el40Zlux uHDzGWjFh6agp4hS+qeSUbWTy0k/5eJ0LUkvx9NVj7sHrI8LM1XkrrNxuGALJmjb/AgR AUsz6/aS3UXJOoalumlfnEsyHu3K1MhwwE92XmpLzsJ/lOiZ85Y6x1WWELI179qdzbTe qyYgkTfk+16quad2+TC/Lav6sL4FnkTbae6x5QAfPYxcjWNRnfKyucpKq2LDKOrfBAuH eg+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date; bh=FGC7VIVVYiGTWb5mqApM7txBQedxNc8DOgPBguNdnB0=; b=d0pegxZCj+tAVJBJ/ej+szwSC66xksnoNf+2vY3btm9MVV8aSJ69pIitMw1D6wVj1Z Y0qQcruYrQZ3HVHcDwOLHdXx34ca1Y6Pbi0aTPpOavB2A1pp6Sp79ZzNMdpgpHTplQMr t038GQEgvnPn9qdqU8/9Xs1cqGP9l3Zu8SdktyxzWSmPhn+pDakMxvuLLJejQp/Ow4We A7+vLRSSj3tzezSKMCghdJ7DL8Dnf02w1SabM3tfOwd4adHR6iX/1o1clIqWxITChaLi F6nFy5tEEsJepuuOhZ9RKh47fI0N+P17Fsd/OLpbL/lGTmOSto4XQtFZ+PagffYuZZwH ZUrw== X-Gm-Message-State: ACgBeo1SwsUwOfjjjfG4QYHO0A9E6OuVP4ENp7dJOmCdx+DMLafdTuN3 hMDoNUD3ec/diu23nhHI4o4GXwIgOG0= X-Google-Smtp-Source: AA6agR4zHitlthoArCoZbMxdXExr1RiKFEgD8I6UjoRU287+kLZOQgs2UUh7GFgaKzqRmfQMOc0mxw== X-Received: by 2002:a17:902:db06:b0:16f:16b7:69d0 with SMTP id m6-20020a170902db0600b0016f16b769d0mr4413293plx.145.1662565348375; Wed, 07 Sep 2022 08:42:28 -0700 (PDT) Received: from bobo.ozlabs.ibm.com ([124.170.18.239]) by smtp.gmail.com with ESMTPSA id u4-20020a170902e80400b00176cdd80148sm4653394plg.305.2022.09.07.08.42.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Sep 2022 08:42:27 -0700 (PDT) From: Nicholas Piggin To: skiboot@lists.ozlabs.org Date: Thu, 8 Sep 2022 01:42:18 +1000 Message-Id: <20220907154218.3879207-1-npiggin@gmail.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 Subject: [Skiboot] [PATCH] external/mambo: add a poor man's ftrace command X-BeenThere: skiboot@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Mailing list for skiboot development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Skiboot" Add an ftrace command that steps instructions and prints the symbol whenever it changes. This can be helpful for low level debugging. Signed-off-by: Nicholas Piggin --- external/mambo/mambo_utils.tcl | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/external/mambo/mambo_utils.tcl b/external/mambo/mambo_utils.tcl index 96f8971a..6d1425a0 100644 --- a/external/mambo/mambo_utils.tcl +++ b/external/mambo/mambo_utils.tcl @@ -169,6 +169,32 @@ proc s { {nr 1} } { } } +proc ftrace { {nr 1} } { + upvar #0 target_t t + upvar #0 target_c c + upvar #0 target_p p + + set pc [mysim cpu $p:$c:$t display spr pc] + set sym [lindex [split [addr2func $pc] {+}] 0] + set prev_pc $pc + + puts [ipc] + puts "$sym" + + for { set i 0 } { $i < $nr } { incr i 1 } { + set pc [mysim cpu $p:$c:$t display spr pc] + set sym2 [lindex [split [addr2func $pc] {+}] 0] + + if { $sym2 != $sym } { + puts "$sym2 \t\t(from [addr2func $prev_pc])" + set sym $sym2 + } + set prev_pc $pc + + mysim step 1 + } +} + proc S { {nr 1} } { upvar #0 target_t t upvar #0 target_c c