From 7f0e93060e720149bb59023d608a67cfc21542b1 Mon Sep 17 00:00:00 2001 From: Rudolf Marek Date: Fri, 2 Sep 2011 23:23:41 +0200 Subject: Add support for the tracing infastructure in coreboot. The compiler is forced to emmit special functions on every entry/exit of the function. Add a compile time option to support it. Function entries will be printed in the console. The CONFIG_TRACE has more documentation. Patch for userspace tools will follow. Change-Id: I2cbeb3f104892b034c8756f86ed05bf71187c3f3 Signed-off-by: Rudolf Marek Reviewed-on: http://review.coreboot.org/178 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/lib/trace.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/lib/trace.c (limited to 'src/lib/trace.c') diff --git a/src/lib/trace.c b/src/lib/trace.c new file mode 100644 index 0000000000..8736c82b65 --- /dev/null +++ b/src/lib/trace.c @@ -0,0 +1,39 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Rudolf Marek + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include + +int volatile trace_dis = 0; + +void __cyg_profile_func_enter( void *func, void *callsite) +{ + + if (trace_dis) + return; + + DISABLE_TRACE + printk(BIOS_INFO, "~0x%08x(0x%08x)\n", (uint32_t) func, (uint32_t) callsite); + ENABLE_TRACE +} + +void __cyg_profile_func_exit( void *func, void *callsite ) +{ +} -- cgit v1.2.3