Rudolf Marek (r.marek@assembler.cz) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/178
-gerrit
commit 11c5f026823afc880cb490e87be28ae842154e28 Author: Rudolf Marek r.marek@assembler.cz Date: Fri Sep 2 23:23:41 2011 +0200
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 r.marek@assembler.cz --- Makefile.inc | 4 +++ src/Kconfig | 9 ++++++++ src/console/printk.c | 3 ++ src/console/vsprintf.c | 3 ++ src/include/trace.h | 53 ++++++++++++++++++++++++++++++++++++++++++++++++ src/lib/Makefile.inc | 1 + src/lib/trace.c | 39 +++++++++++++++++++++++++++++++++++ src/lib/uart8250.c | 4 +++ 8 files changed, 116 insertions(+), 0 deletions(-)
diff --git a/Makefile.inc b/Makefile.inc index 37e4fb6..167ab5b 100644 --- a/Makefile.inc +++ b/Makefile.inc @@ -51,6 +51,10 @@ classes-y := ramstage romstage driver smm
romstage-c-ccopts:=-D__PRE_RAM__ romstage-S-ccopts:=-D__PRE_RAM__ +ifeq ($(CONFIG_TRACE),y) +ramstage-c-ccopts:= -finstrument-functions +endif + smm-c-ccopts:=-D__SMM__ smm-S-ccopts:=-D__SMM__
diff --git a/src/Kconfig b/src/Kconfig index f96c903..e9ceed5 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -845,6 +845,15 @@ config LLSHELL Put llshell() in your (romstage) code to start the shell. See src/arch/x86/llshell/llshell.inc for details.
+config TRACE + bool "Trace function calls" + default n + help + If enabled, every function will print information to console once + the function is entered. The syntax is ~0xaaaabbbb(0xccccdddd) + the 0xaaaabbbb is the actual function and 0xccccdddd is EIP + of calling function. Please note some printk releated functions + are omitted from trace to have good looking console dumps. endmenu
config LIFT_BSP_APIC_ID diff --git a/src/console/printk.c b/src/console/printk.c index 488d4e5..7549088 100644 --- a/src/console/printk.c +++ b/src/console/printk.c @@ -8,6 +8,7 @@ #include <smp/spinlock.h> #include <console/vtxprintf.h> #include <console/console.h> +#include <trace.h>
int console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL; int default_console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL; @@ -23,6 +24,7 @@ int do_printk(int msg_level, const char *fmt, ...) return 0; }
+ DISABLE_TRACE; spin_lock(&console_lock);
va_start(args, fmt); @@ -32,6 +34,7 @@ int do_printk(int msg_level, const char *fmt, ...) console_tx_flush();
spin_unlock(&console_lock); + ENABLE_TRACE;
return i; } diff --git a/src/console/vsprintf.c b/src/console/vsprintf.c index 4a74523..435401b 100644 --- a/src/console/vsprintf.c +++ b/src/console/vsprintf.c @@ -22,6 +22,7 @@ #include <string.h> #include <smp/spinlock.h> #include <console/vtxprintf.h> +#include <trace.h>
DECLARE_SPIN_LOCK(vsprintf_lock)
@@ -37,6 +38,7 @@ static int vsprintf(char *buf, const char *fmt, va_list args) { int i;
+ DISABLE_TRACE; spin_lock(&vsprintf_lock);
str_buf = buf; @@ -44,6 +46,7 @@ static int vsprintf(char *buf, const char *fmt, va_list args) *str_buf = '\0';
spin_unlock(&vsprintf_lock); + ENABLE_TRACE;
return i; } diff --git a/src/include/trace.h b/src/include/trace.h new file mode 100644 index 0000000..9f90766 --- /dev/null +++ b/src/include/trace.h @@ -0,0 +1,53 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Rudolf Marek r.marek@assembler.cz + * + * 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 + */ + +#ifndef __TRACE_H +#define __TRACE_H + +void __cyg_profile_func_enter( void *, void * ) + __attribute__ ((no_instrument_function)); + +void __cyg_profile_func_exit( void *, void * ) + __attribute__ ((no_instrument_function)); + +extern volatile int trace_dis; + +#ifdef __PRE_RAM__ + +#define DISABLE_TRACE +#define ENABLE_TRACE +#define DISABLE_TRACE_ON_FUNCTION + +#else /* !__PRE_RAM__ */ + +#if CONFIG_TRACE + +#define DISABLE_TRACE do { trace_dis = 1; } while (0); +#define ENABLE_TRACE do { trace_dis = 0; } while (0); +#define DISABLE_TRACE_ON_FUNCTION __attribute__ ((no_instrument_function)); + +#else /* !CONFIG_TRACE */ + +#define DISABLE_TRACE +#define ENABLE_TRACE +#define DISABLE_TRACE_ON_FUNCTION + +#endif +#endif +#endif diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc index 54935ca..3d8e889 100644 --- a/src/lib/Makefile.inc +++ b/src/lib/Makefile.inc @@ -14,6 +14,7 @@ romstage-$(CONFIG_CONSOLE_NE2K) += ne2k.c romstage-$(CONFIG_CONSOLE_NE2K) += compute_ip_checksum.c romstage-$(CONFIG_USBDEBUG) += usbdebug.c
+ramstage-y += trace.c ramstage-y += memset.c ramstage-y += memcpy.c ramstage-y += memcmp.c diff --git a/src/lib/trace.c b/src/lib/trace.c new file mode 100644 index 0000000..8736c82 --- /dev/null +++ b/src/lib/trace.c @@ -0,0 +1,39 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Rudolf Marek r.marek@assembler.cz + * + * 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 <types.h> +#include <console/console.h> +#include <trace.h> + +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 ) +{ +} diff --git a/src/lib/uart8250.c b/src/lib/uart8250.c index e7ddd0b..b224671 100644 --- a/src/lib/uart8250.c +++ b/src/lib/uart8250.c @@ -21,6 +21,8 @@ #include <arch/io.h> #include <uart8250.h> #include <pc80/mc146818rtc.h> +#include <trace.h> + #if CONFIG_USE_OPTION_TABLE #include "option_table.h" #endif @@ -69,6 +71,7 @@ unsigned char uart8250_rx_byte(unsigned base_port)
void uart8250_init(unsigned base_port, unsigned divisor) { + DISABLE_TRACE; /* Disable interrupts */ outb(0x0, base_port + UART_IER); /* Enable FIFOs */ @@ -86,6 +89,7 @@ void uart8250_init(unsigned base_port, unsigned divisor)
/* Set to 3 for 8N1 */ outb(CONFIG_TTYS0_LCS, base_port + UART_LCR); + ENABLE_TRACE; }
void uart_init(void)