[coreboot] Patch set updated for coreboot: e251653 Add an option for Waiting for gdb connection if the gdb stub configuration is chosen.
Denis Carikli (GNUtoo@no-log.org)
gerrit at coreboot.org
Sat Jun 23 02:22:05 CEST 2012
Denis Carikli (GNUtoo at no-log.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1134
-gerrit
commit e251653bf5f5d807218f1822ba950161648e0e34
Author: Denis 'GNUtoo' Carikli <GNUtoo at no-log.org>
Date: Fri Jun 22 15:56:37 2012 +0200
Add an option for Waiting for gdb connection if the gdb stub configuration is chosen.
Here's a quick demonstration on how to use it(tested on M4A785T-M).
(gdb) file ./build/cbfs/fallback/coreboot_ram.debug
Reading symbols from [...]/build/cbfs/fallback/coreboot_ram.debug...done.
(gdb) set remotebaud 115200
(gdb) target remote /dev/ttyUSB0
Remote debugging using /dev/ttyUSB0
_text () at src/arch/x86/lib/c_start.S:85
85 call hardwaremain
Change-Id: Ia49cbecc41deb061433bc39f5b81715da49edc98
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo at no-log.org>
---
src/Kconfig | 7 +++++++
src/arch/x86/lib/c_start.S | 5 ++++-
2 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/src/Kconfig b/src/Kconfig
index 717146d..3453614 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -779,6 +779,13 @@ config GDB_STUB
If enabled, you will be able to set breakpoints for gdb debugging.
See src/arch/x86/lib/c_start.S for details.
+config GDB_WAIT
+ bool "Wait for a GDB connection"
+ default n
+ depends on GDB_STUB
+ help
+ If enabled, coreboot will wait for a GDB connection.
+
config DEBUG_CBFS
bool "Output verbose CBFS debug messages"
default n
diff --git a/src/arch/x86/lib/c_start.S b/src/arch/x86/lib/c_start.S
index 005ac33..fd9dce7 100644
--- a/src/arch/x86/lib/c_start.S
+++ b/src/arch/x86/lib/c_start.S
@@ -78,6 +78,9 @@ _start:
/* Restore the stack location */
movl %ebp, %esp
+#if CONFIG_GDB_WAIT == 1
+ call gdb_stub_breakpoint
+#endif
/* The boot_complete flag has already been pushed */
call hardwaremain
/* NOTREACHED */
@@ -228,7 +231,7 @@ int_hand:
iret
-#if CONFIG_GDB_STUB == 1
+#if CONFIG_GDB_WAIT == 1
.globl gdb_stub_breakpoint
gdb_stub_breakpoint:
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