2010/12/17 乔崇 <qiaochong@xxxxxxxxxxx>:
是的，是没有action的原因。
1.发现一个错误,mips has reg 31,which is ra.
diff --git a/lib/gtp.c b/lib/gtp.c
index 07fea25..978ecf2 100644
--- a/lib/gtp.c
+++ b/lib/gtp.c
@@ -582,7 +582,7 @@ gtp_action_reg_read(struct pt_regs *regs, struct
gtp_entry *tpe, int num)
num -= 90;
}
- if (num >= 0 && num < 31) {
+ if (num >= 0 && num <= 31) {
ret = regs->regs[num];
} else {
switch (num) {
多谢 一会我改掉
2.
sudo gdb72 vmlinux
GNU gdb (GDB) 7.2.50.20101216-cvs
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=mipsel-unknown-linux-gnu
--target=mipsel-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /work/rt4ls/vmlinux...done.
(gdb) target remote /proc/gtp
Remote debugging using /proc/gtp
0x0000000000000000 in ?? ()
(gdb) trace ext3_lookup
Tracepoint 1 at 0xffffffff80382654: file fs/ext3/namei.c, line 1036.
(gdb) actions
Enter actions for tracepoint 1, one per line.
End with a line saying just "end".
collect *(unsigned char *)$rsp@512
$rsp is not a trace state variable; GDB agent expressions cannot use
convenience variables.
是我gdb版本的问题吗？
为什么$rsp用不了，另外怎么查看都有那些trace state variable.
$rsp是amd64的sp寄存器 你换成mips 29 寄存器 $29 也许$sp就可以
还有commands和action对于高版本的gdb来说有区别吗?
里面是一样的 其实commands更好 可以对单个或者多个tracepoint 设置action 其实再作个action我都不知道有哈用
Hui Zhu 写道:
这个LOG清晰一点了 看起来貌似是因为你没设置任何ACTION 而KGTP处理没有ACTION的tracepoint的时候有点问题
一会我编完新KERNEL就测试一下这个问题
多谢你报这个BUG
Thanks,
Hui
2010/12/17 乔崇 <qiaochong@xxxxxxxxxxx>:
1.gdb infomation
GNU gdb (GDB) 7.2.50.20101216-cvs
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=mipsel-unknown-linux-gnu
--target=mipsel-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /work/rt4ls/vmlinux...done.
(gdb)target remote /pro/gtp
Remote debugging using /proc/gtp
sending:
"qSupported:qRelocInsn+"
received:
"ConditionalTracepoints+;TracepointSource+;DisconnectedTracing+"
sending:
"Hg0"
received:
""
sending:
"?"
received:
"S05"
sending:
"Hc-1"
received:
""
sending:
"qC"
received:
""
sending:
"qAttached"
received:
""
sending:
"qOffsets"
received:
""
sending:
"Hg0"
received:
""
sending:
"g"
received:
"00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
sending:
"g"
received:
"00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
sending:
"m0,4"
received:
"E0e"
sending:
"mfffffffffffffffc,4"
received:
"E0e"
sending:
"m0,4"
received:
"E0e"
0x0000000000000000 in ?? ()
sending:
"qSymbol::"
received:
""
sending:
"qTStatus"
received:
"T0;tnotrun:0;tframes:0;tcreated:0;tsize:500000;tfree:500000;circular:0;disconn:0"
remote_get_noisy_reply():
T0;tnotrun:0;tframes:0;tcreated:0;tsize:500000;tfree:500000;circular:0;disconn:0
sending:
"qTfV"
received:
"1:0:1:63757272656e745f7461736b"
sending:
"qTsV"
received:
"l"
sending:
"qTfP"
received:
"l"
(gdb) trace ext3_lookup
sending:
"mffffffff80382654,4"
received:
"3400a28c"
Tracepoint 1 at 0xffffffff80382654: file fs/ext3/namei.c, line 1036.
(gdb) tstart
sending:
"QTinit"
received:
"OK"
remote_get_noisy_reply():
OK
sending:
"QTDP:1:ffffffff80382654:E:0:0"
received:
"E16"
remote_get_noisy_reply():
E16
remote.c: error in outgoing packet at field #6.
(gdb) quit
A debugging session is active.
Inferior 1 [Remote target] will be killed.
Quit anyway? (y or n) sending:
"qTStatus"
received:
"T0;tnotrun:0;tframes:0;tcreated:0;tsize:500000;tfree:500000;circular:0;disconn:0"
remote_get_noisy_reply():
T0;tnotrun:0;tframes:0;tcreated:0;tsize:500000;tfree:500000;circular:0;disconn:0
sending:
"k"
2.gtp printk msg
[25845.244000] gtp_open
[25845.244000] gtp_ioctl: 540d
[25845.244000] gtp_ioctl: 540d
[25845.244000] gtp_ioctl: 540e
[25845.244000] gtp_ioctl: 540d
[25845.244000] gtp_ioctl: 5407
[25845.244000] gtp_write: qSupported:qRelocInsn+
[25845.244000] gtp_ioctl: 540d
[25845.244000] gtp_ioctl: 540d
[25845.244000] gtp_ioctl: 540e
[25845.244000] gtp_ioctl: 540d
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: Hg0
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: ?
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: Hc-1
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: qC
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: qAttached
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: qOffsets
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: Hg0
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.244000] gtp_write: g
[25845.244000] gtp_read
[25845.244000] gtp_read
[25845.260000] gtp_write: g
[25845.260000] gtp_read
[25845.260000] gtp_read
[25845.272000] gtp_write: m0,4
[25845.272000] gtp_gdbrsp_m: addr = 0x0 len = 4
[25845.272000] gtp_read
[25845.272000] gtp_read
[25845.272000] gtp_write: mfffffffffffffffc,4
[25845.272000] gtp_gdbrsp_m: addr = 0xfffffffffffffffc len = 4
[25845.272000] gtp_read
[25845.272000] gtp_read
[25845.336000] gtp_write: m0,4
[25845.336000] gtp_gdbrsp_m: addr = 0x0 len = 4
[25845.336000] gtp_read
[25845.336000] gtp_read
[25845.348000] gtp_write: qSymbol::
[25845.348000] gtp_read
[25845.348000] gtp_read
[25845.348000] gtp_write: qTStatus
[25845.348000] gtp_gdbrsp_qT: Status
[25845.348000] gtp_read
[25845.348000] gtp_read
[25845.348000] gtp_write: qTfV
[25845.348000] gtp_gdbrsp_qT: fV
[25845.348000] gtp_read
[25845.348000] gtp_read
[25845.352000] gtp_write: qTsV
[25845.352000] gtp_gdbrsp_qT: sV
[25845.352000] gtp_read
[25845.352000] gtp_read
[25845.352000] gtp_write: qTfP
[25845.352000] gtp_gdbrsp_qT: fP
[25845.352000] gtp_read
[25845.352000] gtp_read
[25856.372000] gtp_write: mffffffff80382654,4
[25856.372000] gtp_gdbrsp_m: addr = 0xffffffff80382654 len = 4
[25856.372000] gtp_gdbrsp_m: 0 34
[25856.372000] gtp_gdbrsp_m: 1 00
[25856.372000] gtp_gdbrsp_m: 2 a2
[25856.372000] gtp_gdbrsp_m: 3 8c
[25856.372000] gtp_read
[25856.372000] gtp_read
[25859.272000] gtp_write: QTinit
[25859.272000] gtp_gdbrsp_QT: init
[25859.272000] gtp_gdbrsp_qtinit
[25859.272000] gtp_gdbrsp_QT: return 0
[25859.272000] gtp_read
[25859.272000] gtp_read
[25859.272000] gtp_write: QTDP:1:ffffffff80382654:E:0:0
[25859.272000] gtp_gdbrsp_QT: DP:1:ffffffff80382654:E:0:0
[25859.272000] gtp_gdbrsp_qtdp: 1:ffffffff80382654:E:0:0
[25859.272000] gtp_gdbrsp_QT: return -22
[25859.272000] gtp_read
[25859.272000] gtp_read
[25863.180000] gtp_write: qTStatus
[25863.180000] gtp_gdbrsp_qT: Status
[25863.180000] gtp_read
[25863.180000] gtp_read
[25863.180000] gtp_write: k
[25863.180000] gtp_read
[25863.180000] gtp_release
[25863.180000] gtp_gdbrsp_qtstop
[25863.180000] gtp_gdbrsp_qtinit
--
乔崇 qiaochong@xxxxxxxxxxx
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2010年 12月 17日 星期五 13:33:55 CST
