Hi Greg,
I was looking at the common entry.S file in the latest 5307 directory
and found that a small patch has been left out. Without this patch
gdbserver and strace don't work correctly. (I believe the original
authors are Philippe De Muyter and Stuart Hughes.) Could you
apply this patch?
Thanks,
Matt Waddel
strace output without the patch
-----------------------------------------
# strace ls
execve("/bin/ls", ["ls"], [/* 5 vars */]) = 0
bin etc lib mnt proc sbin tmp var
dev home linuxrc opt root sys usr
#
strace output with the patch
-------------------------------------
# strace ls
execve("/bin/ls", ["ls"], [/* 5 vars */]) = 0
ioctl(0, SNDCTL_TMR_TIMEBASE, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE, {B115200 opost isig icanon echo ...}) = 0
getuid32() = 0
getgid32() = 0
setgid32(0) = 0
setuid32(0) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE, {B115200 opost isig icanon echo ...}) = 0
lstat(".", {st_mode=S_IFDIR|0755, st_size=32, ...}) = 0
open(".", O_RDONLY|O_NONBLOCK|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0755, st_size=32, ...}) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
(a lot more stuff)
...
diff --git a/arch/m68knommu/platform/5307/entry.S b/arch/m68knommu/platform/5307/entry.S
index a8cd867..b333731 100644
--- a/arch/m68knommu/platform/5307/entry.S
+++ b/arch/m68knommu/platform/5307/entry.S
@@ -74,7 +74,8 @@ ENTRY(system_call)
movel %sp,%d2 /* get thread_info pointer */
andl #-THREAD_SIZE,%d2 /* at start of kernel stack */
movel %d2,%a0
- movel %sp,%a0@(THREAD_ESP0) /* save top of frame */
+ movel %a0@,%a1 /* save top of frame */
+ movel %sp,%a1@(TASK_THREAD+THREAD_ESP0)
btst #(TIF_SYSCALL_TRACE%8),%a0@(TI_FLAGS+(31-TIF_SYSCALL_TRACE)/8)
bnes 1f
@@ -83,6 +84,8 @@ ENTRY(system_call)
movel %d0,%sp@(PT_D0) /* save the return value */
jra ret_from_exception
1:
+ movel #-ENOSYS,%d2 /* strace needs -ENOSYS in PT_D0 */
+ movel %d2,PT_D0(%sp) /* on syscall entry */
subql #4,%sp
SAVE_SWITCH_STACK
jbsr syscall_trace
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