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nexedi
linux
Commits
0dd3cc51
Commit
0dd3cc51
authored
Oct 08, 2002
by
Martin Schwidefsky
Committed by
Linus Torvalds
Oct 08, 2002
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Plain Diff
[PATCH] s390 update: syscall tracing
Pass the system call number in grp2 to strace instead of -ENOSYS.
parent
b579a8f7
Changes
2
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Showing
2 changed files
with
20 additions
and
22 deletions
+20
-22
arch/s390/kernel/entry.S
arch/s390/kernel/entry.S
+9
-9
arch/s390x/kernel/entry.S
arch/s390x/kernel/entry.S
+11
-13
No files found.
arch/s390/kernel/entry.S
View file @
0dd3cc51
...
...
@@ -177,11 +177,11 @@ do_call_base:
system_call
:
SAVE_ALL_BASE
SAVE_ALL
__LC_SVC_OLD_PSW
,
1
lh
%
r8
,
0x8a
#
get
svc
number
from
lowcore
sll
%
r8
,
2
lh
%
r7
,
0x8a
#
get
svc
number
from
lowcore
GET_THREAD_INFO
#
load
pointer
to
task_struct
to
R9
sll
%
r7
,
2
stosm
24
(%
r15
),
0x03
#
reenable
interrupts
l
%
r8
,
sys_call_table
-
entry_base
(%
r
8
,%
r13
)
#
get
system
call
addr
.
l
%
r8
,
sys_call_table
-
entry_base
(%
r
7
,%
r13
)
#
get
system
call
addr
.
tm
__TI_flags
+
3
(%
r9
),
_TIF_SYSCALL_TRACE
bo
BASED
(
sysc_tracesys
)
basr
%
r14
,%
r8
#
call
sys_xxxx
...
...
@@ -241,13 +241,13 @@ sysc_sigpending:
#
sysc_tracesys
:
l
%
r1
,
BASED
(
.
Ltrace
)
mvc
SP_R2
(
4
,%
r15
),
BASED
(
.
Lc_ENOSYS
)
srl
%
r7
,
2
st
%
r7
,
SP_R2
(
4
,%
r15
)
basr
%
r14
,%
r1
clc
SP_R2
(
4
,%
r15
),
BASED
(
.
Lc256
)
bnl
BASED
(
sysc_tracego
)
l
%
r8
,
SP_R2
(%
r15
)
#
strace
changed
the
syscall
sll
%
r8
,
2
l
%
r8
,
sys_call_table
-
entry_base
(%
r8
,%
r13
)
l
%
r7
,
SP_R2
(
4
,%
r15
)
#
strace
might
have
changed
the
n
%
r7
,
BASED
(
.
Lc256
)
#
system
call
sll
%
r7
,
2
l
%
r8
,
sys_call_table
-
entry_base
(%
r7
,%
r13
)
sysc_tracego
:
lm
%
r3
,%
r6
,
SP_R3
(%
r15
)
l
%
r2
,
SP_ORIG_R2
(%
r15
)
...
...
arch/s390x/kernel/entry.S
View file @
0dd3cc51
...
...
@@ -158,16 +158,16 @@ do_call_softirq:
.
globl
system_call
system_call
:
SAVE_ALL
__LC_SVC_OLD_PSW
,
1
llgh
%
r
8
,
__LC_SVC_INT_CODE
#
get
svc
number
from
lowcore
llgh
%
r
7
,
__LC_SVC_INT_CODE
#
get
svc
number
from
lowcore
GET_THREAD_INFO
#
load
pointer
to
task_struct
to
R9
stosm
48
(%
r15
),
0x03
#
reenable
interrupts
larl
%
r
7
,
sys_call_table
sll
%
r
8
,
3
larl
%
r
10
,
sys_call_table
sll
%
r
7
,
3
tm
SP_PSW
+
3
(%
r15
),
0x01
#
are
we
running
in
31
bit
mode
?
jo
sysc_noemu
la
%
r
7
,
4
(%
r7
)
#
use
31
bit
emulation
system
calls
la
%
r
10
,
4
(%
r10
)
#
use
31
bit
emulation
system
calls
sysc_noemu
:
lgf
%
r8
,
0
(%
r
8
,%
r7
)
#
load
address
of
system
call
routine
lgf
%
r8
,
0
(%
r
7
,%
r10
)
#
load
address
of
system
call
routine
tm
__TI_flags
+
7
(%
r9
),
_TIF_SYSCALL_TRACE
jo
sysc_tracesys
basr
%
r14
,%
r8
#
call
sys_xxxx
...
...
@@ -225,15 +225,13 @@ sysc_sigpending:
#
special
linkage
:
%
r12
contains
the
return
address
for
trace_svc
#
sysc_tracesys
:
lghi
%
r0
,-
ENOSYS
stg
%
r
0
,
SP_R2
(%
r15
)
#
give
sysc_trace
an
-
ENOSYS
retval
srl
%
r7
,
3
stg
%
r
7
,
SP_R2
(%
r15
)
brasl
%
r14
,
syscall_trace
larl
%
r6
,
.
Lc256
clc
SP_R2
(
8
,%
r15
),
0
(%
r6
)
jnl
sysc_tracego
lg
%
r2
,
SP_R2
(%
r15
)
sllg
%
r2
,%
r2
,
3
#
strace
wants
to
change
the
syscall
lgf
%
r8
,
0
(%
r2
,%
r7
)
lghi
%
r7
,
255
#
strace
might
have
changed
the
ng
%
r7
,
SP_R2
(%
r15
)
#
the
system
call
sll
%
r7
,
3
lgf
%
r8
,
0
(%
r7
,%
r10
)
sysc_tracego
:
lmg
%
r3
,%
r6
,
SP_R3
(%
r15
)
lg
%
r2
,
SP_ORIG_R2
(%
r15
)
...
...
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