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| author | Michael Grundy <grundym@us.ibm.com> | 2006-09-20 15:58:39 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-09-20 15:58:39 +0200 |
| commit | 4ba069b802c29eee066385f9826e2d83716626b4 (patch) | |
| tree | 663159a4d05a49b4133bb9145fc41fb95a6d4132 /arch/s390/kernel/entry.S | |
| parent | 5432114baf0300286a6ca1b0aea549492a379432 (diff) | |
| download | linux-4ba069b802c29eee066385f9826e2d83716626b4.tar.gz | |
[S390] add kprobes support.
Signed-off-by: Michael Grundy <grundym@us.ibm.com>
Signed-off-by: David Wilder <dwilder@us.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/entry.S')
| -rw-r--r-- | arch/s390/kernel/entry.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 5b5799ac8f839..0c712b78a7e82 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -505,6 +505,8 @@ pgm_no_vtime2: mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP + tm SP_PSW+1(%r15),0x01 # kernel per event ? + bz BASED(kernel_per) l %r3,__LC_PGM_ILC # load program interruption code la %r8,0x7f nr %r8,%r3 # clear per-event-bit and ilc @@ -536,6 +538,16 @@ pgm_no_vtime3: stosm __SF_EMPTY(%r15),0x03 # reenable interrupts b BASED(sysc_do_svc) +# +# per was called from kernel, must be kprobes +# +kernel_per: + mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check + la %r2,SP_PTREGS(%r15) # address of register-save area + l %r1,BASED(.Lhandle_per) # load adr. of per handler + la %r14,BASED(sysc_leave) # load adr. of system return + br %r1 # branch to do_single_step + /* * IO interrupt handler routine */ |