diff options
| author | Roland McGrath <roland@redhat.com> | 2009-05-28 17:26:38 -0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-08 23:29:25 -0400 |
| commit | ec097c84dff17511f2693e6ef6c3064dfbf0a3af (patch) | |
| tree | 3eac516a13730dcb371c094c0e8d35c9768c9c23 /arch/powerpc/kernel/head_booke.h | |
| parent | dac4ccfb64bcdd5b4c248ccc22903d67486573cd (diff) | |
powerpc: Add PTRACE_SINGLEBLOCK support
Reworked by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This adds block-step support on powerpc, including a PTRACE_SINGLEBLOCK
request for ptrace.
The BookE implementation is tweaked to fire a single step after a
block step in order to mimmic the server behaviour.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/head_booke.h')
| -rw-r--r-- | arch/powerpc/kernel/head_booke.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h index 95f39f1e68d4..5f9febc8d143 100644 --- a/arch/powerpc/kernel/head_booke.h +++ b/arch/powerpc/kernel/head_booke.h | |||
| @@ -256,7 +256,7 @@ label: | |||
| 256 | * off DE in the DSRR1 value and clearing the debug status. \ | 256 | * off DE in the DSRR1 value and clearing the debug status. \ |
| 257 | */ \ | 257 | */ \ |
| 258 | mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \ | 258 | mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \ |
| 259 | andis. r10,r10,DBSR_IC@h; \ | 259 | andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \ |
| 260 | beq+ 2f; \ | 260 | beq+ 2f; \ |
| 261 | \ | 261 | \ |
| 262 | lis r10,KERNELBASE@h; /* check if exception in vectors */ \ | 262 | lis r10,KERNELBASE@h; /* check if exception in vectors */ \ |
| @@ -271,7 +271,7 @@ label: | |||
| 271 | \ | 271 | \ |
| 272 | /* here it looks like we got an inappropriate debug exception. */ \ | 272 | /* here it looks like we got an inappropriate debug exception. */ \ |
| 273 | 1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CDRR1 value */ \ | 273 | 1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CDRR1 value */ \ |
| 274 | lis r10,DBSR_IC@h; /* clear the IC event */ \ | 274 | lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \ |
| 275 | mtspr SPRN_DBSR,r10; \ | 275 | mtspr SPRN_DBSR,r10; \ |
| 276 | /* restore state and get out */ \ | 276 | /* restore state and get out */ \ |
| 277 | lwz r10,_CCR(r11); \ | 277 | lwz r10,_CCR(r11); \ |
| @@ -309,7 +309,7 @@ label: | |||
| 309 | * off DE in the CSRR1 value and clearing the debug status. \ | 309 | * off DE in the CSRR1 value and clearing the debug status. \ |
| 310 | */ \ | 310 | */ \ |
| 311 | mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \ | 311 | mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \ |
| 312 | andis. r10,r10,DBSR_IC@h; \ | 312 | andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \ |
| 313 | beq+ 2f; \ | 313 | beq+ 2f; \ |
| 314 | \ | 314 | \ |
| 315 | lis r10,KERNELBASE@h; /* check if exception in vectors */ \ | 315 | lis r10,KERNELBASE@h; /* check if exception in vectors */ \ |
| @@ -317,14 +317,14 @@ label: | |||
| 317 | cmplw r12,r10; \ | 317 | cmplw r12,r10; \ |
| 318 | blt+ 2f; /* addr below exception vectors */ \ | 318 | blt+ 2f; /* addr below exception vectors */ \ |
| 319 | \ | 319 | \ |
| 320 | lis r10,DebugCrit@h; \ | 320 | lis r10,DebugCrit@h; \ |
| 321 | ori r10,r10,DebugCrit@l; \ | 321 | ori r10,r10,DebugCrit@l; \ |
| 322 | cmplw r12,r10; \ | 322 | cmplw r12,r10; \ |
| 323 | bgt+ 2f; /* addr above exception vectors */ \ | 323 | bgt+ 2f; /* addr above exception vectors */ \ |
| 324 | \ | 324 | \ |
| 325 | /* here it looks like we got an inappropriate debug exception. */ \ | 325 | /* here it looks like we got an inappropriate debug exception. */ \ |
| 326 | 1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CSRR1 value */ \ | 326 | 1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CSRR1 value */ \ |
| 327 | lis r10,DBSR_IC@h; /* clear the IC event */ \ | 327 | lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \ |
| 328 | mtspr SPRN_DBSR,r10; \ | 328 | mtspr SPRN_DBSR,r10; \ |
| 329 | /* restore state and get out */ \ | 329 | /* restore state and get out */ \ |
| 330 | lwz r10,_CCR(r11); \ | 330 | lwz r10,_CCR(r11); \ |