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| author | rsc <devnull@localhost> | 2005-05-01 18:38:12 +0000 |
|---|---|---|
| committer | rsc <devnull@localhost> | 2005-05-01 18:38:12 +0000 |
| commit | cea10000c59882b43525e4fd4fb17a55b7dba1c1 (patch) | |
| tree | 63e81981a798e074e7de146e23c8e16eaf3a26dc /src/libthread/OpenBSD-power-asm.S | |
| parent | e9ad899486adb4c561e682ced74ac0cb1c4539fc (diff) | |
| download | plan9port-cea10000c59882b43525e4fd4fb17a55b7dba1c1.tar.gz plan9port-cea10000c59882b43525e4fd4fb17a55b7dba1c1.tar.bz2 plan9port-cea10000c59882b43525e4fd4fb17a55b7dba1c1.zip | |
OpenBSD/power support.
Diffstat (limited to 'src/libthread/OpenBSD-power-asm.S')
| -rw-r--r-- | src/libthread/OpenBSD-power-asm.S | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/libthread/OpenBSD-power-asm.S b/src/libthread/OpenBSD-power-asm.S new file mode 100644 index 00000000..25ceb45c --- /dev/null +++ b/src/libthread/OpenBSD-power-asm.S @@ -0,0 +1,125 @@ +#include <sys/syscall.h> +#include <machine/asm.h> + +ENTRY(_tas) + li %r0, 0 + mr %r4, %r3 + lis %r5, 0xcafe + ori %r5, %r5, 0xbabe +1: + lwarx %r3, %r0, %r4 + cmpwi %r3, 0 + bne 2f + stwcx. %r5, %r0, %r4 + bne- 1b +2: + sync + blr + +ENTRY(_getmcontext) /* xxx: instruction scheduling */ + mflr %r0 + mfcr %r5 + mfctr %r6 + mfxer %r7 + stw %r0, 0*4(%r3) + stw %r5, 1*4(%r3) + stw %r6, 2*4(%r3) + stw %r7, 3*4(%r3) + + stw %r1, 4*4(%r3) + stw %r2, 5*4(%r3) + li %r5, 1 /* return value for setmcontext */ + stw %r5, 6*4(%r3) + + stw %r13, (0+7)*4(%r3) /* callee-save GPRs */ + stw %r14, (1+7)*4(%r3) /* xxx: block move */ + stw %r15, (2+7)*4(%r3) + stw %r16, (3+7)*4(%r3) + stw %r17, (4+7)*4(%r3) + stw %r18, (5+7)*4(%r3) + stw %r19, (6+7)*4(%r3) + stw %r20, (7+7)*4(%r3) + stw %r21, (8+7)*4(%r3) + stw %r22, (9+7)*4(%r3) + stw %r23, (10+7)*4(%r3) + stw %r24, (11+7)*4(%r3) + stw %r25, (12+7)*4(%r3) + stw %r26, (13+7)*4(%r3) + stw %r27, (14+7)*4(%r3) + stw %r28, (15+7)*4(%r3) + stw %r29, (16+7)*4(%r3) + stw %r30, (17+7)*4(%r3) + stw %r31, (18+7)*4(%r3) + + li %r3, 0 /* return */ + blr + +ENTRY(_setmcontext) + lwz %r13, (0+7)*4(%r3) /* callee-save GPRs */ + lwz %r14, (1+7)*4(%r3) /* xxx: block move */ + lwz %r15, (2+7)*4(%r3) + lwz %r16, (3+7)*4(%r3) + lwz %r17, (4+7)*4(%r3) + lwz %r18, (5+7)*4(%r3) + lwz %r19, (6+7)*4(%r3) + lwz %r20, (7+7)*4(%r3) + lwz %r21, (8+7)*4(%r3) + lwz %r22, (9+7)*4(%r3) + lwz %r23, (10+7)*4(%r3) + lwz %r24, (11+7)*4(%r3) + lwz %r25, (12+7)*4(%r3) + lwz %r26, (13+7)*4(%r3) + lwz %r27, (14+7)*4(%r3) + lwz %r28, (15+7)*4(%r3) + lwz %r29, (16+7)*4(%r3) + lwz %r30, (17+7)*4(%r3) + lwz %r31, (18+7)*4(%r3) + + lwz %r1, 4*4(%r3) + lwz %r2, 5*4(%r3) + + lwz %r0, 0*4(%r3) + mtlr %r0 + lwz %r0, 1*4(%r3) + mtcr %r0 /* mtcrf 0xFF, %r0 */ + lwz %r0, 2*4(%r3) + mtctr %r0 + lwz %r0, 3*4(%r3) + mtxer %r0 + + lwz %r3, 6*4(%r3) + blr + +ENTRY(rfork_thread) + /* sanity check */ + cmpwi %r4, 0 + beq 1f + cmpwi %r5, 0 + beq 1f + + mr %r7,%r4 + + /* call rfork */ + li %r0, SYS_rfork + sc + cmpwi %r0, 0 + bne 2f + + /* check if we are parent or child */ + cmpwi %r3, 0 + bnelr + + /* child */ + mtlr %r5 /* fp */ + mr %r3, %r6 /* arg */ + mr %r1, %r7 /* new sp */ + blrl + + /* child returned, call _exit */ + li %r0, SYS_exit + sc +1: + li %r3, -1 +2: + b PIC_PLT(_C_LABEL(__cerror)) + |