diff options
Diffstat (limited to 'config/linux/alpha.s')
| -rw-r--r-- | config/linux/alpha.s | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/config/linux/alpha.s b/config/linux/alpha.s new file mode 100644 index 0000000..a4589d4 --- /dev/null +++ b/config/linux/alpha.s @@ -0,0 +1,46 @@ +/* + * coswitch(old_cs, new_cs, first) for Dec Alpha architecture + * $16 $17 $18 + */ + .data +errmsg: .ascii "new_context() returned in coswitch\X00" + + .text + .globl coswitch + .ent coswitch +coswitch: + lda $sp, -72($sp) /* make room on stack */ + stq $sp, 0($16) /* save stack pointer */ + stq $9, 0($sp) /* save registers on stack */ + stq $10, 8($sp) + stq $11, 16($sp) + stq $12, 24($sp) + stq $13, 32($sp) + stq $14, 40($sp) + stq $15, 48($sp) + stq $27, 56($sp) + stq $26, 64($sp) /* return address */ + beq $18, first /* if first time */ + + ldq $sp, 0($17) /* load new stack pointer */ + ldq $9, 0($sp) /* load registers from stack */ + ldq $10, 8($sp) + ldq $11, 16($sp) + ldq $12, 24($sp) + ldq $13, 32($sp) + ldq $14, 40($sp) + ldq $15, 48($sp) + ldq $27, 56($sp) + ldq $26, 64($sp) /* return address */ + lda $sp, 72($sp) /* reset sp */ + jsr_coroutine $31, ($26), 0 /* jump into new_context */ + +first: + ldq $sp, 0($17) /* load stack pointer only */ + bis $31, $31, $16 /* r16 = 0 */ + bis $31, $31, $17 /* r17 = 0 */ + jsr $26, new_context /* new_context(0,0) */ + lda $16, errmsg + jsr $26, syserr /* shouldn't get here */ + + .end coswitch |