projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 99714846 KB |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Ralph Campbell. | |
| 7 | * | |
| 8 | * %sccs.include.redist.c% | |
| 9 | */ | |
| 10 | ||
| f1e99c02 KB |
11 | #include "DEFS.h" |
| 12 | ||
| 99714846 | 13 | #if defined(LIBC_SCCS) && !defined(lint) |
| f1e99c02 | 14 | ASMSTR("@(#)_setjmp.s 5.2 (Berkeley) %G%") |
| 99714846 KB |
15 | #endif /* LIBC_SCCS and not lint */ |
| 16 | ||
| 99714846 KB |
17 | /* |
| 18 | * C library -- _setjmp, _longjmp | |
| 19 | * | |
| 20 | * _longjmp(a,v) | |
| 21 | * will generate a "return(v)" from | |
| 22 | * the last call to | |
| 23 | * _setjmp(a) | |
| 24 | * by restoring registers from the stack, | |
| 25 | * The previous signal state is NOT restored. | |
| 26 | */ | |
| 27 | ||
| 28 | LEAF(_setjmp) | |
| 29 | li v0, 0xACEDBADE # sigcontext magic number | |
| 30 | sw ra, (2 * 4)(a0) # sc_pc = return address | |
| 31 | sw v0, (3 * 4)(a0) # saved in sc_regs[0] | |
| 32 | sw s0, ((S0 + 3) * 4)(a0) | |
| 33 | sw s1, ((S1 + 3) * 4)(a0) | |
| 34 | sw s2, ((S2 + 3) * 4)(a0) | |
| 35 | sw s3, ((S3 + 3) * 4)(a0) | |
| 36 | sw s4, ((S4 + 3) * 4)(a0) | |
| 37 | sw s5, ((S5 + 3) * 4)(a0) | |
| 38 | sw s6, ((S6 + 3) * 4)(a0) | |
| 39 | sw s7, ((S7 + 3) * 4)(a0) | |
| 40 | sw sp, ((SP + 3) * 4)(a0) | |
| 41 | sw s8, ((S8 + 3) * 4)(a0) | |
| 42 | cfc1 v0, $31 # too bad can't check if FP used | |
| 43 | swc1 $f20, ((20 + 38) * 4)(a0) | |
| 44 | swc1 $f21, ((21 + 38) * 4)(a0) | |
| 45 | swc1 $f22, ((22 + 38) * 4)(a0) | |
| 46 | swc1 $f23, ((23 + 38) * 4)(a0) | |
| 47 | swc1 $f24, ((24 + 38) * 4)(a0) | |
| 48 | swc1 $f25, ((25 + 38) * 4)(a0) | |
| 49 | swc1 $f26, ((26 + 38) * 4)(a0) | |
| 50 | swc1 $f27, ((27 + 38) * 4)(a0) | |
| 51 | swc1 $f28, ((28 + 38) * 4)(a0) | |
| 52 | swc1 $f29, ((29 + 38) * 4)(a0) | |
| 53 | swc1 $f30, ((30 + 38) * 4)(a0) | |
| 54 | swc1 $f31, ((31 + 38) * 4)(a0) | |
| 55 | sw v0, ((32 + 38) * 4)(a0) | |
| 56 | move v0, zero | |
| 57 | j ra | |
| 58 | END(_setjmp) | |
| 59 | ||
| 60 | LEAF(_longjmp) | |
| 61 | lw v0, (3 * 4)(a0) # get magic number | |
| 62 | bne v0, 0xACEDBADE, botch # jump if error | |
| 63 | lw ra, (2 * 4)(a0) | |
| 64 | lw s0, ((S0 + 3) * 4)(a0) | |
| 65 | lw s1, ((S1 + 3) * 4)(a0) | |
| 66 | lw s2, ((S2 + 3) * 4)(a0) | |
| 67 | lw s3, ((S3 + 3) * 4)(a0) | |
| 68 | lw s4, ((S4 + 3) * 4)(a0) | |
| 69 | lw s5, ((S5 + 3) * 4)(a0) | |
| 70 | lw s6, ((S6 + 3) * 4)(a0) | |
| 71 | lw s7, ((S7 + 3) * 4)(a0) | |
| 72 | lw sp, ((SP + 3) * 4)(a0) | |
| 73 | lw s8, ((S8 + 3) * 4)(a0) | |
| 74 | lw v0, ((32 + 38) * 4)(a0) # get fpu status | |
| 75 | ctc1 v0, $31 | |
| 76 | lwc1 $f20, ((20 + 38) * 4)(a0) | |
| 77 | lwc1 $f21, ((21 + 38) * 4)(a0) | |
| 78 | lwc1 $f22, ((22 + 38) * 4)(a0) | |
| 79 | lwc1 $f23, ((23 + 38) * 4)(a0) | |
| 80 | lwc1 $f24, ((24 + 38) * 4)(a0) | |
| 81 | lwc1 $f25, ((25 + 38) * 4)(a0) | |
| 82 | lwc1 $f26, ((26 + 38) * 4)(a0) | |
| 83 | lwc1 $f27, ((27 + 38) * 4)(a0) | |
| 84 | lwc1 $f28, ((28 + 38) * 4)(a0) | |
| 85 | lwc1 $f29, ((29 + 38) * 4)(a0) | |
| 86 | lwc1 $f30, ((30 + 38) * 4)(a0) | |
| 87 | lwc1 $f31, ((31 + 38) * 4)(a0) | |
| 88 | move v0, a1 | |
| 89 | j ra | |
| 90 | botch: | |
| 91 | jal longjmperror | |
| 92 | jal abort | |
| 93 | END(_longjmp) |