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https://github.com/golang/go
synced 2024-10-05 04:21:22 -06:00
6c196015e0
* correct symbol table size * do not reorder functions in output * traceback * signal handling * use same code for go + defer * handle leaf functions in symbol table R=kaib, dpx CC=golang-dev https://golang.org/cl/884041
54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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// returns number of words that the fp instruction is occupying
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static uint32
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isfltinstr(uint32 *pc)
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{
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uint32 i;
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uint32 c;
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i = *pc;
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c = i >> 25 & 7;
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switch(c) {
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case 6: // 110
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//printf(" %p coproc multi: %x\n", pc, i);
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return 1;
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case 7: // 111
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if (i>>24 & 1) return 0; // ignore swi
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//printf(" %p coproc %x\n", pc, i);
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return 1;
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}
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// lookahead for virtual instructions that span multiple arm instructions
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c = ((*pc & 0x0f000000) >> 16) |
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((*(pc + 1) & 0x0f000000) >> 20) |
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((*(pc + 2) & 0x0f000000) >> 24);
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if(c == 0x50d) {
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//printf(" %p coproc const %x\n", pc, i);
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return 3;
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}
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//printf(" %p %x\n", pc, i);
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return 0;
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}
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#pragma textflag 7
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uint32*
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_sfloat2(uint32 *lr, uint32 r0)
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{
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uint32 skip;
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//printf("softfloat: pre %p\n", lr);
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while(skip = isfltinstr(lr))
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lr += skip;
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//printf(" post: %p\n", lr);
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return lr;
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}
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