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b481c11e5a
We don't need to save/restore every register -- just those we don't expect to be trashed by function calls.
77 lines
1.9 KiB
ArmAsm
77 lines
1.9 KiB
ArmAsm
/* A setjmp.c for Moxie
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Copyright (C) 2009, 2019 Anthony Green
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The authors hereby grant permission to use, copy, modify, distribute,
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and license this software and its documentation for any purpose, provided
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that existing copyright notices are retained in all copies and that this
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notice is included verbatim in any distributions. No written agreement,
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license, or royalty fee is required for any of the authorized uses.
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Modifications to this software may be copyrighted by their authors
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and need not follow the licensing terms described here, provided that
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the new terms are clearly indicated on the first page of each file where
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they apply. */
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# setjmp/longjmp for moxie. The jmpbuf looks like this:
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#
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# Register jmpbuf offset
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# $r6 0x00
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# $r7 0x04
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# $r8 0x08
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# $r9 0x0c
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# $r10 0x10
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# $fp 0x14
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# $sp 0x18
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# stack frame fp 0x1c
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# stack frame ra 0x20
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# stack frame sc 0x25
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.text
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.global setjmp
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.type setjmp,@function
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setjmp:
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st.l ($r0), $r6
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sto.l 0x04($r0), $r7
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sto.l 0x08($r0), $r8
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sto.l 0x0c($r0), $r9
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sto.l 0x10($r0), $r10
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sto.l 0x14($r0), $sp
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sto.l 0x18($r0), $fp
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ldo.l $r1, 0x00($fp)
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sto.l 0x1c($r0), $r1
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ldo.l $r1, 0x04($fp)
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sto.l 0x20($r0), $r1
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ldo.l $r1, 0x08($fp)
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sto.l 0x24($r0), $r1
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xor $r0, $r0
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ret
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.Lend1:
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.size setjmp,.Lend1-setjmp
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.global longjmp
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.type longjmp,@function
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longjmp:
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ldo.l $r6, 0x00($r0)
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ldo.l $r7, 0x04($r0)
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ldo.l $r8, 0x08($r0)
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ldo.l $r9, 0x0c($r0)
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ldo.l $r10, 0x10($r0)
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ldo.l $sp, 0x14($r0)
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ldo.l $fp, 0x18($r0)
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ldo.l $r2, 0x1c($r0)
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sto.l 0x0($fp), $r2
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ldo.l $r2, 0x20($r0)
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sto.l 0x4($fp), $r2
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ldo.l $r2, 0x24($r0)
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sto.l 0x8($fp), $r2
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ldo.l $r2, 0x08($r0)
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mov $r0, $r1
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xor $r2, $r2
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cmp $r0, $r2
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beq .Lreturn1
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ret
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.Lreturn1:
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inc $r0, 1
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ret
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.Lend2:
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.size longjmp,.Lend2-longjmp
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