90 lines
2.0 KiB
ArmAsm
90 lines
2.0 KiB
ArmAsm
.global __setjmp
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.global _setjmp
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.global setjmp
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.type __setjmp,@function
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.type _setjmp,@function
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.type setjmp,@function
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__setjmp:
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_setjmp:
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setjmp:
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ld 5, 24(1) # load from the TOC slot in the caller's stack frame
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b __setjmp_toc
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.localentry __setjmp,.-__setjmp
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.localentry _setjmp,.-_setjmp
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.localentry setjmp,.-setjmp
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mr 5, 2
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.global __setjmp_toc
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.hidden __setjmp_toc
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# same as normal setjmp, except TOC pointer to save is provided in r5.
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# r4 would normally be the 2nd parameter, but we're using r5 to simplify calling from sigsetjmp.
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# solves the problem of knowing whether to save the TOC pointer from r2 or the caller's stack frame.
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__setjmp_toc:
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# 0) store IP into 0, then into the jmpbuf pointed to by r3 (first arg)
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mflr 0
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std 0, 0*8(3)
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# 1) store cr
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mfcr 0
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std 0, 1*8(3)
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# 2) store SP and TOC
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std 1, 2*8(3)
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std 5, 3*8(3)
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# 3) store r14-31
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std 14, 4*8(3)
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std 15, 5*8(3)
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std 16, 6*8(3)
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std 17, 7*8(3)
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std 18, 8*8(3)
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std 19, 9*8(3)
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std 20, 10*8(3)
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std 21, 11*8(3)
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std 22, 12*8(3)
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std 23, 13*8(3)
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std 24, 14*8(3)
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std 25, 15*8(3)
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std 26, 16*8(3)
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std 27, 17*8(3)
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std 28, 18*8(3)
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std 29, 19*8(3)
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std 30, 20*8(3)
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std 31, 21*8(3)
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# 4) store floating point registers f14-f31
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stfd 14, 22*8(3)
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stfd 15, 23*8(3)
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stfd 16, 24*8(3)
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stfd 17, 25*8(3)
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stfd 18, 26*8(3)
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stfd 19, 27*8(3)
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stfd 20, 28*8(3)
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stfd 21, 29*8(3)
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stfd 22, 30*8(3)
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stfd 23, 31*8(3)
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stfd 24, 32*8(3)
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stfd 25, 33*8(3)
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stfd 26, 34*8(3)
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stfd 27, 35*8(3)
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stfd 28, 36*8(3)
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stfd 29, 37*8(3)
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stfd 30, 38*8(3)
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stfd 31, 39*8(3)
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# 5) store vector registers v20-v31
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addi 3, 3, 40*8
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stvx 20, 0, 3 ; addi 3, 3, 16
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stvx 21, 0, 3 ; addi 3, 3, 16
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stvx 22, 0, 3 ; addi 3, 3, 16
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stvx 23, 0, 3 ; addi 3, 3, 16
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stvx 24, 0, 3 ; addi 3, 3, 16
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stvx 25, 0, 3 ; addi 3, 3, 16
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stvx 26, 0, 3 ; addi 3, 3, 16
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stvx 27, 0, 3 ; addi 3, 3, 16
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stvx 28, 0, 3 ; addi 3, 3, 16
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stvx 29, 0, 3 ; addi 3, 3, 16
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stvx 30, 0, 3 ; addi 3, 3, 16
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stvx 31, 0, 3
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# 6) return 0
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li 3, 0
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blr
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