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