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Diffstat (limited to 'sysdeps/sparc/sparc32/__longjmp.S')
| -rw-r--r-- | sysdeps/sparc/sparc32/__longjmp.S | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/sysdeps/sparc/sparc32/__longjmp.S b/sysdeps/sparc/sparc32/__longjmp.S deleted file mode 100644 index 2cfb6c23e7..0000000000 --- a/sysdeps/sparc/sparc32/__longjmp.S +++ /dev/null @@ -1,93 +0,0 @@ -/* Copyright (C) 1991-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -#include <jmpbuf-offsets.h> -#define ENV(base,reg) [%base + (reg * 4)] -#define ST_FLUSH_WINDOWS 3 - -ENTRY(__longjmp) - /* Store our arguments in global registers so we can still - use them while unwinding frames and their register windows. */ - - ld ENV(o0,JB_FP), %g3 /* Cache target FP in register %g3. */ -#ifdef PTR_DEMANGLE - PTR_DEMANGLE (%g3, %g3, %g4) -#endif - mov %o0, %g1 /* ENV in %g1 */ - orcc %o1, %g0, %g2 /* VAL in %g2 */ - be,a 0f /* Branch if zero; else skip delay slot. */ - mov 1, %g2 /* Delay slot only hit if zero: VAL = 1. */ -0: - xor %fp, %g3, %o0 - add %fp, 512, %o1 - andncc %o0, 4095, %o0 - bne LOC(thread) - cmp %o1, %g3 - bl LOC(thread) - - /* Now we will loop, unwinding the register windows up the stack - until the restored %fp value matches the target value in %g3. */ - -LOC(loop): - cmp %fp, %g3 /* Have we reached the target frame? */ - bl,a LOC(loop) /* Loop while current fp is below target. */ - restore /* Unwind register window in delay slot. */ - be,a LOC(found) /* Better have hit it exactly. */ - ld ENV(g1,JB_SP), %o0 /* Delay slot: extract target SP. */ - -LOC(thread): - save %sp, -96, %sp - /* - * Do a "flush register windows trap". The trap handler in the - * kernel writes all the register windows to their stack slots, and - * marks them all as invalid (needing to be sucked up from the - * stack when used). This ensures that all information needed to - * unwind to these callers is in memory, not in the register - * windows. - */ - ta ST_FLUSH_WINDOWS -#ifdef PTR_DEMANGLE - ld ENV(g1,JB_PC), %g5 /* Set return PC. */ - ld ENV(g1,JB_SP), %g1 /* Set saved SP on restore below. */ - PTR_DEMANGLE2 (%i7, %g5, %g4) - PTR_DEMANGLE2 (%fp, %g1, %g4) -#else - ld ENV(g1,JB_PC), %i7 /* Set return PC. */ - ld ENV(g1,JB_SP), %fp /* Set saved SP on restore below. */ -#endif - jmp %i7 + 8 - restore %g2, 0, %o0 /* Restore values from above register frame. */ - -LOC(found): - /* We have unwound register windows so %fp matches the target. */ -#ifdef PTR_DEMANGLE - PTR_DEMANGLE2 (%sp, %o0, %g4) -#else - mov %o0, %sp /* OK, install new SP. */ -#endif - -LOC(sp_ok): - ld ENV(g1,JB_PC), %o0 /* Extract target return PC. */ -#ifdef PTR_DEMANGLE - PTR_DEMANGLE2 (%o0, %o0, %g4) -#endif - jmp %o0 + 8 /* Return there. */ - mov %g2, %o0 /* Delay slot: set return value. */ - -END(__longjmp) |