1/* $NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $ */ |
2 3/*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * --- 18 unchanged lines hidden (view full) --- 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <machine/asm.h> |
36__FBSDID("$FreeBSD: head/lib/libc/mips/gen/_setjmp.S 209231 2010-06-16 12:55:14Z jchandra $"); |
37#include <machine/regnum.h> 38 |
39#include "SYS.h" 40 |
41#if defined(LIBC_SCCS) && !defined(lint) |
42#if 0 43 RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") 44#else 45 RCSID("$NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $") 46#endif |
47#endif /* LIBC_SCCS and not lint */ 48 |
49/* 50 * C library -- _setjmp, _longjmp 51 * 52 * _longjmp(a,v) 53 * will generate a "return(v)" from 54 * the last call to 55 * _setjmp(a) 56 * by restoring registers from the stack, 57 * The previous signal state is NOT restored. 58 */ 59 |
60 .set noreorder |
61 62LEAF(_setjmp) |
63 REG_PROLOGUE 64 REG_LI v0, _JB_MAGIC__SETJMP 65 REG_S v0, (_JB_MAGIC * SZREG)(a0) 66 REG_S ra, (_JB_REG_RA * SZREG)(a0) 67 REG_S s0, (_JB_REG_S0 * SZREG)(a0) 68 REG_S s1, (_JB_REG_S1 * SZREG)(a0) 69 REG_S s2, (_JB_REG_S2 * SZREG)(a0) 70 REG_S s3, (_JB_REG_S3 * SZREG)(a0) 71 REG_S s4, (_JB_REG_S4 * SZREG)(a0) 72 REG_S s5, (_JB_REG_S5 * SZREG)(a0) 73 REG_S s6, (_JB_REG_S6 * SZREG)(a0) 74 REG_S s7, (_JB_REG_S7 * SZREG)(a0) 75 REG_S s8, (_JB_REG_S8 * SZREG)(a0) 76#if defined(__mips_n32) || defined(__mips_n64) 77 REG_S gp, (_JB_REG_GP * SZREG)(a0) # newabi gp is callee-saved |
78#endif |
79 REG_S sp, (_JB_REG_SP * SZREG)(a0) 80 REG_EPILOGUE 81 |
82 j ra 83 move v0, zero 84END(_setjmp) 85 86LEAF(_longjmp) |
87 PIC_PROLOGUE(_longjmp) 88 PTR_SUBU sp, sp, CALLFRAME_SIZ 89 SAVE_GP(CALLFRAME_GP) |
90 |
91 REG_PROLOGUE 92 REG_L v0, (_JB_MAGIC * SZREG)(a0) # get magic number 93 REG_L ra, (_JB_REG_RA * SZREG)(a0) 94 REG_LI t0, _JB_MAGIC__SETJMP 95 bne v0, t0, botch # jump if error 96 PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity 97 REG_L s0, (_JB_REG_S0 * SZREG)(a0) 98 REG_L s1, (_JB_REG_S1 * SZREG)(a0) 99 REG_L s2, (_JB_REG_S2 * SZREG)(a0) 100 REG_L s3, (_JB_REG_S3 * SZREG)(a0) 101 REG_L s4, (_JB_REG_S4 * SZREG)(a0) 102 REG_L s5, (_JB_REG_S5 * SZREG)(a0) 103 REG_L s6, (_JB_REG_S6 * SZREG)(a0) 104 REG_L s7, (_JB_REG_S7 * SZREG)(a0) 105#if defined(__mips_n32) || defined(__mips_n64) 106 REG_L gp, (_JB_REG_GP * SZREG)(a0) 107#endif 108 REG_L sp, (_JB_REG_SP * SZREG)(a0) 109 REG_L s8, (_JB_REG_S8 * SZREG)(a0) 110 111 REG_EPILOGUE 112 move v0, a1 # get return value in 1st arg |
113 j ra |
114 nop |
115 116botch: |
117 /* 118 * We know we aren't returning so we don't care about restoring 119 * our caller's GP. 120 */ 121 PTR_LA t9, _C_LABEL(longjmperror) 122 jalr t9 |
123 nop |
124 125 PIC_TAILCALL(abort) |
126END(_longjmp) |