/* $NetBSD: __setjmp14.S,v 1.9 2021/07/06 12:38:40 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <machine/asm.h>
#include "assym.h"
/*
* C library -- setjmp, longjmp
*
* longjmp(a,v)
* will generate a "return(v)" from
* the last call to
* setjmp(a)
* by restoring registers from the stack,
* and the previous signal state.
*/
.set noreorder
LEAF(__setjmp14, 1)
LDGP(pv)
stq ra, SC_PC(a0) /* sc_pc = return address */
stq s0, (SC_REGS+_REG_S0*8)(a0) /* saved bits of sc_regs */
stq s1, (SC_REGS+_REG_S1*8)(a0)
stq s2, (SC_REGS+_REG_S2*8)(a0)
stq s3, (SC_REGS+_REG_S3*8)(a0)
stq s4, (SC_REGS+_REG_S4*8)(a0)
stq s5, (SC_REGS+_REG_S5*8)(a0)
stq s6, (SC_REGS+_REG_S6*8)(a0)
stq ra, (SC_REGS+_REG_RA*8)(a0)
stq sp, (SC_REGS+_REG_SP*8)(a0)
stq gp, (SC_REGS+_REG_GP*8)(a0)
/*
* get signal information
*/
mov a0, s0 /* squirrel away ptr to sc */
/* see what's blocked */
mov zero, a0 /* how (insignificant) */
mov zero, a1 /* set (NULL) */
lda a2, SC_MASK(s0) /* point to mask in sc */
CALL(__sigprocmask14)
lda sp, -32(sp) /* roundup(sizeof(struct sigaltstack), 16) */
mov zero, a0
mov sp, a1
CALL(__sigaltstack14)
ldl t0, 16(sp) /* offset of ss_flags */
lda sp, 32(sp) /* pop the sigaltstack */
ldq ra, (SC_REGS+_REG_RA*8)(s0) /* restore return address */
blt v0, botch /* check for error */
and t0, 0x1, t0 /* get SA_ONSTACK flag */
stq t0, SC_ONSTACK(s0) /* and save it in sc_onstack */
/*
* Restore old s0 and a0, and continue saving registers
*/
mov s0, a0
ldq s0, (SC_REGS+_REG_S0*8)(a0)
ldq t0, magic /* sigcontext magic number */
stq t0, (SC_REGS+_REG_UNIQUE*8)(a0) /* magic in sc_regs[31] */
/* Too bad we can't check if we actually used FP */
ldiq t0, 1
stq t0, SC_OWNEDFP(a0) /* say we've used FP. */
stt fs0, (2*8 + SC_FPREGS)(a0) /* saved bits of sc_fpregs */
stt fs1, (3*8 + SC_FPREGS)(a0)
stt fs2, (4*8 + SC_FPREGS)(a0)
stt fs3, (5*8 + SC_FPREGS)(a0)
stt fs4, (6*8 + SC_FPREGS)(a0)
stt fs5, (7*8 + SC_FPREGS)(a0)
stt fs6, (8*8 + SC_FPREGS)(a0)
stt fs7, (9*8 + SC_FPREGS)(a0)
excb /* required 4.7.8.1 Alpha ARM */
mf_fpcr ft0 /* get FP control reg */
excb /* required 4.7.8.1 Alpha ARM */
stt ft0, SC_FPCR(a0) /* and store it in sc_fpcr */
stq zero, SC_FP_CONTROL(a0) /* FP software control XXX */
stq zero, (SC_RESERVED + 0*8)(a0) /* sc_reserved[0] */
stq zero, (SC_RESERVED + 1*8)(a0) /* sc_reserved[1] */
stq zero, (SC_XXX + 0*8)(a0) /* sc_xxx[0] */
stq zero, (SC_XXX + 1*8)(a0) /* sc_xxx[1] */
stq zero, (SC_XXX + 2*8)(a0) /* sc_xxx[2] */
stq zero, (SC_XXX + 3*8)(a0) /* sc_xxx[3] */
stq zero, (SC_XXX + 4*8)(a0) /* sc_xxx[4] */
stq zero, (SC_XXX + 5*8)(a0) /* sc_xxx[5] */
stq zero, (SC_XXX + 6*8)(a0) /* sc_xxx[6] */
stq zero, (SC_XXX + 7*8)(a0) /* sc_xxx[7] */
mov zero, v0 /* return zero */
RET
botch:
CALL(abort)
RET /* "can't" get here... */
magic:
.quad 0xacedbade /* sigcontext magic number */
END(__setjmp14)