/* longjmp for ARM. Copyright (C) 1997, 1998 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 <features.h> #include <bits/arm_asm.h> #include <bits/arm_bx.h> .global __longjmp .type __longjmp,%function .align 2 #if defined(THUMB1_ONLY) .thumb_func __longjmp: mov r2, r0 movs r0, r1 /* can't let setjmp() return zero! */ bne 1f mov r0, #1 1: mov r1, r2 /* Restore registers, shuffling them through low regs. */ add r2, #(4 * 4) ldmia r2!, {r4, r5, r6, r7} mov r8, r4 mov r9, r5 mov sl, r6 mov fp, r7 ldmia r2!, {r4, r5} mov sp, r4 mov lr, r5 ldmia r1!, {r4, r5, r6, r7} bx lr #else __longjmp: mov ip, r0 /* save jmp_buf pointer */ movs r0, r1 /* get the return value in place */ IT(t, eq) moveq r0, #1 /* can't let setjmp() return zero! */ #if defined(__thumb2__) /* Thumb-2 does not allow loading sp with ldm. */ ldmia ip!, {v1-v6, sl, fp} ldr sp, [ip], #4 ldr lr, [ip], #4 #else ldmia ip!, {v1-v6, sl, fp, sp, lr} #endif #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__ #ifdef __VFP_FP__ /* Restore the VFP registers. */ /* Following instruction is fldmiax ip!, {d8-d15}. */ ldc p11, cr8, [r12], #68 /* Restore the floating-point status register. */ ldr r1, [ip], #4 /* Following instruction is fmxr fpscr, r1. */ mcr p10, 7, r1, cr1, cr0, 0 # elif defined __MAVERICK__ cfldrd mvd4, [ip], #8 ; nop cfldrd mvd5, [ip], #8 ; nop cfldrd mvd6, [ip], #8 ; nop cfldrd mvd7, [ip], #8 ; nop cfldrd mvd8, [ip], #8 ; nop cfldrd mvd9, [ip], #8 ; nop cfldrd mvd10, [ip], #8 ; nop cfldrd mvd11, [ip], #8 ; nop cfldrd mvd12, [ip], #8 ; nop cfldrd mvd13, [ip], #8 ; nop cfldrd mvd14, [ip], #8 ; nop cfldrd mvd15, [ip], #8 # else lfmfd f4, 4, [ip] ! /* load the floating point regs */ # endif #endif #ifdef __IWMMXT__ /* Restore the call-preserved iWMMXt registers. */ /* Following instructions are wldrd wr10, [ip], #8 (etc.) */ ldcl p1, cr10, [r12], #8 ldcl p1, cr11, [r12], #8 ldcl p1, cr12, [r12], #8 ldcl p1, cr13, [r12], #8 ldcl p1, cr14, [r12], #8 ldcl p1, cr15, [r12], #8 #endif BX(lr) #endif .size __longjmp,.-__longjmp libc_hidden_def(__longjmp)