/* Copyright (C) 1992, 1995, 1997, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Brendan Kehoe (brendan@zen.org). 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <features.h> #include <setjmp.h> #include <stdlib.h> #undef __longjmp libc_hidden_proto(__longjmp) #ifndef __GNUC__ #error This file uses GNU C extensions; you must compile with GCC. #endif void __longjmp (__jmp_buf env, int val_arg) { /* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before the hack around it); force it to use $a1 for the longjmp value. Without this it saves $a1 in a register which gets clobbered along the way. */ register int val asm ("a1"); /* Pull back the floating point callee-saved registers. */ #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__ asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0])); asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1])); asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2])); asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3])); asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4])); asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5])); /* Get and reconstruct the floating point csr. */ asm volatile ("lw $2, %0" : : "m" (env[0].__fpc_csr)); asm volatile ("ctc1 $2, $31"); #endif /* Get the GP. */ asm volatile ("lw $gp, %0" : : "m" (env[0].__gp)); /* Get the callee-saved registers. */ asm volatile ("lw $16, %0" : : "m" (env[0].__regs[0])); asm volatile ("lw $17, %0" : : "m" (env[0].__regs[1])); asm volatile ("lw $18, %0" : : "m" (env[0].__regs[2])); asm volatile ("lw $19, %0" : : "m" (env[0].__regs[3])); asm volatile ("lw $20, %0" : : "m" (env[0].__regs[4])); asm volatile ("lw $21, %0" : : "m" (env[0].__regs[5])); asm volatile ("lw $22, %0" : : "m" (env[0].__regs[6])); asm volatile ("lw $23, %0" : : "m" (env[0].__regs[7])); /* Get the PC. */ asm volatile ("lw $25, %0" : : "m" (env[0].__pc)); /* Restore the stack pointer and the FP. They have to be restored last and in a single asm as gcc, depending on options used, may use either of them to access env. */ asm volatile ("lw $29, %0\n\t" "lw $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp)); /* Give setjmp 1 if given a 0, or what they gave us if non-zero. */ if (val == 0) asm volatile ("li $2, 1"); else asm volatile ("move $2, %0" : : "r" (val)); asm volatile ("jr $25"); /* Avoid `volatile function does return' warnings. */ for (;;); } libc_hidden_def(__longjmp)