/* Copyright (C) 2012 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 "ucontext_i.h" .syntax unified .text /* int getcontext (ucontext_t *ucp) */ ENTRY(__getcontext) /* No need to save r0-r3, d0-d7, or d16-d31. */ add r1, r0, #MCONTEXT_ARM_R4 stmia r1, {r4-r11} /* Save R13 separately as Thumb can't STM it. */ str r13, [r0, #MCONTEXT_ARM_SP] str r14, [r0, #MCONTEXT_ARM_LR] /* Return to LR */ str r14, [r0, #MCONTEXT_ARM_PC] /* Return zero */ mov r2, #0 str r2, [r0, #MCONTEXT_ARM_R0] /* Save ucontext_t * across the next call. */ mov r4, r0 /* __sigprocmask(SIG_BLOCK, NULL, &(ucontext->uc_sigmask)) */ mov r0, #SIG_BLOCK mov r1, #0 add r2, r4, #UCONTEXT_SIGMASK bl PLTJMP(sigprocmask) #if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__ # ifdef __VFP_FP__ /* Store the VFP registers. */ /* Following instruction is fstmiax ip!, {d8-d15}. */ stc p11, cr8, [r0], #64 /* Store the floating-point status register. */ /* Following instruction is fmrx r2, fpscr. */ mrc p10, 7, r1, cr1, cr0, 0 str r1, [r0], #4 # endif #endif #ifdef __IWMMXT__ /* Save the call-preserved iWMMXt registers. */ /* Following instructions are wstrd wr10, [r0], #8 (etc.) */ stcl p1, cr10, [r0], #8 stcl p1, cr11, [r0], #8 stcl p1, cr12, [r0], #8 stcl p1, cr13, [r0], #8 stcl p1, cr14, [r0], #8 stcl p1, cr15, [r0], #8 #endif /* Restore the clobbered R4 and LR. */ ldr r14, [r4, #MCONTEXT_ARM_LR] ldr r4, [r4, #MCONTEXT_ARM_R4] mov r0, #0 DO_RET(r14) END(__getcontext) weak_alias(__getcontext, getcontext)