/* Set current context. Copyright (C) 2015 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 . */ #include #include "ucontext_i.h" /* int setcontext (const ucontext_t *ucp) */ .text ENTRY(__setcontext) ldw r5, UCONTEXT_FLAGS(r4) movi r6, 1 bne r5, r6, .Lsigreturn mov r10, r4 /* Restore signal mask. */ /* rt_sigprocmask (SIG_SETMASK, NULL, &ucp->uc_sigmask, _NSIG8) */ movi r7, _NSIG8 addi r6, r4, UCONTEXT_SIGMASK mov r5, zero movi r4, SIG_SETMASK movi r2, SYS_ify (rt_sigprocmask) trap bne r7, zero, SYSCALL_ERROR_LABEL /* Restore argument registers, for the makecontext() case. */ ldw r4, (UCONTEXT_MCONTEXT + 4*4)(r10) ldw r5, (UCONTEXT_MCONTEXT + 5*4)(r10) ldw r6, (UCONTEXT_MCONTEXT + 6*4)(r10) ldw r7, (UCONTEXT_MCONTEXT + 7*4)(r10) ldw r16, (UCONTEXT_MCONTEXT + 16*4)(r10) ldw r17, (UCONTEXT_MCONTEXT + 17*4)(r10) ldw r18, (UCONTEXT_MCONTEXT + 18*4)(r10) ldw r19, (UCONTEXT_MCONTEXT + 19*4)(r10) ldw r20, (UCONTEXT_MCONTEXT + 20*4)(r10) ldw r21, (UCONTEXT_MCONTEXT + 21*4)(r10) ldw r22, (UCONTEXT_MCONTEXT + 22*4)(r10) ldw ra, (UCONTEXT_MCONTEXT + 24*4)(r10) ldw fp, (UCONTEXT_MCONTEXT + 25*4)(r10) ldw gp, (UCONTEXT_MCONTEXT + 26*4)(r10) /* Load address to continue execution. */ ldw r3, (UCONTEXT_MCONTEXT + 28*4)(r10) ldw sp, (UCONTEXT_MCONTEXT + 29*4)(r10) mov r2, zero jmp r3 .Lsigreturn: addi sp, sp, -RT_SIGFRAME_SIZE cfi_adjust_cfa_offset (RT_SIGFRAME_SIZE) addi r2, sp, RT_SIGFRAME_UCONTEXT movi r3, UCONTEXT_SIZE-4 1: add r6, r4, r3 ldw r5, 0(r6) add r7, r2, r3 addi r3, r3, -4 stw r5, 0(r7) bgt r3, zero, 1b movi r2, SYS_ify (rt_sigreturn) trap addi sp, sp, RT_SIGFRAME_SIZE cfi_adjust_cfa_offset (-RT_SIGFRAME_SIZE) br SYSCALL_ERROR_LABEL PSEUDO_END (__setcontext) weak_alias (__setcontext, setcontext) ENTRY(__startcontext) mov r4, r16 bne r4, zero, __setcontext /* If uc_link == zero, call _exit. */ #ifdef PIC nextpc r22 1: movhi r8, %hiadj(_gp_got - 1b) addi r8, r8, %lo(_gp_got - 1b) add r22, r22, r8 ldw r8, %call(HIDDEN_JUMPTARGET(_exit))(r22) jmp r8 #else jmpi _exit #endif END(__startcontext)