30 lines
794 B
C
30 lines
794 B
C
// Copyright (c) 2011-2016 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <string.h>
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#include "context.h"
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void
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makecontext(uctx *ucp, void (*func)(void), intptr_t arg)
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{
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long *sp;
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memset(&ucp->uc_mcontext, 0, sizeof ucp->uc_mcontext);
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ucp->uc_mcontext.mc_rdi = (long)arg;
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sp = (long*)ucp->uc_stack.ss_sp+ucp->uc_stack.ss_size/sizeof(long);
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sp -= 1;
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sp = (void*)((uintptr_t)sp - (uintptr_t)sp%16); /* 16-align for OS X */
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*--sp = 0; /* return address */
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ucp->uc_mcontext.mc_rip = (long)func;
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ucp->uc_mcontext.mc_rsp = (long)sp;
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}
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int
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swapcontext(uctx *oucp, const uctx *ucp)
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{
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if(getcontext(oucp) == 0)
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setcontext(ucp);
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return 0;
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}
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