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kvisc/vm/in/stack.c
2019-06-05 12:53:09 +02:00

81 lines
1.0 KiB
C

// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include <in/instrs.h>
IMPL_COND(push);
IMPL_COND(pop);
IMPL_COND(call);
IMPL_COND(ret);
IMPL_COND(leave);
//
// Stack manipulation instructions
//
IMPL_START_1(push)
{
CHK_STACK(<);
PUSH(v1);
}
IMPL_END;
IMPL_START_1(pop)
{
CHK_STACK(<=);
POP(v1);
}
IMPL_OUT;
IMPL_START_1(call)
{
CHK_STACK(<);
PUSH(rip);
JUMP(v1);
}
IMPL_END;
IMPL_START_0(ret)
{
CHK_STACK(<=);
POP(rip);
}
IMPL_END;
IMPL_START_0(enter)
{
// We don't CHK_STACK(<) here because ENTER
// (should) always be preceded by a CALL,
// which already checks the stack
PUSH(rbp);
rbp = rsp;
}
IMPL_END;
IMPL_START_0(leave)
{
// Do NOT check stack here
// (it would always fail)
POP(rbp);
}
IMPL_END;
IMPL_START_0(pushf)
{
CHK_STACK(<);
PUSH(flg);
}
IMPL_END;
IMPL_START_0(popf)
{
CHK_STACK(<=);
// XXX
CHK_SUPERV();
POP(flg);
}
IMPL_END;