kvisc/vm/in/stack.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>

//
// Stack manipulation instructions
//

IMPL_START_1(push)
{
    rsp -= 8;
    writemem(ctx, v1, rsp, 8);
}
IMPL_END;

IMPL_START_1(pop)
{
    v1 = readmem(ctx, rsp, 8);
    rsp += 8;
}
IMPL_OUT;

IMPL_START_1(call)
{
    rsp -= 8;
    writemem(ctx, rip, rsp, 8);

    rip = v1;
}
IMPL_END;

IMPL_START_0(ret)
{
    rip = readmem(ctx, rsp, 8);
    rsp += 8;
}
IMPL_END;

IMPL_START_0(enter)
{
    writemem(ctx, rbp, rsp - 8, 8);
    rbp = rsp - 8;
    rsp -= (p1->val + 1) * 8;
}
IMPL_END;

IMPL_START_0(leave)
{
    rsp = rbp + 8;
    rbp = readmem(ctx, rbp, 8);
}
IMPL_END;