ARMTraps.h

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/*
 * Copyright (C) 2020 Niek Linnenbank
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __LIB_LIBARCH_ARM_ARMTRAPS_H
#define __LIB_LIBARCH_ARM_ARMTRAPS_H
 
#include <Types.h>
 
inline ulong trapKernel1(ulong api, ulong arg1)
{
    register unsigned reg0 asm ("r0") = api;
    register unsigned reg1 asm ("r1") = arg1;
 
    asm volatile ("swi #0\n"
                : "+r"(reg0)
                : "r"(reg0), "r"(reg1)
                : "memory");
    return reg0;
}
 
inline ulong trapKernel2(ulong api, ulong arg1, ulong arg2)
{
    register unsigned reg0 asm ("r0") = api;
    register unsigned reg1 asm ("r1") = arg1;
    register unsigned reg2 asm ("r2") = arg2;
 
    asm volatile ("swi #0\n"
                : "+r"(reg0)
                : "r"(reg0), "r"(reg1), "r"(reg2)
                : "memory");
    return reg0;
}
 
inline ulong trapKernel3(ulong api, ulong arg1, ulong arg2, ulong arg3)
{
    register unsigned reg0 asm ("r0") = api;
    register unsigned reg1 asm ("r1") = arg1;
    register unsigned reg2 asm ("r2") = arg2;
    register unsigned reg3 asm ("r3") = arg3;
 
    asm volatile ("swi #0\n"
                : "+r"(reg0)
                : "r"(reg0), "r"(reg1), "r"(reg2), "r"(reg3)
                : "memory");
    return reg0;
}
 
inline ulong trapKernel4(ulong api, ulong arg1, ulong arg2, ulong arg3,
                         ulong arg4)
{
    register unsigned reg0 asm ("r0") = api;
    register unsigned reg1 asm ("r1") = arg1;
    register unsigned reg2 asm ("r2") = arg2;
    register unsigned reg3 asm ("r3") = arg3;
    register unsigned reg4 asm ("r4") = arg4;
 
    asm volatile ("swi #0\n"
                : "+r"(reg0)
                : "r"(reg0), "r"(reg1), "r"(reg2), "r"(reg3), "r"(reg4)
                : "memory");
    return reg0;
}
 
inline ulong trapKernel5(ulong api, ulong arg1, ulong arg2, ulong arg3,
                         ulong arg4, ulong arg5)
{
    register unsigned reg0 asm ("r0") = api;
    register unsigned reg1 asm ("r1") = arg1;
    register unsigned reg2 asm ("r2") = arg2;
    register unsigned reg3 asm ("r3") = arg3;
    register unsigned reg4 asm ("r4") = arg4;
    register unsigned reg5 asm ("r5") = arg5;
 
    asm volatile ("swi #0\n"
                : "+r"(reg0)
                : "r"(reg0), "r"(reg1), "r"(reg2), "r"(reg3), "r"(reg4), "r"(reg5)
                : "memory");
    return reg0;
}
 
#endif /* __LIB_LIBARCH_ARM_ARMTRAPS_H */