lib: Linux riscv64-mes-gcc support.
* lib/linux/riscv64-mes-gcc/_exit.c, lib/linux/riscv64-mes-gcc/_write.c, lib/linux/riscv64-mes-gcc/crt1.c, lib/linux/riscv64-mes-gcc/syscall-internal.c, lib/linux/riscv64-mes-gcc/syscall.c: New files to make it possible to compile mes for riscv64-mes-gcc.
This commit is contained in:
W. J. van der Laan
Janneke Nieuwenhuizen
parent
8af58676b9
commit
32d7171835
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "mes/lib-mini.h"
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#define SYS_exit 93
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// *INDENT-OFF*
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void
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_exit (int code)
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{
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register long __a7 asm ("a7") = SYS_exit;
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register long __a0 asm ("a0") = code;
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asm volatile (
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"ecall\n\t"
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: // no outputs
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: "r" (__a0), "r" (__a7)
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);
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// not reached
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_exit (0);
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}
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@ -0,0 +1,40 @@
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "mes/lib-mini.h"
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#define SYS_write 64
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// *INDENT-OFF*
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ssize_t
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_write (int filedes, void const *buffer, size_t size)
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{
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register long __a7 asm ("a7") = (long) SYS_write;
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register long __a0 asm ("a0") = (long) filedes;
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register long __a1 asm ("a1") = (long) buffer;
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register long __a2 asm ("a2") = (long) size;
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asm volatile (
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"ecall\n\t"
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: "+r" (__a0)
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: "r" (__a7), "r" (__a1), "r" (__a2)
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);
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return (ssize_t)__a0;
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}
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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* Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.org>
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mes/lib-mini.h>
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//int main (int argc, char *argv[], char *envp[]);
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/* gcc will generate the following preamble:
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addi sp,sp,-16
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sd s0,8(sp)
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addi s0,sp,16
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*/
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// *INDENT-OFF*
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void
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_start ()
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{
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asm (
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".option push\n\t"
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".option norelax\n\t"
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"lla gp, __global_pointer$\n\t"
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".option pop\n\t"
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"andi sp, sp, ~15\n\t" // make sure sp conforms to ABI alignment
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);
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asm (
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"li t0, 0\n\t"
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"mv %0, t0\n"
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: "=r" (__stdin)
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: //no inputs ""
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);
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asm (
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"li t0, 1\n\t"
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"mv %0, t0\n"
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: "=r" (__stdout)
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: //no inputs ""
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);
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asm (
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"li t0, 2\n\t"
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"mv %0, t0\n"
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: "=r" (__stderr)
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: //no inputs ""
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);
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// environ is &argv[argc + 1]
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asm (
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"lw t0, 0(s0)\n\t"
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"addi t1, s0, 8\n\t"
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"addi t0, t0, 1\n\t"
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"slli t0, t0, 3\n\t"
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"add %0, t1, t0\n\t"
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: "=r" (environ)
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: //no inputs ""
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);
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asm (
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"lw a0, 0(s0)\n\t" // a0 argc
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"addi a1, s0, 8\n\t" // a1 argv
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"mv a2, %0\n\t" // a2 envp
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"jal main\n\t"
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"li a7, 93\n\t" // SYS_exit
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"ecall\n\t" // exit(return value from main)
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"ebreak\n\t"
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: //no outputs ""
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: "r" (environ)
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);
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}
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@ -0,0 +1,62 @@
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/riscv64/syscall.h>
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// *INDENT-OFF*
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static long
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__sys_call_internal (long sys_call)
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{
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register long __a7 asm ("a7") = sys_call;
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register long __a0 asm ("a0");
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asm volatile (
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"ecall\n\t"
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: "=r" (__a0)
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: "r" (__a7)
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);
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return __a0;
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}
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static long
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__sys_call2_internal (long sys_call, long one, long two)
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{
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register long __a7 asm ("a7") = sys_call;
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register long __a0 asm ("a0") = one;
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register long __a1 asm ("a1") = two;
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asm volatile (
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"ecall\n\t"
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: "+r" (__a0)
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: "r" (__a7), "r" (__a1)
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);
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return __a0;
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}
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// *INDENT-ON*
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/* Returns < 0 on error (errno-like value from kernel), or 0 on success */
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int
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__raise (int signum)
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{
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long pid = __sys_call_internal (SYS_getpid);
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if (pid < 0)
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return pid;
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else
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return __sys_call2_internal (SYS_kill, pid, signum);
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}
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@ -0,0 +1,166 @@
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <linux/riscv64/syscall.h>
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// *INDENT-OFF*
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long
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__sys_call (long sys_call)
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{
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register long __a7 asm ("a7") = sys_call;
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register long __a0 asm ("a0");
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asm volatile (
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"ecall\n\t"
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: "=r" (__a0)
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: "r" (__a7)
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);
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return __a0;
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}
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long
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__sys_call1 (long sys_call, long one)
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{
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register long __a7 asm ("a7") = sys_call;
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register long __a0 asm ("a0") = one;
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asm volatile (
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"ecall\n\t"
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: "+r" (__a0)
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: "r" (__a7)
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);
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return __a0;
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}
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long
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__sys_call2 (long sys_call, long one, long two)
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{
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register long __a7 asm ("a7") = sys_call;
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register long __a0 asm ("a0") = one;
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register long __a1 asm ("a1") = two;
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asm volatile (
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"ecall\n\t"
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: "+r" (__a0)
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: "r" (__a7), "r" (__a1)
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);
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return __a0;
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}
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long
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__sys_call3 (long sys_call, long one, long two, long three)
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{
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register long __a7 asm ("a7") = sys_call;
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register long __a0 asm ("a0") = one;
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register long __a1 asm ("a1") = two;
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register long __a2 asm ("a2") = three;
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asm volatile (
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"ecall\n\t"
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: "+r" (__a0)
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: "r" (__a7), "r" (__a1), "r" (__a2)
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);
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return __a0;
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}
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long
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__sys_call4 (long sys_call, long one, long two, long three, long four)
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{
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register long __a7 asm ("a7") = sys_call;
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register long __a0 asm ("a0") = one;
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register long __a1 asm ("a1") = two;
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register long __a2 asm ("a2") = three;
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register long __a3 asm ("a3") = four;
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asm volatile (
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"ecall\n\t"
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: "+r" (__a0)
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: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3)
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);
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return __a0;
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}
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// *INDENT-ON*
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long
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_sys_call (long sys_call)
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{
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long r = __sys_call (sys_call);
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if (r < 0)
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{
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errno = -r;
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r = -1;
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}
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else
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errno = 0;
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return r;
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}
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long
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_sys_call1 (long sys_call, long one)
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{
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long r = __sys_call1 (sys_call, one);
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if (r < 0)
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{
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errno = -r;
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r = -1;
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}
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else
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errno = 0;
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return r;
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}
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long
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_sys_call2 (long sys_call, long one, long two)
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{
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long r = __sys_call2 (sys_call, one, two);
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if (r < 0)
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{
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errno = -r;
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r = -1;
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}
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else
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errno = 0;
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return r;
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}
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long
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_sys_call3 (long sys_call, long one, long two, long three)
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{
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long r = __sys_call3 (sys_call, one, two, three);
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if (r < 0)
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{
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errno = -r;
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r = -1;
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}
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else
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errno = 0;
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return r;
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}
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long
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_sys_call4 (long sys_call, long one, long two, long three, long four)
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{
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long r = __sys_call4 (sys_call, one, two, three, four);
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if (r < 0)
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{
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errno = -r;
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r = -1;
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}
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else
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errno = 0;
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return r;
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}
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