riscv64: add support for tcc
Adapted from -gcc but make assembly match tcc style assembly where the offsets are received as an extra input argument: sw a0, 9(t0) Becomes: sw a0, t0, 9 * lib/linux/riscv64-mes-tcc/_exit.c, lib/linux/riscv64-mes-tcc/_write.c, lib/linux/riscv64-mes-tcc/crt1.c, lib/linux/riscv64-mes-tcc/exit-42.S, lib/linux/riscv64-mes-tcc/hello-mes.S, lib/linux/riscv64-mes-tcc/syscall-internal.c, lib/linux/riscv64-mes-tcc/syscall.c: New files.
This commit is contained in:
Ekaitz Zarraga
Janneke Nieuwenhuizen
parent
47cffc5d2a
commit
10054b2f17
40
lib/linux/riscv64-mes-tcc/_exit.c
Normal file
40
lib/linux/riscv64-mes-tcc/_exit.c
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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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* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
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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
|
||||
* 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.
|
||||
*
|
||||
* GNU Mes 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 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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41
lib/linux/riscv64-mes-tcc/_write.c
Normal file
41
lib/linux/riscv64-mes-tcc/_write.c
Normal file
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@ -0,0 +1,41 @@
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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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* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
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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
|
||||
* 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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58
lib/linux/riscv64-mes-tcc/crt1.c
Normal file
58
lib/linux/riscv64-mes-tcc/crt1.c
Normal file
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@ -0,0 +1,58 @@
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018,2019,2020,2023 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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* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
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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
|
||||
* 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
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* 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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// *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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"lla gp, __global_pointer$\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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// environ is &argv[argc + 1]
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asm (
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"lw t0, s0, 0\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 t0, t1, t0\n\t"
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"lw a0, s0, 0\n\t" // a0 argc
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"addi a1, s0, 8\n\t" // a1 argv
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"mv a2, t0\n\t" // a2 envp
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"jal ra, __init_io\n\t"
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"jal ra, 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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32
lib/linux/riscv64-mes-tcc/exit-42.S
Normal file
32
lib/linux/riscv64-mes-tcc/exit-42.S
Normal file
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@ -0,0 +1,32 @@
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/*
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
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* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
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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
|
||||
* 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.
|
||||
*
|
||||
* GNU Mes 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** Code: */
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SYS_exit = 93 /* Linux syscalls. */
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.globl _start /* Magic linker symbol: --entry-address. */
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.text /* Program text. */
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_start:
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li a7, SYS_exit /* System call function: exit, in a7. */
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li a0, 42 /* 1st parameter: exit status, in a0. */
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ecall /* Call system. */
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wfi /* Should not be reached. */
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46
lib/linux/riscv64-mes-tcc/hello-mes.S
Normal file
46
lib/linux/riscv64-mes-tcc/hello-mes.S
Normal file
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@ -0,0 +1,46 @@
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/*
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
|
||||
* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
|
||||
*
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||||
* This file is part of GNU Mes.
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||||
*
|
||||
* GNU Mes 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.
|
||||
*
|
||||
* GNU Mes 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.
|
||||
*
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||||
* You should have received a copy of the GNU General Public License
|
||||
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** Code: */
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SYS_exit = 93 /* Linux syscalls. */
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SYS_write = 64
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stdout = 1 /* File descriptor */
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.globl _start /* Magic linker symbol: --entry-address. */
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.text /* Program text. */
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hello: .ascii "Hello, GNU Mes!\n"
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bye:
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.equ string_size, (bye - hello)
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_start:
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li a7, SYS_write /* System call function: write, in a7. */
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li a0, stdout /* 1st parameter: file descriptor, in a0. */
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.equ string_offset, (hello - .)
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auipc a1, 0 /* Load pc for pc-relative address */
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addi a1, a1, string_offset /* 2nd parameter: address, in a1. */
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li a2, string_size /* 3rd parameter: byte count a2. */
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ecall /* Call system. */
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li a7, SYS_exit /* System call function: exit, in a7. */
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li a0, 0 /* 1st parameter: exit status, in a0. */
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ecall /* Call system. */
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wfi /* Should not be reached. */
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63
lib/linux/riscv64-mes-tcc/syscall-internal.c
Normal file
63
lib/linux/riscv64-mes-tcc/syscall-internal.c
Normal file
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@ -0,0 +1,63 @@
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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>
|
||||
* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
|
||||
* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
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*
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* This file is part of GNU Mes.
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||||
*
|
||||
* GNU Mes 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.
|
||||
*
|
||||
* GNU Mes 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
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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*
|
||||
|
||||
/* Returns < 0 on error (errno-like value from kernel), or 0 on success */
|
||||
int
|
||||
__raise (int signum)
|
||||
{
|
||||
long pid = __sys_call_internal (SYS_getpid);
|
||||
if (pid < 0)
|
||||
return pid;
|
||||
else
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||||
return __sys_call2_internal (SYS_kill, pid, signum);
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||||
}
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||||
198
lib/linux/riscv64-mes-tcc/syscall.c
Normal file
198
lib/linux/riscv64-mes-tcc/syscall.c
Normal file
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|
@ -0,0 +1,198 @@
|
|||
/* -*-comment-start: "//";comment-end:""-*-
|
||||
* GNU Mes --- Maxwell Equations of Software
|
||||
* Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
|
||||
* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
|
||||
* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
|
||||
*
|
||||
* This file is part of GNU Mes.
|
||||
*
|
||||
* GNU Mes 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.
|
||||
*
|
||||
* GNU Mes 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include <errno.h>
|
||||
#include <linux/riscv64/syscall.h>
|
||||
|
||||
// *INDENT-OFF*
|
||||
long
|
||||
__sys_call (long sys_call)
|
||||
{
|
||||
register long __a7 asm ("a7") = sys_call;
|
||||
register long __a0 asm ("a0");
|
||||
asm volatile (
|
||||
"ecall\n\t"
|
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: "=r" (__a0)
|
||||
: "r" (__a7)
|
||||
);
|
||||
return __a0;
|
||||
}
|
||||
|
||||
long
|
||||
__sys_call1 (long sys_call, long one)
|
||||
{
|
||||
register long __a7 asm ("a7") = sys_call;
|
||||
register long __a0 asm ("a0") = one;
|
||||
asm volatile (
|
||||
"ecall\n\t"
|
||||
: "+r" (__a0)
|
||||
: "r" (__a7)
|
||||
);
|
||||
return __a0;
|
||||
}
|
||||
|
||||
long
|
||||
__sys_call2 (long sys_call, long one, long two)
|
||||
{
|
||||
register long __a7 asm ("a7") = sys_call;
|
||||
register long __a0 asm ("a0") = one;
|
||||
register long __a1 asm ("a1") = two;
|
||||
asm volatile (
|
||||
"ecall\n\t"
|
||||
: "+r" (__a0)
|
||||
: "r" (__a7), "r" (__a1)
|
||||
);
|
||||
return __a0;
|
||||
}
|
||||
|
||||
long
|
||||
__sys_call3 (long sys_call, long one, long two, long three)
|
||||
{
|
||||
register long __a7 asm ("a7") = sys_call;
|
||||
register long __a0 asm ("a0") = one;
|
||||
register long __a1 asm ("a1") = two;
|
||||
register long __a2 asm ("a2") = three;
|
||||
asm volatile (
|
||||
"ecall\n\t"
|
||||
: "+r" (__a0)
|
||||
: "r" (__a7), "r" (__a1), "r" (__a2)
|
||||
);
|
||||
return __a0;
|
||||
}
|
||||
|
||||
long
|
||||
__sys_call4 (long sys_call, long one, long two, long three, long four)
|
||||
{
|
||||
register long __a7 asm ("a7") = sys_call;
|
||||
register long __a0 asm ("a0") = one;
|
||||
register long __a1 asm ("a1") = two;
|
||||
register long __a2 asm ("a2") = three;
|
||||
register long __a3 asm ("a3") = four;
|
||||
asm volatile (
|
||||
"ecall\n\t"
|
||||
: "+r" (__a0)
|
||||
: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3)
|
||||
);
|
||||
return __a0;
|
||||
}
|
||||
|
||||
long
|
||||
__sys_call5 (long sys_call, long one, long two, long three, long four, long five)
|
||||
{
|
||||
register long __a7 asm ("a7") = sys_call;
|
||||
register long __a0 asm ("a0") = one;
|
||||
register long __a1 asm ("a1") = two;
|
||||
register long __a2 asm ("a2") = three;
|
||||
register long __a3 asm ("a3") = four;
|
||||
register long __a4 asm ("a4") = five;
|
||||
asm volatile (
|
||||
"ecall\n\t"
|
||||
: "+r" (__a0)
|
||||
: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3), "r" (__a4)
|
||||
);
|
||||
return __a0;
|
||||
}
|
||||
// *INDENT-ON*
|
||||
|
||||
long
|
||||
_sys_call (long sys_call)
|
||||
{
|
||||
long r = __sys_call (sys_call);
|
||||
if (r < 0)
|
||||
{
|
||||
errno = -r;
|
||||
r = -1;
|
||||
}
|
||||
else
|
||||
errno = 0;
|
||||
return r;
|
||||
}
|
||||
|
||||
long
|
||||
_sys_call1 (long sys_call, long one)
|
||||
{
|
||||
long r = __sys_call1 (sys_call, one);
|
||||
if (r < 0)
|
||||
{
|
||||
errno = -r;
|
||||
r = -1;
|
||||
}
|
||||
else
|
||||
errno = 0;
|
||||
return r;
|
||||
}
|
||||
|
||||
long
|
||||
_sys_call2 (long sys_call, long one, long two)
|
||||
{
|
||||
long r = __sys_call2 (sys_call, one, two);
|
||||
if (r < 0)
|
||||
{
|
||||
errno = -r;
|
||||
r = -1;
|
||||
}
|
||||
else
|
||||
errno = 0;
|
||||
return r;
|
||||
}
|
||||
|
||||
long
|
||||
_sys_call3 (long sys_call, long one, long two, long three)
|
||||
{
|
||||
long r = __sys_call3 (sys_call, one, two, three);
|
||||
if (r < 0)
|
||||
{
|
||||
errno = -r;
|
||||
r = -1;
|
||||
}
|
||||
else
|
||||
errno = 0;
|
||||
return r;
|
||||
}
|
||||
|
||||
long
|
||||
_sys_call4 (long sys_call, long one, long two, long three, long four)
|
||||
{
|
||||
long r = __sys_call4 (sys_call, one, two, three, four);
|
||||
if (r < 0)
|
||||
{
|
||||
errno = -r;
|
||||
r = -1;
|
||||
}
|
||||
else
|
||||
errno = 0;
|
||||
return r;
|
||||
}
|
||||
|
||||
long
|
||||
_sys_call5 (long sys_call, long one, long two, long three, long four, long five)
|
||||
{
|
||||
long r = __sys_call5 (sys_call, one, two, three, four, five);
|
||||
if (r < 0)
|
||||
{
|
||||
errno = -r;
|
||||
r = -1;
|
||||
}
|
||||
else
|
||||
errno = 0;
|
||||
return r;
|
||||
}
|
||||
Loading…
Reference in a new issue