2017-04-02 10:29:09 +00:00
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/* -*-comment-start: "//";comment-end:""-*-
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* Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of Mes.
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*
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* 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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* 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 Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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2017-04-17 00:24:20 +00:00
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char **g_environment = 0;
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2017-04-02 10:29:09 +00:00
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int g_stdin = 0;
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2017-05-02 21:30:46 +00:00
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#include <stdio.h>
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#include <mlibc.h>
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2017-03-22 06:54:45 +00:00
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2017-05-21 20:25:02 +00:00
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#if __GNUC__
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2017-05-02 21:30:46 +00:00
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#include <stdlib.h>
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2017-05-21 20:25:02 +00:00
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#endif
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#if __GNUC__ && !POSIX
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2017-04-12 19:27:59 +00:00
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2017-04-02 10:29:09 +00:00
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void
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exit (int code)
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{
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %0,%%ebx\n\t"
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"mov $1,%%eax\n\t"
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"int $0x80"
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2017-04-02 10:29:09 +00:00
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: // no outputs "=" (r)
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: "" (code)
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);
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// not reached
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exit (0);
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}
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int
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read (int fd, void* buf, size_t n)
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{
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int r;
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//syscall (SYS_write, fd, s, n));
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %1,%%ebx\n\t"
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"mov %2,%%ecx\n\t"
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"mov %3,%%edx\n\t"
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2017-03-22 06:54:45 +00:00
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2017-04-02 10:29:09 +00:00
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"movl $0x3,%%eax\n\t"
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"int $0x80\n\t"
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2017-03-22 06:54:45 +00:00
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2017-07-02 14:25:14 +00:00
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"mov %%eax,%0\n\t"
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2017-04-02 10:29:09 +00:00
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: "=r" (r)
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: "" (fd), "" (buf), "" (n)
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: "eax", "ebx", "ecx", "edx"
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);
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return r;
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}
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int
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2017-04-16 07:51:45 +00:00
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write (int fd, char const* s, int n)
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2017-04-02 10:29:09 +00:00
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{
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int r;
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2017-04-16 07:51:45 +00:00
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//syscall (SYS_write, fd, s, n));
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2017-04-02 10:29:09 +00:00
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %1,%%ebx\n\t"
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"mov %2,%%ecx\n\t"
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"mov %3,%%edx\n\t"
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2017-04-16 07:51:45 +00:00
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2017-07-02 14:25:14 +00:00
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"mov $0x4, %%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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2017-04-02 10:29:09 +00:00
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: "=r" (r)
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2017-04-16 07:51:45 +00:00
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: "" (fd), "" (s), "" (n)
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: "eax", "ebx", "ecx", "edx"
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2017-04-02 10:29:09 +00:00
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);
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return r;
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}
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2017-04-12 19:27:59 +00:00
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int
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2017-05-19 04:56:47 +00:00
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open (char const *s, int flags, ...)
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2017-04-02 10:29:09 +00:00
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{
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2017-05-19 04:56:47 +00:00
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int mode;
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %%ebp,%%eax\n\t"
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"add $0x10,%%eax\n\t"
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"mov (%%eax),%%eax\n\t"
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"mov %%eax,%0\n\t"
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2017-05-19 04:56:47 +00:00
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: "=mode" (mode)
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: //no inputs ""
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);
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2017-04-02 10:29:09 +00:00
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int r;
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2017-04-16 07:51:45 +00:00
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//syscall (SYS_open, mode));
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2017-04-02 10:29:09 +00:00
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %1,%%ebx\n\t"
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"mov %2,%%ecx\n\t"
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"mov %3,%%edx\n\t"
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"mov $0x5,%%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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2017-04-12 19:27:59 +00:00
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: "=r" (r)
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2017-05-19 04:56:47 +00:00
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: "" (s), "" (flags), "" (mode)
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: "eax", "ebx", "ecx", "edx"
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2017-04-02 10:29:09 +00:00
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);
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2017-04-12 19:27:59 +00:00
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return r;
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2017-04-02 10:29:09 +00:00
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}
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2017-04-15 13:13:38 +00:00
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int
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2017-04-16 07:51:45 +00:00
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access (char const *s, int mode)
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2017-04-15 13:13:38 +00:00
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{
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int r;
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2017-04-16 07:51:45 +00:00
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//syscall (SYS_access, mode));
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2017-04-15 13:13:38 +00:00
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %1,%%ebx\n\t"
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"mov %2,%%ecx\n\t"
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"mov $0x21,%%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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2017-04-15 13:13:38 +00:00
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: "=r" (r)
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2017-04-16 07:51:45 +00:00
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: "" (s), "" (mode)
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: "eax", "ebx", "ecx"
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2017-04-15 13:13:38 +00:00
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);
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return r;
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}
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2017-03-22 06:54:45 +00:00
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void *
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brk (void *p)
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{
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void *r;
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %1,%%ebx\n\t"
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2017-03-22 06:54:45 +00:00
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2017-07-02 14:25:14 +00:00
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"mov $0x2d,%%eax\n\t"
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"int $0x80\n\t"
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2017-03-22 06:54:45 +00:00
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2017-07-02 14:25:14 +00:00
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"mov %%eax,%0\n\t"
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2017-03-22 06:54:45 +00:00
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: "=r" (r)
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: "" (p)
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: "eax", "ebx"
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);
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return r;
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}
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2017-04-16 07:51:45 +00:00
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int
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fsync (int fd)
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{
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int r;
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//syscall (SYS_fsync, fd));
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asm (
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2017-07-02 14:25:14 +00:00
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"mov %1,%%ebx\n\t"
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2017-04-16 07:51:45 +00:00
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2017-07-02 14:25:14 +00:00
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"mov $0x76, %%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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2017-04-16 07:51:45 +00:00
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: "=r" (r)
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: "" (fd)
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: "eax", "ebx"
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);
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return r;
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}
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2017-03-25 14:58:44 +00:00
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int
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2017-04-12 19:27:59 +00:00
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fputc (int c, int fd)
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2017-03-25 14:58:44 +00:00
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{
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write (fd, (char*)&c, 1);
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return 0;
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}
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2017-08-01 09:08:14 +00:00
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void
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free (void *ptr)
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2017-04-02 10:29:09 +00:00
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{
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}
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2017-07-27 21:44:22 +00:00
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char *g_brk = 0;
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2017-03-22 06:54:45 +00:00
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2017-04-02 10:29:09 +00:00
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void *
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malloc (size_t size)
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{
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2017-07-27 21:44:22 +00:00
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if (!g_brk)
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g_brk = brk (0);
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2017-08-10 19:00:22 +00:00
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if ((int)brk (g_brk + size) == -1)
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2017-07-27 21:44:22 +00:00
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return 0;
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char *p = g_brk;
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g_brk += size;
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2017-03-22 06:54:45 +00:00
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return p;
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}
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void *
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2017-08-01 09:08:14 +00:00
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memcpy (void *dest, void const *src, size_t n)
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2017-03-22 06:54:45 +00:00
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{
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2017-08-01 09:08:14 +00:00
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char* p = dest;
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2017-08-10 19:00:22 +00:00
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char const* q = src;
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2017-08-01 09:08:14 +00:00
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while (n--) *p++ = *q++;
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return dest;
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}
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int
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putchar (int c)
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{
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write (STDOUT, (char*)&c, 1);
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return 0;
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}
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void *
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realloc (void *ptr, size_t size)
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{
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void *new = malloc (size);
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if (ptr && new)
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{
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memcpy (new, ptr, size);
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free (ptr);
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}
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return new;
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2017-04-02 10:29:09 +00:00
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}
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size_t
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strlen (char const* s)
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{
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int i = 0;
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while (s[i]) i++;
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return i;
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}
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int
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strcmp (char const* a, char const* b)
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{
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while (*a && *b && *a == *b) {a++;b++;}
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return *a - *b;
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}
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2017-05-08 19:15:53 +00:00
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char *
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strcpy (char *dest, char const *src)
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{
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char *p = dest;
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while (*src) *p++ = *src++;
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*p = 0;
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return dest;
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}
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2017-04-02 10:29:09 +00:00
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int
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fputs (char const* s, int fd)
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{
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int i = strlen (s);
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write (fd, s, i);
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return 0;
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}
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int
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puts (char const* s)
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{
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int i = strlen (s);
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2017-03-25 14:58:44 +00:00
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write (STDOUT, s, i);
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2017-04-02 10:29:09 +00:00
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return 0;
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}
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2017-03-22 06:54:45 +00:00
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void
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assert_fail (char* s)
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{
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eputs ("assert fail: ");
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eputs (s);
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eputs ("\n");
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*((int*)0) = 0;
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}
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#define assert(x) ((x) ? (void)0 : assert_fail (#x))
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int ungetc_char = -1;
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2017-03-23 17:57:06 +00:00
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char ungetc_buf[2];
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2017-03-22 06:54:45 +00:00
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int
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getchar ()
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{
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char c;
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int i;
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if (ungetc_char == -1)
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{
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int r = read (g_stdin, &c, 1);
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if (r < 1) return -1;
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i = c;
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}
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else
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2017-03-23 17:57:06 +00:00
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i = ungetc_buf[ungetc_char--];
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2017-03-22 06:54:45 +00:00
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if (i < 0) i += 256;
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mescc: Run module/base-0.mes.
* gc.c: New file.
* vector.c: New file.
* mes.c: Remove vector and gc functions, include vector.c, gc.c.
* GNUmakefile (mes.o): Add gc, vector dependencies.
* scaffold/mini-mes.c (eval_apply): Support primitive-load through
read_input_file.
(getenv_, open_input_file, current_input_port,
set_current_input_port force_output, exit_, values, arity_, xassq,
is_p, minus, plus, divide, modulo multiply, logior, ash): New function.
(mes_symbols): Add symbols %gnuc, %mesc.
* scaffold/mini-mes.c (): New functions.
* scaffold/b-0.mes: New file.
* scaffold/t-0.mes: New file.
2017-03-26 19:13:01 +00:00
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2017-03-22 06:54:45 +00:00
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return i;
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}
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int
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ungetc (int c, int fd)
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{
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2017-03-23 17:57:06 +00:00
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assert (ungetc_char < 2);
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ungetc_buf[++ungetc_char] = c;
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2017-03-22 06:54:45 +00:00
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return c;
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}
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2017-04-17 00:24:20 +00:00
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char const* itoa (int);
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int
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2017-05-02 21:30:46 +00:00
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strncmp (char const* a, char const* b, size_t length)
|
2017-04-17 00:24:20 +00:00
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{
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while (*a && *b && *a == *b && --length) {a++;b++;}
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return *a - *b;
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}
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2017-05-23 05:16:08 +00:00
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char *
|
2017-04-17 00:24:20 +00:00
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getenv (char const* s)
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{
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char **p = g_environment;
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int length = strlen (s);
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while (*p)
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{
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if (!strncmp (s, *p, length) && *(*p + length) == '=') return (*p + length + 1);
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p++;
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}
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return 0;
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}
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|
|
2017-04-12 19:27:59 +00:00
|
|
|
int
|
|
|
|
isdigit (int c)
|
|
|
|
{
|
|
|
|
return (c>='0') && (c<='9');
|
|
|
|
}
|
2017-04-17 21:29:54 +00:00
|
|
|
|
|
|
|
int
|
|
|
|
atoi (char const *s)
|
|
|
|
{
|
|
|
|
int i = 0;
|
|
|
|
int sign = 1;
|
|
|
|
if (*s && *s == '-')
|
|
|
|
{
|
|
|
|
sign = -1;
|
|
|
|
s++;
|
|
|
|
}
|
|
|
|
while (isdigit (*s))
|
|
|
|
{
|
|
|
|
i *= 10;
|
|
|
|
i += (*s - '0');
|
|
|
|
s++;
|
|
|
|
}
|
|
|
|
return i * sign;
|
|
|
|
}
|
2017-05-02 15:00:07 +00:00
|
|
|
|
2017-07-09 07:24:07 +00:00
|
|
|
|
|
|
|
// FIXME: copied from libc-mes.c now
|
|
|
|
#include <stdarg.h>
|
|
|
|
|
2017-05-02 15:00:07 +00:00
|
|
|
int
|
2017-07-09 07:24:07 +00:00
|
|
|
vprintf (char const* format, va_list ap)
|
2017-05-02 15:00:07 +00:00
|
|
|
{
|
|
|
|
char const *p = format;
|
|
|
|
while (*p)
|
|
|
|
if (*p != '%')
|
|
|
|
putchar (*p++);
|
|
|
|
else
|
|
|
|
{
|
|
|
|
p++;
|
|
|
|
char c = *p;
|
|
|
|
switch (c)
|
|
|
|
{
|
|
|
|
case '%': {putchar (*p); break;}
|
2017-07-09 07:24:07 +00:00
|
|
|
case 'c': {char c; c = va_arg (ap, char); putchar (c); break;}
|
|
|
|
case 'd': {int d; d = va_arg (ap, int); puts (itoa (d)); break;}
|
|
|
|
case 's': {char *s; s = va_arg (ap, char *); puts (s); break;}
|
2017-05-02 15:00:07 +00:00
|
|
|
default: putchar (*p);
|
|
|
|
}
|
|
|
|
p++;
|
|
|
|
}
|
2017-07-09 07:24:07 +00:00
|
|
|
va_end (ap);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
printf (char const* format, ...)
|
|
|
|
{
|
|
|
|
va_list ap;
|
|
|
|
va_start (ap, format);
|
|
|
|
int r = vprintf (format, ap);
|
|
|
|
va_end (ap);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
2017-08-12 15:38:44 +00:00
|
|
|
vsprintf (char *str, char const* format, va_list ap)
|
2017-07-09 07:24:07 +00:00
|
|
|
{
|
|
|
|
char const *p = format;
|
|
|
|
while (*p)
|
|
|
|
if (*p != '%')
|
|
|
|
*str++ = *p++;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
p++;
|
|
|
|
char c = *p;
|
|
|
|
switch (c)
|
|
|
|
{
|
|
|
|
case '%': {*str++ = *p; break;}
|
|
|
|
case 'c': {char c; c = va_arg (ap, char); *str++ = c; break;}
|
|
|
|
case 'd': {int d; d = va_arg (ap, int); char const *s = itoa (d); while (*s) *str++ = *s++; break;}
|
|
|
|
case 's': {char *s; s = va_arg (ap, char *); while (*s) *str++ = *s++; break;}
|
|
|
|
default: *str++ = *p;
|
|
|
|
}
|
|
|
|
p++;
|
|
|
|
}
|
2017-08-12 15:38:44 +00:00
|
|
|
|
|
|
|
*str = 0;
|
|
|
|
return strlen (str);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
sprintf (char *str, char const* format, ...)
|
|
|
|
{
|
|
|
|
va_list ap;
|
|
|
|
va_start (ap, format);
|
|
|
|
int r = vsprintf (str, format, ap);
|
2017-07-09 07:24:07 +00:00
|
|
|
va_end (ap);
|
2017-08-12 15:38:44 +00:00
|
|
|
return r;
|
2017-05-02 15:00:07 +00:00
|
|
|
}
|
2017-04-12 19:27:59 +00:00
|
|
|
#endif
|
|
|
|
|
2017-04-02 10:29:09 +00:00
|
|
|
char itoa_buf[10];
|
|
|
|
|
|
|
|
char const*
|
|
|
|
itoa (int x)
|
|
|
|
{
|
|
|
|
//static char itoa_buf[10];
|
|
|
|
//char *p = buf+9;
|
|
|
|
char *p = itoa_buf;
|
|
|
|
p += 9;
|
|
|
|
*p-- = 0;
|
|
|
|
|
|
|
|
//int sign = x < 0;
|
|
|
|
int sign;
|
|
|
|
sign = x < 0;
|
|
|
|
if (sign)
|
|
|
|
x = -x;
|
|
|
|
|
|
|
|
do
|
|
|
|
{
|
|
|
|
*p-- = '0' + (x % 10);
|
|
|
|
x = x / 10;
|
|
|
|
} while (x);
|
|
|
|
|
|
|
|
if (sign)
|
|
|
|
*p-- = '-';
|
|
|
|
|
|
|
|
return p+1;
|
|
|
|
}
|
|
|
|
|
2017-04-12 19:27:59 +00:00
|
|
|
#if POSIX
|
|
|
|
#define _GNU_SOURCE
|
|
|
|
#include <assert.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <unistd.h>
|
2017-05-02 21:30:46 +00:00
|
|
|
#endif // POSIX
|
2017-04-12 19:27:59 +00:00
|
|
|
|
mescc: Mini-mes (gcc-compiled) runs read-0.mes.
* module/language/c99/compiler.mes (expr->accu): Add mul.
(test->jump->info): Add le, ge.
(ast->info): Support int and char* initialization at top level.
* module/mes/as-i386.mes (i386:accu*base, i386:Xjump-cz,
i386:Xjump-ncz): New function.
* module/mes/as-i386.scm: Export them.
* doc/examples/t.c (test): Test them.
* module/mes/libc.mes (ungetc): New function.
(getchar): Support it.
(assert_fail, isdigit): New functions.
(libc): Export them.
* module/mes/mini-0.mes: Load full reader.
* mlibc.c (ungetc): New function.
(getchar): Support it.
(assert_fail, isdigit): New functions.
* mes.c (list length error lookup_ getchar ungetchar peekchar
peek_byte read_byte unread_byte greater_p less_p): Move functions
needed to run read-0.mes into core.
* doc/examples/mini-mes.c: Likewise.
* lib.c (length, error): Comment-out.
* math.c (greater_p, less_p): Comment-out.
* posix.c: (getchar, ungetchar, peekchar, peek_byte, read_byte,
unread_byte): Comment-out.
* reader.c (lookup_): Comment-out.
2017-03-22 05:39:24 +00:00
|
|
|
int
|
2017-04-12 19:27:59 +00:00
|
|
|
fdputs (char const* s, int fd)
|
2017-04-02 10:29:09 +00:00
|
|
|
{
|
2017-04-12 19:27:59 +00:00
|
|
|
int i = strlen (s);
|
|
|
|
write (fd, s, i);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-08-06 11:53:56 +00:00
|
|
|
int
|
|
|
|
eputc (int c)
|
|
|
|
{
|
|
|
|
return fdputc (c, STDERR);
|
|
|
|
}
|
|
|
|
|
2017-08-06 10:16:34 +00:00
|
|
|
int
|
|
|
|
eputs (char const* s)
|
|
|
|
{
|
|
|
|
return fdputs (s, STDERR);
|
|
|
|
}
|
2017-05-02 21:30:46 +00:00
|
|
|
|
2017-04-12 19:27:59 +00:00
|
|
|
int
|
|
|
|
fdputc (int c, int fd)
|
|
|
|
{
|
|
|
|
write (fd, (char*)&c, 1);
|
|
|
|
return 0;
|
2017-04-02 10:29:09 +00:00
|
|
|
}
|
2017-04-12 19:27:59 +00:00
|
|
|
|
2017-08-06 10:16:34 +00:00
|
|
|
#if POSIX
|
|
|
|
|
2017-04-12 19:27:59 +00:00
|
|
|
int
|
|
|
|
putchar (int c)
|
|
|
|
{
|
|
|
|
write (STDOUT, (char*)&c, 1);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int ungetc_char = -1;
|
|
|
|
char ungetc_buf[2];
|
|
|
|
|
|
|
|
int
|
|
|
|
getchar ()
|
|
|
|
{
|
|
|
|
char c;
|
|
|
|
int i;
|
|
|
|
if (ungetc_char == -1)
|
|
|
|
{
|
|
|
|
int r = read (g_stdin, &c, 1);
|
|
|
|
if (r < 1) return -1;
|
|
|
|
i = c;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
i = ungetc_buf[ungetc_char--];
|
|
|
|
|
|
|
|
if (i < 0) i += 256;
|
|
|
|
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
fdungetc (int c, int fd)
|
|
|
|
{
|
|
|
|
assert (ungetc_char < 2);
|
|
|
|
ungetc_buf[++ungetc_char] = c;
|
|
|
|
return c;
|
|
|
|
}
|
|
|
|
|
2017-05-02 21:30:46 +00:00
|
|
|
#endif // POSIX
|
2017-05-21 20:25:02 +00:00
|
|
|
|
|
|
|
#if __GNUC__ && !POSIX
|
2017-07-27 21:44:22 +00:00
|
|
|
|
2017-05-21 20:25:02 +00:00
|
|
|
void
|
|
|
|
_start ()
|
|
|
|
{
|
|
|
|
// char **;
|
|
|
|
asm (
|
|
|
|
"mov %%ebp,%%eax\n\t"
|
|
|
|
"addl $4,%%eax\n\t"
|
|
|
|
"movzbl (%%eax),%%eax\n\t"
|
|
|
|
"addl $3,%%eax\n\t"
|
|
|
|
"shl $2,%%eax\n\t"
|
|
|
|
"add %%ebp,%%eax\n\t"
|
|
|
|
"movl %%eax,%0\n\t"
|
|
|
|
: "=g_environment" (g_environment)
|
|
|
|
: //no inputs ""
|
|
|
|
);
|
|
|
|
int r;
|
|
|
|
asm (
|
|
|
|
"mov %%ebp,%%eax\n\t"
|
|
|
|
"addl $8,%%eax\n\t"
|
|
|
|
"push %%eax\n\t"
|
|
|
|
|
|
|
|
"mov %%ebp,%%eax\n\t"
|
|
|
|
"addl $4,%%eax\n\t"
|
|
|
|
"movzbl (%%eax),%%eax\n\t"
|
|
|
|
"push %%eax\n\t"
|
|
|
|
|
|
|
|
"call main\n\t"
|
|
|
|
"movl %%eax,%0\n\t"
|
|
|
|
: "=r" (r)
|
|
|
|
: //no inputs ""
|
|
|
|
);
|
|
|
|
exit (r);
|
|
|
|
}
|
2017-07-27 21:44:22 +00:00
|
|
|
|
2017-05-21 20:25:02 +00:00
|
|
|
#endif // __GNUC__ && !POSIX
|