55d38162be
* build-aux/configure-lib.sh (libmescc_SOURCES): Add lib/mes/div.c, lib/linux/*/syscall-internal.c. * build-aux/build-lib.sh: Add libmescc.a. * build-aux/build-mes.sh: On gcc, add "-lmescc". * build-aux/test-c.sh: Add "-lmescc". * build-aux/check.sh.in: Add mescc to LIBS. * module/mescc/mescc.scm (mescc:link): Add "mescc". * module/mescc.scm (mescc:main): Update documentation of "-nodefaultlibs" and "-nostdlib". * lib/mes/div.c (ldiv): Rename to... (__mesabi_ldiv): ...this. Avoid assert. (__mesabi_div0): Avoid assert. (__aeabi_idivmod): New procedure. (__aeabi_idiv): New procedure. (__aeabi_uidivmod): New procedure. (__aeabi_uidiv): New procedure. * lib/linux/x86-mes-gcc/syscall.c (__sys_call, __sys_call1, __sys_call2, __sys_call3, __sys_call4): Move to... * lib/linux/x86-mes-gcc/syscall-internal.c: ...here. (__raise): New procedure. * lib/linux/x86-mes-mescc/syscall.c (__sys_call, __sys_call1, __sys_call2, __sys_call3, __sys_call4): Move to... * lib/linux/x86-mes-mescc/syscall-internal.c: ...here. (__raise): New procedure. * lib/linux/arm-mes-gcc/syscall.c: New file. * lib/linux/arm-mes-gcc/syscall-internal.c: New file. * lib/linux/arm-mes-mescc/syscall.c: New file. * lib/linux/arm-mes-mescc/syscall-internal.c: New file. * lib/gnu/syscall.c (__syscall, __syscall2, __syscall_get, __syscall_put): Move to... * lib/gnu/syscall-internal.c: ...here.
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
/* -*-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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*
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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/x86/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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long r;
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asm (
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"mov %1,%%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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: "=r" (r)
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: "rm" (sys_call)
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: "eax"
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);
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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;
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asm (
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"mov %1,%%eax\n\t"
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"mov %2,%%ebx\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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: "=r" (r)
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: "rm" (sys_call), "rm" (one)
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: "eax", "ebx"
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);
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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;
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asm (
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"mov %1,%%eax\n\t"
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"mov %2,%%ebx\n\t"
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"mov %3,%%ecx\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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: "=r" (r)
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: "rm" (sys_call), "rm" (one), "rm" (two)
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: "eax", "ebx", "ecx"
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);
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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;
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asm (
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"mov %2,%%ebx\n\t"
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"mov %3,%%ecx\n\t"
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"mov %4,%%edx\n\t"
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"mov %1,%%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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: "=r" (r)
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: "rm" (sys_call), "rm" (one), "rm" (two), "rm" (three)
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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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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;
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asm (
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"mov %2,%%ebx\n\t"
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"mov %3,%%ecx\n\t"
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"mov %4,%%edx\n\t"
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"mov %5,%%esi\n\t"
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"mov %1,%%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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: "=r" (r)
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: "rm" (sys_call), "rm" (one), "rm" (two), "rm" (three), "rm" (four)
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: "eax", "ebx", "ecx", "edx", "esi"
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);
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return r;
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}
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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 (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 (SYS_kill, pid, signum);
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}
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