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x86: lib: Use __init_io.

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* build-aux/configure-lib.sh (libc_mini_shared_SOURCES): Add init_io.c.
* include/mes/lib-mini.h (__init_io): Declare it.
* lib/linux/x86-mes-gcc/crt1.c (_start): Replace manual initialization
of __stdin, __stdout, __stderr, and environ with __init_io ().
* lib/linux/x86-mes-m2/crt1.M1 (_start): Likewise.
* lib/linux/x86-mes-mescc/crt1.c (_start): Likewise.
This commit is contained in:
Janneke Nieuwenhuizen 2023-05-03 19:48:10 +02:00
parent 68f3db77cf
commit 1e898ea312
5 changed files with 29 additions and 70 deletions
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3
build-aux/configure-lib.sh
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@ -1,7 +1,7 @@
#! /bin/sh
# GNU Mes --- Maxwell Equations of Software
# Copyright © 2019,2020,2021 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
# Copyright © 2019,2020,2021,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
#
# This file is part of GNU Mes.
#
@ -30,6 +30,7 @@ fi
. ./config.sh
libc_mini_shared_SOURCES="
lib/mes/__init_io.c
lib/mes/eputs.c
lib/mes/oputs.c
"

3
include/mes/lib-mini.h
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@ -1,6 +1,6 @@
/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2016,2017,2018,2020,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
* Copyright © 2016,2017,2018,2020,2022,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
@ -51,6 +51,7 @@ extern int __stdin;
extern int __stdout;
extern int __stderr;
void __init_io ();
int eputs (char const *s);
int puts (char const *s);
int oputs (char const *s);

43
lib/linux/x86-mes-gcc/crt1.c
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@ -1,6 +1,6 @@
/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
* Copyright © 2017,2018,2019,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
* Copyright © 2021 Paul Dersey <pdersey@gmail.com>
*
* This file is part of GNU Mes.
@ -20,45 +20,21 @@
*/
#include <mes/lib-mini.h>
//int main (int argc, char *argv[], char *envp[]);
int main (int argc, char *argv[], char *envp[]);
// *INDENT-OFF*
void
_start ()
{
asm (
"mov $0,%%eax\n\t"
"mov %%eax,%0\n"
: "=r" (__stdin)
: //no inputs ""
);
"mov %ebp,%eax\n\t"
"add $4,%eax\n\t"
"mov (%eax),%eax\n\t"
"add $3,%eax\n\t"
"shl $2,%eax\n\t"
"add %ebp,%eax\n\t"
"push %eax\n\t"
asm (
"mov $1,%%eax\n\t"
"mov %%eax,%0\n"
: "=r" (__stdout)
: //no inputs ""
);
asm (
"mov $2,%%eax\n\t"
"mov %%eax,%0\n"
: "=r" (__stderr)
: //no inputs ""
);
asm (
"mov %%ebp,%%eax\n\t"
"add $4,%%eax\n\t"
"mov (%%eax),%%eax\n\t"
"add $3,%%eax\n\t"
"shl $2,%%eax\n\t"
"add %%ebp,%%eax\n\t"
"mov %%eax,%0\n\t"
"push %%eax\n\t"
: "=r" (environ)
: //no inputs ""
);
asm (
"mov %ebp,%eax\n\t"
"add $8,%eax\n\t"
"push %eax\n\t"
@ -68,6 +44,7 @@ _start ()
"mov (%eax),%eax\n\t"
"push %eax\n\t"
"call __init_io\n\t"
"call main\n\t"
"mov %eax,%ebx\n\t"

30
lib/linux/x86-mes-m2/crt1.M1
View file

@ -1,5 +1,5 @@
### GNU Mes --- Maxwell Equations of Software
### Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
### Copyright © 2017,2018,2019,2023 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
###
### This file is part of GNU Mes.
###
@ -19,22 +19,8 @@
:_start
push___%ebp
mov____%esp,%ebp
sub____$i32,%esp %0x1054
mov____$i8,%eax !0
mov____%eax,0x32 &GLOBAL___stdin
mov____$i8,%eax !1
mov____%eax,0x32 &GLOBAL___stdout
mov____$i8,%eax !2
mov____%eax,0x32 &GLOBAL___stderr
mov____%ebp,%eax
add____$i8,%eax !4
mov____(%eax),%eax
add____$i8,%eax !3
shl____$i8,%eax !0x02
add____%ebp,%eax
mov____%eax,0x32 &GLOBAL_environ
mov____%esp,%edi ; M2-Planet calling convention pushes forward
;; M2-Planet calling convention pushes forward
mov____%ebp,%eax ; argc
add____$i8,%eax !4
mov____(%eax),%eax
@ -44,10 +30,16 @@
add____$i8,%eax !8
push___%eax
mov____0x32,%eax &GLOBAL_environ
push___%eax
mov____%ebp,%eax ; envp
add____$i8,%eax !4
mov____(%eax),%eax
add____$i8,%eax !3
shl____$i8,%eax !0x02
add____%ebp,%eax
mov____%eax,%ebx
push___%ebx
mov____%edi,%ebp ; M2-Planet calling convention
call32 %FUNCTION___init_io
call32 %FUNCTION_main
add____$i8,%esp !0x0
test___%eax,%eax

20
lib/linux/x86-mes-mescc/crt1.c
View file

@ -19,41 +19,29 @@
*/
#include "mes/lib-mini.h"
int main (int argc, char *argv[], char *envp[]);
int
_start ()
{
asm ("mov____$i8,%eax !0");
asm ("mov____%eax,0x32 &__stdin");
asm ("mov____$i8,%eax !1");
asm ("mov____%eax,0x32 &__stdout");
asm ("mov____$i8,%eax !2");
asm ("mov____%eax,0x32 &__stderr");
asm ("mov____%ebp,%eax");
asm ("mov____%ebp,%eax"); //environ
asm ("add____$i8,%eax !4");
asm ("mov____(%eax),%eax");
asm ("add____$i8,%eax !3");
asm ("shl____$i8,%eax !0x02");
asm ("add____%ebp,%eax");
asm ("mov____%eax,0x32 &environ");
asm ("push___%eax");
asm ("mov____%ebp,%eax");
asm ("mov____%ebp,%eax"); // argv
asm ("add____$i8,%eax !8");
asm ("push___%eax");
asm ("mov____%ebp,%eax");
asm ("mov____%ebp,%eax"); // argc
asm ("add____$i8,%eax !4");
asm ("mov____(%eax),%eax");
asm ("push___%eax");
__init_io ();
main ();
asm ("mov____%eax,%ebx");