* First version that did something (others not committed)

2025-04-17 03:19:33 +02:00 · 2000-03-16 16:34:02 +00:00 · 2000-03-16 16:34:02 +00:00 · 62d2002d1f
commit 62d2002d1f
parent 0192ac7d51
1 changed files with 116 additions and 0 deletions
--- a/rtl/bsd/i386/crt1.s
+++ b/rtl/bsd/i386/crt1.s
@ -0,0 +1,116 @@
+	.file	"crt1.c"
+	.version	"01.01"
+gcc2_compiled.:
+.globl __progname
+.section	.rodata
+.LC0:
+	.ascii "\0"
+.data
+	.p2align 2
+	.type	 __progname,@object
+	.size	 __progname,4
+__progname:
+	.long .LC0
+        .align  4
+___fpucw:
+        .long   0x1332
+
+        .globl  ___fpc_brk_addr         /* heap management */
+        .type   ___fpc_brk_addr,@object
+        .size   ___fpc_brk_addr,4
+___fpc_brk_addr:
+        .long   0
+
+
+.text
+	.p2align 2
+.globl _start
+	.type	 _start,@function
+_start:
+	pushl %ebp
+	movl %esp,%ebp
+	pushl %edi
+	pushl %esi
+	pushl %ebx
+#APP
+	movl %edx,%edx
+#NO_APP
+        leal 8(%ebp),%edi
+        movl %edi,U_SYSLINUX_ARGV
+        mov -4(%edi),%eax
+        movl %eax,U_SYSLINUX_ARGC
+	movl 4(%ebp),%ebx
+        leal 12(%ebp,%ebx,4),%esi
+        movl %esi,U_SYSLINUX_ENVP
+	movl %esi,environ
+	testl %ebx,%ebx
+	jle .L2
+	movl 8(%ebp),%eax
+	testl %eax,%eax
+	je .L2
+	movl %eax,__progname
+	cmpb $0,(%eax)
+	je .L2
+	.p2align 2,0x90
+.L6:
+	cmpb $47,(%eax)
+	jne .L5
+	leal 1(%eax),%ecx
+	movl %ecx,__progname
+.L5:
+	incl %eax
+	cmpb $0,(%eax)
+	jne .L6
+.L2:
+#movl $_DYNAMIC,%eax
+#testl %eax,%eax
+#je .L9
+#pushl %edx
+#call atexit
+#addl $4,%esp
+.L9:
+#pushl $_fini
+#call atexit
+#call _init
+#pushl %esi
+#pushl %edi
+#pushl %ebx
+
+# copied from linux
+
+        finit                           /* initialize fpu */
+        fwait
+        fldcw   ___fpucw
+
+        xorl    %ebp,%ebp
+
+	call main
+	pushl %eax
+	jmp   _haltproc
+
+
+
+
+.globl _haltproc 
+.type _haltproc,@function
+
+_haltproc:
+           mov $1,%eax	
+           movzwl U_SYSLINUX_EXITCODE,%ebx
+	   pushl %ebx
+           call _actualsyscall
+           addl  $4,%esp
+           jmp   _haltproc
+
+.globl _actualsyscall 
+.type _actualsyscall,@function
+
+_actualsyscall:
+         int $0x80
+         ret
+	.p2align 2,0x90
+.Lfe1:
+	.size	 _start,.Lfe1-_start
+	.comm	environ,4,4
+	.weak	_DYNAMIC
+	.ident	"GCC: (GNU) 2.7.2.1"