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{
This file is part of the Free Pascal run time library.
Copyright (c) 2005 by Michael Van Canneyt, Peter Vreman,
& Daniel Mantione, members of the Free Pascal development team.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program 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.
**********************************************************************}
{
FreeBSD/x86 ELF startup code for Free Pascal
Stack layout at program start:
nil
envn
....
.... ENVIRONMENT VARIABLES
env1
env0
nil
argn
....
.... COMMAND LINE OPTIONS
arg1
arg0
argc <--- esp
}
var
libc_fpc_ret, libc_fpc_ret_ebx, libc_fpc_ret_ebp: ptrint; { return address to libc }
__progname : pchar; cvar;
procedure get_rtld_cleanup; external name 'get_rtld_cleanup';
procedure atexit; external name 'atexit';
procedure init_tls; external name '_init_tls';
procedure libc_start_main; external name '__libc_start_main';
procedure PASCALMAIN; external name 'PASCALMAIN';
var progname : pchar cvar; // = '';
__fpucw : word; cvar; // = 0x1332;
{******************************************************************************
libc 2.1 library start/halt
******************************************************************************}
{$asmmode ATT}
procedure _FPC_libc_start; assembler; nostackframe; public name '_start';
asm
pushl %ebp
movl %esp,%ebp
subl $40,%esp
call get_rtld_cleanup
movl %eax,%edx
pushl %edi
pushl %esi
pushl %ebx
#APP
movl %edx,%edx
#NO_APP
leal 8(%ebp),%edi
movl %edi,operatingsystem_parameter_argv
mov -4(%edi),%eax
movl %eax,operatingsystem_parameter_argc
movl 4(%ebp),%ebx
leal 12(%ebp,%ebx,4),%esi
movl %esi,operatingsystem_parameter_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 .LTLS
pushl %edx
call atexit
addl $4,%esp
.L9:
pushl $_fini
call atexit
call _init
# pushl %esi
# pushl %edi
# pushl %ebx
# call main
# pushl %eax
# call exit
finit /* initialize fpu */
fwait
fldcw ___fpucw
xorl %ebp,%ebp
call main
pushl %eax
jmp _haltproc
.LTLS:
call _init_tls
jmp .L9
get_rtld_cleanup:
pushl %ebp
movl %esp, %ebp
subl $4, %esp
#APP
movl %edx,-4(%ebp)
#NO_APP
movl -4(%ebp), %eax
leave
ret
end;
procedure _FPC_libc_haltproc; assembler; nostackframe; public name '_haltproc';
asm
mov $1,%eax
movzwl operatingsystem_result,%ebx
pushl %ebx
call .Lactualsyscall
addl $4,%esp
jmp _haltproc
.Lactualsyscall:
int $0x80
jb .LErrorcode
xor %ebx,%ebx
ret
.section .note.ABI-tag,"a",@progbits
.p2align 2
.type abitag, @object
.size abitag, 24
abitag:
.long 8
.long 4
.long 1
.string "FreeBSD"
.long 900044
.LErrorcode:
mov %eax,%ebx
mov $-1,%eax
end;
.file "cprt0.as"
.ident "FreePascal 2.2.x series dynlinked"
.section .rodata.str1.1,"aMS",@progbits,1
.LC0:
.string ""
.data
.p2align 2
.globl __progname
.type __progname,@object
.size __progname,4
__progname:
.long .LC0
.text
.p2align 2,,3
.type __fpucw,@object
.size __fpucw,4
.global __fpucw
___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 4,,15
.globl _start
.type _start,@function
_start:
.p2align 2,0x90
.Lfe1:
.size _start,.Lfe1-_start
.comm environ,4,4
.p2align 4,,15
.type get_rtld_cleanup, @function
.weak _DYNAMIC
.ident "GCC: (GNU) 3.4.2 - FPC: 2.2.0"
.bss
.type __stkptr,@object
.size __stkptr,4
.global __stkptr
__stkptr:
.skip 4
.type operatingsystem_parameters,@object
.size operatingsystem_parameters,12
operatingsystem_parameters:
.skip 3*4
.global operatingsystem_parameter_envp
.global operatingsystem_parameter_argc
.global operatingsystem_parameter_argv
.set operatingsystem_parameter_envp,operatingsystem_parameters+0
.set operatingsystem_parameter_argc,operatingsystem_parameters+4
.set operatingsystem_parameter_argv,operatingsystem_parameters+8
//.section .threadvar,"aw",@nobits
.comm ___fpc_threadvar_offset,4
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