mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 02:39:40 +01:00
104 lines
2.3 KiB
ActionScript
104 lines
2.3 KiB
ActionScript
/*
|
|
At this entry point, most registers' values are unspecified, except:
|
|
|
|
a1 Contains a function pointer to be registered with `atexit'.
|
|
This is how the dynamic linker arranges to have DT_FINI
|
|
functions called for shared libraries that have been loaded
|
|
before this code runs.
|
|
|
|
sp The stack contains the arguments and environment:
|
|
0(sp) argc
|
|
4(sp) argv[0]
|
|
...
|
|
(4*argc)(sp) NULL
|
|
(4*(argc+1))(sp) envp[0]
|
|
...
|
|
NULL
|
|
*/
|
|
|
|
.text
|
|
.globl _start
|
|
.type _start,#function
|
|
_start:
|
|
/* Clear the frame pointer since this is the outermost frame. */
|
|
mov fp, #0
|
|
ldmia sp!, {a2}
|
|
|
|
/* Pop argc off the stack and save a pointer to argv */
|
|
ldr ip,=operatingsystem_parameter_argc
|
|
ldr a3,=operatingsystem_parameter_argv
|
|
str a2,[ip]
|
|
|
|
/* calc envp */
|
|
add a2,a2,#1
|
|
add a2,sp,a2,LSL #2
|
|
ldr ip,=operatingsystem_parameter_envp
|
|
|
|
str sp,[a3]
|
|
str a2,[ip]
|
|
|
|
ldr r1,=_etext /* Initialize gmon */
|
|
ldr r0,=_start
|
|
bl monstartup
|
|
ldr r0,=_mcleanup
|
|
bl atexit
|
|
|
|
/* Save initial stackpointer */
|
|
ldr ip,=__stkptr
|
|
str sp,[ip]
|
|
/* align sp again to 8 byte boundary, needed by eabi */
|
|
sub sp,sp,#4
|
|
|
|
/* Let the libc call main and exit with its return code. */
|
|
bl PASCALMAIN
|
|
|
|
.globl _haltproc
|
|
.type _haltproc,#function
|
|
_haltproc:
|
|
/* r0 contains exitcode */
|
|
swi 0x900001
|
|
b _haltproc
|
|
|
|
.globl _haltproc_eabi
|
|
.type _haltproc_eabi,#function
|
|
_haltproc_eabi:
|
|
/* r0 contains exitcode */
|
|
mov r7,#248
|
|
swi 0x0
|
|
b _haltproc_eabi
|
|
|
|
/* Define a symbol for the first piece of initialized data. */
|
|
.data
|
|
.globl __data_start
|
|
__data_start:
|
|
.long 0
|
|
.weak data_start
|
|
data_start = __data_start
|
|
|
|
.bss
|
|
.comm __stkptr,4
|
|
|
|
.comm operatingsystem_parameter_envp,4
|
|
.comm operatingsystem_parameter_argc,4
|
|
.comm operatingsystem_parameter_argv,4
|
|
|
|
.section ".comment"
|
|
.byte 0
|
|
.ascii "generated by FPC http://www.freepascal.org\0"
|
|
|
|
/* We need this stuff to make gdb behave itself, otherwise
|
|
gdb will chokes with SIGILL when trying to debug apps.
|
|
*/
|
|
.section ".note.ABI-tag", "a"
|
|
.align 4
|
|
.long 1f - 0f
|
|
.long 3f - 2f
|
|
.long 1
|
|
0: .asciz "GNU"
|
|
1: .align 4
|
|
2: .long 0
|
|
.long 2,0,0
|
|
3: .align 4
|
|
|
|
.section .note.GNU-stack,"",%progbits
|