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2006-07-05 Shaun Jackman <sjackman@gmail.com> 

* arm/linux-crt0.S: Remove file.
	* arm/linux-crt0.c: New file. Supports PIC code.
This commit is contained in:
Shaun Jackman 2006-07-05 15:24:30 +00:00
parent 7bfe2409a0
commit 0b6bb78b34
3 changed files with 44 additions and 46 deletions
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5
libgloss/ChangeLog
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@ -1,3 +1,8 @@
2006-07-05 Shaun Jackman <sjackman@gmail.com>
* arm/linux-crt0.S: Remove file.
* arm/linux-crt0.c: New file. Supports PIC code.
2006-07-04 Shaun Jackman <sjackman@gmail.com> 2006-07-04 Shaun Jackman <sjackman@gmail.com>
* arm/linux-syscalls0.S (ftruncate, getegid, geteuid, getgid, * arm/linux-syscalls0.S (ftruncate, getegid, geteuid, getgid,

46
libgloss/arm/linux-crt0.S
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/** Linux startup code for the ARM processor.
* Written by Shaun Jackman <sjackman@gmail.com>.
* Copyright 2006 Pathway Connectivity
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
.global _start
.type _start, %function
_start:
#if __thumb__
/* Switch to Thumb mode. */
adr r0, _start_thumb+1
bx r0
.size _start, .-_start
.global _start_thumb
.thumb_func
_start_thumb:
#endif
#if 0
/* Clear the BSS. This task is normally handled by the kernel. */
ldr r0, =__bss_start
mov r1, #0
ldr r2, =_end
sub r2, r2, r0
bl memset
#endif
pop {r0} @ argc
mov r1, sp @ argv
lsl r2, r0, #2
add r2, r1
add r2, #4 @ envp
ldr r3, =environ
str r2, [r3]
bl main
bl exit
b .
#if __thumb__
.size _start_thumb, .-_start_thumb
#else
.size _start, .-_start
#endif

39
libgloss/arm/linux-crt0.c Normal file
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/** Linux startup code for the ARM processor.
* Written by Shaun Jackman <sjackman@gmail.com>.
* Copyright 2006 Pathway Connectivity
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
#include <stdlib.h>
#include <unistd.h>
static int _main(int argc, char *argv[]) __attribute__((noreturn));
#if __thumb__
asm("\n"
".code 32\n"
".global _start\n"
".type _start, %function\n"
"_start:\n"
"\tadr r0, _start_thumb+1\n"
"\tbx r0\n"
".size _start, .-_start\n");
__attribute__((naked, used))
static void _start_thumb(void)
#else
__attribute__((naked))
void _start(void)
#endif
{
register int *sp asm("sp");
_main(*sp, (char **)(sp + 1));
}
static int _main(int argc, char *argv[])
{
environ = argv + argc + 1;
exit(main(argc, argv, environ));
}