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Diffstat (limited to 'libgloss/arm/linux-crt0.S')
| -rw-r--r-- | libgloss/arm/linux-crt0.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libgloss/arm/linux-crt0.S b/libgloss/arm/linux-crt0.S new file mode 100644 index 000000000..b3ba5bd0d --- /dev/null +++ b/libgloss/arm/linux-crt0.S @@ -0,0 +1,46 @@ +/** 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 |