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- /*
- * Copyright (C) 2016 Andes Technology, Inc.
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- /* Startup code compliant to the ELF NDS32 ABI */
- #include <sys/regdef.h>
- #include <features.h>
- #define BP_SYM(name) name
- /* We need to call:
- __uClibc_main (int (*main) (int, char **, char **), int argc,
- char **argv, void (*init) (void), void (*fini) (void),
- void (*rtld_fini) (void), void *stack_end)
- */
- .text
- .globl _start
- .type _start,@function
- .type _init,@function
- .type _fini,@function
- #ifndef __UCLIBC_CTOR_DTOR__
- .weak _init
- .weak _fini
- #endif
- .type main,@function
- .type __uClibc_main,@function
- #ifdef SHARED
- .pic
- 1:
- ret
- #endif
- _start:
- movi $fp, 0 ! clear FP
- lwi $r1, [$sp + 0] ! r1 = argc
- addi $r2, $sp, 4 ! r2 = argv
- /* align sp to 8-byte boundary */
- movi $r0, -8
- and $sp, $sp, $r0
- addi $r6, $sp, 0 ! r6 = stack top
- #ifdef SHARED
- /* set gp register */
- mfusr $r15, $PC
- sethi $gp, HI20(_GLOBAL_OFFSET_TABLE_+4)
- ori $gp, $gp, LO12(_GLOBAL_OFFSET_TABLE_ + 8)
- add $gp, $r15, $gp
- la $r3, _init@GOTOFF
- la $r4, _fini@GOTOFF
- la $r0, main@GOT
- /* push everything to stack, r5 is rtld_fini and r7 is garbage */
- pushm $r0, $r7
- /* now start it up */
- bal __uClibc_main@PLT
- /* should never get here */
- bal abort@PLT
- #else
- la $gp, _SDA_BASE_ ! init GP for small data access
- la $r3, _init
- la $r4, _fini
- la $r0, main
- /* push everything to stack, r5 is rtld_fini and r7 is garbage */
- pushm $r0, $r7
- /* now start it up */
- bal __uClibc_main
- /* should never get here */
- bal abort
- #endif
- ret
- /* 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
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