forked from Firmware/Firmwares
59 lines
828 B
ArmAsm
59 lines
828 B
ArmAsm
// See LICENSE for license details.
|
|
|
|
.section .init
|
|
.globl _start
|
|
.type _start,@function
|
|
|
|
_start:
|
|
.option push
|
|
.option norelax
|
|
la gp, __global_pointer$
|
|
.option pop
|
|
la sp, _sp
|
|
|
|
/* Load data section */
|
|
la a0, _data_lma
|
|
la a1, _data
|
|
la a2, _edata
|
|
bgeu a1, a2, 2f
|
|
1:
|
|
lw t0, (a0)
|
|
sw t0, (a1)
|
|
addi a0, a0, 4
|
|
addi a1, a1, 4
|
|
bltu a1, a2, 1b
|
|
2:
|
|
|
|
/* Clear bss section */
|
|
la a0, __bss_start
|
|
la a1, _end
|
|
bgeu a0, a1, 2f
|
|
1:
|
|
sw zero, (a0)
|
|
addi a0, a0, 4
|
|
bltu a0, a1, 1b
|
|
2:
|
|
|
|
/* Call global constructors */
|
|
#ifdef HAVE_INIT_FINI
|
|
la a0, __libc_fini_array
|
|
call atexit
|
|
call __libc_init_array
|
|
#endif
|
|
#ifndef __riscv_float_abi_soft
|
|
/* Enable FPU */
|
|
li t0, MSTATUS_FS
|
|
csrs mstatus, t0
|
|
csrr t1, mstatus
|
|
and t1, t1, t0
|
|
beqz t1, 1f
|
|
fssr x0
|
|
1:
|
|
#endif
|
|
|
|
/* argc = argv = 0 */
|
|
li a0, 0
|
|
li a1, 0
|
|
call main
|
|
tail _exit
|