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#=========================================================================
# crt0.S : Entry point for RISC-V user programs
#=========================================================================
.text
.global _start
_start:
la gp, _gp # Initialize global pointer
# clear the bss segment
la t0, _fbss
la t1, _end
1:
#ifdef __riscv64
sd zero,0(t0)
addi t0, t0, 8
#else
sw zero,0(t0)
addi t0, t0, 4
#endif
bltu t0, t1, 1b
la a0, __libc_fini_array # Register global termination functions
call atexit # to be called upon exit
call __libc_init_array # Run global initialization functions
lw a0, 0(sp) # a0 = argc
addi a1, sp, _RISCV_SZPTR/8 # a1 = argv
li a2, 0 # a2 = envp = NULL
call main
jump exit
.global _init
.global _fini
_init:
_fini:
# These don't have to do anything since we use init_array/fini_array.
ret
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