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Annotation of researchv10no/libc/csu/crt0.s, revision 1.1

1.1     ! root        1: # C runtime startoff
        !             2: 
        !             3:        .set    exit,1
        !             4: .globl _exit
        !             5: .globl start
        !             6: .globl _main
        !             7: .globl _environ
        !             8: 
        !             9: #
        !            10: #      C language startup routine
        !            11: 
        !            12: start:
        !            13:        .word   0x0000
        !            14:        subl2   $8,sp
        !            15:        movl    8(sp),(sp)  #  argc
        !            16:        movab   12(sp),r0
        !            17:        movl    r0,4(sp)  #  argv
        !            18: L1:
        !            19:        tstl    (r0)+  #  null args term ?
        !            20:        bneq    L1
        !            21:        cmpl    r0,*4(sp)  #  end of 'env' or 'argv' ?
        !            22:        blss    L2
        !            23:        tstl    -(r0)  # envp's are in list
        !            24: L2:
        !            25:        movl    r0,8(sp)  #  env
        !            26:        movl    r0,_environ  #  indir is 0 if no env ; not 0 if env
        !            27:        calls   $3,_main
        !            28:        pushl   r0
        !            29:        calls   $1,_exit
        !            30:        chmk    $exit
        !            31: #
        !            32:        .data
        !            33: _environ:      .space  4

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