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Annotation of researchv9/libc/csu/crt0.s, revision 1.1.1.1

1.1       root        1: # C runtime startoff
                      2: 
                      3:        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:        subql   #8,sp
                     14:        movl    sp@(8),sp@      | argc
                     15:        lea     sp@(12),a0
                     16:        movl    a0,sp@(4)       | argv
                     17:        movl    a0@,d1
                     18: L1:
                     19:        tstl    a0@+            | null args term ?
                     20:        bne     L1
                     21:        cmpl    a0,d1           | end of 'env' or 'argv' ?
                     22:        blt     L2
                     23:        tstl    a0@-            | envp's are in list
                     24: L2:
                     25:        movl    a0,sp@(8)       | env
                     26:        movl    a0,_environ     | indir is 0 if no env ; not 0 if env
                     27:        jsr     _main
                     28:        addql   #8,sp
                     29:        movl    d0,sp@-
                     30:        jsr     _exit
                     31:        addql   #4,sp
                     32:        pea     exit
                     33:        trap    #0
                     34: #
                     35:        .data
                     36: _environ:      .long   0

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