/* crt0.S for the sparclet 701.
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/* crt0.S for the sparclet 701.
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At the moment, all the necessary syscalls are here.
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At the moment, all the necessary syscalls are here.
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Convention has them in a separate file but libgloss is still in
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Convention has them in a separate file but libgloss is still in
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too much flux. */
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too much flux. */
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.text
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.text
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.global start
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.global start
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start:
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start:
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! zero bss
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! zero bss
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sethi %hi(_end), %o1
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sethi %hi(_end), %o1
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or %o1, %lo(_end), %o1
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or %o1, %lo(_end), %o1
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sethi %hi(_edata), %o0
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sethi %hi(_edata), %o0
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or %o0, %lo (_edata), %o0
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or %o0, %lo (_edata), %o0
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sub %o1, %o0, %o1
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sub %o1, %o0, %o1
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Lzero_bss:
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Lzero_bss:
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subcc %o1, 4, %o1
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subcc %o1, 4, %o1
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clr [%o0]
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clr [%o0]
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bne Lzero_bss
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bne Lzero_bss
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add %o0, 4, %o0
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add %o0, 4, %o0
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! set up argc, argv, envp (?)
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! set up argc, argv, envp (?)
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ld [%sp+64], %o0
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ld [%sp+64], %o0
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sll %o0, 2, %o2
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sll %o0, 2, %o2
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add %o2, 4, %o2
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add %o2, 4, %o2
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add %sp, 68, %o1
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add %sp, 68, %o1
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add %o1, %o2, %o2
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add %o1, %o2, %o2
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sethi %hi(_environ), %o3
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sethi %hi(_environ), %o3
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st %o2, [%o3+%lo(_environ)]
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st %o2, [%o3+%lo(_environ)]
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! call main, exit
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! call main, exit
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call _main
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call _main
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sub %sp, 32, %sp
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sub %sp, 32, %sp
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call _exit
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call _exit
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nop
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nop
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! void _exit (int rc)
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! void _exit (int rc)
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.global __exit
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.global __exit
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__exit:
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__exit:
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mov 1, %g1
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mov 1, %g1
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ta 0
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ta 0
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! If that does not work, just loop forever.
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! If that does not work, just loop forever.
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Lloop_forever:
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Lloop_forever:
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b Lloop_forever
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b Lloop_forever
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nop
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nop
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! int _open (char *, int)
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! int _open (char *, int)
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.global _open
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.global _open
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_open:
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_open:
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mov 5, %g1
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mov 5, %g1
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ta 0
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ta 0
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bcc Lnoerr
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bcc Lnoerr
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nop
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nop
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b Lcerror
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b Lcerror
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nop
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nop
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! int _close (int)
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! int _close (int)
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.global _close
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.global _close
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_close:
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_close:
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mov 6, %g1
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mov 6, %g1
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ta 0
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ta 0
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bcc Lnoerr
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bcc Lnoerr
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nop
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nop
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b Lcerror
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b Lcerror
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nop
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nop
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! int read (int, char *, int)
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! int read (int, char *, int)
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.global _read
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.global _read
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_read:
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_read:
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mov 3, %g1
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mov 3, %g1
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ta 0
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ta 0
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bcc Lnoerr
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bcc Lnoerr
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nop
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nop
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b Lcerror
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b Lcerror
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nop
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nop
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! int write (int, char *, int)
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! int write (int, char *, int)
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.global _write
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.global _write
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_write:
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_write:
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mov 4, %g1
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mov 4, %g1
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ta 0
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ta 0
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bcc Lnoerr
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bcc Lnoerr
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nop
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nop
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b Lcerror
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b Lcerror
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nop
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nop
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Lnoerr:
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Lnoerr:
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retl
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retl
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nop
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nop
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Lcerror:
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Lcerror:
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sethi %hi(__impure_ptr), %g1
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sethi %hi(__impure_ptr), %g1
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st %o0, [%g1+%lo(__impure_ptr)]
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st %o0, [%g1+%lo(__impure_ptr)]
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retl
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retl
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mov -1, %o0
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mov -1, %o0
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