This is a quick look at what an assembler run looks like.
read_a_source_file function reads in the file
and parses it. The global variable input_line_pointer points to the
current text; it is guaranteed to be correct up to the end of the line, but not
farther.
colon function, and
isolates the first word. If it looks like a pseudo-op, the word is looked up
in the pseudo-op hash table po_hash and dispatched to a pseudo-op
routine. Otherwise, the target dependent md_assemble routine is called
to parse the instruction.
frag_more to get space to store it in.
fix_new or
fix_new_exp.
write_object_file routine is
called. It assigns addresses to all the frags (relax_segment), resolves
all the fixups (fixup_segment), resolves all the symbol values (using
resolve_symbol_value), and finally writes out the file (in the
BFD_ASSEMBLER case, this is done by simply calling bfd_close).
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