[PATCH]: Fix TUI disassembling scrolling

[Stephane Carrez]

Hi!

To scroll backward in the TUI disassembling window, the TUI computes
the starting address by subtracting constant offsets (4).  This works only if
each instruction is of the same size.  For i386 and 68HC11 where we can
have instructions of 1 or several bytes, this results in random position
of the window.

This patch solves this by disassembling from the beginning of the/a function
and until we obtain the backward scroll (that is last disassembly line of
the window corresponds to the current top address).

Committed on mainline.

	Stephane

2002-08-28  Stephane Carrez  <stcarrez@nerim.fr>

	* tuiDisassem.c (tui_disassemble): New function to disassemble
	several lines in a buffer.
	(tui_find_disassembly_address): New function to search backward
	or forward a disassembly line.
	(tuiSetDisassemContent): Use tui_disassemble to obtain the real
	content and format it in the window.
	(tuiShowDisassemAndUpdateSource): Remove unused locals.
	(tuiVerticalDisassemScroll): Use tui_find_disassembly_address to
	obtain the address to disassemble for the scrolling.
	* tuiDisassem.h (tuiGetBeginAsmAddress): Update.
	* tuiSourceWin.c (tuiUpdateSourceWindowAsIs): Don't pass symtab.

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