"functions" that call down to the module level. Doesn't really change the
internal complexities, just makes it easier to read and write code that
uses it.
svn path=/trunk/yasm/; revision=1080
As yasm has evolved, various minor additions have been made to libyasm to
support the new features. These minor additions have accumulated, and
some contain significant redundancies. In addition, the core focus of
yasm has begun to move away from the front-end commandline program "yasm"
to focusing on libyasm, a collection of reusable routines for use in all
sorts of programs dealing with code at the assembly level, and the modules
that provide specific features for parsing such code.
This libyasm/module update focuses on cleaning up much of the cruft that
has accumulated in libyasm, standardizing function names, eliminating
redundancies, making many of the core objects more reusable for future
extensions, and starting to make libyasm and the modules thread-safe by
eliminating static variables.
Specific changes include:
- Making a symbol table data structure (no longer global). It follows a
factory model for creating symrecs.
- Label symbols now refer only to bytecodes; bytecodes have a pointer to
their containing section.
- Standardizing on *_create() and *_destroy() for allocation/deallocation.
- Adding a standardized callback mechanism for all data structures that
allow associated data. Allowed the removal of objfmt and
dbgfmt-specific data callbacks in their interfaces.
- Unmodularizing linemgr, but allowing multiple linemap instances (linemgr
is now renamed linemap).
- Remove references to lindex; all virtual lines (from linemap) are now
just "line"s.
- Eliminating the bytecode "type" enum, instead adding a standardized
callback mechanism for custom (and standard internal) bytecode types.
This will make it much easier to add new bytecodes, and eliminate the
possibility of type collisions. This also allowed the removal of the
of_data and df_data bytecodes, as objfmts and dbgfmts can now easily
implement their own bytecodes, and the cleanup of arch's bytecode usage.
- Remove the bytecodehead and sectionhead pseudo-containers, instead
making true containers: section now implements all the functions of
bytecodehead, and the new object data structure implements all the
functions of sectionhead.
- Add object data structure: it's a container that contains sections, a
symbol table, and a line mapping for a single object. Every former use
of sectionhead now takes an object.
- Make arch interface and all standard architectures thread-safe:
yasm_arch_module is the module interface; it contains a create()
function that returns a yasm_arch * to store local yasm_arch data; all
yasm_arch_module functions take the yasm_arch *.
- Make nasm parser thread-safe.
To be done in phase 2: making other module interfaces thread-safe. Note
that while the module interface may be thread-safe, not all modules may be
written in such a fashion (hopefully all the "standard" ones will be, but
this is yet to be determined).
svn path=/trunk/yasm/; revision=1058
expression line number instead of the start line number (which may be 0,
which isn't nearly as useful as the expression line number).
svn path=/trunk/yasm/; revision=1016
intnum folding on and leveling performed would result in terms getting copied
over due to hitting o != i case after i++ but no o++.
Bugzilla: #12.
Reported by: meor@softhome.net
svn path=/trunk/yasm/; revision=1009
problem, adding this required adding some fields to x86_jmprel (now a
misnomer, as FAR jumps are absolute) to save the far opcode, and additional
support in libyasm's yasm_expr_* to properly handle the YASM_EXPR_SEGOFF
operator.
svn path=/trunk/yasm/; revision=954
WRT, and ':' (SEGOFF) usage. This change also brings the yasm_intnum_calc()
interface in line with the yasm_floatnum_calc() interface.
Note: This may not be the final place we want these error messages to reside,
but the lindex addition should remain for the sake of consistency.
svn path=/trunk/yasm/; revision=953
- Move config.h and util.h from libyasm (and installed libyasm) to top level.
- Move yasm_* functions from util.h to coretype.h.
- Remove a number of autoconf-related YASM_*_INTERNAL options from libyasm.h.
- Rename YASM_INTERNAL to YASM_LIB_INTERNAL; it now actually means what the
comment describes: enables definitions that violate the yasm_* namespace.
While we're at it, no longer define YASM_LIB_INTERNAL from yasm frontend, so
it's closer to what a real typical libyasm-using application would look like.
svn path=/trunk/yasm/; revision=944
libintl dependency in modules.
Also standardize initialize() and cleanup() functions.
Move replace_extension() from file.c to main.c.
Clean up some extern variable declarations in various places (particularly
nasm-compatible parser).
svn path=/trunk/yasm/; revision=792
the line index. Fixes some minor line number/error message nits due to
incorrect usage of line_index in old global variable method.
svn path=/trunk/yasm/; revision=787
expr_level_tree(). This fixes negative equ's and probably other issues.
This also makes expr_simplify() a macro pointing to expr_level_tree().
svn path=/trunk/yasm/; revision=778
expr_level_tree(): Call recursively after calling expr_xform_bc_dist instead
of just calling expr_level_op, which wasn't simplifying the whole tree
properly.
svn path=/trunk/yasm/; revision=728
/distances/ between bytecodes in a section using bc_calc_dist() functions (a
"typical" one is provided for most occasions). expr_expand_labelequ() is gone,
as its functionality is integrated into expr_simplify(). Currently these
changes break most bin objfmt output, as it doesn't know how to resolve
absolute labels yet. Also, very preliminary expr support for :, SEG, and WRT
operators has been added (part of Bug#2). Several other minor bug fixes.
svn path=/trunk/yasm/; revision=718
intnum_new_int. Currently only just calls intnum_new_uint with a cast, but
eventually there may be a better way of handling signed numbers.
svn path=/trunk/yasm/; revision=708
Bugzilla Bug#3. Not all instructions are parsed yet, so this is actually a
minor feature regression from the user side, but this commit lays the framework
for much easier additions of new assembler syntaxes and architectures. The
re2c tool is now used to generate the lexers, as it's much more flexibly
function-oriented than lex.
- nasm-bison.y is a repocopy+modify of nasm/bison.y.in.
- x86arch.h now includes all of x86-int.h
svn path=/trunk/yasm/; revision=670
- expr can now negate floatnums
- bin objfmt output_expr now correctly outputs all sizes of integers and
does a check for floating point containing exprs before complaining about
external references. Also checks for properly sized floatnum output with
an ErrorAt instead of an InternalError.
svn path=/trunk/yasm/; revision=618
with regards to resolve_label().
MAJOR FIXME: The tobytes() pass acts like a final optimization pass. This
causes internal errors because of length mismatches (optimized to shorter len).
svn path=/trunk/yasm/; revision=521
just assigned the pointer: but the symrec is deleted (if it's not in the symbol
table) when the expr is deleted. Thus, we need to create a copy of the symrec
instead of just reusing the same value if it's going to be deleted later. This
trickles down to objfmt to copy the objfmt-local data.
svn path=/trunk/yasm/; revision=467
"index". This fixes some problems with assumptions made by various parts of
the code that are invalidated when the line number doesn't always increase (eg.
when the NASM %line directive is used).
Speed fixes are needed to the implementation of the line_* functions in
globals.c before this is finished.
svn path=/trunk/yasm/; revision=424
FILE *'s to print to somewhere other than stdout, and the formatting is
improved through the use of a global indent_level.
Changes to main() include the ability to specify an output file.
svn path=/trunk/yasm/; revision=357
This is actually worthwhile; I found and fixed a few bugs/edge cases while
doing this.
For more information on LCLint, see <http://lclint.cs.virginia.edu/>.
svn path=/trunk/yasm/; revision=335
sections of C files. Also remove IdPath from top comment in files where
RCSID() is used. Move RCSID() to immediately after util.h include.
svn path=/trunk/yasm/; revision=313
Peter Johnson