exception handling. There are now two layers an error or warning goes
through before it hits the user: first an error is logged via
yasm_error_set() (or yasm_warn_set() for a warning). Only one error may
be set, whereas multiple warnings can be set (yasm_warn_set maintains a
linked list). Then, calling yasm_errwarn_propagate() propagates any error
and/or warning(s) to an errwarns structure and associates the
errors/warnings with a line number at that time; this call also clears the
pending errors/warnings and allows new ones to be set. The propagate
function can safely be called when there are no pending error/warnings.
In addition, there are some helper errwarn functions that allow clearing of
an error/warning without propagating, getting it separately, etc.
Still yet to be done: changing most/all uses of yasm_internal_error() into
yasm_error_set(YASM_ERROR_ASSERTION).
The main advantage this change has is making libyasm functions feel much
more library like, and separating the user code line numbers from the inner
function error handling (e.g. intnum create functions only needed the line
number to trigger errors; this is no longer required).
The set/propagate/etc functions use global data structures to avoid passing
around a pointer to every function. This would need to be made thread-local
data in a threaded app. Errwarns containers (that keep associated line
numbers) are no longer global, so multiple source streams can be processed
separately with no conflict (at least if there's only a single thread of
execution).
svn path=/trunk/yasm/; revision=1521
yasm_intnum_get_sized().
* intnum.h (yasm_intnum_create_sized): Prototype.
* yasm.pyx: Bring in _PyLong_From/AsByteArray functions.
* intnum.pyx: Use yasm_intnum_create_sized(), etc to implement full 128-bit
number handling.
* intnum.c (yasm_intnum_get_str): Return strings in hex rather than in
decimal.
svn path=/trunk/yasm/; revision=1488
decreases bloat and more importantly makes it possible to use >32-bit values
in the preprocessor.
This has NOT been heavily tested, so there may easily be bugs. I've not yet
decided whether to merge this to 0.5.0 final for this reason.
Inspired by: Jason Chen <jchen@centtech.com> patches to use "long long"
rather than "long" in the preprocessor to enable >32-bit values.
* coretype.h (yasm_op): Add XNOR, LXOR, LXNOR, LNOR.
* intnum.c (yasm_intnum_calc): Calculate the above.
* expr.c (expr_is_constant, expr_can_destroy_int_left)
(expr_can_destroy_int_right, ...): Actually handle logical operations,
including the new ones.
* intnum.c (yasm_intnum_get_str): New; gets a signed decimal string
representation of an intnum.
* intnum.h (yasm_intnum_get_str): Prototype.
* nasmlib.c (nasm_strcat): Change parameters to const.
* nasmlib.h (nasm_strcat): Update prototype.
* nasm-preproc.c (nasm_preproc_input): Close a memory leak.
* nasm.h: Clean out a lot of cruft we don't use.
(tokenval): Change t_integer and t_inttwo to yasm_intnums.
(evalfunc): Remove fwref and hints parameters (cleanup), change return value
to yasm_expr.
* nasm-eval.c: Massively rewrite to just call appropriate yasm_expr creation
functions rather than calculating the value here. Overall recursive descent
parsing structure is unchanged.
* nasmlib.c: Remove a lot of now-unused functions.
(nasm_readnum): Use yasm_intnum functions and return that.
(nasm_readstrnum): Likewise.
* nasmlib.h: Update prototypes.
* nasm-pp.c: Change to use intnum/expr as necessary.
* nasm-preproc.c (nasm_preproc_destroy): Don't call nasm_eval_cleanup,
it's been deleted.
* nasmpp-bigint.asm: New test for >32-bit preproc values.
* ifcritical-err.errwarn: The new code doesn't generate a duplicate warning.
svn path=/trunk/yasm/; revision=1485
* intnum.h (yasm_intnum_check_size): Remove reference to nonexistent param
"is_signed" (this was replaced a long time ago with the rangetype param).
svn path=/trunk/yasm/; revision=1368
signed LEB128-encoded numbers straight from long values (rather than going
through intnum).
(yasm_get_uleb128, yasm_size_uleb128): Likewise, for unsigned LEB128.
* intnum.c (get_leb128, size_leb128): Move most of functionality here from:
(yasm_intnum_get_leb128, yasm_intnum_size_leb128): Here (refactor).
(yasm_get_sleb128, yasm_size_sleb128, yasm_get_uleb128, yasm_size_uleb128):
Implement using refactored functionality.
svn path=/trunk/yasm/; revision=1366
is needed for the GAS .uleb128 and .sleb128 directives.
* intnum.c (yasm_intnum_sign): New signedness discovery function.
* intnum.h (yasm_intnum_sign): Prototype.
* intnum.c (yasm_intnum_get_leb128, yasm_intnum_size_leb128): New.
* intnum.h (yasm_intnum_get_leb128, yasm_intnum_size_leb128): Prototype.
* leb128_test.c: New test for intnum-level LEB128 functions.
* bytecode.c (bytecode_leb128): New bytecode and supporting functions.
(yasm_bc_create_leb128): New creation function.
* bytecode.h (yasm_bc_create_leb128): Prototype.
* gas-token.re: Recognize .uleb128 and .sleb128.
* gas-bison.y: Ditto.
(gas_define_leb128): New.
* leb128.asm: New test for GAS .uleb128 and .sleb128 directives.
svn path=/trunk/yasm/; revision=1287
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
use of configure.ac's --enable-warnerror, which was set up to disable
conversion errors due to flex's warning-prone generated code. As we no
longer use flex, fix configure.ac to not disable conversion errors.
svn path=/trunk/yasm/; revision=1018
- Switch to bit-based output, including shift capability
- This means the standard intnum output functions can be used for non-byte
oriented archs like LC-3b (implemented)
- Default out of range (overflow) warnings for intnum (bugzilla bug 14)
- Change floating point overflow/underflow errors to warnings
To do (hooks but not implemented):
- Shifting floatnums into destination
- Floatnum destinations larger than floatnum value
- Big endian support for intnum and floatnum
Related simultaneous changes:
- Use bc instead of ep in objfmt output_expr() functions; while bc->line
should == (*ep)->line, in case they differ, we want to use the bc->line
so as not to confuse users.
- lc3b-mp22NC test was not properly offsetting the accessed variables, but
since the variable "sections" started at an aligned offset, the output
was actually correct. The new intnum warnings uncovered this issue, so
fix code to be correct (and not generate warnings).
svn path=/trunk/yasm/; revision=1017
all <32 bit positive numbers are collapsed into ul form.
yasm_intnum_is_neg1(): fix bug which would equate 0xffffffff as -1.
svn path=/trunk/yasm/; revision=1010
yasm_intnum_get_int(): Properly overflow and handle INTNUM_UL properly
Elsewhere: use wordptr instead of intptr.
yasm_intnum_check_size() is still broken, but the interface for this will be
changing soon, so fix it then.
svn path=/trunk/yasm/; revision=1008
- Up internal format size to 128 bit.
- Use full internal format size for all calculations.
- Always store negative numbers using full internal size
(avoids 0xffffffff == -1?? issue)
This fixes many inconsistencies in handling of >32-bit intnums.
svn path=/trunk/yasm/; revision=995
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
When -Werror is used, disable -Wconversion, because flex-generated code causes
warnings when calling fwrite() and fread().
svn path=/trunk/yasm/; revision=873
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
arch. This will also simplify other objfmt expr output functions. Change
file functions to use bits instead of byte/short/long, and create both little
and big endian versions. This name change caused changes in several other
files.
svn path=/trunk/yasm/; revision=747
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
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