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Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
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Better to not put return under condition. It was bad.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
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In case if label is local and exceed maximum allowed length
we get NULL dereference. Fix it and warn a user about an accident.
Note that we don't print identifier itself since we know it's too
big. Line number of error is enough.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
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Added a format attribute to nasm_error (only for GCC) and
used the resulting warnings to fix some format strings.
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We never set ofmt and errfunc to anything but the global values.
Dropping them from the label definition function command line
simplifies the code.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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*To the best of my knowledge*, we now have authorization from everyone
who has significantly contributed to NASM in the past. As such,
change the license to the 2-clause BSD license.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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BR 677841 was fixed backwards, with a reverse condition. Correct the
direction of the fix, and add an assert for the overflow condition.
Note: the bug was non-manifest in previous build, so this is not a
security issue.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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Add copyright headers to the *.c/*.h files in the main directory. For
files where I'm sure enough that we have all the approvals, I have
given them the 2-BSD license, the others have been given the "LGPL for
now" license header. Most of them can probably be changed after
auditing.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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When optimizing, we have to keep track of common labels, since a
common symbol cannot be optimized -- only the linker will know where
it will end up. In that sense it is similar to an EXTERN symbol.
Thus, allow them to be entered in the symbol table but make sure we
don't holler too hard on redefinition.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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This experimental feature needs to be tested for
all output formats which recognize global symbols.
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Module labels.c has code to issue error message when global
directive appears after symbol definition, but the test condition
was incorrectly punctuated.
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Change global_offset_changed from bool to int so that
progress of convergence can be monitored. If change count
does not decrease from previous pass, increment stall counter.
If stall count reaches threshold, terminate assembly
with error message.
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Allow redefine_label to update segment as well as offset,
thereby fixing bug which required EQU to be on the
critical expression list.
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struct hash_table, a fixed-sized structure, is now allocated by the
caller. This lets us integrate it into the Context structure, thus
avoiding an additional dynamically allocated object for no good
reason.
Add some minor code collapsing: make it more obvious that all that
differs is a pointer value, rather than relying on the compiler to do
tail merging.
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Normally, contexts aren't used with a large number of macros, but in
case someone does, do use hash tables for those as well. This
simplifies the code somewhat, since *all* handling of macros is now
done via hash tables.
Future note: consider if it wouldn't be better to allow struct
hash_table to be allocated by the caller, instead of being allocated
by the hash table routine.
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Add new function "local_scope" to label subsystem to
return the previous non-local label for a given local label,
and invoke this funcion in eval.c to display the fully
qualified name in the "not defined" error message.
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Don't accept -1 as an odd numbered segment
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"Stealth whitespace" makes it harder to read diffs, and just generally
cause unwanted weirdness. Do a source-wide pass to get rid of it.
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Proper use of bool and enum makes code easier to debug. Do more of
it. In particular, we really should stomp out any residual uses of
magic constants that aren't enums or, in some cases, even #defines.
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Both C and C++ have "bool", "true" and "false" in lower case; C
requires <stdbool.h> for this, in C++ it is an inherent type built
into the compiler. Use those instead of the old macros; emulate with
a simple typedef enum if unavailable.
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Concentrate compiler dependencies to compiler.h; make sure compiler.h
is included first in every .c file (since some prototypes may depend
on the presence of feature request macros.)
Actually use the conditional inclusion of various functions (totally
broken in previous releases.)
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Switch the preprocessor over to using the hash table library. On my
system, this improves the runtime of the output of test/pref/macro.pl
from over 600 seconds to 7 seconds.
Macros have an odd mix of case-sensitive and case-insensitive
behaviour, plus there are matching parameters for arguments, etc. As
a result, we use case-insensitive hash tables and use a linked list to
store all the possible isomorphs.
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In converting the label system over to the new hash table library,
accidentally broke local labels by prepending the prefix twice. Fix.
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Use the new hash table function library to store labels. When
compiling on my 64-bit system, it reduces the assembly time for the
output of test/perf/label.pl from 73 to 7 seconds.
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overflow exploits.
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for a single ID token
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