Commit Graph

17 Commits

Author SHA1 Message Date
H. Peter Anvin
6fdf710824 eval: 'i' and 'j' are names normally used for iteration variables
Single letter variables in the sequence i, j, k... are normally used
for integer-valued iterators. Rename the token-type variable 'tt', and
use 'tto' (token type, old) when the value is saved across a scan.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-11-28 10:33:16 -08:00
H. Peter Anvin
99fcda0e76 expr: wrap the call to the scanner
*Every* call to the scanner is of the form i = scan(scpriv, tokval).
Wrap that in a static function instead of duplicating the code over
and over.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-11-28 10:27:30 -08:00
H. Peter Anvin
ef427b3fa1 eval: drop passing (critical) as an argument
There is no point in passing (critical) as an argument when
we alredy rely on a bunch of static variables.  If eval needs to be
reentrant, we should instead have something like "struct eval_state"
and pass a pointer to that as an argument.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-11-28 10:19:50 -08:00
H. Peter Anvin
ca605a3c38 expr: allow any expression to contain relational operators
There is absolutely no reason not to allow relational operators in
arbitrary contexts. and doing so can be quite useful.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-11-28 10:13:48 -08:00
H. Peter Anvin
a0ed5b3ffa Merge branch 'master' of ssh://repo.or.cz/nasm 2018-11-28 09:56:15 -08:00
Cyrill Gorcunov
f7b44f6092 Merge branch 'nasm-2.14.xx'
* nasm-2.14.xx: (83 commits)
  NASM 2.14rc16
  doc: Update changes
  preproc: expand_smacro -- Fix nil dereference on error path
  eval: Eliminate division by zero
  doc: Update changes
  opflags: Convert is_class and is_reg_class to helpers
  preproc: Fix out of range access in expand mmacro
  doc: Update changes
  parser: Fix sigsegv on certain equ instruction parsing
  labels: Make sure nil label is never passed
  labels: Don't nil dereference if no label provided
  macho: Add warning message in macho_output()
  macho/reloc: Fix addr size sensitive conditions
  macho/reloc: Fix macho_output() to get the offset adjustments by add_reloc()
  macho/reloc: Fixed offset adjustment in add_reloc()
  macho/reloc: Allow absolute relocation when forcing a symbol reference
  macho/reloc: Adjust SUB relocation information
  macho/reloc: Fixed in handling GOT/GOTLOAD/TLV relocations
  macho/reloc: Simplified relocation for REL/BRANCH
  macho/sym: Record initial symbol number always
  ...

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
2018-10-15 22:58:13 +03:00
Cyrill Gorcunov
ceec0d8187 eval: Eliminate division by zero
When doing division we should detect if the value we're
divided by is not zero. Instead of is_unknown() helper
we should use is_just_unknown().

https://bugzilla.nasm.us/show_bug.cgi?id=3392515
https://bugzilla.nasm.us/show_bug.cgi?id=3392473

Reported-by: Jun <jxx13@psu.edu>
Reported-by: stuartly <situlingyun@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
2018-10-14 01:49:43 +03:00
H. Peter Anvin
3bb1dd0bee eval: add spaceship operator <=>
<=> returns -1, 0, or 1 depending on the ordering of two values.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-06-15 18:46:11 -07:00
H. Peter Anvin
94adf7d765 eval: add support for signed shift operators <<< and >>>
Add support for signed shifts.  The operators are <<< and >>>,
although the former is (inherently) idntical to <<.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-06-15 18:37:32 -07:00
H. Peter Anvin
c51369067c errors: simplify nasm_fatal() and nasm_panic()
Nearly all instances of nasm_fatal() and nasm_panic() take a flags
argument of zero. Simplify the code by making nasm_fatal and
nasm_panic default to no flags, and add an alternate version if flags
really are desired. This also means that every call site doesn't have
to initialize a zero argument.

Furthermore, ERR_NOFILE is now often not necessary, as the error code
will no longer cause a null reference if there is no current
file. Therefore, we can remove many instances of ERR_NOFILE which only
deprives the user of information.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-06-15 18:20:17 -07:00
H. Peter Anvin
79561027a0 Make limits 64 bits, add globallines limit to configurable limits
Make all limit counters 64 bits, in case someone really has a usage
for an insanely large program. The globallines limit was omitted, add
it to the list of configurable limits.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-06-15 17:57:15 -07:00
H. Peter Anvin
a3d96d02b0 Make limits 64 bits, add globallines limit to configurable limits
Make all limit counters 64 bits, in case someone really has a usage
for an insanely large program. The globallines limit was omitted, add
it to the list of configurable limits.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2018-06-15 17:56:25 -07:00
H. Peter Anvin
987dc9c9db Make any execution limit configurable, add eval limit
Make any "deadman"-style execution limit configurable on the command
line (--limit-foo) or via a pragma (%pragma limit foo).

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2018-06-12 13:54:42 -07:00
H. Peter Anvin
98578071b9 Cleanup of label renaming infrastructure, add subsection support
In order to support Mach-O better, add support for subsections, as
used by Mach-O "subsections_via_symbols". We also want to add
infrastructure to support this by downcalling to the backend to
indicate if a new subsection is needed.

Currently this supports a maximum of 2^14 subsections per section for
Mach-O; this can be addressed by adding a level of indirection (or
cleaning up the handling of sections so we have an actual data
structure.)

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2018-06-01 18:06:25 -07:00
H. Peter Anvin
0a126062fb ilog2(): inline functions if practical
For many (most?) targets these will be very small functions, so inline
them.  However, just in case make these external library functions.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2017-09-27 13:34:42 -07:00
H. Peter Anvin
b20bc733c9 asm/*: Move directive processing to its own file, refactor error handling
Move directive processing to its own file, and move nasmlib/error.c to
asm/error.c (it was not used by the disassembler); remove some extern
declarations from .c files, and do some general code cleanups.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2017-03-07 19:31:04 -08:00
H. Peter Anvin
e1f985c167 Reorganize the source code into subdirectories
Make the source code easier to understand and keep track of by
organizing it into subdirectories depending on the function.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2016-05-25 12:06:29 -07:00