In 78f14ab1a6 the fix
is incomplete, we should move free procedure out of
the list_for_each traverse.
CID 1432930
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
If new list is not needed then we should free memory
allocated by nasm_basename and nasm_dirname calls.
CID 1432930
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
At least DWARF can encode C-style macros. In doing so, it wants the
file include hierarchy, so give the debug format backend the option of
receiving that information from the preprocessor.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Collect macro call/nesting information for the benefit of the debug
back end. So far, the only backend for which this is provided is the
debug back end, to show what information is present.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
NASM convention is to use all-upper-case for "real" information, and
mixed-case (upper case common prefix, lower case description) for
meta-information. This is a highly useful distinction.
Thus "LBL_NONE" implies an actual label of type "NONE", as opposed to
no label at all.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Currently, NASM always issues as an unknown symbol any symbol declared
EXTERN. This is highly undesirable when using common header files,
as it might cause the linker to pull in a bunch of unnecessary
modules, depending on how smart the linker is.
Add a new REQUIRED directive which behaves like the old EXTERN, for
the use cases which might still need this behavior.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
"compiler.h" already includes a bunch of common include files. There
is absolutely no reason to duplicate them in individual files, and in
fact it robs us of central control of how these files are used.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
For almost everything we should use "nctype.h". Right now we don't
have a nasm_toupper() to use <ctype.h> for things that need toupper().
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
There is absolutely no reason not to include <string.h> globally, and
with the inline function for mempcpy() we need it there anyway.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The use of pass0, pass1, pass2, and "pass" passed as an argument is
really confusing and already caused a severe bug in the 2.14.01
release cycle. Clean them up and be far more explicit about what
various passes mean.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Add binary key support to the hash table interface. Clean up the
interface to contain less extraneous crud.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
When we are running regression tests we compare binary
forms and the strings better to be the constants to not
trigger false positives.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
* 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>
Unlike the relative relocations, OUT_ADDRESS had ignored the adjustments
made by add_reloc(), and writes the offset of the target symbol in the
target section.
Based-on-code-from: zenith432 <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <changseok.bae@gmail.com>
If the target symbol is in the same file, add_reloc() emits an
internal reloc for the target section, and the offset written
is the offset in the target section. If the target symbol is
external, its offset is zero (or an explicit addend), and
add_reloc() emits an external reloc for the symbol.
Based-on-code-from: zenith432 <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <changseok.bae@gmail.com>
The (fake) section for absolute symbols is not in the linked list. So,
when the section is not found from the index, now it simply points to
the special section.
Based-on-code-from: zenith432 <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <changseok.bae@gmail.com>
As SUB relocation getting deprecated, reset external reference seems to
be enough. Also, print a warning message for this.
Based-on-code-from: zenith432 <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <changseok.bae@gmail.com>
- Changed to search all symbols, instead of only global symbols.
- Will do immediate exits when unsupported use of WRT
- Fixed to mark (got)pcrel flag only for macho64 output. GOT is
supported only for 64-bit.
Based-on-code-from: zenith432 <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <changseok.bae@gmail.com>
It seems like the relocation for the relative reference
to absolute addresses only cares external reference info.
Instead of exiting, reset the external reference flag.
Based-on-code-from: zenith432 <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <changseok.bae@gmail.com>
The special segment may need this information for future fix-ups.
Based-on-code-from: zenith432 <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <changseok.bae@gmail.com>
Previously, X86_64_RELOC_BRANCH is only set for external
relocations. Internal relocation also needs this type to be
set, instead of the default (X86_64_RELOC_SIGNED) or
anything.
Reported-by: <zenith432@users.sourceforge.net>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
The jump-match optimization tends to remove labels. When the
"subsections_via_symbols" pragma is declared, all the labels
should be emitted. Disabling the optimization (only) makes
the pragma effective.
It might be cleaner to extend the OFMT interface to support
callback function. In this case, the reconfiguration can be
done through the callback interface, rather than direct
access to the global variable.
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
We don't want to lose the offset into the parent section when we
create a subsection, at least not for the MachO backend which is
currently the only user of subsections. Allow ofmt->herelabel() to set
a flag to copy the section offset from the previous section.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
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>
ABSOLUTE handling can be done centrally, and shouldn't need to be in
every backend. Simply drop the call to ofmt->output().
Many backends have an assert for OUT_RAWDATA not having a target
segment; this doesn't make any sense as output/legacy.c will not allow
that to happen.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Only two output formats (obj and ieee) actually need ofmt->segbase, so
move the common dummy definion into nullout.c.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Encoding magic (in this case, subsection number) by bitfields in the
segment index has several problems:
1. It limits the number of *external symbols* as well as
segments/subsections.
2. It is inefficient for the assembler (creates a very large RAA).
This is also a really good opportunity for removing linear lookups in
the MachO backend. We now use an RAA to do look up segment by index,
and a hash table to look up segment by name. Subsections are simply
handled by allocating a new index using seg_alloc() but still point it
to the same section structure in the index RAA.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Allow the subsection to store a subsection value directly in the
label, rather than having to do strange encoding hacks.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
OFMT_KEEP_ADDR seems to not work properly. Now when we have proper
subsections, there is no need for that anymore.
This reverts commit 69ed82447a.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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>
MachO has this odd thing called "subsections via symbols", by which a
symbol can magically start what effectively is a new section. To
support this, add support for a calldown into the backend when a new
symbol is defined *at the current output location*, and allow it to
switch the current segment.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Without relocation, the linker may do erroneous dead strip.
For the relocation, the conversion of addresses to RAWDATA
should be avoided for Mach-O.
https://bugzilla.nasm.us/show_bug.cgi?id=3392469
Reported-by: Andrew Fish <afish@apple.com>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Even though the size is set to 64-bit, actual value can be
in 32-bit range. In that case, the use of such absolute
address is prevented.
The side effect of 58d2ab17 is resolved.
https://bugzilla.nasm.us/show_bug.cgi?id=3392468
Reported-by: Richard Russell <rtrussell@gmail.com>
Reported-by: Michael Petch <mpetch@capp-sysware.com>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This allows to mark global symbols as private external.
Similar to visibility hidden in ELF output.
Signed-off-by: Matthieu Darbois <mayeut@users.noreply.github.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
These modules need a reference to input filename.
For example elf put into symbol table
| SYMBOL TABLE:
| 0000000000000000 l df *ABS* 0000000000000000 sha-64.asm
Otherwise this become empty string.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
