absolute.asm is useful even for other backends, so explicitly test to
see if ORG is possible for this format.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Add a simple test case for context-local (%$) labels not disturbing
the local variable namespace, and extern labels getting promoted to
global.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
If we define a label which was previously declared EXTERN, then
automatically treat is as GLOBAL.
Previously, we would fail to converge and loop forever, which is
obviously not what we want. This is more user-friendly anyway.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
If we have overridden EXTERN, then we should not call define_label()
on it again. Return a fail status from declare_label(), indicating
that the type declaration failed, but of course we don't print an
error message.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
The prefix and suffix options call perm_alloc() in labels.c, which is
not available until init_labels() have run. There is no reason not to
call init_labels() early.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
..@ labels (macro-local) are NASM specials, although not "magic": they
are explicitly defined to not preturb the local label base name.
However, they return false for both islocal() and ismagic(), so we
need to add a new function containing the correct test for when the
local label base should be advanced.
Reported-by: <balducci@units.it>
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Bae, Chang Seok <chang.seok.bae@intel.com>
ofmt->symdef() always takes the mangled label name, make sure we
actually do the correct thing even for forward fixups.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Apparently it isn't just NMAKE which is sensitive to the ordering of
.SUFFIXES, it apparently applies just as well to Unix make.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
1. The mkdep.pl program didn't handle excluded dependencies correctly,
causing it to error out due to config/config.h not existing.
2. NMAKE is sensitive to the order suffixes appear in .SUFFIXES,
causing it to try to use the builtin rule .c.exe instead of
.c.obj -> .obj.exe.
3. NMAKE doesn't handle the && operator between commands.
4. The !ifdef jungle around dependency generation was wrong.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
asm/directbl.h was missing from .gitignore, making this generated file
show up as a file not checked in.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
There are cases where we may want to implement generic pragmas, while
still make them selective based on output and/or debug formats.
Initially, use this for the prefix/suffix options.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Chang Seok Bae <chang.seok.bae@intel.com>
It is quite likely we may want to build the same input with multiple
output formats; make it so we don't lose the list file.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Add instructions from the Intel Instruction Set Extensions and Future
Features Programming Reference, document 319433-034, May 2018.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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>
If we allocate a new segment number, that has to cause
global_offset_changed to be incremented. Thus, we should not update
lptr->defn.segment until that would ordinarily be done.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
If a symbol is EXTERN or COMMON, then we should not keep assigning it
new segment numbers over and over. Instead, change the label code so
that it assignes a new segment value if and only if one has not been
assigned before.
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>
We are not supposed to reset the segment numbers; this was an
attempted fix for a convergence bug that didn't actually exist. The
backend is required to return the same segment number for the same
segment; if it does not, the front end will not converge, but that is
in fact the correct behavior.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
RAAs can, and should be, usable for storing pointers as well as
integers. In reality it is exactly the same code, but make it explicit
by having different entry points. In the actual RAA the data is
stored as a union, which in practice will not occupy any more space
than the existing code.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Fix the parsing of long options (arguments with = broke things.)
Actually issue a warning if we specify a wrong limit on the command
line.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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>
Recent changes broke:
1. Backend-provided special segments, due to seg_alloc() getting
reset.
2. COMMON; the old code would pass size in the "offset" *without*
setting it in the label structure. Containing all this information
in the label structure requires another field.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Add --pragma to add pragmas on the command line; --before option to
add *any* statement on the command line, and add --include as an alias
for -P for familiarity with other toolchains.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
During code suffle we occasionally made cpu directive to
take letter case into account despite the documentation.
https://bugzilla.nasm.us/show_bug.cgi?id=3392491
Reported-by: Rebecca Cran <rebecca@bluestop.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
strncpy() is correctly used to fill in a zero-*padded* (not
zero-terminated) field in several places. Make gcc not complain about
those uses.
Signed-off-by: H. Peter Anvin <hpa@zytor.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 69ed82447a13a22e52a86a51a5657c7955a6767b.
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>
"output" and "debug" are supposed to redirect to the current output
and debug formats. Fix it so it actually does.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
None of our symbols are available for a dynamic library, and if they
were, there would be no point in allowing them to be overridden. This
optimizes code generation for global symbols.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Simplify the nasm_malloc() code by moving the pointer check into a
common subroutine.
We can now issue a filename error even for failures like malloc().
Add support for the gcc sentinel attribute (verify that a list ends
with NULL).
Add a handful of safe_alloc attributes.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
