Previously, the ELF backends silently ignored incorrect or unknown
attributes on section declarations, and therefore used default values
in cases where the user had make an error in attempting to specify
custom values.
I needed entry point support with the as86 format, and after looking through
the archives found a similar desire from someone in 2002. For some reason
such a patch never made it into the code, even though the required flag
value is present, so I offer the a patch of my own.
I compared against what is done in the .obj format and the approaches are
quite similar which I hope will aid in its acceptability. While I have
tested it extensively it does do the job asked, and I'm honestly not sure
what extensive testing of the change would look like.
Several projects have taken to using .text to store read-only data
when building on Mac OS X due to crashes in SSE code from the .rodata
section being mis-aligned. It seems there was a misunderstanding about
how ld/ld64 handles section alignment in outmacho.c so I wrote a patch
to fix it. I tested it against x264 git, modified it to use ".rodata
align=16" for the data section and use movdqa instructions (guaranteed
to crash when built with unpatched nasm) and it passed all tests in
its checkasm tool.
If you want more data I can provide, but it's late and I've had a
couple glasses of mulled wine :)
-DrD-
Linear searches are evil, so use an llrbtree to search for symbols by
offset. This doesn't change the preexisting behaviour that we only
look for global symbols.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The POPCNT instruction should not require sizes on memory operands.
Add the appropriate size flags for that to work.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The implication that %line allows NASM to digest cpp output is just
plain wrong, at least without additional intermediate processing. Be
a little more circumspect.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
nasm.c should respect the default debug format of the output format,
instead of replacing it with the first format in the list.
This is cleaner and allows the list to be sorted normally.
This commit rewrites commit 116994111b which was very fragile.
Minimize the TLS documentation examples (we don't need "dword" in a
mov from ebx, for example.) This is just to avoid user confusion.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Snapshot releases have *only* digits in the tail. "git describe"
produces tails that have digits in them, but aren't numeric.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Move all the version strings to a single compilation unit, ver.c; this
does not include the version macros, which are fed into macros.c.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Set default attributes for .tdata and .tbss sections
Implement new attribute 'tls' for arbitrary section names
Flag variables in sections with tls attribute with STT_TLS
Drop the data pointer, and instead assume the struct rbtree will be
embedded in a bigger data structure (to be extracted via
container_of()).
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
offsetof() is a C99 construct; provided here as an ersatz for older
systems.
container_of() is a nonstandard but highly useful construct, which
allows data structure control items like tree structures to be
embedded in larger data structures without the penalty of extra
pointers and allocations.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Implement library functions for "left-leaning red-black trees" with
uint64_t keys. This is meant for looking up symbols by address in the
backends that need to do so, e.g. ELF.
A good question is if there is a better way to do this, that recovers
the original symbol, but that's a future issue.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Explicitly document that %[...] and macro parameters concatenate the
same way, and cross-reference the two.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Remove duplicate entry for the "error" warning class; leave at the end
with "all", as being another meta-warning class.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Retroactively document the following changes to the warning options:
- gcc-like syntax (-Wfoo, -Wno-foo)
- "all" alias
- "error" metawarning
Added in 2.00rc1 but never documented.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Remove duplicate entry for the "error" warning class; leave at the end
with "all", as being another meta-warning class.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Retroactively document the following changes to the warning options:
- gcc-like syntax (-Wfoo, -Wno-foo)
- "all" alias
- "error" metawarning
Added in 2.00rc1 but never documented.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
