Explanation by Matthias Schwarzott:
The linker will request an executable stack as soon as at least one
object file, that is linked in, wants an executable stack.
And the absence of the
.section .note.GNU-stack."",@progbits
is enough to tell the linker that an executable stack is needed.
So even an empty asm-file must at least contain this statement to not
force executable stacks on the whole executable.
* Define a helper macro MARK_STACK_NO_EXEC that disables the
executable stack.
* Instantiate this macro unconditionally at the end of each asm file.
Patch by Matthias Schwarzott <zzam@gentoo.org>.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15692
I tried using 'svn merge' to do the merge but it did a terrible job and
there were bazillions of conflicts. So instead I just took the diff between
the branch and trunk at r10155, applied the diff to the trunk, 'svn add'ed
the added files (no files needed to be 'svn remove'd) and committed.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10156
changes from r4341 through r4787 inclusive). That branch is now dead.
Please do not commit anything else to it.
For the most part the merge was not troublesome. The main areas of
uncertainty are:
- build system: I had to import by hand Makefile.core-AM_CPPFLAGS.am
and include it in a couple of places. Building etc seems to still
work, but I haven't tried building the documentation.
- syscall wrappers: Following analysis by Greg & Nick, a whole lot of
stuff was moved from -generic to -linux after the branch was created.
I think that is satisfactorily glued back together now.
- Regtests: although this appears to work, no .out files appear, which
is strange, and makes it hard to diagnose regtest failures. In
particular memcheck/tests/x86/scalar.stderr.exp remains in a
conflicted state.
- amd64 is broken (slightly), and ppc32 will be unbuildable. I'll
attend to the former shortly.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4789
things. These made sense when the arch/OS/platform-specific code was in
one module, but as that code got mixed in with generic code the boundary
between generic and non-generic blurred, and the distinction made less
sense. So let's get rid of them.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4002
module-local, use the new ML_ prefix instead of VG_. This makes it
trivial to see which names are those exported from public module
interfaces: precisely those using VG_.
/* VG_ is for symbols exported from modules. ML_ (module-local) is
for symbols which are not intended to be visible outside modules,
but which cannot be declared as C 'static's since they need to be
visible across C files within a given module. It is a mistake for
a ML_ name to appear in a pub_core_*.h or pub_tool_*.h file.
Likewise it is a mistake for a VG_ name to appear in a priv_*.h
file.
*/
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4000
- Broke part of m_scheduler off into a new module m_threadstate. It
contains ThreadState, VG_(threads)[] and some basic operations on the
thread table. All simple stuff, the complex stuff stays in m_scheduler.
This avoids lots of circular dependencies between m_scheduler and other
modules.
- Managed to finally remove core.h and tool.h, double hurrah!
- Introduced pub_tool_basics.h and pub_core_basics.h, one of which is
include by every single C file.
- Lots of little cleanups and changes related to the above.
- I even did a small amount of documentation updating.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3944
