| Commit message (Expand) | Author | Files | Lines |
|---|
| 2022-08-20 | use alt signal stack when present for implementation-internal signals•••a request for this behavior has been open for a long time. the
motivation is that application code, particularly under some language
runtimes designed around very-low-footprint coroutine type constructs,
may be operating with extremely small stack sizes unsuitable for
receiving signals, using a separate signal stack for any signals it
might handle.
progress on this was blocked at one point trying to determine whether
the implementation is actually entitled to clobber the alt stack, but
the phrasing "available to the implementation" in the POSIX spec for
sigaltstack seems to make it clear that the application cannot rely on
the contents of this memory to be preserved in the absence of signal
delivery (on the abstract machine, excluding implementation-internal
signals) and that we can therefore use it for delivery of signals that
"don't exist" on the abstract machine.
no change is made for SIGTIMER since it is always blocked when used,
and accepted via sigwaitinfo rather than execution of the signal
handler.
| Rich Felker | 3 | -3/+3 |
| 2022-08-17 | ldso: make exit condition clearer in fixup_rpath•••breaking out of the switch-case when l==-1 means the conditional below
will necessarily be true (-1 >= buf_size, a size_t variable) and the
function will return 0. it is, however, somewhat unclear that that's
what's happening. simply returning there is simpler
| Érico Nogueira | 1 | -1/+1 |
| 2022-08-17 | freopen: reset stream orientation (byte/wide) and encoding rule•••this is a requirement of the C language (orientation) and POSIX
(encoding rule) that was somehow overlooked.
we rely on the fact that the buffer pointers have been reset by
fflush, so that any future stdio operations on the stream will go
through the same code paths they would on a newly-opened file without
an orientation set, thereby setting the orientation as they should.
| Rich Felker | 1 | -0/+2 |
| 2022-08-02 | ldso: process RELR only for non-FDPIC archs•••the way RELR is applied is not a meaningful operation for FDPIC (there
is no single "base" address). it seems unlikely RELR would ever be
added for FDPIC, but if it ever is, the behavior and possibly data
format will need to be different, so guard against calling the
non-FDPIC code.
| Rich Felker | 1 | -1/+2 |
| 2022-08-02 | ldso: support DT_RELR relative relocation format•••this resolves DT_RELR relocations in non-ldso, dynamic-linked objects.
| Fangrui Song | 3 | -4/+27 |
| 2022-08-02 | use syscall_arg_t and __scc macro for arguments to __alt_socketcall•••otherwise, pointer arguments are sign-extended on x32, resulting in
EFAULT.
| Alex Xu (Hello71) | 1 | -3/+3 |
| 2022-08-01 | fix strings.h feature test macro usage due to missing features.h | Michael Pratt | 1 | -0/+1 |
| 2022-08-01 | fix ESRCH error handling for clock_getcpuclockid•••the syscall used to probe availability of the clock fails with EINVAL
when the requested pid does not exist, but clock_getcpuclockid is
specified to use ESRCH for this purpose.
| Eugene Yudin | 1 | -0/+1 |
