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author | Rich Felker <dalias@aerifal.cx> | 2015-09-23 18:33:49 +0000 |
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committer | Rich Felker <dalias@aerifal.cx> | 2015-09-23 18:33:49 +0000 |
commit | b61df2294f662540786f2558f691eba7447ff5ba (patch) | |
tree | 097e5fc922c4379fe7291f9381fa4fb0b79c1228 /src/signal/sigaction.c | |
parent | 6c5cad2aa56745302c1d42d2c8baf6424d29c0f3 (diff) | |
download | musl-b61df2294f662540786f2558f691eba7447ff5ba.tar.gz musl-b61df2294f662540786f2558f691eba7447ff5ba.tar.bz2 musl-b61df2294f662540786f2558f691eba7447ff5ba.tar.xz musl-b61df2294f662540786f2558f691eba7447ff5ba.zip |
fix signal return for sh/fdpic
the restorer function pointer provided in the kernel sigaction
structure is interpreted by the kernel as a raw code address, not a
function descriptor.
this commit moves the declarations of the __restore and __restore_rt
symbols to ksigaction.h so that arch versions of the file can override
them, and introduces a version for sh which declares them as objects
rather than functions.
an alternate solution would have been defining SA_RESTORER to 0 so
that the functions are not used, but this both requires executable
stack (since the sh kernel does not have a vdso page with permanent
restorer functions) and crashes on qemu user-level emulation.
Diffstat (limited to 'src/signal/sigaction.c')
-rw-r--r-- | src/signal/sigaction.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/src/signal/sigaction.c b/src/signal/sigaction.c index d5f47741..ab23a6f2 100644 --- a/src/signal/sigaction.c +++ b/src/signal/sigaction.c @@ -6,8 +6,6 @@ #include "libc.h" #include "ksigaction.h" -void __restore(), __restore_rt(); - static int unmask_done; static unsigned long handler_set[_NSIG/(8*sizeof(long))]; |