path: root/arch/sh
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authorRich Felker <>2015-09-23 18:33:49 +0000
committerRich Felker <>2015-09-23 18:33:49 +0000
commitb61df2294f662540786f2558f691eba7447ff5ba (patch)
tree097e5fc922c4379fe7291f9381fa4fb0b79c1228 /arch/sh
parent6c5cad2aa56745302c1d42d2c8baf6424d29c0f3 (diff)
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 'arch/sh')
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/sh/ksigaction.h b/arch/sh/ksigaction.h
new file mode 100644
index 00000000..0c652bea
--- /dev/null
+++ b/arch/sh/ksigaction.h
@@ -0,0 +1,8 @@
+struct k_sigaction {
+ void (*handler)(int);
+ unsigned long flags;
+ void *restorer;
+ unsigned mask[2];
+extern unsigned char __restore[], __restore_rt[];