[Xenomai-core] Xenomai in Debian
Hi,
I'm just working on the Xenomai 2.5.1 Debian package and encountered
non-PIC code (evil! ;-) in the shared libraries (skins libraries).
You can see it with e.g.
$ readelf -d src/skins/native/.libs/libnative.so.3.0.0
The TEXTREL tag indicates non-PIC code.
$ scanelf -qT src/skins/native/.libs/libnative.so.3.0.0
Shows the function and code offset of the relocation.
With
$ objdump -d src/skins/native/.libs/libnative.so.3.0.0
I found the actual location of the relocation.
I prepared a patch (attached) that fixes it: First, the relocation
itself by letting GCC create the address in PIC style. Second, extern
inline looks a bit counterintuitive at first, but according to the GCC
manual, it seems to be what we want (macro behaviour).
Thanks Jan for reminding me!
bye,
Roland
--- xenomai-2.5.1.orig/include/asm-x86/syscall.h
+++ xenomai-2.5.1/include/asm-x86/syscall.h
@@ -161,9 +161,11 @@
.endif\n\t
.endm\n\t);
-static inline void __xn_get_eip(void **dest)
+__attribute__((always_inline))
+extern inline void __xn_get_eip(void **dest)
{
-asm volatile(movl $1f, %0; 1:: =m(*dest));
+addr:
+ *dest = addr;
}
static inline void __xn_get_ebp(void **dest)
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Re: [Xenomai-core] [PULL REQUEST] analogy: bug fixes + insn_bits
Alexis Berlemont wrote: The following changes since commit 4a5b93dabf66529e665c8f8422902347d4f6158f: Jan Kiszka (1): RTDM: Split up application and driver debugging are available in the git repository at: git://git.xenomai.org/xenomai-abe.git analogy Merged. -- Gilles. ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] Xenomai in Debian
Roland Stigge wrote: Hi, I'm just working on the Xenomai 2.5.1 Debian package and encountered non-PIC code (evil! ;-) in the shared libraries (skins libraries). You can see it with e.g. $ readelf -d src/skins/native/.libs/libnative.so.3.0.0 The TEXTREL tag indicates non-PIC code. $ scanelf -qT src/skins/native/.libs/libnative.so.3.0.0 Shows the function and code offset of the relocation. With $ objdump -d src/skins/native/.libs/libnative.so.3.0.0 I found the actual location of the relocation. I prepared a patch (attached) that fixes it: First, the relocation itself by letting GCC create the address in PIC style. Second, extern inline looks a bit counterintuitive at first, but according to the GCC manual, it seems to be what we want (macro behaviour). Thanks Jan for reminding me! Glad to hear that debian work on Xenomai has resumed. Merged, thanks. -- Gilles. ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
