tak jen pro info, s nejvetsi pravdepodobnosti problem s novejsi padajici libc je zpusoben chybejici emulaci FPU v turris kernelu v kombinaci s tim ze asi nezafungovalo u libc nebo libgcc neco co by to normalne melo resit. Protoze cely smysl powerpcspe debianu https://wiki.debian.org/PowerPCSPEPort je o tom ze e500 CPU ma jinak implementovany matematicky koprocesor takze instrukce s plovouci carkou jsou jine
hmm, tak jsem si to potvrdil pomoci gdb viz nize, na tohle po upgradu libc pada apt-get update - je videt ze v libc.so.6 jsou pouzite FPU instrukce, ve funkci isnanf() to spadne na mtfsb0
(gdb) run
Starting program: /usr/bin/apt-get update
Program received signal SIGILL, Illegal instruction.
0x0fa76c08 in isnanf () from /lib/powerpc-linux-gnuspe/libc.so.6
(gdb) disas
Dump of assembler code for function isnanf:
0x0fa76bf8 <+0>: stwu r1,-16(r1)
0x0fa76bfc <+4>: evmergelo r9,r3,r4
0x0fa76c00 <+8>: stw r3,8(r1)
0x0fa76c04 <+12>: stw r4,12(r1)
=> 0x0fa76c08 <+16>: mtfsb0 4*cr6+lt
0x0fa76c0c <+20>: efdcmpeq cr7,r9,r9
0x0fa76c10 <+24>: crnot 4*cr7+gt,4*cr7+gt
0x0fa76c14 <+28>: mfcr r3
0x0fa76c18 <+32>: rlwinm r3,r3,30,31,31
0x0fa76c1c <+36>: addi r1,r1,16
0x0fa76c20 <+40>: blr
End of assembler dump.
(gdb)
