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authorBharata B Rao <bharata@linux.vnet.ibm.com>2014-05-19 19:58:35 +0200
committerAlexander Graf <agraf@suse.de>2014-06-16 13:24:36 +0200
commit0c967de9c00321f893a57617a4e3dfcda05266f5 (patch)
tree2bb6c78100fd16676d35d88e89619f71c34ffc3f /target-ppc/cpu-qom.h
parentacb0ef5801fc0caafdcfd34ae62e48d276866a1b (diff)
target-ppc: Support dump for little endian ppc64
Fix ppc64 arch specific dump code to support all combinations of little/big endian hosts/guests. FWIW the current code is broken for altivec registers when guest and host have a different endianness: these 128-bit registers are written to guest memory as a two 64-bit entities and we should also swap them. Unit testing was done with the following program provided by Tom Musta: #include <stdio.h> #include <stdint.h> #include <stdlib.h> int main(int argc, char** argv) { __uint128_t v = ((__uint128_t)0x0001020304050607ull << 64) | 0x08090a0b0c0d0e0full; register void * vptr asm ("r11"); vptr = &v; for(;;) asm volatile ("lvx 30,0,11" ); } When sending SIGABRT to this program and examining the core file, we get: - ppc64 : 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f - ppc64le: 0f 0e 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 We expect to find the very same layout in the QEMU dump since they are real core files. This is what we get: - ppc64 host, ppc64 guest : 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f - ppc64 host, ppc64le guest : 0f 0e 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 - x86_64 host, ppc64 guest : 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f - x86_64 host, ppc64le guest: 0f 0e 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 We introduce a NoteFuncArg type to avoid adding extra arguments to all note functions. Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> [ rebased on top of current master branch, introduced NoteFuncArg, use new cpu_to_dump{16,32,64} endian helpers, fix altivec support, Greg Kurz <gkurz@linux.vnet.ibm.com> ] Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/cpu-qom.h')
0 files changed, 0 insertions, 0 deletions