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Diffstat (limited to 'results/scraper/launchpad-without-comments/1724570')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1724570 | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1724570 b/results/scraper/launchpad-without-comments/1724570 new file mode 100644 index 000000000..63f78e15d --- /dev/null +++ b/results/scraper/launchpad-without-comments/1724570 @@ -0,0 +1,39 @@ +qemu-system-x86_64 generates ACPI tables with broken endianess when run on big-endian hosts + +The bios-tables-test always fails when run on a big-endian host, which has iasl installed. When it calls iasl to dumps the AML files into ASL files, iasl complains + +Intel ACPI Component Architecture +ASL+ Optimizing Compiler/Disassembler version 20170831 +Copyright (c) 2000 - 2017 Intel Corporation + +Input file aml-4L677Y, Length 0x38 (56) bytes +Table [TEPH] is too long for file - needs: 0x38000000, remaining in file: 0x38 +Could not get ACPI tables from aml-4L677Y, AE_BAD_HEADER + + +At first I thought this was an iasl bug, but the latest version of iasl in rawhide is ported to big endian. + +So I looked at the actual AML files that bios-tables-test extracts from the qemu-system-x86_64 memory space, when running on ppc64 host. These do indeed have different content from the AML files generated by qemu-system-x86_64 when running on an x86_64 host. + + +eg the AML file for the HPET shows + +< 0000000 T E P H nul nul nul 8 soh etx B O C H S sp +< 4554 4850 0000 3800 0301 4f42 4843 2053 +< 0000020 B X P C H P E T nul nul nul soh B X P C +< 5842 4350 5048 5445 0000 0100 5842 4350 +< 0000040 nul nul nul soh soh " ack nul nul nul nul nul nul nul P ~ +< 0000 0100 a201 8086 0000 0000 0000 fed0 +--- +> 0000000 H P E T 8 nul nul nul soh etx B O C H S sp +> 5048 5445 0038 0000 0301 4f42 4843 2053 +> 0000020 B X P C H P E T soh nul nul nul B X P C +> 5842 4350 5048 5445 0001 0000 5842 4350 +> 0000040 soh nul nul nul soh " ack nul nul nul nul nul nul nul P ~ +> 0001 0000 a201 8086 0000 0000 0000 fed0 + +so not only is the table name inverted, but the lenght is inverted, and several fields later on are inverted too. + +Other AML files for APIC and DSDT show similar brokenness + +This is seen with QEMU 2.10.0 \ No newline at end of file |