The dmg file has many tables which describe: "start from sector XXX to
sector XXX, the compression method is XXX and where the compressed data
resides on".
Each sector in the expanded file should be covered by a table. The table
will describe the offset of compressed data (or raw depends on the type)
in the dmg.
For example:
[-----------The expanded file------------]
[---bzip table ---]/* zeros */[---zlib---]
^
| if we want to read this sector.
we will find bzip table which contains this sector, and get the
compressed data offset, read it from dmg, uncompress it, finally write to
expanded file.
If we skip zero chunk (table), some sector cannot find the table which
will cause search_chunk() return s->n_chunks, dmg_read_chunk() return -1
and finally causing dmg_co_preadv() return EIO.
See:
[-----------The expanded file------------]
[---bzip table ---]/* zeros */[---zlib---]
^
| if we want to read this sector.
Oops, we cannot find the table contains it...
In the original implementation, we don't have zero table. When we try to
read sector inside the zero chunk. We will get EIO, and skip reading.
After this patch, we treat zero chunk the same as ignore chunk, it will
directly write zero and avoid some sector may not find the table.
After this patch:
[-----------The expanded file------------]
[---bzip table ---][--zeros--][---zlib---]
Signed-off-by: yuchenlin <npes87184@gmail.com>
Reviewed-by: Julio Faracco <jcfaracco@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190103114700.9686-4-npes87184@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
There is a possible hang in original binary search implementation. That is
if chunk1 = 4, chunk2 = 5, chunk3 = 4, and we go else case.
The chunk1 will be still 4, and so on.
Signed-off-by: yuchenlin <npes87184@gmail.com>
Message-id: 20190103114700.9686-2-npes87184@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This is a trivial patch to fix a wrong value for block terminator.
The old value was 0x7fffffff which is wrong. It was not affecting the
code because QEMU dmg block is not handling block terminator right now.
Neverthless, it should be fixed.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Reviewed-by: yuchenlin <yuchenlin@synology.com>
Message-id: 20181228145055.18039-1-jcfaracco@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Merge remote-tracking branch 'remotes/amarkovic/tags/mips-queue-december-2018-v3' into staging
MIPS queue for December 2018 - v3
# gpg: Signature made Thu 03 Jan 2019 16:53:47 GMT
# gpg: using RSA key D4972A8967F75A65
# gpg: Good signature from "Aleksandar Markovic <amarkovic@wavecomp.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 8526 FBF1 5DA3 811F 4A01 DD75 D497 2A89 67F7 5A65
* remotes/amarkovic/tags/mips-queue-december-2018-v3: (44 commits)
tests/tcg: mips: Test R5900 three-operand MADDU1
tests/tcg: mips: Test R5900 three-operand MADDU
tests/tcg: mips: Test R5900 three-operand MADD1
tests/tcg: mips: Test R5900 three-operand MADD
disas: nanoMIPS: Add a note on documentation
disas: nanoMIPS: Reorder declarations and definitions of gpr decoders
disas: nanoMIPS: Comment the decoder of 'gpr1' gpr encoding type
disas: nanoMIPS: Rename the decoder of 'gpr1' gpr encoding type
disas: nanoMIPS: Comment the decoder of 'gpr2.reg2' gpr encoding type
disas: nanoMIPS: Rename the decoder of 'gpr2.reg2' gpr encoding type
disas: nanoMIPS: Comment the decoder of 'gpr2.reg1' gpr encoding type
disas: nanoMIPS: Rename the decoder of 'gpr2.reg1' gpr encoding type
disas: nanoMIPS: Comment the decoder of 'gpr4.zero' gpr encoding type
disas: nanoMIPS: Rename the decoder of 'gpr4.zero' gpr encoding type
disas: nanoMIPS: Comment the decoder of 'gpr4' gpr encoding type
disas: nanoMIPS: Rename the decoder of 'gpr4' gpr encoding type
disas: nanoMIPS: Comment the decoder of 'gpr3.src.store' gpr encoding type
disas: nanoMIPS: Rename the decoder of 'gpr3.src.store' gpr encoding type
disas: nanoMIPS: Comment the decoder of 'gpr3' gpr encoding type
disas: nanoMIPS: Rename the decoder of 'gpr3' gpr encoding type
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Test R5900 three-operand MADDU1.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Test R5900 three-operand MADDU.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Test R5900 three-operand MADD1.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Test R5900 three-operand MADD.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Add "nanoMIPS32 Instruction Set Technical Reference Manual" as
a reference.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reorder declarations and definitions of gpr decoders by number of
input bits of corresponding encoding type.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Comment the decoder of 'gpr1' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename the decoder of 'gpr1' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Comment the decoder of 'gpr2.reg2' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename the decoder of 'gpr2.reg2' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Comment the decoder of 'gpr2.reg1' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename the decoder of 'gpr2.reg1' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Comment the decoder of 'gpr4.zero' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename the decoder of 'gpr4.zero' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Comment the decoder of 'gpr4' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename the decoder of 'gpr4' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Comment the decoder of 'gpr3.src.store' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename the decoder of 'gpr3.src.store' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Comment the decoder of 'gpr3' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename the decoder of 'gpr3' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Fix order of extraction function invocations so that extraction
goes from MSB side to LSB side of the given instruction coding
content. This is desireable because of consistency and easier
visual spotting of errors.
After this patch, all such invocations should be in the desired
order.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename more functions that have names that are hard to understand.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename NMD::extract_ft_20_19_18_17_16(uint64 instruction) to
NMD::extract_ft_25_24_23_22_21(uint64 instruction).
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename NMD::extract_fs_15_14_13_12_11(uint64 instruction) to
NMD::extract_fs_20_19_18_17_16(uint64 instruction).
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename NMD::extract_fd_10_9_8_7_6(uint64 instruction) to
NMD::extract_fd_15_14_13_12_11(uint64 instruction).
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Rename some functions that have names that are hard to understand.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Fix order of extraction function invocations so that extraction
goes from MSB side to LSB side of the given instruction coding
content. This is desireable because of consistency and easier
visual spotting of errors.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Fix wrong function name. The convention in these files is that names of
extraction functions should reflect bit patterns they are extracting.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Some functions were not used at all. Compiler doesn't complain
since they are class memebers. Remove them - no future usage is
planned.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Fix several mistakes in preambles of nanomips disassembler source
files.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Use POSIX types and format strings.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
The three-operand MADD and MADDU are specific to R5900 cores.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
The three-operand MADD and MADDU are specific to Sony R5900 core,
and Toshiba TX19/TX39/TX79 cores as well.
The "32-Bit TX System RISC TX39 Family Architecture manual"
is available at https://wiki.qemu.org/File:DSAE0022432.pdf
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Philippe Mathieu-Daudé<f4bug@amsat.org>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Tested-by: Fredrik Noring <noring@nocrew.org>
Add translation handler for S32ALNI MXU instruction.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add translation handlers for six max/min MXU instructions.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add translation handlers for four logic MXU instructions.
It should be noted that there is an error in MXU documentation (dated
June 2017) regarding opcodes for this group of instructions. This was
confirmed by running tests on hardware, and also by looking up other
related public source trees (binutils, Android NDK). In initial MXU
patches to QEMU, opcodes for MXU logic instructions were created to
be in accordance with the MXU documentation, therefore the error from
was propagated. This patch corrects that, changing the involved code.
Besides that, as MXU was designed and implemented only for 32-bit
CPUs, corresponding preprosessor conditions were added around MXU
code, which allows more flexible implementation of MXU handlers.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Improve textual description of MXU extension. These are mostly
comment formatting changes.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add generic naming involving generig suffixes OPTN0, OPTN1, OPTN2,
OPTN3 for four optn2 constants. Existing suffixes WW, LW, HW, XW
are not quite appropriate for some instructions using optn2.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add missing opcodes and decoding engine for LXB, LXH, LXW, LXBU,
and LXHU instructions. They were for some reason forgotten in
previous commits. The MXU opcode list and decoding engine should
be now complete.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
ATOMIC_REG_SIZE is currently defined as the default sizeof(void *) for
all MIPS host builds, including those using the n32 ABI. n32 is the
MIPS64 ILP32 ABI and as such tcg/mips/tcg-target.h defines
TCG_TARGET_REG_BITS as 64 for n32 builds. If we attempt to build QEMU
for an n32 host with support for a 64b target architecture then
TCG_OVERSIZED_GUEST is 0 and accel/tcg/cputlb.c attempts to use
atomic_* functions. This fails because ATOMIC_REG_SIZE is 4, causing
the calls to QEMU_BUILD_BUG_ON(sizeof(*ptr) > ATOMIC_REG_SIZE) in the
various atomic_* functions to generate errors.
Fix this by defining ATOMIC_REG_SIZE as 8 for all MIPS64 builds, which
will cover both n32 (ILP32) & n64 (LP64) ABIs in much the same was as
we already do for x86_64/x32.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Paul Burton <pburton@wavecomp.com>
Add Aleksandar Rikalo as a reviewer for MIPS content. Aleksandar
brings to us more than six years of experience in working on a variety
of development tools for MIPS architectures, and will greatly help
QEMU community understand and support intricacies of MIPS better.
Acked-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reorder items alphabetically for better visibility.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add ability to redirect mails (sent to qemu-devel) containing
"mips" in the subject line to MIPS maintainers and reviewers.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add following files as maintained within the main MIPS target
section in MAINTAINERS:
default-configs/mips64el-linux-user.mak
default-configs/mips64-linux-user.mak
default-configs/mipsn32el-linux-user.mak
default-configs/mipsn32-linux-user.mak
default-configs/mipsel-linux-user.mak
default-configs/mips-linux-user.mak
default-configs/mips64el-softmmu.mak
default-configs/mips64-softmmu.mak
default-configs/mipsel-softmmu.mak
default-configs/mips-softmmu.mak
default-configs/mips-softmmu-common.mak
Future nanoMIPS user mode will also have its .mak file, and
because of that "*mips*" was used instead of "mips*" as a
shorthand in the new item in MAINTAINERS.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Peter Maydell
yuchenlin
Julio Faracco
Fredrik Noring
Aleksandar Markovic
Stefan Weil
Philippe Mathieu-Daudé
Paul Burton