Commit graph

115 commits

Author SHA1 Message Date
Richard Henderson bca82cde84
tcg: Hoist max_insns computation to tb_gen_code
In order to handle TB's that translate to too much code, we
need to place the control of the length of the translation
in the hands of the code gen master loop.

Backports commit 8b86d6d25807e13a63ab6ea879f976b9f18cc45a from qemu
2019-04-30 09:49:57 -04:00
Lioncash 7a6f61057b
target/m68k: Correct instruction emulation
Previously we weren't even initializing the instruction table, so any
attempt at emulation would cause a segmentation fault.

This also moves the end address check after the decoding to correctly
perform exiting behavior with the new translator model.
2019-02-28 19:21:49 -05:00
Thomas Huth a0489c8849
target/m68k: Fix LGPL information in the file headers
It's either "GNU *Library* General Public License version 2" or
"GNU Lesser General Public License version *2.1*", but there was
no "version 2.0" of the "Lesser" license. So assume that version
2.1 is meant here.
Also some files mention the GPL instead of the LGPL after declaring
that the files are licensed under the LGPL, so change these spots to
use LGPL, too.

Backports commit d749fb85bd35f2f175a4ed3d170561e4f54f7297 from qemu
2019-02-03 17:55:29 -05:00
Lioncash 29d84a9296
target: Resolve repeated typedef warnings 2019-01-22 20:27:35 -05:00
Lioncash 1c0e09c467
m68k: Silence compiler warnings 2018-11-16 21:23:55 -05:00
Laurent Vivier 26d8891d1b
target/m68k: use EXCP_ILLEGAL instead of EXCP_UNSUPPORTED
Coldfire defines an "Unsupported instruction" exception if execution
of a valid instruction is attempted but the required hardware is not
present in the processor.

We use it with instructions that are in fact undefined or illegal,
and the exception expected in this case by the kernel is the
illegal exception, so this patch fixes that.

Backports commit b9f8e55bf7e994e192ab7360830731580384b813 from qemu
2018-11-11 08:30:57 -05:00
Catena cyber 4199ce83bb
Removes accessible assert
Backports commit 333bfdf65e55bcf6e3b03526a50f8c43aa6d4ca5 from qemu
2018-10-06 05:02:20 -04:00
Catena cyber e3b8ea18bf
Prevents abort with m68K
* Prevents abort with m68K

Raises exception instead

* M68K remove one uses of abort

* Less aborts and logs instead for M68K

Backports commit 910999d3969b682d8376db1266f9885866cd785c from unicorn
2018-10-06 04:59:11 -04:00
Lioncash a61df86ef5
m68k/translate: Remove commented out code in m68k_tcg_init()
This isn't even in the main qemu repo, so we can get rid of this.
2018-10-06 02:41:09 -04:00
Lioncash 44ca501cd3
target/m68k: Fix initialization of m68k targets
m68k is now able to be used for emulation again. It just needed to
properly have the unicorn context be set within the base type for the
CPUs
2018-09-03 17:04:42 -04:00
Richard Henderson 1a91edd263
target/m68k: Merge disas_m68k_insn into m68k_tr_translate_insn
Backports commit a56f36c1d2bccbc50a53fa8093b93d205607f1b8 from qemu
2018-06-15 11:40:18 -04:00
Richard Henderson a8540a30d2
target/m68k: Improve ending TB at page boundaries
Rather than limit total TB size to PAGE-32 bytes, end the TB when
near the end of a page. This should provide proper semantics of
SIGSEGV when executing near the end of a page.

Backports commit 4c7a0f6f34869b3dfe7091d28ff27a8dfbdd8b70 from qemu
2018-06-15 11:36:08 -04:00
Richard Henderson c42ca54685
target/m68k: Convert to TranslatorOps
Backports commit 11ab74b01e0a8ea4973eed89c6b90fa6e4fb9fb6 from qemu
2018-06-15 11:35:31 -04:00
Richard Henderson f4432cbca7
target/m68k: Convert to DisasContextBase
Removed ctx->insn_pc in favour of ctx->base.pc_next.
Yes, it is annoying, but didn't want to waste its 4 bytes.

Backports commit a575cbe01caecf22ab322a9baa5930a6d9e39ca6 from qemu
2018-06-15 11:25:23 -04:00
Richard Henderson 0445fcf34a
target/m68k: Rename DISAS_UPDATE and gen_lookup_tb
The name gen_lookup_tb is at odds with tcg_gen_lookup_and_goto_tb.
For these cases, we do indeed want to exit back to the main loop.
Similarly, DISAS_UPDATE performs no actual update, whereas DISAS_EXIT
does what it says.

Backports commit 4106f26e95c83b8759c3fe61a4d3a1fa740db0a9 from qemu
2018-06-15 10:50:34 -04:00
Richard Henderson 90b3770665
target/m68k: Use lookup_and_goto_tb for DISAS_JUMP
These are all indirect or out-of-page direct jumps.
We can indirectly chain to the next TB without going
back to the main loop.

Backports commit 8aaf7da9c3b1f282b5a123de3e87a2e6ca87f3b9 from qemu
2018-06-15 10:48:18 -04:00
Richard Henderson c2fe05f7d9
target/m68k: Remove DISAS_JUMP_NEXT as unused
Backports commit 707ddb5ac6f91309ff6ed6bec988ed8100846f50 from qemu
2018-06-15 10:46:26 -04:00
Richard Henderson 76b8bd614d
target/m68k: Replace DISAS_TB_JUMP with DISAS_NORETURN
We have exited the TB after using goto_tb; there is no
distinction from DISAS_NORETURN.

Backports commit 825340f5659647deb62743c3cb479ec8d78f1862 from qemu
2018-06-15 10:45:33 -04:00
Richard Henderson 3c01ea765d
target/m68k: Use DISAS_NORETURN for exceptions
The raise_exception helper does not return. Do not generate
any code following that.

Backports commit cb4add334a5a8db263c20c33c5365be3868f8967 from qemu
2018-06-15 10:44:07 -04:00
Philippe Mathieu-Daudé 145174a359
target/m68k: Add trailing '\n' to qemu_log() call
Backports commit 21528149eba03fc17f428a8e1660d8666683ca85 from qemu
2018-06-08 19:25:21 -04:00
Richard Henderson 10e2b13650
tcg: Pass tb and index to tcg_gen_exit_tb separately
Do the cast to uintptr_t within the helper, so that the compiler
can type check the pointer argument. We can also do some more
sanity checking of the index argument.

Backports commit 07ea28b41830f946de3841b0ac61a3413679feb9 from qemu
2018-06-07 11:56:32 -04:00
Emilio G. Cota 7e8902eccc
tcg: fix s/compliment/complement/ typos
Backports commit 1d349821551c2da4dfefe36c6ac17319f33ebbd5 from qemu
2018-05-22 00:29:51 -04:00
Richard Henderson 4e9ca91bb2
target/m68k: Use floatX_silence_nan when we have already checked for SNaN
Backports commit 1c0c951f717e66b4be45611c0d6661a2dff4241c from qemu
2018-05-19 23:23:56 -04:00
Laurent Vivier 664396a635
m68k: fix floatx80_mod() (Coverity CID1390568)
Update the variable checked by the loop condition (expDiff).
Backport the update from Previous.

Fixes: 591596b77a ("target/m68k: add fmod/frem")

Backports commit 5a73e7f313da0e4657bcac61b533ced71b0d0224 from qemu
2018-05-15 07:44:12 -04:00
Richard Henderson 991683af73
target/m68k: Fix build Werror with gcc 8.0.1
The Werror stems from the compiler finding a path through the second
switch via a missing default case in which src1 is uninitialized, and
not being able to prove that the missing default case is unreachable
due to the first switch.

Simplify the second switch to merge default with OS_LONG,
which returns directly. This removes the unreachable path.

Backports commit 5cbc61110738accb16ff8ed1f08a32906d02790f from qemu.
2018-05-11 10:37:45 -04:00
Laurent Vivier 97c8507f00
m68k: remove dead code (Coverity CID1390617)
floatx80_sin() and floatx80_cos() are derived from one
sincos() function. They have both unused code coming from
their common origin. Remove it.

Backports commit 6361d2984ce88912976a34e1797a5ad5139c649b from qemu
2018-05-01 11:44:18 -04:00
Laurent Vivier ebf0c8f9ca
m68k: Fix floatx80_lognp1 (Coverity CID1390587)
return the result of packFloatx80() instead of
dropping it.

Backports commit 981348af5c3c72335d95f6877abf702d80176eb3 from qemu
2018-05-01 11:41:07 -04:00
Pavel Dovgalyuk bf16c6daee
m68k: fix subx mem, mem instruction
This patch fixes decrement of the pointers for subx mem, mem instructions.
Without the patch pointers are decremented by OS_* constant value instead of
retrieving the corresponding data size and using it as a decrement.

Backports commit 355d4d1c00e708907ff391c24ca708f1c9c06bf0 from qemu
2018-05-01 11:40:00 -04:00
Pavel Dovgalyuk fe353764e9
m68k: fix exception stack frame for 68000
68000 CPUs do not save format in the exception stack frame.
This patch adds feature checking to prevent format saving for 68000.
m68k_ret() already includes this modification, this patch fixes
the exception processing function too.

Backports commit 000761dc0c97d70e7314db3e8f52783880325a22 from qemu
2018-04-16 13:49:56 -04:00
Pavel Dovgalyuk b4bf3c776b
icount: fix cpu_restore_state_from_tb for non-tb-exit cases
In icount mode, instructions that access io memory spaces in the middle
of the translation block invoke TB recompilation. After recompilation,
such instructions become last in the TB and are allowed to access io
memory spaces.

When the code includes instruction like i386 'xchg eax, 0xffffd080'
which accesses APIC, QEMU goes into an infinite loop of the recompilation.

This instruction includes two memory accesses - one read and one write.
After the first access, APIC calls cpu_report_tpr_access, which restores
the CPU state to get the current eip. But cpu_restore_state_from_tb
resets the cpu->can_do_io flag which makes the second memory access invalid.
Therefore the second memory access causes a recompilation of the block.
Then these operations repeat again and again.

This patch moves resetting cpu->can_do_io flag from
cpu_restore_state_from_tb to cpu_loop_exit* functions.

It also adds a parameter for cpu_restore_state which controls restoring
icount. There is no need to restore icount when we only query CPU state
without breaking the TB. Restoring it in such cases leads to the
incorrect flow of the virtual time.

In most cases new parameter is true (icount should be recalculated).
But there are two cases in i386 and openrisc when the CPU state is only
queried without the need to break the TB. This patch fixes both of
these cases.

Backports commit afd46fcad2dceffda35c0586f5723c127b6e09d8 from qemu
2018-04-11 20:05:40 -04:00
Bharata B Rao e373c001fa
cpu: Add Error argument to cpu_exec_init()
Add an Error argument to cpu_exec_init() to let users collect the
error. This is in preparation to change the CPU enumeration logic
in cpu_exec_init(). With the new enumeration logic, cpu_exec_init()
can fail if cpu_index values corresponding to max_cpus have already
been handed out.

Since all current callers of cpu_exec_init() are from instance_init,
use error_abort Error argument to abort in case of an error.

Backports commit 5a790cc4b942e651fec7edc597c19b637fad5a76 from qemu
2018-03-21 07:50:33 -04:00
Laurent Vivier c133a7b306
target/m68k: add a mechanism to automatically free TCGv
SRC_EA() and gen_extend() can return either a temporary
TCGv or a memory allocated one. Mark them when they are
allocated, and free them automatically at end of the
instruction translation.

We want to free locally allocated TCGv to avoid
overflow in sequence like:

0xc00ae406: movel %fp@(-132),%fp@(-268)
0xc00ae40c: movel %fp@(-128),%fp@(-264)
0xc00ae412: movel %fp@(-20),%fp@(-212)
0xc00ae418: movel %fp@(-16),%fp@(-208)
0xc00ae41e: movel %fp@(-60),%fp@(-220)
0xc00ae424: movel %fp@(-56),%fp@(-216)
0xc00ae42a: movel %fp@(-124),%fp@(-252)
0xc00ae430: movel %fp@(-120),%fp@(-248)
0xc00ae436: movel %fp@(-12),%fp@(-260)
0xc00ae43c: movel %fp@(-8),%fp@(-256)
0xc00ae442: movel %fp@(-52),%fp@(-276)
0xc00ae448: movel %fp@(-48),%fp@(-272)
...

That can fill a lot of TCGv entries in a sequence,
especially since 15fa08f845 ("tcg: Dynamically allocate TCGOps")
we have no limit to fill the TCGOps cache and we can fill
the entire TCG variables array and overflow it.

Backports commit ecc207d2fc1d45fabb16c38742a6675a7ba56cbc from qemu
2018-03-20 14:32:04 -04:00
Igor Mammedov cd27da0d88
cpu: get rid of unused cpu_init() defines
cpu_init(cpu_model) were replaced by cpu_create(cpu_type) so
no users are left, remove it.

Backports commit 3f71e724e283233753f1b5b3d6a30948d3084636 from qemu
2018-03-20 14:21:45 -04:00
Igor Mammedov f86355f82c
cpu: add CPU_RESOLVING_TYPE macro
it will be used for providing to cpu name resolving class for
parsing cpu model for system and user emulation code.

Along with change add target to null-machine tests, so
that when switch to CPU_RESOLVING_TYPE happens,
it would ensure that null-machine usecase still works.

Backports commit 0dacec874fa3b3fd34b0d0670fa257efdcbbebd0 from qemu
2018-03-20 11:28:13 -04:00
Igor Mammedov c6dd0d3bef
m68k: cleanup cpu type name composition
use new M68K_CPU_TYPE_NAME to compose CPU type names
and get rid of intermediate M68kCPUInfo/register_cpu_type()
which is replaced by static TypeInfo array.

Backports commit f61797bd947cff86b12036917b35ebc38628e4df from qemu
2018-03-20 08:40:05 -04:00
Eduardo Habkost 074865ff98
cpu: Generify CPU init functions
Backports commits 2994fd96d986578a342f2342501b4ad30f6d0a85,
701e3c78ce45fa630ffc6826c4b9a4218954bc7f, and
d1853231c60d16af78cf4d1608d043614bfbac0b from qemuu
2018-03-20 08:21:51 -04:00
Peter Crosthwaite ce1831bfb4
target-*: Don't redefine cpu_exec()
This function needs to be converted to QOM hook and virtualised for
multi-arch. This rename interferes, as cpu-qom will not have access
to the renaming causing name divergence. This rename doesn't really do
anything anyway so just delete it.

Backports commit 8642c1b81e0418df066a7960a7426d85a923a253 from qemu
2018-03-20 07:02:47 -04:00
Laurent Vivier 5ec082d17c
target/m68k: implement fcosh
Using a local m68k floatx80_cosh()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit 02f9124ebe26c36f0f7ed58085bd963e4372b2cd from qemu
2018-03-17 18:58:57 -04:00
Laurent Vivier 7569530893
target/m68k: implement fsinh
Using a local m68k floatx80_sinh()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit eee6b892a6063c2807ecf33a2f62a8d7cca7652c from qemu
2018-03-17 18:57:16 -04:00
Laurent Vivier a2a662a901
target/m68k: implement ftanh
Using local m68k floatx80_tanh() and floatx80_etoxm1()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit 9937b02965c2a7dbc4b21d98e29b082bab095aa5 from qemu
2018-03-17 18:55:33 -04:00
Laurent Vivier e031b14e4a
target/m68k: implement fatanh
Using a local m68k floatx80_atanh()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit e3655afa137b2e0999537eef273a2845ba21d68c from qemu
2018-03-17 18:54:24 -04:00
Laurent Vivier c900ad13f9
target/m68k: implement facos
Using a local m68k floatx80_acos()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit c84813b807fc82c68ff6d72387f95b15ad283bf6 from qemu
2018-03-17 18:52:27 -04:00
Laurent Vivier 542a863020
target/m68k: implement fasin
Using a local m68k floatx80_asin()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit bc20b34e03b51725d7f008551b5f56f1da07ab6a from qemu
2018-03-17 18:50:30 -04:00
Laurent Vivier 80a2ebf67b
target/m68k: implement fatan
Using a local m68k floatx80_atan()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit 8c992abc892c90caf1d4dd5b4482cda052a280ba from qemu
2018-03-17 18:48:32 -04:00
Laurent Vivier 5630647279
target/m68k: implement fsincos
using floatx80_sin() and floatx80_cos()

Backports commit 47446c9ce34b6685ffe20e829ff6c9aaefd3af0a from qemu
2018-03-17 18:41:30 -04:00
Laurent Vivier 4177dd3ce8
target/m68k: implement fcos
Using a local m68k floatx80_cos()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit 68d0ed37866de2c5cafc4e2589e263961b2e8cd6 from qemu
2018-03-17 18:39:05 -04:00
Laurent Vivier acc9bd1d21
target/m68k: implement fsin
Using a local m68k floatx80_sin()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit 5add1ac42faffd3d3639101fa778dced693a65a3 from qemu
2018-03-17 18:37:01 -04:00
Laurent Vivier caf3cb0571
target/m68k: implement ftan
Using a local m68k floatx80_tan()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Backports commit 273401809c8a8330e5430f2c958467efa7079b2c from qemu
2018-03-17 18:35:01 -04:00
Lioncash 1fe99928c8
target/m68k: Correct M68K_CPU macro parameters in m68k_cpu_handle_mmu_fault in helper.c 2018-03-17 18:31:06 -04:00
Lioncash acb7231650
target/m68k: Correct duplicate conditions in gen_cc_cond 2018-03-17 18:30:33 -04:00