Commit Graph

3218 Commits

Author SHA1 Message Date
Paolo Bonzini 63fd8ef080 target/i386: implement SYSCALL/SYSRET in 32-bit emulators
AMD supports both 32-bit and 64-bit SYSCALL/SYSRET, but the TCG only
exposes it for 64-bit targets.  For system emulation just reuse the
helper; for user-mode emulation the ABI is the same as "int $80".

The BSDs does not support any fast system call mechanism in 32-bit
mode so add to bsd-user the same stub that FreeBSD has for 64-bit
compatibility mode.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26 10:23:56 +02:00
Andreas Schwab 7f750efcaa linux-user, bsd-user: Preserve incoming order of environment variables in the target
Do not reverse the order of environment variables in the target environ
array relative to the incoming environ order.  Some testsuites depend on a
specific order, even though it is not defined by any standard.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <mvmlejfsivd.fsf@suse.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-06-13 11:28:53 +02:00
Andrew Jeffery e928907105 linux-user: elfload: Specify -R is an option for qemu-user binaries
Given several different concepts are suggested for investigation, let's
not confuse e.g. ulimit's -R with what was actually intended.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-06-10 09:40:46 +03:00
Andrew Jeffery f101c25cd6 linux-user: elfload: s/min_mmap_addr/mmap_min_addr/
As-is the error message can cause some confusion as the mentioned sysctl
attribute name is wrong:

https://www.kernel.org/doc/html/latest/admin-guide/sysctl/vm.html#mmap-min-addr

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-06-10 09:38:48 +03:00
Peter Maydell 8fbf89a966 linux-user: Return EINVAL for getgroups() with negative gidsetsize
Coverity doesn't like the way we might end up calling getgroups()
with a NULL grouplist pointer. This is fine for the special case
of gidsetsize == 0, but we will also do it if the guest passes
us a negative gidsetsize. (CID 1512465)

Explicitly fail the negative gidsetsize with EINVAL, as the kernel
does. This means we definitely only call the libc getgroups()
with valid parameters. It also brings the getgroups() code in
to line with the setgroups() code.

Possibly Coverity may still complain about getgroups(0, NULL), but
that would be a false positive.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-06-10 00:00:24 +03:00
Michael Tokarev 725160fe56 linux-user: add comments for TARGET_NR_[gs]etgroups{,32}
There are 2 pairs of identical code (with different types)
for TARGET_NR_setgroups & TARGET_NR_setgroups32, and
for TARGET_NR_getgroups & TARGET_NR_getgroups32.  Add
comments stating this fact, so that further modifications
are done in two places.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-06-09 23:59:11 +03:00
Ilya Leoshkevich 1fb9bdaf59 linux-user: Emulate /proc/cpuinfo on s390x
Some s390x userspace programs are confused when seeing a foreign
/proc/cpuinfo [1]. Add the emulation for s390x; follow the respective
kernel code structure where possible.

Output example:

	vendor_id       : IBM/S390
	# processors    : 12
	bogomips per cpu: 13370.00
	max thread id   : 0
	features	: esan3 zarch stfle msa
	facilities      : 0 1 2 3 4 7 9 16 17 18 19 21 22 24 25 27 30 31 32 33 34 35 37 40 41 45 49 51 52 53 57 58 61 69 71 72 75 76 77 129 130 131 135 138 146 148
	processor 0: version = 00,  identification = 000000,  machine = 8561
	processor 1: version = 00,  identification = 100000,  machine = 8561
	[...]

	cpu number      : 0
	version         : 00
	identification  : 000000
	machine         : 8561

	cpu number      : 1
	version         : 00
	identification  : 100000
	machine         : 8561
	[...]

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2211472

Reported-by: Tulio Magno Quites Machado Filho <tuliom@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230605113950.1169228-5-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-06-05 20:48:34 +02:00
Ilya Leoshkevich e19807bee3 linux-user/elfload: Introduce elf_hwcap_str() on s390x
It is required for implementing /proc/cpuinfo emulation.

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230605113950.1169228-4-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-06-05 20:48:34 +02:00
Ilya Leoshkevich e1b819c804 linux-user/elfload: Expose get_elf_hwcap() on s390x
It is required for implementing /proc/cpuinfo emulation.

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230605113950.1169228-3-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-06-05 20:48:34 +02:00
Ilya Leoshkevich 01b9990a3f linux-user/s390x: Fix single-stepping SVC
Currently single-stepping SVC executes two instructions. The reason is
that EXCP_DEBUG for the SVC instruction itself is masked by EXCP_SVC.
Fix by re-raising EXCP_DEBUG.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230510230213.330134-2-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-06-05 07:27:23 +02:00
Richard Henderson 449d6d9eb4 Hexagon update
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Merge tag 'pull-hex-20230518-1' of https://github.com/quic/qemu into staging

Hexagon update

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# gpg:                using RSA key 3635C788CE62B91FD4C59AB47B0244FB12DE4422
# gpg: Good signature from "Taylor Simpson (Rock on) <tsimpson@quicinc.com>" [unknown]
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* tag 'pull-hex-20230518-1' of https://github.com/quic/qemu: (44 commits)
  Hexagon (linux-user/hexagon): handle breakpoints
  Hexagon (gdbstub): add HVX support
  Hexagon (gdbstub): fix p3:0 read and write via stub
  Hexagon: add core gdbstub xml data for LLDB
  gdbstub: add test for untimely stop-reply packets
  gdbstub: only send stop-reply packets when allowed to
  Remove test_vshuff from hvx_misc tests
  Hexagon (decode): look for pkts with multiple insns at the same slot
  Hexagon (iclass): update J4_hintjumpr slot constraints
  Hexagon: append eflags to unknown cpu model string
  Hexagon: list available CPUs with `-cpu help`
  Hexagon (target/hexagon/*.py): raise exception on reg parsing error
  target/hexagon: fix = vs. == mishap
  Hexagon (target/hexagon) Additional instructions handled by idef-parser
  Hexagon (target/hexagon) Move items to DisasContext
  Hexagon (target/hexagon) Move pkt_has_store_s1 to DisasContext
  Hexagon (target/hexagon) Move pred_written to DisasContext
  Hexagon (target/hexagon) Move new_pred_value to DisasContext
  Hexagon (target/hexagon) Move new_value to DisasContext
  Hexagon (target/hexagon) Make special new_value for USR
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-05-18 20:44:34 -07:00
Matheus Tavares Bernardino 9073bfd725 Hexagon (linux-user/hexagon): handle breakpoints
This enables LLDB to work with hexagon linux-user mode through the GDB
remote protocol.

Helped-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <c287a129dcbe7d974d8b7608e8672d34a3c91c04.1683214375.git.quic_mathbern@quicinc.com>
2023-05-18 12:40:52 -07:00
Matheus Tavares Bernardino 3128588232 Hexagon: append eflags to unknown cpu model string
Running qemu-hexagon with a binary that was compiled for an arch version
unknown by qemu can produce a somewhat confusing message:

  qemu-hexagon: unable to find CPU model 'unknown'

Let's give a bit more info by appending the eflags so that the message
becomes:

  qemu-hexagon: unable to find CPU model 'unknown (0x69)'

Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Tested-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <8a8d013cc619b94fd4fb577ae6a8df26cedb972b.1683225804.git.quic_mathbern@quicinc.com>
2023-05-18 12:40:52 -07:00
Taylor Simpson fc2622f660 Hexagon (target/hexagon) Add support for v68/v69/v71/v73
Add support for the ELF flags
Move target/hexagon/cpu.[ch] to be v73
Change the compiler flag used by "make check-tcg"

The decbin instruction is removed in Hexagon v73, so check the
version before trying to compile the instruction.

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230427224057.3766963-2-tsimpson@quicinc.com>
2023-05-18 12:40:51 -07:00
Richard Henderson 19200a0edf linux-user pull request 20230512-v4
add open_tree(), move_mount()
 add /proc/cpuinfo for riscv
 fixes and cleanup
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Merge tag 'linux-user-for-8.1-pull-request' of https://github.com/vivier/qemu into staging

linux-user pull request 20230512-v4

add open_tree(), move_mount()
add /proc/cpuinfo for riscv
fixes and cleanup

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# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [undefined]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [undefined]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [undefined]
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* tag 'linux-user-for-8.1-pull-request' of https://github.com/vivier/qemu:
  linux-user: fix getgroups/setgroups allocations
  linux-user: Fix mips fp64 executables loading
  linux-user: Don't require PROT_READ for mincore
  linux-user: Add new flag VERIFY_NONE
  linux-user/main: Use list_cpus() instead of cpu_list()
  linux-user: Add open_tree() syscall
  linux-user: Add move_mount() syscall
  linux-user: report ENOTTY for unknown ioctls
  linux-user: Emulate /proc/cpuinfo output for riscv

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-05-17 05:42:14 -07:00
Michael Tokarev 1e35d32789 linux-user: fix getgroups/setgroups allocations
linux-user getgroups(), setgroups(), getgroups32() and setgroups32()
used alloca() to allocate grouplist arrays, with unchecked gidsetsize
coming from the "guest".  With NGROUPS_MAX being 65536 (linux, and it
is common for an application to allocate NGROUPS_MAX for getgroups()),
this means a typical allocation is half the megabyte on the stack.
Which just overflows stack, which leads to immediate SIGSEGV in actual
system getgroups() implementation.

An example of such issue is aptitude, eg
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=811087#72

Cap gidsetsize to NGROUPS_MAX (return EINVAL if it is larger than that),
and use heap allocation for grouplist instead of alloca().  While at it,
fix coding style and make all 4 implementations identical.

Try to not impose random limits - for example, allow gidsetsize to be
negative for getgroups() - just do not allocate negative-sized grouplist
in this case but still do actual getgroups() call.  But do not allow
negative gidsetsize for setgroups() since its argument is unsigned.

Capping by NGROUPS_MAX seems a bit arbitrary, - we can do more, it is
not an error if set size will be NGROUPS_MAX+1. But we should not allow
integer overflow for the array being allocated. Maybe it is enough to
just call g_try_new() and return ENOMEM if it fails.

Maybe there's also no need to convert setgroups() since this one is
usually smaller and known beforehand (KERN_NGROUPS_MAX is actually 63, -
this is apparently a kernel-imposed limit for runtime group set).

The patch fixes aptitude segfault mentioned above.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Message-Id: <20230409105327.1273372-1-mjt@msgid.tls.msk.ru>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Daniil Kovalev a0f8d2701b linux-user: Fix mips fp64 executables loading
If a program requires fr1, we should set the FR bit of CP0 control status
register and add F64 hardware flag. The corresponding `else if` branch
statement is copied from the linux kernel sources (see `arch_check_elf` function
in linux/arch/mips/kernel/elf.c).

Signed-off-by: Daniil Kovalev <dkovalev@compiler-toolchain-for.me>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20230404052153.16617-1-dkovalev@compiler-toolchain-for.me>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Thomas Weißschuh f443a26cc6 linux-user: Don't require PROT_READ for mincore
The kernel does not require PROT_READ for addresses passed to mincore.
For example the fincore(1) tool from util-linux uses PROT_NONE and
currently does not work under qemu-user.

Example (with fincore(1) from util-linux 2.38):

$ fincore /proc/self/exe
RES PAGES  SIZE FILE
24K     6 22.1K /proc/self/exe

$ qemu-x86_64 /usr/bin/fincore /proc/self/exe
fincore: failed to do mincore: /proc/self/exe: Cannot allocate memory

With this patch:

$ ./build/qemu-x86_64 /usr/bin/fincore /proc/self/exe
RES PAGES  SIZE FILE
24K     6 22.1K /proc/self/exe

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230422100314.1650-3-thomas@t-8ch.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Thomas Weißschuh 64d06015f6 linux-user: Add new flag VERIFY_NONE
This can be used to validate that an address range is mapped but without
being readable or writable.

It will be used by an updated implementation of mincore().

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230422100314.1650-2-thomas@t-8ch.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Thomas Huth b67e5cb43b linux-user/main: Use list_cpus() instead of cpu_list()
This way we can get rid of the if'deffery and the XXX comment
here (it's repeated in the list_cpus() function anyway).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230424122126.236586-1-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Thomas Weißschuh 7f696cddd9 linux-user: Add open_tree() syscall
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230424153429.276788-2-thomas@t-8ch.de>
[lv: move declaration at the beginning of the block,
     define syscall]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Thomas Weißschuh 4b2d2753e8 linux-user: Add move_mount() syscall
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
[lv: define syscall]
Message-Id: <20230424153429.276788-1-thomas@t-8ch.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Thomas Weißschuh 59d1172776 linux-user: report ENOTTY for unknown ioctls
The correct error number for unknown ioctls is ENOTTY.

ENOSYS would mean that the ioctl() syscall itself is not implemented,
which is very improbable and unexpected for userspace.

ENOTTY means "Inappropriate ioctl for device". This is what the kernel
returns on unknown ioctls, what qemu is trying to express and what
userspace is prepared to handle.

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230426070659.80649-1-thomas@t-8ch.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:20:29 +02:00
Afonso Bordado 8ddc171b7b linux-user: Emulate /proc/cpuinfo output for riscv
RISC-V does not expose all extensions via hwcaps, thus some userspace
applications may want to query these via /proc/cpuinfo.

Currently when querying this file the host's file is shown instead
which is slightly confusing. Emulate a basic /proc/cpuinfo file
with mmu info and an ISA string.

Signed-off-by: Afonso Bordado <afonsobordado@gmail.com>
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Message-Id: <167873059442.9885.15152085316575248452-0@git.sr.ht>
[lv: removed the test that fails in CI for unknown reason]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-17 07:19:47 +02:00
Jamie Iles 370ed60029 cpu: expose qemu_cpu_list_lock for lock-guard use
Expose qemu_cpu_list_lock globally so that we can use
WITH_QEMU_LOCK_GUARD and QEMU_LOCK_GUARD to simplify a few code paths
now and in future.

Signed-off-by: Jamie Iles <quic_jiles@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427020925.51003-2-quic_jiles@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-05-11 09:53:41 +01:00
Richard Henderson b6235a759a disas: Remove target_ulong from the interface
Use uint64_t for the pc, and size_t for the size.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230503072331.1747057-81-richard.henderson@linaro.org>
2023-05-11 09:49:51 +01:00
Richard Henderson 792f77f376 Add LoongArch LSX instructions.
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Merge tag 'pull-loongarch-20230506' of https://gitlab.com/gaosong/qemu into staging

Add LoongArch LSX instructions.

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* tag 'pull-loongarch-20230506' of https://gitlab.com/gaosong/qemu: (45 commits)
  hw/intc: don't use target_ulong for LoongArch ipi
  target/loongarch: CPUCFG support LSX
  target/loongarch: Use {set/get}_gpr replace to cpu_fpr
  target/loongarch: Implement vldi
  target/loongarch: Implement vld vst
  target/loongarch: Implement vilvl vilvh vextrins vshuf
  target/loongarch: Implement vreplve vpack vpick
  target/loongarch: Implement vinsgr2vr vpickve2gr vreplgr2vr
  target/loongarch: Implement vbitsel vset
  target/loongarch: Implement vfcmp
  target/loongarch: Implement vseq vsle vslt
  target/loongarch: Implement LSX fpu fcvt instructions
  target/loongarch: Implement LSX fpu arith instructions
  target/loongarch: Implement vfrstp
  target/loongarch: Implement vbitclr vbitset vbitrev
  target/loongarch: Implement vpcnt
  target/loongarch: Implement vclo vclz
  target/loongarch: Implement vssrlrn vssrarn
  target/loongarch: Implement vssrln vssran
  target/loongarch: Implement vsrlrn vsrarn
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-05-06 08:11:52 +01:00
Song Gao 16f5396cec
target/loongarch: Add LSX data type VReg
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-2-gaosong@loongson.cn>
2023-05-06 11:19:42 +08:00
Harsh Prateek Bora 2060436aab ppc: spapr: cleanup cr get/set with helpers.
The bits in cr reg are grouped into eight 4-bit fields represented
by env->crf[8] and the related calculations should be abstracted to
keep the calling routines simpler to read. This is a step towards
cleaning up the related/calling code for better readability.

Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230503093619.2530487-2-harshpb@linux.ibm.com>
[danielhb: add 'const' modifier to fix linux-user build]
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2023-05-05 12:34:22 -03:00
Peter Maydell e99c1f89b2 linux-user: Add '-one-insn-per-tb' option equivalent to '-singlestep'
The '-singlestep' option is confusing, because it doesn't actually
have anything to do with single-stepping the CPU. What it does do
is force TCG emulation to put one guest instruction in each TB,
which can be useful in some situations.

Create a new command line argument -one-insn-per-tb, so we can
document that -singlestep is just a deprecated synonym for it,
and eventually perhaps drop it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230417164041.684562-5-peter.maydell@linaro.org
2023-05-02 15:47:40 +01:00
Peter Maydell 0e33928cd9 accel/tcg: Use one_insn_per_tb global instead of old singlestep global
The only place left that looks at the old 'singlestep' global
variable is the TCG curr_cflags() function.  Replace the old global
with a new 'one_insn_per_tb' which is defined in tcg-all.c and
declared in accel/tcg/internal.h.  This keeps it restricted to the
TCG code, unlike 'singlestep' which was available to every file in
the system and defined in multiple different places for softmmu vs
linux-user vs bsd-user.

While we're making this change, use qatomic_read() and qatomic_set()
on the accesses to the new global, because TCG will read it without
holding a lock.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230417164041.684562-4-peter.maydell@linaro.org
2023-05-02 15:47:40 +01:00
Peter Maydell 3cfb0456c3 make one-insn-per-tb an accel option
This commit adds 'one-insn-per-tb' as a property on the TCG
accelerator object, so you can enable it with
   -accel tcg,one-insn-per-tb=on

It has the same behaviour as the existing '-singlestep' command line
option.  We use a different name because 'singlestep' has always been
a confusing choice, because it doesn't have anything to do with
single-stepping the CPU.  What it does do is force TCG emulation to
put one guest instruction in each TB, which can be useful in some
situations (such as analysing debug logs).

The existing '-singlestep' commandline options are decoupled from the
global 'singlestep' variable and instead now are syntactic sugar for
setting the accel property.  (These can then go away after a
deprecation period.)

The global variable remains for the moment as:
 * what the TCG code looks at to change its behaviour
 * what HMP and QMP use to query and set the behaviour

In the following commits we'll clean those up to not directly
look at the global variable.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230417164041.684562-2-peter.maydell@linaro.org
2023-05-02 15:47:40 +01:00
Richard Henderson 6cda41daa2 Revert "linux-user/arm: Take more care allocating commpage"
This reverts commit 4f5c67f8df.

This exposes bugs in target_mmap et al with respect to overflow
with the final page of the guest address space.  To be fixed in
the next development cycle.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-04-04 07:48:27 -07:00
Philippe Mathieu-Daudé 450cb7ec2c linux-user/mips: Use P5600 as default CPU to run NaN2008 ELF binaries
Per the release 6.06 revision history:

 5.03 August 21, 2013

 • ABS2008 and NAN2008 fields of Table 5.7 “FCSR RegisterField
   Descriptions” were optional in release 3 and could be R/W,
   but as of release 5 are required, read-only, and preset by
   hardware.

The P5600 core implements the release 5, and has the ABS2008
and NAN2008 bits set in CP1_fcr31. Therefore it is able to run
ELF binaries compiled with EF_MIPS_NAN2008, such the CIP United
Debian NaN2008 distribution:
http://repo.oss.cipunited.com/mipsel-nan2008/README.txt

In order to run such compiled binaries, select by default the
P5600 core when the ELF 'MIPS_NAN2008' flag is set.

Reported-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230327162444.388-1-philmd@linaro.org>
2023-03-30 15:03:28 +02:00
Philippe Mathieu-Daudé baead64297 linux-user/sparc: Don't use 16-bit UIDs on SPARC V9
The 64-bit SPARC V9 syscall ABI uses 32-bit UIDs. Only enable
the 16-bit UID wrappers for 32-bit SPARC (V7 and V8).

Possibly missed in commit 992f48a036 ("Support for 32 bit
ABI on 64 bit targets (only enabled Sparc64)").

Reported-by: Gregor Riepl <onitake@gmail.com>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: Zach van Rijn <me@zv.io>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1394
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230327131910.78564-1-philmd@linaro.org>
2023-03-30 15:03:23 +02:00
Richard Henderson 4f5c67f8df linux-user/arm: Take more care allocating commpage
User setting of -R reserved_va can lead to an assertion
failure in page_set_flags.  Sanity check the value of
reserved_va and print an error message instead.  Do not
allocate a commpage at all for m-profile cpus.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Richard Henderson 95059f9c31 include/exec: Change reserved_va semantics to last byte
Change the semantics to be the last byte of the guest va, rather
than the following byte.  This avoids some overflow conditions.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Richard Henderson a3a67f54f0 linux-user: Pass last not end to probe_guest_base
Pass the address of the last byte of the image, rather than
the first address past the last byte.  This avoids overflow
when the last page of the address space is involved.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Richard Henderson 10310cbd62 accel/tcg: Pass last not end to page_reset_target_data
Pass the address of the last byte to be changed, rather than
the first address past the last byte.  This avoids overflow
when the last page of the address space is involved.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Richard Henderson 49840a4a09 accel/tcg: Pass last not end to page_set_flags
Pass the address of the last byte to be changed, rather than
the first address past the last byte.  This avoids overflow
when the last page of the address space is involved.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1528
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Richard Henderson 2f7828b572 linux-user: Diagnose misaligned -R size
We have been enforcing host page alignment for the non-R
fallback of MAX_RESERVED_VA, but failing to enforce for -R.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Richard Henderson 720ace24ae *: Add missing includes of qemu/plugin.h
This had been pulled in from hw/core/cpu.h,
but that will be removed.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230310195252.210956-6-richard.henderson@linaro.org>
[AJB: also syscall-trace.h]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230315174331.2959-16-alex.bennee@linaro.org>
Reviewed-by: Emilio Cota <cota@braap.org>
2023-03-22 15:06:57 +00:00
Richard Henderson cc37d98bfb *: Add missing includes of qemu/error-report.h
This had been pulled in via qemu/plugin.h from hw/core/cpu.h,
but that will be removed.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230310195252.210956-5-richard.henderson@linaro.org>
[AJB: add various additional cases shown by CI]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230315174331.2959-15-alex.bennee@linaro.org>
Reviewed-by: Emilio Cota <cota@braap.org>
2023-03-22 15:06:57 +00:00
Peter Maydell 29c8a9e31a Pull request linux-user 20230308-v2
Fix gdt on i386/x86_64
 Handle traps on sparc
 Add translation for argument of msync
 Emulate CLONE_PIDFD flag in clone
 handle netlink flag NLA_F_NESTED
 fix sockaddr_in6 endianness
 Fix brk() to release pages
 fill out task state in /proc/self/stat
 add support for xtensa FDPIC
 Fix unaligned memory access in prlimit64 syscall
 add target to host netlink conversions
 fix timerfd read endianness conversion
 Fix access to /proc/self/exe
 Add strace for prlimit64() syscall
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Merge tag 'linux-user-for-8.0-pull-request' of https://gitlab.com/laurent_vivier/qemu into staging

Pull request linux-user 20230308-v2

Fix gdt on i386/x86_64
Handle traps on sparc
Add translation for argument of msync
Emulate CLONE_PIDFD flag in clone
handle netlink flag NLA_F_NESTED
fix sockaddr_in6 endianness
Fix brk() to release pages
fill out task state in /proc/self/stat
add support for xtensa FDPIC
Fix unaligned memory access in prlimit64 syscall
add target to host netlink conversions
fix timerfd read endianness conversion
Fix access to /proc/self/exe
Add strace for prlimit64() syscall

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# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* tag 'linux-user-for-8.0-pull-request' of https://gitlab.com/laurent_vivier/qemu: (28 commits)
  linux-user: fix bug about incorrect base addresss of gdt on i386 and x86_64
  linux-user/sparc: Handle tag overflow traps
  linux-user/sparc: Handle floating-point exceptions
  linux-user/sparc: Handle unimplemented flush trap
  linux-user/sparc: Handle coprocessor disabled trap
  linux-user/sparc: Handle privilidged action trap
  linux-user/sparc: Handle priviledged opcode trap
  linux-user/sparc: Handle getcc, setcc, getpsr traps
  linux-user/sparc: Handle division by zero traps
  linux-user/sparc: Handle software breakpoint trap
  linux-user/sparc: Fix sparc64_{get, set}_context traps
  linux-user/sparc: Tidy window spill/fill traps
  linux-user/sparc: Use TT_TRAP for flush windows
  linux-user/sparc: Tidy syscall error return
  linux-user/sparc: Tidy syscall trap
  linux-user: Emulate CLONE_PIDFD flag in clone()
  linux-user: Add translation for argument of msync()
  linux-user: handle netlink flag NLA_F_NESTED
  linux-user: fix sockaddr_in6 endianness
  linux-user: Add strace for prlimit64() syscall
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-03-12 10:57:00 +00:00
fanwj@mail.ustc.edu.cn 2732c739d8 linux-user: fix bug about incorrect base addresss of gdt on i386 and x86_64
On linux user mode, CPUX86State::gdt::base from Different CPUX86State
Objects have same value, It is incorrect! Every CPUX86State::gdt::base
Must points to independent memory space.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1405
Signed-off-by: fanwenjie <fanwj@mail.ustc.edu.cn>
Message-Id: <4172b90.58b08.18631b77860.Coremail.fanwj@mail.ustc.edu.cn>
[lv: remove unnecessary casts, split overlong line]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10 20:50:11 +01:00
Richard Henderson e64c6d42b6 linux-user/sparc: Handle tag overflow traps
This trap is raised by taddcctv and tsubcctv insns.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-16-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10 20:45:47 +01:00
Richard Henderson 4ea3af392f linux-user/sparc: Handle floating-point exceptions
Raise SIGFPE for ieee exceptions.

The other types, such as FSR_FTT_UNIMPFPOP, should not appear,
because we enable normal emulation of missing insns at the
start of sparc_cpu_realizefn().

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-15-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10 20:45:47 +01:00
Richard Henderson 81f04cd34c linux-user/sparc: Handle unimplemented flush trap
For sparc64, TT_UNIMP_FLUSH == TT_ILL_INSN, so this is
already handled.  For sparc32, the kernel uses SKIP_TRAP.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-14-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10 20:45:47 +01:00
Richard Henderson c47d7c87bf linux-user/sparc: Handle coprocessor disabled trap
Since qemu does not implement a sparc coprocessor, all such
instructions raise this trap.  Because of that, we never raise
the coprocessor exception trap, which would be vector 0x28.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-13-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10 20:45:47 +01:00
Richard Henderson 235f33b818 linux-user/sparc: Handle privilidged action trap
This is raised by using an %asi < 0x80 in user-mode.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-12-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10 20:45:47 +01:00