Commit graph

399 commits

Author SHA1 Message Date
Richard Henderson 06f38c6688 linux-user: Rewrite fixed probe_guest_base
Create a set of subroutines to collect a set of guest addresses,
all of which must be mappable on the host.  Use this within the
renamed pgb_fixed subroutine to validate the user's choice of
guest_base specified by the -B command-line option.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:33:22 -07:00
Richard Henderson 0c441aeb39 linux-user: Consolidate guest bounds check in probe_guest_base
The three sets of checks are identical, logically.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Richard Henderson 435c042fdc linux-user: Remove duplicate CPU_LOG_PAGE from probe_guest_base
The proper logging for probe_guest_base is in the main function.
There is no need to duplicate that in the subroutines.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Richard Henderson 3ce3dd8ca9 util/selfmap: Rewrite using qemu/interval-tree.h
We will want to be able to search the set of mappings.
For this patch, the two users iterate the tree in order.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Richard Henderson 5f4e5b3409 linux-user: Use zero_bss for PT_LOAD with no file contents too
If p_filesz == 0, then vaddr_ef == vaddr.  We can reuse the
code in zero_bss rather than incompletely duplicating it in
load_elf_image.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Richard Henderson 2d385be615 linux-user: Do not adjust zero_bss for host page size
Rely on target_mmap to handle guest vs host page size mismatch.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Richard Henderson e3d97d5c5d linux-user: Do not adjust image mapping for host page size
Remove TARGET_ELF_EXEC_PAGESIZE, and 3 other TARGET_ELF_PAGE* macros
based off of that.  Rely on target_mmap to handle guest vs host page
size mismatch.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Helge Deller 1f356e8c01 linux-user: Adjust initial brk when interpreter is close to executable
While we attempt to load a ET_DYN executable far away from
TASK_UNMAPPED_BASE, we are not completely in control of the
address space layout.  If the interpreter lands close to
the executable, leaving insufficient heap space, move brk.

Tested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
[rth: Re-order after ELF_ET_DYN_BASE patch so that we do not
 "temporarily break" tsan, and also to minimize the changes required.
 Remove image_info.reserve_brk as unused.]
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Richard Henderson 1ea06ded0d linux-user: Use elf_et_dyn_base for ET_DYN with interpreter
Follow the lead of the linux kernel in fs/binfmt_elf.c,
in which an ET_DYN executable which uses an interpreter
(usually a PIE executable) is loaded away from where the
interpreter itself will be loaded.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Richard Henderson ad25051bae linux-user: Use MAP_FIXED_NOREPLACE for initial image mmap
Use this as extra protection for the guest mapping over
any qemu host mappings.

Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08 13:27:17 -07:00
Akihiko Odaki 2aea137a42 linux-user: Do not align brk with host page size
do_brk() minimizes calls into target_mmap() by aligning the address
with host page size, which is potentially larger than the target page
size. However, the current implementation of this optimization has two
bugs:

- The start of brk is rounded up with the host page size while brk
  advertises an address aligned with the target page size as the
  beginning of brk. This makes the beginning of brk unmapped.
- Content clearing after mapping is flawed. The size to clear is
  specified as HOST_PAGE_ALIGN(brk_page) - brk_page, but brk_page is
  aligned with the host page size so it is always zero.

This optimization actually has no practical benefit. It makes difference
when brk() is called multiple times with values in a range of the host
page size. However, sophisticated memory allocators try to avoid to
make such frequent brk() calls. For example, glibc 2.37 calls brk() to
shrink the heap only when there is a room more than 128 KiB. It is
rare to have a page size larger than 128 KiB if it happens.

Let's remove the optimization to fix the bugs and make the code simpler.

Fixes: 86f04735ac ("linux-user: Fix brk() to release pages")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1616
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230802071754.14876-7-akihiko.odaki@daynix.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-06 16:46:03 -07:00
Nathan Egge 4333f0924c linux-user/elfload: Set V in ELF_HWCAP for RISC-V
Set V bit for hwcap if misa is set.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1793
Signed-off-by: Nathan Egge <negge@xiph.org>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Tested-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-Id: <20230803131424.40744-1-negge@xiph.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-06 10:10:11 -07:00
Michael Tokarev 4ea3fa99be Revert "linux-user: Fix qemu-arm to run static armhf binaries"
This reverts commit 518f32221a.

It is causing similar segfaults at least on aarch64, ppc64el
and s390x. Let's revert this one for now and analyze what's
going on later.

Reopens: https://bugs.debian.org/1040981
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2023-07-22 19:54:22 +03:00
Peter Maydell 67d1f0a390 linux-user: brk() syscall fixes and armhf static binary fix
Commit 86f04735ac ("linux-user: Fix brk() to release pages") introduced
 the possibility for userspace applications to reduce memory footprint by
 calling brk() with a lower address and as such free up memory, the same
 way as the Linux kernel allows on physical machines.
 
 This change introduced some failures for applications with errors like
 - accesing bytes above the brk heap address on the same page,
 - freeing memory below the initial brk address,
 and introduced a behaviour which isn't done by the kernel (e.g. zeroing
 memory above brk).
 
 This patch series fixes those issues and has been tested with existing
 programs (e.g. upx).
 
 Additionally one patch fixes running static armhf executables (e.g. fstype)
 which was broken since qemu-8.0.
 
 Changes in v2:
 - dropped patch to revert d28b3c90cf ("linux-user: Make sure initial brk(0)
   is page-aligned")
 - rephrased some commit messages
 - fixed Cc email addresses, added new ones
 - added R-b tags
 
 Helge
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Merge tag 'linux-user-brk-fixes-pull-request' of https://github.com/hdeller/qemu-hppa into staging

linux-user: brk() syscall fixes and armhf static binary fix

Commit 86f04735ac ("linux-user: Fix brk() to release pages") introduced
the possibility for userspace applications to reduce memory footprint by
calling brk() with a lower address and as such free up memory, the same
way as the Linux kernel allows on physical machines.

This change introduced some failures for applications with errors like
- accesing bytes above the brk heap address on the same page,
- freeing memory below the initial brk address,
and introduced a behaviour which isn't done by the kernel (e.g. zeroing
memory above brk).

This patch series fixes those issues and has been tested with existing
programs (e.g. upx).

Additionally one patch fixes running static armhf executables (e.g. fstype)
which was broken since qemu-8.0.

Changes in v2:
- dropped patch to revert d28b3c90cf ("linux-user: Make sure initial brk(0)
  is page-aligned")
- rephrased some commit messages
- fixed Cc email addresses, added new ones
- added R-b tags

Helge

# -----BEGIN PGP SIGNATURE-----
#
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# XwkUAQCKb/lkI3IYxiqO48rVyHtLPtkXd+WttFpeZ076p73LTgD+IEpHZL4WV1Rw
# 4+eqW9vswjZwp1xm9bItLdnP2hkyUgI=
# =K3Va
# -----END PGP SIGNATURE-----
# gpg: Signature made Wed 19 Jul 2023 16:52:19 BST
# gpg:                using EDDSA key BCE9123E1AD29F07C049BBDEF712B510A23A0F5F
# gpg: Good signature from "Helge Deller <deller@gmx.de>" [unknown]
# gpg:                 aka "Helge Deller <deller@kernel.org>" [unknown]
# 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: 4544 8228 2CD9 10DB EF3D  25F8 3E5F 3D04 A7A2 4603
#      Subkey fingerprint: BCE9 123E 1AD2 9F07 C049  BBDE F712 B510 A23A 0F5F

* tag 'linux-user-brk-fixes-pull-request' of https://github.com/hdeller/qemu-hppa:
  linux-user: Fix qemu-arm to run static armhf binaries
  linux-user: Fix strace output for old_mmap
  linux-user: Fix signed math overflow in brk() syscall
  linux-user: Prohibit brk() to to shrink below initial heap address
  linux-user: Fix qemu brk() to not zero bytes on current page

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-07-20 09:53:52 +01:00
Helge Deller 518f32221a linux-user: Fix qemu-arm to run static armhf binaries
qemu-user crashes immediately when running static binaries on the armhf
architecture. The problem is the memory layout where the executable is
loaded before the interpreter library, in which case the reserved brk
region clashes with the interpreter code and is released before qemu
tries to start the program.

At load time qemu calculates a brk value for interpreter and executable
each.  The fix is to choose the higher one of both.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Andreas Schwab <schwab@suse.de>
Cc: qemu-stable@nongnu.org
Reported-by:  Venkata.Pyla@toshiba-tsip.com
Closes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1040981
2023-07-18 20:42:05 +02:00
Ilya Leoshkevich 7f114a5807 linux-user/elfload: Fix /proc/cpuinfo features: on s390x
elf_hwcap_str() takes a bit number, but compares it for equality with
the HWCAP_S390_* masks. This causes /proc/cpuinfo to display incorrect
hwcaps.

Fix by introducing the HWCAP_S390_NR_* constants and using them in
elf_hwcap_str() instead of the HWCAP_S390_*. While at it, add the
missing nnpa, pcimio and sie hwcaps from the latest kernel.

Output before:

	features	: esan3 zarch stfle msa

Output after:

	features	: esan3 zarch stfle msa ldisp eimm etf3eh highgprs vx vxe

Fixes: e19807bee3 ("linux-user/elfload: Introduce elf_hwcap_str() on s390x")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230627151356.273259-1-iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-07-18 09:36:27 +02:00
Philippe Mathieu-Daudé d713cf4d6c linux-user/arm: Do not allocate a commpage at all for M-profile CPUs
Since commit fbd3c4cff6 ("linux-user/arm: Mark the commpage
executable") executing bare-metal (linked with rdimon.specs)
cortex-M code fails as:

  $ qemu-arm -cpu cortex-m3 ~/hello.exe.m3
  qemu-arm: ../../accel/tcg/user-exec.c:492: page_set_flags: Assertion `last <= GUEST_ADDR_MAX' failed.
  Aborted (core dumped)

Commit 4f5c67f8df ("linux-user/arm: Take more care allocating
commpage") already took care of not allocating a commpage for
M-profile CPUs, however it had to be reverted as commit 6cda41daa2.

Re-introduce the M-profile fix from commit 4f5c67f8df.

Fixes: fbd3c4cff6 ("linux-user/arm: Mark the commpage executable")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1755
Reported-by: Christophe Lyon <christophe.lyon@linaro.org>
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230711153408.68389-1-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15 08:02:33 +01:00
Ilya Leoshkevich 78a1e153f9 linux-user: elfload: Add more initial s390x PSW bits
Make the PSW look more similar to the real s390x userspace PSW.
Except for being there, the newly added bits should not affect the
userspace code execution.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230704081506.276055-2-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-07-10 15:34:23 +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
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
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
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
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
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 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 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
Max Filippov d2796be69d linux-user: add support for xtensa FDPIC
Define xtensa-specific info_is_fdpic and fill in FDPIC-specific
registers in the xtensa version of init_thread.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Message-Id: <20230205061230.544451-1-jcmvbkbc@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10 20:42:00 +01:00
Ilya Leoshkevich 7c10cb38cc accel/tcg: Add debuginfo support
Add libdw-based functions for loading and querying debuginfo. Load
debuginfo from the system and the linux-user loaders.

This is useful for the upcoming perf support, which can then put
human-readable guest symbols instead of raw guest PCs into perfmap and
jitdump files.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230112152013.125680-3-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-01-16 10:14:12 -10:00
Jiaxun Yang fbf47c18aa linux-user: Set ELF_BASE_PLATFORM for MIPS
Match most appropriate base platform string based on insn_flags.
Logic is aligned with aligned with set_isa() from
arch/mips/kernel/cpu-probe.c in Linux kernel.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220803103009.95972-3-jiaxun.yang@flygoat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27 13:19:05 +02:00
Jiaxun Yang fcdc0ab4b4 linux-user: Introduce stubs for ELF AT_BASE_PLATFORM
AT_BASE_PLATFORM is a elf auxiliary vector pointing to a string
to pass some architecture information.
See getauxval(3) man-page.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220803103009.95972-2-jiaxun.yang@flygoat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27 13:19:05 +02:00
Helge Deller f43882052f linux-user/hppa: Drop stack guard page on hppa target
The stack-overflow check when building the "grep" debian package fails
on the debian hppa target. Reason is, that the guard page at the top
of the stack (which is added by qemu) prevents the fault handler in the
grep program to properly detect the stack overflow.

The Linux kernel on a physical machine doesn't install a guard page
either, so drop it and as such fix the build of "grep".

Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220924114501.21767-5-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27 09:33:56 +02:00
Richard Henderson 872f3d046f linux-user: Honor PT_GNU_STACK
Map the stack executable if required by default or on demand.

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-06 08:04:25 +01:00
Richard Henderson d461b73ec0 linux-user/x86_64: Allocate vsyscall page as a commpage
We're about to start validating PAGE_EXEC, which means that we've
got to mark the vsyscall page executable.  We had been special
casing this entirely within translate.

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-06 08:04:25 +01:00
Richard Henderson eee816c0b9 linux-user/hppa: Allocate page zero as a commpage
We're about to start validating PAGE_EXEC, which means that we've
got to mark page zero executable.  We had been special casing this
entirely within translate.

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-06 07:32:35 +01:00
Richard Henderson fbd3c4cff6 linux-user/arm: Mark the commpage executable
We're about to start validating PAGE_EXEC, which means
that we've got to mark the commpage executable.  We had
been placing the commpage outside of reserved_va, which
was incorrect and lead to an abort.

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-06 07:32:35 +01:00
Richard Henderson f9982ceaf2 linux-user/aarch64: Add SME related hwcap entries
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-46-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-07-11 13:43:52 +01:00
Song Gao 3418fe25fa linux-user: Add LoongArch elf support
Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220624031049.1716097-4-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-07-04 11:08:57 +05:30
Richard Henderson 9263ba8473 linux-user/x86_64: Fix ELF_PLATFORM
We had been using the i686 platform string for x86_64.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1041
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220603213801.64738-1-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-06-21 20:15:39 +02:00
Joel Stanley 96c343cc77 linux-user: Add PowerPC ISA 3.1 and MMA to hwcap
These are new hwcap bits added for power10.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220524140537.27451-9-lucas.araujo@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2022-05-26 17:11:33 -03:00
Philippe Mathieu-Daudé 2f6f4290e0 linux-user/elfload: Remove pointless non-const CPUArchState cast
fill_thread_info() takes a pointer to const.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220509205728.51912-2-philippe.mathieu.daude@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-05-23 22:47:19 +02:00
Richard Henderson 60f1c8017a linux-user: Clean up arg_start/arg_end confusion
We had two sets of variables: arg_start/arg_end, and
arg_strings/env_strings.  In linuxload.c, we set the
first pair to the bounds of the argv strings, but in
elfload.c, we set the first pair to the bounds of the
argv pointers and the second pair to the bounds of
the argv strings.

Remove arg_start/arg_end, replacing them with the standard
argc/argv/envc/envp values.  Retain arg_strings/env_strings
with the meaning we were using in elfload.c.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/714
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220427025129.160184-1-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-05-23 08:15:19 +02:00
Richard Henderson dd4c6ee227 linux-user/nios2: Only initialize SP and PC in target_cpu_copy_regs
Drop the set of estatus in init_thread; it was clearly intended
to be setting the value of CR_STATUS for the application, but we
never actually performed that copy.  However, the proper value is
set in nios2_cpu_reset so we don't need to do anything here.

We only initialize SP and EA in init_thread, there's no value in
copying other uninitialized data into ENV.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-21-richard.henderson@linaro.org>
2022-04-26 08:16:41 -07:00
Richard Henderson 17a406eec5 target/nios2: Split PC out of env->regs[]
It is cleaner to have a separate name for this variable.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-17-richard.henderson@linaro.org>
2022-04-26 08:16:41 -07:00
Marc-André Lureau 8e3b0cbb72 Replace qemu_real_host_page variables with inlined functions
Replace the global variables with inlined helper functions. getpagesize() is very
likely annotated with a "const" function attribute (at least with glibc), and thus
optimization should apply even better.

This avoids the need for a constructor initialization too.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220323155743.1585078-12-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-04-06 10:50:38 +02:00
Marc-André Lureau ee3eb3a7ce Replace TARGET_WORDS_BIGENDIAN
Convert the TARGET_WORDS_BIGENDIAN macro, similarly to what was done
with HOST_BIG_ENDIAN. The new TARGET_BIG_ENDIAN macro is either 0 or 1,
and thus should always be defined to prevent misuse.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Suggested-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220323155743.1585078-8-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-04-06 10:50:37 +02:00