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2023-07-15linux-user: Rename mmap_reserve to mmap_reserve_or_unmapRichard Henderson
If !reserved_va, munmap instead and assert success. Update all callers. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-22-richard.henderson@linaro.org>
2023-07-15linux-user: Rewrite mmap_reserveRichard Henderson
Use 'last' variables instead of 'end' variables; be careful about avoiding overflow. Assert that the mmap succeeded. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-21-richard.henderson@linaro.org>
2023-07-15linux-user: Use 'last' instead of 'end' in target_mmapRichard Henderson
Complete the transition within the mmap functions to a formulation that does not overflow at the end of the address space. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230707204054.8792-20-richard.henderson@linaro.org>
2023-07-15linux-user: Use page_find_range_empty for mmap_find_vma_reservedRichard Henderson
Use the interval tree to find empty space, rather than probing each page in turn. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-19-richard.henderson@linaro.org>
2023-07-15linux-user: Rewrite mmap_fragRichard Henderson
Use 'last' variables instead of 'end' variables. Always zero MAP_ANONYMOUS fragments, which we previously failed to do if they were not writable; early exit in case we allocate a new page from the kernel, known zeros. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-16-richard.henderson@linaro.org>
2023-07-15linux-user: Rewrite target_mprotectRichard Henderson
Use 'last' variables instead of 'end' variables. When host page size > guest page size, detect when adjacent host pages have the same protection and merge that expanded host range into fewer syscalls. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-15-richard.henderson@linaro.org>
2023-07-15linux-user: Widen target_mmap offset argument to off_tRichard Henderson
We build with _FILE_OFFSET_BITS=64, so off_t = off64_t = uint64_t. With an extra cast, this fixes emulation of mmap2, which could overflow the computation of the full value of offset. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-14-richard.henderson@linaro.org>
2023-07-15linux-user: Split out target_to_host_protRichard Henderson
Split out from validate_prot_to_pageflags, as there is not one single host_prot for the entire range. We need to adjust prot for every host page that overlaps multiple guest pages. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-13-richard.henderson@linaro.org>
2023-07-15linux-user: Implement MAP_FIXED_NOREPLACERichard Henderson
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-12-richard.henderson@linaro.org>
2023-07-15linux-user: Populate more bits in mmap_flags_tblRichard Henderson
Fix translation of TARGET_MAP_SHARED and TARGET_MAP_PRIVATE, which are types not single bits. Add TARGET_MAP_SHARED_VALIDATE, TARGET_MAP_SYNC, TARGET_MAP_NONBLOCK, TARGET_MAP_POPULATE, TARGET_MAP_FIXED_NOREPLACE, and TARGET_MAP_UNINITIALIZED. Update strace to match. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-9-richard.henderson@linaro.org>
2023-07-15linux-user: Split TARGET_PROT_* out of syscall_defs.hRichard Henderson
Move the values into the per-target target_mman.h headers Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-8-richard.henderson@linaro.org>
2023-07-15linux-user: Split TARGET_MAP_* out of syscall_defs.hRichard Henderson
Move the values into the per-target target_mman.h headers Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-7-richard.henderson@linaro.org>
2023-07-15linux-user/strace: Expand struct flags to hold a maskRichard Henderson
A zero bit value does not make sense -- it must relate to some field in some way. Define FLAG_BASIC with a build-time sanity check. Adjust FLAG_GENERIC and FLAG_TARGET to use it. Add FLAG_GENERIC_MASK and FLAG_TARGET_MASK. Fix up the existing flag definitions for build errors. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-6-richard.henderson@linaro.org>
2023-07-15linux-user: Fix formatting of mmap.cRichard Henderson
Fix all checkpatch.pl errors within mmap.c. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230707204054.8792-5-richard.henderson@linaro.org>
2023-07-15linux-user: Make sure initial brk(0) is page-alignedAndreas Schwab
Fixes: 86f04735ac ("linux-user: Fix brk() to release pages") Signed-off-by: Andreas Schwab <schwab@suse.de> Message-Id: <mvmpm55qnno.fsf@suse.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Fix do_shmat type errorsRichard Henderson
The guest address, raddr, should be unsigned, aka abi_ulong. The host addresses should be cast via *intptr_t not long. Drop the inline and fix two other whitespace issues. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Anton Johansson <anjo@rev.ng> Message-Id: <20230626140250.69572-1-richard.henderson@linaro.org>
2023-07-15linux-user/syscall: Implement execve without execveatPierrick Bouvier
Support for execveat syscall was implemented in 55bbe4 and is available since QEMU 8.0.0. It relies on host execveat, which is widely available on most of Linux kernels today. However, this change breaks qemu-user self emulation, if "host" qemu version is less than 8.0.0. Indeed, it does not implement yet execveat. This strange use case happens with most of distribution today having binfmt support. With a concrete failing example: $ qemu-x86_64-7.2 qemu-x86_64-8.0 /bin/bash -c /bin/ls /bin/bash: line 1: /bin/ls: Function not implemented -> not implemented means execve returned ENOSYS qemu-user-static 7.2 and 8.0 can be conveniently grabbed from debian packages qemu-user-static* [1]. One usage of this is running wine-arm64 from linux-x64 (details [2]). This is by updating qemu embedded in docker image that we ran into this issue. The solution to update host qemu is not always possible. Either it's complicated or ask you to recompile it, or simply is not accessible (GitLab CI, GitHub Actions). Thus, it could be worth to implement execve without relying on execveat, which is the goal of this patch. This patch was tested with example presented in this commit message. [1] http://ftp.us.debian.org/debian/pool/main/q/qemu/ [1] https://www.linaro.org/blog/emulate-windows-on-arm/ Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru> Message-Id: <20230705121023.973284-1-pierrick.bouvier@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_uint not unsigned in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_short not short in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_ushort not unsigned short in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_int not int in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_llong not long long in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_ullong not unsigned long long in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_uint not unsigned int in syscall_defs.hRichard Henderson
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_llong not int64_t in syscall_defs.hRichard Henderson
Be careful not to change linux_dirent64, which is a host structure. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_ullong not uint64_t in syscall_defs.hRichard Henderson
Be careful not to change linux_dirent64, which is a host structure. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_int not int32_t in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Use abi_uint not uint32_t in syscall_defs.hRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Remove #if 0 block in syscall_defs.hRichard Henderson
These definitions are in sparc/signal.c. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-15linux-user: Reformat syscall_defs.hRichard Henderson
Untabify and re-indent. We had a mix of 2, 3, 4, and 8 space indentation. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-10Merge tag 'pull-riscv-to-apply-20230710-1' of ↵Richard Henderson
https://github.com/alistair23/qemu into staging Third RISC-V PR for 8.1 * Use xl instead of mxl for disassemble * Factor out extension tests to cpu_cfg.h * disas/riscv: Add vendor extension support * disas/riscv: Add support for XVentanaCondOps * disas/riscv: Add support for XThead* instructions * Fix mstatus related problems * Fix veyron-v1 CPU properties * Fix the xlen for data address when MPRV=1 * opensbi: Upgrade from v1.2 to v1.3 * Enable 32-bit Spike OpenSBI boot testing * Support the watchdog timer of HiFive 1 rev b * Only build qemu-system-riscv$$ on rv$$ host * Add RVV registers to log * Restrict ACLINT to TCG * Add syscall riscv_hwprobe * Add support for BF16 extensions * KVM_RISCV_SET_TIMER macro is not configured correctly * Generate devicetree only after machine initialization is complete * virt: Convert fdt_load_addr to uint64_t * KVM: fixes and enhancements * Add support for the Zfa extension # -----BEGIN PGP SIGNATURE----- # # iQIzBAABCAAdFiEEaukCtqfKh31tZZKWr3yVEwxTgBMFAmSr+ekACgkQr3yVEwxT # gBMMGg//ZCcyH3KXB49c2KUIFO6FKYUxN9uC3giZCtuGyEH8T2yDgZVVXnxwU+Ij # +3Ej6T/ZdWMpePC9qf+xKzHWZk7Qc8Tcg+JgQbga573894yZInRwYl8HsSlEKA+Z # vlqSBPxTlp9rlDwGP/LjGljyIFqL4konk9zi3FL4ZXTF1iHUGrh/953Y3wIreEfl # KX5UznnWcgy2BqQT1vihMbM8qCVK6iryH+QZ6LiAsPMSX1rIzk8ectQryILzoIYh # bMiwCLVMyr4ZrUXjmGTF+7/WcOWwhhyfpdstf2iotKALelZtVHit0wHcty2GYQde # nvN83jJWu04DGXkPBUsqCUQXczGo1QHjJUH3RIRJzfOby/lGt4pSzHAfKA+iNUht # ikM3SdBsXMO+ogjTtTcCMb7/m2vsMoQP60VRts9Mh3YVD0cgr7RqpqRoEMugVYnr # ca8Vijf71mB+y+pq477eV1Q8BoKpr8xa1OlFkNKPC17uMD7HoDMI44QgFOgtYp10 # TMsqqyB75q6PZhSEwm63xbmH0Zpo8kSqT/E3MTtGTyPeuL8TNNNSkCmFaGYmRrbI # XEp7vG2RaDJOvDomS3nUhA5ruc8SaXd0q25q2gLYQfCsehfFqZAwuNB5xf1zS0M0 # ov1/gwaqU93t6nLbo2cCbb0plkIFKwwJ9KKjD06wJ4KPe0TGFzk= # =3XFD # -----END PGP SIGNATURE----- # gpg: Signature made Mon 10 Jul 2023 01:30:33 PM BST # gpg: using RSA key 6AE902B6A7CA877D6D659296AF7C95130C538013 # gpg: Good signature from "Alistair Francis <alistair@alistair23.me>" [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: 6AE9 02B6 A7CA 877D 6D65 9296 AF7C 9513 0C53 8013 * tag 'pull-riscv-to-apply-20230710-1' of https://github.com/alistair23/qemu: (54 commits) riscv: Add support for the Zfa extension target/riscv/kvm.c: read/write (cbom|cboz)_blocksize in KVM target/riscv/kvm.c: add kvmconfig_get_cfg_addr() helper target/riscv: update multi-letter extension KVM properties target/riscv/cpu.c: create KVM mock properties target/riscv/cpu.c: remove priv_ver check from riscv_isa_string_ext() target/riscv/cpu.c: add satp_mode properties earlier target/riscv/kvm.c: add multi-letter extension KVM properties target/riscv/kvm.c: update KVM MISA bits target/riscv: add KVM specific MISA properties target/riscv/cpu: add misa_ext_info_arr[] target/riscv/kvm.c: init 'misa_ext_mask' with scratch CPU target/riscv: handle mvendorid/marchid/mimpid for KVM CPUs target/riscv: read marchid/mimpid in kvm_riscv_init_machine_ids() target/riscv: use KVM scratch CPUs to init KVM properties target/riscv/cpu.c: restrict 'marchid' value target/riscv/cpu.c: restrict 'mimpid' value target/riscv/cpu.c: restrict 'mvendorid' value hw/riscv/virt.c: skip 'mmu-type' FDT if satp mode not set target/riscv: skip features setup for KVM CPUs ... Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-10linux-user: elfload: Add more initial s390x PSW bitsIlya Leoshkevich
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>
2023-07-10linux-user/riscv: Add syscall riscv_hwprobeRobbin Ehn
This patch adds the new syscall for the "RISC-V Hardware Probing Interface" (https://docs.kernel.org/riscv/hwprobe.html). Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Robbin Ehn <rehn@rivosinc.com> Message-Id: <06a4543df2aa6101ca9a48f21a3198064b4f1f87.camel@rivosinc.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2023-07-08linux-user: Improve strace output of pread64() and pwrite64()Helge Deller
Make the strace look nicer for those two syscalls. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-08linux-user: Fix accept4(SOCK_NONBLOCK) syscallHelge Deller
The Linux accept4() syscall allows two flags only: SOCK_NONBLOCK and SOCK_CLOEXEC, and returns -EINVAL if any other bits have been set. Change the qemu implementation accordingly, which means we can not use the fcntl_flags_tbl[] translation table which allows too many other values. Beside the correction in behaviour, this actually fixes the accept4() emulation for hppa, mips and alpha targets for which SOCK_NONBLOCK is different than TARGET_SOCK_NONBLOCK (aka O_NONBLOCK). The fix can be verified with the testcase of the debian lwt package, which hangs forever in a read() syscall without this patch. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-08linux-user: Fix fcntl() and fcntl64() to return O_LARGEFILE for 32-bit targetsHelge Deller
When running a 32-bit guest on a 64-bit host, fcntl[64](F_GETFL) should return with the TARGET_O_LARGEFILE flag set, because all 64-bit hosts support large files unconditionally. But on 64-bit hosts, O_LARGEFILE has the value 0, so the flag translation can't be done with the fcntl_flags_tbl[]. Instead add the TARGET_O_LARGEFILE flag afterwards. Note that for 64-bit guests the compiler will optimize away this code, since TARGET_O_LARGEFILE is zero. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2023-07-03linux-user: Emulate /proc/self/smapsIlya Leoshkevich
/proc/self/smaps is an extension of /proc/self/maps: it provides the same lines, plus additional information about each range. GDB uses /proc/self/smaps when available, which means that generate-core-file tries it first before falling back to /proc/self/maps. This, in turn, causes it to dump the host mappings, since /proc/self/smaps is not emulated and is just passed through. Fix by emulating /proc/self/smaps. Provide true values only for Size, KernelPageSize, MMUPageSize and VmFlags. Leave all other values at 0, which is a valid conservative estimate. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230621203627.1808446-4-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230630180423.558337-34-alex.bennee@linaro.org>
2023-07-03linux-user: Add "safe" parameter to do_guest_openat()Ilya Leoshkevich
gdbstub cannot meaningfully handle QEMU_ERESTARTSYS, and it doesn't need to. Add a parameter to do_guest_openat() that makes it use openat() instead of safe_openat(), so that it becomes usable from gdbstub. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230621203627.1808446-3-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230630180423.558337-33-alex.bennee@linaro.org>
2023-07-03linux-user: Expose do_guest_openat() and do_guest_readlink()Ilya Leoshkevich
These functions will be required by the GDB stub in order to provide the guest view of /proc to GDB. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230621203627.1808446-2-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230630180423.558337-32-alex.bennee@linaro.org>
2023-07-01linux-user: Avoid mmap of the last byte of the reserved_vaRichard Henderson
There is an overflow problem in mmap_find_vma_reserved: when reserved_va == UINT32_MAX, end may overflow to 0. Rather than a larger rewrite at this time, simply avoid the final byte of the VA, which avoids searching the final page, which avoids the overflow. Cc: qemu-stable@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1741 Fixes: 95059f9c ("include/exec: Change reserved_va semantics to last byte") Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: Michael Tokarev <mjt@tls.msk.ru> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru> Message-Id: <20230629080835.71371-1-richard.henderson@linaro.org>
2023-06-29target/i386: emulate 64-bit ring 0 for linux-user if LM feature is setPaolo Bonzini
32-bit binaries can run on a long mode processor even if the kernel is 64-bit, of course, and this can have slightly different behavior; for example, SYSCALL is allowed on Intel processors. Allow reporting LM to programs running under user mode emulation, so that "-cpu" can be used with named CPU models even for qemu-i386 and even without disabling LM by hand. Fortunately, most of the runtime code in QEMU has to depend on HF_LMA_MASK or on HF_CS64_MASK (which is anyway false for qemu-i386's 32-bit code segment) rather than TARGET_X86_64, therefore all that is needed is an update of linux-user's ring 0 setup. Fixes: https://gitlab.com/qemu-project/qemu/-/issues/1534 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: implement SYSCALL/SYSRET in 32-bit emulatorsPaolo Bonzini
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>
2023-06-13linux-user, bsd-user: Preserve incoming order of environment variables in ↵Andreas Schwab
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>
2023-06-10linux-user: elfload: Specify -R is an option for qemu-user binariesAndrew Jeffery
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>
2023-06-10linux-user: elfload: s/min_mmap_addr/mmap_min_addr/Andrew Jeffery
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>
2023-06-10linux-user: Return EINVAL for getgroups() with negative gidsetsizePeter Maydell
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>
2023-06-09linux-user: add comments for TARGET_NR_[gs]etgroups{,32}Michael Tokarev
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>
2023-06-05linux-user: Emulate /proc/cpuinfo on s390xIlya Leoshkevich
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>
2023-06-05linux-user/elfload: Introduce elf_hwcap_str() on s390xIlya Leoshkevich
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>
2023-06-05linux-user/elfload: Expose get_elf_hwcap() on s390xIlya Leoshkevich
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>
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-02 00:52:12 +0000