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2022-12-14Drop more useless casts from void * to pointerMarkus Armbruster1-1/+1
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20221123133811.1398562-1-armbru@redhat.com>
2022-11-02linux-user: always translate cmsg when recvmsgIcenowy Zheng1-1/+2
It's possible that a message contains both normal payload and ancillary data in the same message, and even if no ancillary data is available this information should be passed to the target, otherwise the target cmsghdr will be left uninitialized and the target is going to access uninitialized memory if it expects cmsg. Always call the function that translate cmsg when recvmsg, because that function should be empty-cmsg-safe (it creates an empty cmsg in the target). Signed-off-by: Icenowy Zheng <uwu@icenowy.me> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20221028081220.1604244-1-uwu@icenowy.me> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-11-02linux-user: Add strace output for timer_settime64() syscallHelge Deller1-1/+4
Add missing timer_settime64() strace output and specify format for timer_settime(). Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <Y1b5eIXFoMRDcDL9@p100> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-11-02linux-user: Add close_range() syscallHelge Deller2-0/+22
Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <Y1dLJoEDhJ2AAYDn@p100> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-11-02linux-user/hppa: Detect glibc ABORT_INSTRUCTION and EXCP_BREAK handlerHelge Deller1-5/+14
The glibc on the hppa platform uses the "iitlbp %r0,(%sr0, %r0)" assembler instruction as ABORT_INSTRUCTION. If this (in userspace context) illegal assembler statement is found, dump the registers and report the failure to userspace the same way as the Linux kernel on physical hardware. For other illegal instructions report TARGET_ILL_ILLOPC instead of TARGET_ILL_ILLOPN as si_code. Additionally add the missing EXCP_BREAK exception handler which occurs when the "break x,y" assembler instruction is executed and report EXCP_ASSIST traps. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <Y1osHVsylkuZNUnY@p100> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-26Merge tag 'pull-tcg-20221026' of https://gitlab.com/rth7680/qemu into stagingStefan Hajnoczi1-4/+0
Revert incorrect cflags initialization. Add direct jumps for tcg/loongarch64. Speed up breakpoint check. Improve assertions for atomic.h. Move restore_state_to_opc to TCGCPUOps. Cleanups to TranslationBlock maintenance. # -----BEGIN PGP SIGNATURE----- # # iQFRBAABCgA7FiEEekgeeIaLTbaoWgXAZN846K9+IV8FAmNYlo4dHHJpY2hhcmQu # aGVuZGVyc29uQGxpbmFyby5vcmcACgkQZN846K9+IV9y2wf9EKsCA6VtYI2Qtftf # q/ujYFmUf8AKTb9eVcA0XX71CT1dEnFR7GQyT8B8X13x0pSbOX7tbEWHPreegTFV # tESiejvymi6Q9devAB58GVwNoU/zPIQQGhCPxkVUKDmRztJz22MbGUzd7UKPPgU8 # 2nVMkIpLTMBsKeFLxE/D3ZntmdKsgyI/1Dtkl9TxvlDGsCbMjbNcr8lM+TLaG2oX # GZhFyJHKEVy0cobukvhhb/9rU7AWdG/BnFmZM16JxvHV/YCwJBx3Udhcy9xPePUU # yIjkGsUAq4aB6H9RFuTWh7GmaY5u6gMbTTi2J7hDos0mzauYJtpgEB/H42LpycGE # sOhkLQ== # =DUb8 # -----END PGP SIGNATURE----- # gpg: Signature made Tue 25 Oct 2022 22:08:14 EDT # gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F # gpg: issuer "richard.henderson@linaro.org" # gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full] # Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F * tag 'pull-tcg-20221026' of https://gitlab.com/rth7680/qemu: (47 commits) accel/tcg: Remove restore_state_to_opc function target/xtensa: Convert to tcg_ops restore_state_to_opc target/tricore: Convert to tcg_ops restore_state_to_opc target/sparc: Convert to tcg_ops restore_state_to_opc target/sh4: Convert to tcg_ops restore_state_to_opc target/s390x: Convert to tcg_ops restore_state_to_opc target/rx: Convert to tcg_ops restore_state_to_opc target/riscv: Convert to tcg_ops restore_state_to_opc target/ppc: Convert to tcg_ops restore_state_to_opc target/openrisc: Convert to tcg_ops restore_state_to_opc target/nios2: Convert to tcg_ops restore_state_to_opc target/mips: Convert to tcg_ops restore_state_to_opc target/microblaze: Convert to tcg_ops restore_state_to_opc target/m68k: Convert to tcg_ops restore_state_to_opc target/loongarch: Convert to tcg_ops restore_state_to_opc target/i386: Convert to tcg_ops restore_state_to_opc target/hppa: Convert to tcg_ops restore_state_to_opc target/hexagon: Convert to tcg_ops restore_state_to_opc target/cris: Convert to tcg_ops restore_state_to_opc target/avr: Convert to tcg_ops restore_state_to_opc ... Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2022-10-26accel/tcg: Call tb_invalidate_phys_page for PAGE_RESETRichard Henderson1-4/+0
When PAGE_RESET is set, we are replacing pages with new content, which means that we need to invalidate existing cached data, such as TranslationBlocks. Perform the reset invalidate while we're doing other invalidates, which allows us to remove the separate invalidates from the user-only mmap/munmap/mprotect routines. In addition, restrict invalidation to PAGE_EXEC pages. Since cdf713085131, we have validated PAGE_EXEC is present before translation, which means we can assume that if the bit is not present, there are no translations to invalidate. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-10-25linux-user: Add guest memory layout to exception dumpHelge Deller3-16/+33
When the emulation stops with a hard exception it's very useful for debugging purposes to dump the current guest memory layout (for an example see /proc/self/maps) beside the CPU registers. The open_self_maps() function provides such a memory dump, but since it's located in the syscall.c file, various changes (add #includes, make this function externally visible, ...) are needed to be able to call it from the existing EXCP_DUMP() macro. This patch takes another approach by re-defining EXCP_DUMP() to call target_exception_dump(), which is in syscall.c, consolidates the log print functions and allows to add the call to dump the memory layout. Beside a reduced code footprint, this approach keeps the changes across the various callers minimal, and keeps EXCP_DUMP() highlighted as important macro/function. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <Y1bzAWbw07WBKPxw@p100> [lv: remove pc declaration and setting] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-21linux-user: Implement faccessat2WANG Xuerui3-1/+13
User space has been preferring this syscall for a while, due to its closer match with C semantics, and newer platforms such as LoongArch apparently have libc implementations that don't fallback to faccessat so normal access checks are failing without the emulation in place. Tested by successfully emerging several packages within a Gentoo loong stage3 chroot, emulated on amd64 with help of static qemu-loongarch64. Reported-by: Andreas K. Hüttel <dilfridge@gentoo.org> Signed-off-by: WANG Xuerui <xen0n@gentoo.org> Message-Id: <20221009060813.2289077-1-xen0n@gentoo.org> [lv: removing defined(__NR_faccessat2) in syscall.c, adding defined(TARGET_NR_faccessat2) on print_faccessat()] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-21linux-user: remove conditionals for many fs.h ioctlsDaniel P. Berrangé1-24/+0
These ioctls have been defined in linux/fs.h for a long time * BLKGETSIZE64 - <2.6.12 (linux.git epoch) * BLKDISCARD - 2.6.28 (d30a2605be9d5132d95944916e8f578fcfe4f976) * BLKIOMIN - 2.6.32 (ac481c20ef8f6c6f2be75d581863f40c43874ef7) * BLKIOOPT - 2.6.32 (ac481c20ef8f6c6f2be75d581863f40c43874ef7) * BLKALIGNOFF - 2.6.32 (ac481c20ef8f6c6f2be75d581863f40c43874ef7) * BLKPBSZGET - 2.6.32 (ac481c20ef8f6c6f2be75d581863f40c43874ef7) * BLKDISCARDZEROES - 2.6.32 (98262f2762f0067375f83824d81ea929e37e6bfe) * BLKSECDISCARD - 2.6.36 (8d57a98ccd0b4489003473979da8f5a1363ba7a3) * BLKROTATIONAL - 3.2 (ef00f59c95fe6e002e7c6e3663cdea65e253f4cc) * BLKZEROOUT - 3.6 (66ba32dc167202c3cf8c86806581a9393ec7f488) * FIBMAP - <2.6.12 (linux.git epoch) * FIGETBSZ - <2.6.12 (linux.git epoch) and when building with latest glibc, we'll see compat definitions in syscall.c anyway thanks to the previous patch. Thus we can assume they always exist and remove the conditional checks. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20221004093206.652431-3-berrange@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-21linux-user: add more compat ioctl definitionsDaniel P. Berrangé1-0/+25
GLibc changes prevent us from including linux/fs.h anymore, and we previously adjusted to this in commit 3cd3df2a9584e6f753bb62a0028bd67124ab5532 Author: Daniel P. Berrangé <berrange@redhat.com> Date: Tue Aug 2 12:41:34 2022 -0400 linux-user: fix compat with glibc >= 2.36 sys/mount.h That change required adding compat ioctl definitions on the QEMU side for any ioctls that we would otherwise obtain from linux/fs.h. This commit adds more that were initially missed, due to their usage being conditionalized in QEMU. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20221004093206.652431-2-berrange@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-21linux-user: don't use AT_EXECFD in do_openat()Laurent Vivier1-2/+1
AT_EXECFD gives access to the binary file even if it is not readable (only executable). Moreover it can be opened with flags and mode that are not the ones provided by do_openat() caller. And it is not available because loader_exec() has closed it. To avoid that, use only safe_openat() with the exec_path. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220927124357.688536-3-laurent@vivier.eu> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-21linux-user: handle /proc/self/exe with execve() syscallLaurent Vivier1-1/+5
If path is /proc/self/exe, use the executable path provided by exec_path. Don't use execfd as it is closed by loader_exec() and otherwise will survive to the exec() syscall and be usable child process. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220927124357.688536-2-laurent@vivier.eu> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-21linux-user: fix pidfd_send_signal()Laurent Vivier2-9/+14
According to pidfd_send_signal(2), info argument can be a NULL pointer. Fix strace to correctly manage ending comma in parameters. Fixes: cc054c6f13 ("linux-user: Add pidfd_open(), pidfd_send_signal() and pidfd_getfd() syscalls") cc: Helge Deller <deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Helge Deller <deller@gmx.de> Message-Id: <20221005163826.1455313-1-laurent@vivier.eu> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-21linux-user: Fix more MIPS n32 syscall ABI issuesWANG Xuerui1-5/+5
In commit 80f0fe3a85 ("linux-user: Fix syscall parameter handling for MIPS n32") the ABI problem regarding offset64 on MIPS n32 was fixed, but still some cases remain where the n32 is incorrectly treated as any other 32-bit ABI that passes 64-bit arguments in pairs of GPRs. Fix by excluding TARGET_ABI_MIPSN32 from various TARGET_ABI_BITS == 32 checks. Closes: https://gitlab.com/qemu-project/qemu/-/issues/1238 Signed-off-by: WANG Xuerui <xen0n@gentoo.org> Cc: Philippe Mathieu-Daudé <f4bug@amsat.org> Cc: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: Andreas K. Hüttel <dilfridge@gentoo.org> Cc: Joshua Kinard <kumba@gentoo.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Tested-by: Andreas K. Huettel <dilfridge@gentoo.org> Message-Id: <20221006085500.290341-1-xen0n@gentoo.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-17linux-user: Fix struct statfs ABI on loongarch64WANG Xuerui1-1/+2
Previously the 32-bit version was incorrectly chosen, leading to funny but incorrect output from e.g. df(1). Simply select the version corresponding to the 64-bit asm-generic definition. For reference, this program should produce the same output no matter natively compiled or not, for loongarch64 or not: ```c #include <stdio.h> #include <sys/statfs.h> int main(int argc, const char *argv[]) { struct statfs b; if (statfs(argv[0], &b)) return 1; printf("f_type = 0x%lx\n", b.f_type); printf("f_bsize = %ld\n", b.f_bsize); printf("f_blocks = %ld\n", b.f_blocks); printf("f_bfree = %ld\n", b.f_bfree); printf("f_bavail = %ld\n", b.f_bavail); return 0; } // Example output on my amd64 box, with the test binary residing on a // btrfs partition. // Native and emulated output after the fix: // // f_type = 0x9123683e // f_bsize = 4096 // f_blocks = 268435456 // f_bfree = 168406890 // f_bavail = 168355058 // Output before the fix, note the messed layout: // // f_type = 0x10009123683e // f_bsize = 723302085239504896 // f_blocks = 168355058 // f_bfree = 2250817541779750912 // f_bavail = 1099229433104 ``` Fixes: 1f63019632 ("linux-user: Add LoongArch syscall support") Signed-off-by: WANG Xuerui <xen0n@gentoo.org> Cc: Song Gao <gaosong@loongson.cn> Cc: Xiaojuan Yang <yangxiaojuan@loongson.cn> Cc: Andreas K. Hüttel <dilfridge@gentoo.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Andreas K. Huettel <dilfridge@gentoo.org> Message-Id: <20221006100710.427252-1-xen0n@gentoo.org> Signed-off-by: Song Gao <gaosong@loongson.cn>
2022-10-11linux-user: i386/signal: support XSAVE/XRSTOR for signal frame fpstatePaolo Bonzini1-19/+100
Add support for saving/restoring extended save states when signals are delivered. This allows using AVX, MPX or PKRU registers in signal handlers. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-10-11linux-user: i386/signal: support FXSAVE fpstate on 32-bit emulationPaolo Bonzini1-51/+76
Linux can use FXSAVE to save/restore XMM registers even on 32-bit systems. This requires some care in order to keep the FXSAVE area aligned to 16 bytes; for this reason, get_sigframe is changed to pass the offset into the FXSAVE area rather than the full frame size. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-10-11linux-user: i386/signal: move fpstate at the end of the 32-bit framesPaolo Bonzini1-2/+9
Recent versions of Linux moved the 32-bit fpstate towards the end of the frame, so that the variable-sized xsave data does not overwrite the (ABI-defined) extramask[] field. Follow suit in QEMU. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-10-06plugins: add [pre|post]fork helpers to linux-userAlex Bennée1-0/+2
Special care needs to be taken in ensuring locks are in a consistent state across fork events. Add helpers so the plugin system can ensure that. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Fixes: https://gitlab.com/qemu-project/qemu/-/issues/358 Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Tested-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20221004115221.2174499-1-alex.bennee@linaro.org>
2022-10-04target/sh4: Fix TB_FLAG_UNALIGNRichard Henderson1-3/+3
The value previously chosen overlaps GUSA_MASK. Rename all DELAY_SLOT_* and GUSA_* defines to emphasize that they are included in TB_FLAGs. Add aliases for the FPSCR and SR bits that are included in TB_FLAGS, so that we don't accidentally reassign those bits. Fixes: 4da06fb3062 ("target/sh4: Implement prctl_unalign_sigbus") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/856 Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-28Merge tag 'linux-user-for-7.2-pull-request' of ↵Stefan Hajnoczi39-259/+716
https://gitlab.com/laurent_vivier/qemu into staging linux-user pull request 20220928-v2 use 'max' instead of 'qemu32' / 'qemu64' add pidfd_open(), pidfd_send_signal() and pidfd_getfd() Improve madvise(MADV_DONTNEED) futex syscal rework strace improvement HP/PA fixes and improvement Misc fixes # -----BEGIN PGP SIGNATURE----- # # iQJGBAABCAAwFiEEzS913cjjpNwuT1Fz8ww4vT8vvjwFAmM0riISHGxhdXJlbnRA # dml2aWVyLmV1AAoJEPMMOL0/L748gH4P/2wesXJKPMY2zQzP3Rld4iyefoPGG/Yp # mdq59BbjO2jQMR8GBss/nl9l84cIzzkYRQIogaKsjljtZYm/OO5xRefqrzJY6apD # eidxv20dAVjuaXHAIdGhbFlxot1ctExbZs9atB4uj5DWxfYGD6e/stoBy5/pSmr4 # M5EbGHhyrRI7tRbHGtVQVvG6AT6XGE0pT9tzT5JLaApF8UPMkgJwmez16PNWvcMm # v8GEvKm/vEVS8CCpzLV4kfwVeo3f54VAOrEBDi29ph2Yo50IA21k8BvoRZaSp+Kn # G6TMnnly/DkMspAs5EOVfat+kv3TziNNdDH7EnVU1vV1yTDdZgW/1204Uy/JY0Pw # WotwAFuO9FYeHKmjY0CfnIIZZHYZpDYUOZ8M6dESD/O0EjoB8LMf5p9cbYlze4DE # csJZCsVcz19HDv6QZXi5mvvDcJ83B2IDb8/PUAzSc0n62lXL9qjYD0wdb0QsLdAT # I25qLDge1HCmQfCIKcaoHYvE0pDmvkF6ftuQUXLtIwtaV0Z/N5wDf2PEHikjOYHM # gD2izz23/2wQx6KP/9ZNnCJ5QEBkEgm5wpHncsvjzSzi1uIdNlHyzJJwGTAcc5qZ # hOeoJ7dT0D6g0BGnvOdg2W/bDx18KW65mNDxE4d+W0uzn0YmQtArk2YsnhKQNO46 # 12/0ltPFnSV/ # =DIzQ # -----END PGP SIGNATURE----- # gpg: Signature made Wed 28 Sep 2022 16:27:14 EDT # gpg: using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C # gpg: issuer "laurent@vivier.eu" # 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-7.2-pull-request' of https://gitlab.com/laurent_vivier/qemu: (37 commits) linux-user: Add parameters of getrandom() syscall for strace linux-user: Lock log around strace linux-user: Update print_futex_op linux-user: Implement PI futexes linux-user: Convert signal number for FUTEX_FD linux-user: Implement FUTEX_WAKE_BITSET linux-user: Sink call to do_safe_futex linux-user: Combine do_futex and do_futex_time64 linux-user: Set ELF_BASE_PLATFORM for MIPS linux-user: Introduce stubs for ELF AT_BASE_PLATFORM linux-user/s390x: Save/restore fpc when handling a signal linux-user: Don't assume 0 is not a valid host timer_t value linux-user: fix bug about missing signum convert of sigqueue linux-user/hppa: Fix setup_sigcontext() linux-user/hppa: Allow PROT_GROWSUP and PROT_GROWSDOWN in mprotect() linux-user/hppa: Increase guest stack size to 80MB for hppa target linux-user/hppa: Drop stack guard page on hppa target linux-user/hppa: Add signal trampoline for hppa target linux-user: Add proper strace format strings for getdents()/getdents64() linux-user: Fix TARGET_PROT_SEM for XTENSA ... Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2022-09-28linux-user: Add parameters of getrandom() syscall for straceHelge Deller1-1/+1
Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220927093538.8954-2-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Lock log around straceRichard Henderson1-19/+46
Do not allow syscall arguments to be interleaved between threads. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220829021006.67305-8-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Update print_futex_opRichard Henderson1-37/+33
Use a table for the names; print unknown values in hex, since the value contains flags. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220829021006.67305-7-richard.henderson@linaro.org> [lv: update print_futex() according to "linux-user: Show timespec on strace for futex()"] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Implement PI futexesRichard Henderson2-0/+13
Define the missing FUTEX_* constants in syscall_defs.h Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220829021006.67305-6-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Convert signal number for FUTEX_FDRichard Henderson1-0/+1
The val argument to FUTEX_FD is a signal number. Convert to match the host, as it will be converted back when the signal is delivered. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220829021006.67305-5-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Implement FUTEX_WAKE_BITSETRichard Henderson1-0/+1
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220829021006.67305-4-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Sink call to do_safe_futexRichard Henderson1-29/+31
Leave only the argument adjustments within the shift, and sink the actual syscall to the end. Sink the timespec conversion as well, as there will be more users. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220829021006.67305-3-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Combine do_futex and do_futex_time64Richard Henderson1-56/+11
Pass a boolean to select between time32 and time64. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220829021006.67305-2-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Set ELF_BASE_PLATFORM for MIPSJiaxun Yang1-0/+31
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>
2022-09-27linux-user: Introduce stubs for ELF AT_BASE_PLATFORMJiaxun Yang1-2/+27
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>
2022-09-27linux-user/s390x: Save/restore fpc when handling a signalIlya Leoshkevich1-0/+2
Linux kernel does this in fpregs_store() and fpregs_load(), so qemu-user should do this as well. Found by running valgrind's none/tests/s390x/test_sig. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220817123902.585623-1-iii@linux.ibm.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Don't assume 0 is not a valid host timer_t valuePeter Maydell1-8/+16
For handling guest POSIX timers, we currently use an array g_posix_timers[], whose entries are a host timer_t value, or 0 for "this slot is unused". When the guest calls the timer_create syscall we look through the array for a slot containing 0, and use that for the new timer. This scheme assumes that host timer_t values can never be zero. This is unfortunately not a valid assumption -- for some host libc versions, timer_t values are simply indexes starting at 0. When using this kind of host libc, the effect is that the first and second timers end up sharing a slot, and so when the guest tries to operate on the first timer it changes the second timer instead. Rework the timer allocation code, so that: * the 'slot in use' indication uses a separate array from the host timer_t array * we grab the free slot atomically, to avoid races when multiple threads call timer_create simultaneously * releasing an allocated slot is abstracted out into a new free_host_timer_slot() function called in the correct places This fixes: * problems on hosts where timer_t 0 is valid * the FIXME in next_free_host_timer() about locking * bugs in the error paths in timer_create where we forgot to release the slot we grabbed, or forgot to free the host timer Reported-by: Jon Alduan <jon.alduan@gmail.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20220725110035.1273441-1-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: fix bug about missing signum convert of sigqueuefanwenjie1-2/+2
Fixes: 66fb9763af ("basic signal handling") Fixes: cf8b8bfc50 ("linux-user: add support for rt_tgsigqueueinfo() system call") Signed-off-by: fanwenjie <fanwj@mail.ustc.edu.cn> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user/hppa: Fix setup_sigcontext()Helge Deller1-13/+3
We don't emulate a preemptive kernel on this level, and the hppa architecture doesn't allow context switches on the gateway page. So we always have to return to sc_iaoq[] and not to gr[31]. This fixes the remaining random segfaults which still occured. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20220924114501.21767-8-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user/hppa: Allow PROT_GROWSUP and PROT_GROWSDOWN in mprotect()Helge Deller1-0/+2
The hppa platform uses an upwards-growing stack and required in Linux kernels < 5.18 an executable stack for signal processing. For that some executables and libraries are marked to have an executable stack, for which glibc uses the mprotect() syscall to mark the stack like this: mprotect(xfa000000,4096,PROT_EXEC|PROT_READ|PROT_WRITE|PROT_GROWSUP). Currently qemu will return -TARGET_EINVAL for this syscall because of the checks in validate_prot_to_pageflags(), which doesn't allow the PROT_GROWSUP or PROT_GROWSDOWN flags and thus triggers this error in the guest: error while loading shared libraries: libc.so.6: cannot enable executable stack as shared object requires: Invalid argument Allow mprotect() to handle both flags and thus fix the guest. The glibc tst-execstack testcase can be used to reproduce the issue. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20220924114501.21767-7-deller@gmx.de> [lvivier: s/elif TARGET_HPPA/elif defined(TARGET_HPPA)/] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user/hppa: Increase guest stack size to 80MB for hppa targetHelge Deller3-2/+13
The hppa target requires a much bigger stack than many other targets, and the Linux kernel allocates 80 MB by default for it. This patch increases the guest stack for hppa to 80MB, and prevents that this default stack size gets reduced by a lower stack limit on the host. Since the stack grows upwards on hppa, the stack_limit value marks the upper boundary of the stack. Fix the output of /proc/self/maps (in the guest) to show the [stack] marker on the correct memory area. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20220924114501.21767-6-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user/hppa: Drop stack guard page on hppa targetHelge Deller1-4/+9
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>
2022-09-27linux-user/hppa: Add signal trampoline for hppa targetHelge Deller2-23/+32
In Linux kernel v5.18 the vDSO for signal trampoline was added. This code mimiks the bare minimum of this vDSO and thus avoids that the parisc emulation needs executable stacks. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20220924114501.21767-4-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Add proper strace format strings for getdents()/getdents64()Helge Deller1-2/+2
Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20220924114501.21767-3-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Fix TARGET_PROT_SEM for XTENSAHelge Deller1-1/+1
The xtensa platform has a value of 0x10 for PROT_SEM. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220924114501.21767-2-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Passthrough MADV_DONTNEED for certain file mappingsIlya Leoshkevich1-5/+22
This is a follow-up for commit 892a4f6a750a ("linux-user: Add partial support for MADV_DONTNEED"), which added passthrough for anonymous mappings. File mappings can be handled in a similar manner. In order to do that, mark pages, for which mmap() was passed through, with PAGE_PASSTHROUGH, and then allow madvise() passthrough for these pages. Drop the explicit PAGE_ANON check, since anonymous mappings are expected to have PAGE_PASSTHROUGH anyway. Add PAGE_PASSTHROUGH to PAGE_STICKY in order to keep it on mprotect(). Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220725125043.43048-1-iii@linux.ibm.com> Message-Id: <20220906000839.1672934-5-iii@linux.ibm.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Implement stracing madvise()Ilya Leoshkevich2-1/+42
The default implementation has several problems: the first argument is not displayed as a pointer, making it harder to grep; the third argument is not symbolized; and there are several extra unused arguments. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220906000839.1672934-4-iii@linux.ibm.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Fix madvise(MADV_DONTNEED) on alphaIlya Leoshkevich1-1/+2
MADV_DONTNEED has a different value on alpha, compared to all the other architectures. Fix by using TARGET_MADV_DONTNEED instead of MADV_DONTNEED. Fixes: 892a4f6a750a ("linux-user: Add partial support for MADV_DONTNEED") Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220906000839.1672934-3-iii@linux.ibm.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Provide MADV_* definitionsIlya Leoshkevich22-0/+134
Provide MADV_* definitions using target_mman.h header, similar to what kernel does. Most architectures use the same values, with the exception of alpha and hppa. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220906000839.1672934-2-iii@linux.ibm.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Show timespec on strace for futex()Helge Deller1-1/+10
Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220918194555.83535-11-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Add strace for clock_nanosleep()Helge Deller2-1/+17
Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220918194555.83535-10-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user/hppa: Set TASK_UNMAPPED_BASE to 0xfa000000 for hppa archHelge Deller1-0/+4
On the parisc architecture the stack grows upwards. Move the TASK_UNMAPPED_BASE to high memory area as it's done by the kernel on physical machines. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20220918194555.83535-9-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-09-27linux-user: Fix strace of chmod() if mode == 0Helge Deller1-0/+5
If the mode parameter of chmod() is zero, this value isn't shown when stracing a program: chmod("filename",) This patch fixes it up to show the zero-value as well: chmod("filename",000) Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20220918194555.83535-8-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
generated by cgit v1.1 at 2024-12-27 14:11:10 +0000