aboutsummaryrefslogtreecommitdiff
path: root/linux-user
AgeCommit message (Collapse)Author
2022-05-23linux-user/elfload: Remove pointless non-const CPUArchState castPhilippe Mathieu-Daudé
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>
2022-05-23linux-user/syscall.c: fix build without RLIMIT_RTTIMEFabrice Fontaine
RLIMIT_RTTIME is not provided by uclibc-ng or by musl prior to version 1.2.0 and https://github.com/bminor/musl/commit/2507e7f5312e79620f6337935d0a6c9045ccba09 resulting in the following build failure since https://git.qemu.org/?p=qemu.git;a=commit;h=244fd08323088db73590ff2317dfe86f810b51d7: ../linux-user/syscall.c: In function 'target_to_host_resource': ../linux-user/syscall.c:1057:16: error: 'RLIMIT_RTTIME' undeclared (first use in this function); did you mean 'RLIMIT_NOFILE'? 1057 | return RLIMIT_RTTIME; | ^~~~~~~~~~~~~ | RLIMIT_NOFILE Fixes: - http://autobuild.buildroot.org/results/22d3b584b704613d030e1ea9e6b709b713e4cc26 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220523105239.1499162-1-fontaine.fabrice@gmail.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-05-23linux-user: Clean up arg_start/arg_end confusionRichard Henderson
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>
2022-05-11Clean up decorations and whitespace around header guardsMarkus Armbruster
Cleaned up with scripts/clean-header-guards.pl. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20220506134911.2856099-5-armbru@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Handle various SIGILL exceptionsRichard Henderson
We missed out on a couple of exception types that may legitimately be raised by a userland program. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-59-richard.henderson@linaro.org>
2022-04-26target/nios2: Advance pc when raising exceptionsRichard Henderson
The exception return address for nios2 is the instruction after the one that was executing at the time of the exception. We have so far implemented this by advancing the pc during the process of raising the exception. It is perhaps a little less confusing to do this advance in the translator (and helpers) when raising the exception in the first place, so that we may more closely match kernel sources. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20220421151735.31996-58-richard.henderson@linaro.org>
2022-04-26target/nios2: Implement Misaligned destination exceptionRichard Henderson
Indirect branches, plus eret and bret optionally raise an exception when branching to a misaligned address. The exception is required when an mmu is enabled, but enable it always because the fallback behaviour is not documented (though presumably it discards low bits). For the purposes of the linux-user cpu loop, if EXCP_UNALIGN (misaligned data) were to arrive, it would be treated the same as EXCP_UNALIGND (misaligned destination). See the !defined(CONFIG_NIOS2_ALIGNMENT_TRAP) block in kernel/traps.c. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-53-richard.henderson@linaro.org>
2022-04-26target/nios2: Support division error exceptionRichard Henderson
Division may (optionally) raise a division exception. Since the linux kernel has been prepared for this for some time, enable it by default. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-42-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Only initialize SP and PC in target_cpu_copy_regsRichard Henderson
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>
2022-04-26target/nios2: Split PC out of env->regs[]Richard Henderson
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>
2022-04-26linux-user/nios2: Use force_sig_fault for EXCP_DEBUGRichard Henderson
Use the simpler signal interface, which forces us to supply the missing PC value to si_addr. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20220421151735.31996-13-richard.henderson@linaro.org>
2022-04-26target/nios2: Remove nios2_cpu_record_sigsegvRichard Henderson
Since f5ef0e518d0, we have a real page mapped for kuser, which means the special casing for SIGSEGV can go away. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20220421151735.31996-11-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Use QEMU_ESIGRETURN from do_rt_sigreturnRichard Henderson
Drop the kernel-specific "pr2" code structure and use the qemu-specific error return value. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-8-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Remove do_sigreturnRichard Henderson
There is no sigreturn syscall, only rt_sigreturn. This function is unused. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-7-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Handle special qemu syscall return valuesRichard Henderson
Honor QEMU_ESIGRETURN and QEMU_ERESTARTSYS. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-6-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Adjust error returnRichard Henderson
Follow the kernel assembly, which considers all negative return values to be errors. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-5-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Drop syscall 0 "workaround"Richard Henderson
Syscall 0 is __NR_io_setup for this target; there is nothing to work around. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Fixes: a0a839b65b6 ("nios2: Add usermode binaries emulation") Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-4-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Fix clone child returnRichard Henderson
The child side of clone needs to set the secondary syscall return value, r7, to indicate syscall success. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-3-richard.henderson@linaro.org>
2022-04-26linux-user/nios2: Hoist pc advance to the top of EXCP_TRAPRichard Henderson
Note that this advance *should* be done by the translator, as that's the pc value that's supposed to be generated by hardware. However, that's a much larger change across sysemu as well. In the meantime, produce the correct PC for any signals raised by the trap instruction. Note the special case of TRAP_BRKPT, which itself is special cased within the kernel. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-2-richard.henderson@linaro.org>
2022-04-22target/arm: Change CPUArchState.thumb to boolRichard Henderson
Bool is a more appropriate type for this value. Adjust the assignments to use true/false. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-04-21compiler.h: replace QEMU_NORETURN with G_NORETURNMarc-André Lureau
G_NORETURN was introduced in glib 2.68, fallback to G_GNUC_NORETURN in glib-compat. Note that this attribute must be placed before the function declaration (bringing a bit of consistency in qemu codebase usage). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Warner Losh <imp@bsdimp.com> Message-Id: <20220420132624.2439741-20-marcandre.lureau@redhat.com>
2022-04-21include: rename qemu-common.h qemu/help-texts.hMarc-André Lureau
Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Warner Losh <imp@bsdimp.com> Message-Id: <20220420132624.2439741-7-marcandre.lureau@redhat.com>
2022-04-20Merge tag 'pull-tcg-20220420' of https://gitlab.com/rth7680/qemu into stagingRichard Henderson
Cleanup sysemu/tcg.h usage. Fix indirect lowering vs cond branches Remove ATOMIC_MMU_IDX Add tcg_constant_ptr # -----BEGIN PGP SIGNATURE----- # # iQFRBAABCgA7FiEEekgeeIaLTbaoWgXAZN846K9+IV8FAmJgW38dHHJpY2hhcmQu # aGVuZGVyc29uQGxpbmFyby5vcmcACgkQZN846K9+IV8tpggApfg2CDI0bRMDBh0g # 04/xwNnzHuSa84/ocMOMUfD5pvBblUmeTH8fAwqcAPDM/EEZwWZl2V1bYzuIrbmR # 8zV+r1cOenDF5Tz8PWfy8XssinTVtTWh/TE0XNV9R/SbEM9eMsjHNu5osKVuLuq1 # rnHWZf8LuY7xGsy4GYqPN0dLE6HtQOfpj/eLGRAj9mZ7re0jKeWg3GdxYoiYDmks # NKmNHYcWD+SjjFvXlOafniQsHbBZmQc/qp7AShG/+VcYY9o1VfncWD6I2dV13RdB # N7++ZhGyQR4NOVo6CN1zLKhfuJqzH2q+qJ7vQ3xtXNAk53LGQ91zjoE+3KaJTrcy # dmnLUw== # =aKdS # -----END PGP SIGNATURE----- # gpg: Signature made Wed 20 Apr 2022 12:14:07 PM PDT # gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F # gpg: issuer "richard.henderson@linaro.org" # gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate] * tag 'pull-tcg-20220420' of https://gitlab.com/rth7680/qemu: tcg: Add tcg_constant_ptr accel/tcg: Remove ATOMIC_MMU_IDX tcg: Fix indirect lowering vs TCG_OPF_COND_BRANCH Don't include sysemu/tcg.h if it is not necessary Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-04-20Don't include sysemu/tcg.h if it is not necessaryThomas Huth
This header only defines the tcg_allowed variable and the tcg_enabled() function - which are not required in many files that include this header. Drop the #include statement there. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20220315144107.1012530-1-thuth@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-04-20linux-user: Use qemu_set_log_filename_flagsRichard Henderson
Perform all logfile setup in one step. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-30-richard.henderson@linaro.org>
2022-04-20linux-user: Expand log_page_dump inlineRichard Henderson
We have extra stuff to log at the same time. Hoist the qemu_log_lock/unlock to the caller and use fprintf. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-23-richard.henderson@linaro.org>
2022-04-20util/log: Pass Error pointer to qemu_set_logRichard Henderson
Do not force exit within qemu_set_log; return bool and pass an Error value back up the stack as per usual. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-5-richard.henderson@linaro.org>
2022-04-20util/log: Drop manual log bufferingRichard Henderson
This buffering was introduced during the Paleozoic: 9fa3e853531. There has never been an explanation as to why we may not allow glibc to allocate the file buffer itself. We certainly have many other uses of mmap and malloc during user-only startup, so presumably whatever the issue was, it has been fixed during the preceeding 18 years. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-2-richard.henderson@linaro.org>
2022-04-06Remove qemu-common.h include from most unitsMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-04-06Replace qemu_real_host_page variables with inlined functionsMarc-André Lureau
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>
2022-04-06Replace TARGET_WORDS_BIGENDIANMarc-André Lureau
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>
2022-04-06Replace config-time define HOST_WORDS_BIGENDIANMarc-André Lureau
Replace a config-time define with a compile time condition define (compatible with clang and gcc) that must be declared prior to its usage. This avoids having a global configure time define, but also prevents from bad usage, if the config header wasn't included before. This can help to make some code independent from qemu too. gcc supports __BYTE_ORDER__ from about 4.6 and clang from 3.2. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> [ For the s390x parts I'm involved in ] Acked-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220323155743.1585078-7-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-04-04linux-user/ppc: Narrow type of ccr in save_user_regsRichard Henderson
Coverity warns that we shift a 32-bit value by N, and then accumulate it into a 64-bit type (target_ulong on ppc64). The ccr is always 8 * 4-bit fields, and thus is always a 32-bit quantity; narrow the type to avoid the warning. Fixes: Coverity CID 1487223 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Cédric Le Goater <clg@kaod.org> Message-Id: <20220401191643.330393-1-richard.henderson@linaro.org> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-03-31linux-user/sh4/termbits: Silence warning about TIOCSER_TEMT double definitionThomas Huth
Seen while compiling on Alpine: In file included from ../linux-user/strace.c:17: In file included from ../linux-user/qemu.h:11: In file included from ../linux-user/syscall_defs.h:1247: ../linux-user/sh4/termbits.h:276:10: warning: 'TIOCSER_TEMT' macro redefined [-Wmacro-redefined] # define TIOCSER_TEMT 0x01 /* Transmitter physically empty */ ^ /usr/include/sys/ioctl.h:50:9: note: previous definition is here #define TIOCSER_TEMT 1 ^ 1 warning generated. Add the TARGET_ prefix here, too, like we do it on the other architectures. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> Message-Id: <20220330134302.979686-1-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-23linux-user/arm: Implement __kernel_cmpxchg64 with host atomicsRichard Henderson
If CONFIG_ATOMIC64, we can use a host cmpxchg and provide atomicity across processes; otherwise we have no choice but to continue using start/end_exclusive. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220323005839.94327-4-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-23linux-user/arm: Implement __kernel_cmpxchg with host atomicsRichard Henderson
The existing implementation using start/end_exclusive does not provide atomicity across processes. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220323005839.94327-3-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-23linux-user/arm: Implement __kernel_memory_barrierRichard Henderson
This fallback syscall was stubbed out. It would only matter for emulating pre-armv6. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220323005839.94327-2-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-22linux-user: Fix missing space in error messageFergus Henderson
Signed-off-by: Fergus Henderson <fergus@google.com> Signed-off-by: Patrick Venture <venture@google.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20220310192148.1696486-1-venture@google.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-22linux-user: Properly handle sigset arg to ppollRichard Henderson
Unblocked signals are never delivered, because we didn't record the new mask for process_pending_signals. Handle this with the same mechanism as sigsuspend. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220315084308.433109-6-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-22linux-user: Properly handle sigset arg to epoll_pwaitRichard Henderson
Unblocked signals are never delivered, because we didn't record the new mask for process_pending_signals. Handle this with the same mechanism as sigsuspend. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220315084308.433109-5-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-22linux-user: Properly handle sigset arg to pselectRichard Henderson
Unblocked signals are never delivered, because we didn't record the new mask for process_pending_signals. Handle this with the same mechanism as sigsuspend. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/834 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220315084308.433109-4-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-22linux-user: Split out helpers for sigsuspendRichard Henderson
Two new functions: process_sigsuspend_mask and finish_sigsuspend_mask. Move the size check and copy-from-user code. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220315084308.433109-3-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-22linux-user/alpha: Fix sigsuspend for big-endian hostsRichard Henderson
On alpha, the sigset argument for sigsuspend is in a register. When we drop that into memory that happens in host-endianness, but target_to_host_old_sigset will treat it as target-endianness. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220315084308.433109-2-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-22linux-user: Fix syscall parameter handling for MIPS n32WANG Xuerui
The MIPS n32 ABI is basically n64 with the address space (i.e. pointer width) shrinked to 32 bits. Meanwhile the current code treats it as o32-like based on TARGET_ABI_BITS, which causes problems with n32 syscalls utilizing 64-bit offsets, like pread64, affecting most (if not all) recently built n32 binaries. This partially solves issue #909 ("qemu-mipsn32(el) user mode emulator fails to execute any recently built n32 binaries"); with this change applied, the built qemu-mipsn32el is able to progress beyond the pread64, and finish _dl_start_user for the "getting ld.so load libc.so" case. The program later dies with SIGBUS, though, due to _dl_start_user not maintaining stack alignment after removing ld.so itself from argv, and qemu-user starting to enforce alignment recently, but that is orthogonal to the issue here; the more common case of chrooting is working, verified with my own-built Gentoo n32 sysroot. (Depending on the exact ISA used, one may have to explicitly specify QEMU_CPU, which is the case for my chroot.) Buglink: https://gitlab.com/qemu-project/qemu/-/issues/909 Signed-off-by: WANG Xuerui <xen0n@gentoo.org> Cc: Laurent Vivier <laurent@vivier.eu> Cc: Philippe Mathieu-Daudé <f4bug@amsat.org> Cc: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: Andreas K. Hüttel <dilfridge@gentoo.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20220320052259.1610883-1-xen0n@gentoo.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-21Merge tag 'pull-misc-2022-03-21' of git://repo.or.cz/qemu/armbru into stagingPeter Maydell
Miscellaneous patches patches for 2022-03-21 # gpg: Signature made Mon 21 Mar 2022 14:48:16 GMT # gpg: using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653 # gpg: issuer "armbru@redhat.com" # gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full] # gpg: aka "Markus Armbruster <armbru@pond.sub.org>" [full] # Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653 * tag 'pull-misc-2022-03-21' of git://repo.or.cz/qemu/armbru: Use g_new() & friends where that makes obvious sense 9pfs: Use g_new() & friends where that makes obvious sense scripts/coccinelle: New use-g_new-etc.cocci block-qdict: Fix -Werror=maybe-uninitialized build failure Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-03-21Use g_new() & friends where that makes obvious senseMarkus Armbruster
g_new(T, n) is neater than g_malloc(sizeof(T) * n). It's also safer, for two reasons. One, it catches multiplication overflowing size_t. Two, it returns T * rather than void *, which lets the compiler catch more type errors. This commit only touches allocations with size arguments of the form sizeof(T). Patch created mechanically with: $ spatch --in-place --sp-file scripts/coccinelle/use-g_new-etc.cocci \ --macro-file scripts/cocci-macro-file.h FILES... Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20220315144156.1595462-4-armbru@redhat.com> Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
2022-03-20ppc64: Avoid pt_regs struct definitionKhem Raj
Remove pt_regs indirection and instead reference gp_regs directly, this makes it portable across musl/glibc Use PT_* constants defined in asm/ptrace.h Move the file to ppc64 subdir and leave ppc empty Fixes ../qemu-6.2.0/linux-user/host/ppc64/../ppc/host-signal.h:16:32: error: incomplete definition of type 'struct pt_regs' return uc->uc_mcontext.regs->nip; ~~~~~~~~~~~~~~~~~~~~^ Signed-off-by: Khem Raj <raj.khem@gmail.com> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Philippe Mathieu-Daudé <f4bug@amsat.org> Cc: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220315015740.847370-1-raj.khem@gmail.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-03-08linux-user/ppc: deliver SIGTRAP on POWERPC_EXCP_TRAPMatheus Ferst
Handle POWERPC_EXCP_TRAP in cpu_loop to deliver SIGTRAP on tw[i]/td[i]. The si_code comes from do_program_check in the kernel source file arch/powerpc/kernel/traps.c Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br> Message-Id: <20220113170456.1796911-2-matheus.ferst@eldorado.org.br> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-03-08linux-user: Remove stale "not threadsafe" commentsPeter Maydell
In linux-user/signal.c we have two FIXME comments claiming that parts of the signal-handling code are not threadsafe. These are very old, as they were first introduced in commit 624f7979058 in 2008. Since then we've radically overhauled the signal-handling logic, while carefully preserving these FIXME comments. It's unclear exactly what thread-safety issue the original author was trying to point out -- the relevant data structures are in the TaskStruct, which makes them per-thread and only operated on by that thread. The old code at the time of that commit did have various races involving signal handlers being invoked at awkward times; possibly this was what was meant. Delete these FIXME comments: * they were written at a time when the way we handled signals was completely different * the code today appears to us to not have thread-safety issues * nobody knows what the problem the comments were trying to point out was so they are serving no useful purpose for us today. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Warner Losh <imp@bsdimp.com> Message-Id: <20220114155032.3767771-1-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-02-21linux-user: Add missing "qemu/timer.h" includePhilippe Mathieu-Daudé
"qemu/timer.h" declares cpu_get_host_ticks(). Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220207082756.82600-9-f4bug@amsat.org> Signed-off-by: Thomas Huth <thuth@redhat.com>
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-29 06:02:30 +0000