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2023-10-31Merge tag 'pull-lu-20231030' of https://gitlab.com/rth7680/qemu into stagingStefan Hajnoczi
linux-user: Fix guest signal remapping after adjusting SIGABRT linux-user: Implement VDSOs * tag 'pull-lu-20231030' of https://gitlab.com/rth7680/qemu: (21 commits) build: Add update-linux-vdso makefile rule linux-user: Show vdso address in /proc/pid/maps linux-user/s390x: Add vdso linux-user/s390x: Rename __SIGNAL_FRAMESIZE to STACK_FRAME_OVERHEAD linux-user/ppc: Add vdso linux-user/loongarch64: Add vdso linux-user/riscv: Add vdso linux-user/hppa: Add vdso linux-user/arm: Add vdso linux-user/aarch64: Add vdso linux-user/x86_64: Add vdso linux-user/i386: Add vdso linux-user: Add gen-vdso tool linux-user: Load vdso image if available linux-user: Replace bprm->fd with bprm->src.fd linux-user: Use ImageSource in load_symbols linux-user: Use ImageSource in load_elf_image linux-user: Do not clobber bprm_buf swapping ehdr linux-user: Tidy loader_exec linux-user: Introduce imgsrc_read, imgsrc_read_alloc ... Conflicts: linux-user/arm/signal.c Fix an #include context conflict. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-10-30linux-user: Show vdso address in /proc/pid/mapsRichard Henderson
Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/s390x: Add vdsoRichard Henderson
Acked-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/s390x: Rename __SIGNAL_FRAMESIZE to STACK_FRAME_OVERHEADRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/ppc: Add vdsoRichard Henderson
Add support in gen-vdso-elfn.c.inc for the DT_PPC64_OPT dynamic tag: this is an integer, so does not need relocation. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/loongarch64: Add vdsoRichard Henderson
Requires a relatively recent binutils version in order to avoid spurious R_LARCH_NONE relocations. The presence of these relocs are diagnosed by our gen-vdso tool. Tested-by: Song Gao <gaosong@loongson.cn> Reviewed-by: Song Gao <gaosong@loongson.cn> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/riscv: Add vdsoRichard Henderson
Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/hppa: Add vdsoRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/arm: Add vdsoRichard Henderson
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/aarch64: Add vdsoRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/x86_64: Add vdsoRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user/i386: Add vdsoRichard Henderson
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1267 Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Add gen-vdso toolRichard Henderson
This tool will be used for post-processing the linked vdso image, turning it into something that is easy to include into elfload.c. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Load vdso image if availableRichard Henderson
The vdso image will be pre-processed into a C data array, with a simple list of relocations to perform, and identifying the location of signal trampolines. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Replace bprm->fd with bprm->src.fdRichard Henderson
There are only a couple of uses of bprm->fd remaining. Migrate to the other field. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Use ImageSource in load_symbolsRichard Henderson
Aside from the section headers, we're unlikely to hit the ImageSource cache on guest executables. But the interface for imgsrc_read_* is better. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Use ImageSource in load_elf_imageRichard Henderson
Change parse_elf_properties as well, as the bprm_buf argument ties the two functions closely. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Do not clobber bprm_buf swapping ehdrRichard Henderson
Rearrange the allocation of storage for ehdr between load_elf_image and load_elf_binary. The same set of copies are done, but we don't modify bprm_buf, which will be important later. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Tidy loader_execRichard Henderson
Reorg the if cases to reduce indentation. Test for 4 bytes in the file before checking the signatures. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-30linux-user: Introduce imgsrc_read, imgsrc_read_allocRichard Henderson
Introduced and initialized, but not yet really used. These will tidy the current tests vs BPRM_BUF_SIZE. 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>
2023-10-30linux-user: Fix guest signal remapping after adjusting SIGABRTRichard Henderson
The arithmetic within the loop was not adjusted properly after SIGRTMIN was stolen for the guest SIGABRT. The effect was that the guest libc could not send itself __SIGRTMIN to wake sleeping threads. Fixes: 38ee0a7dfb4b ("linux-user: Remap guest SIGABRT") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1967 Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-27target/arm: Move feature test functions to their own headerPeter Maydell
The feature test functions isar_feature_*() now take up nearly a thousand lines in target/arm/cpu.h. This header file is included by a lot of source files, most of which don't need these functions. Move the feature test functions to their own header file. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20231024163510.2972081-2-peter.maydell@linaro.org
2023-10-25target/sparc: Remove sparcv7 cpu featuresRichard Henderson
The oldest supported cpu is the microsparc 1; all other cpus use CPU_DEFAULT_FEATURES. Remove the features that must always be present for sparcv7: FLOAT, SWAP, FLUSH, FSQRT, FMUL. Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Remap guest SIGABRTRichard Henderson
Distinguish host SIGABRT from guest SIGABRT by mapping the guest signal onto one of the host RT signals. This prevents a cycle by which a host assertion failure is caught and handled by host_signal_handler, queued for the guest, and then we attempt to continue past the host abort. What happens next depends on the host libc, but is neither good nor helpful. Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Detect and report host SIGILL, SIGFPE, SIGTRAPRichard Henderson
These signals, when not spoofed via kill(), are always bugs. Use die_from_signal to report this sensibly. Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Split out host_sig{segv,bus}_handlerRichard Henderson
Make host_signal_handler slightly easier to read. Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Simplify signal_initRichard Henderson
Install the host signal handler at the same time we are probing the target signals for SIG_IGN/SIG_DFL. Ignore unmapped target signals. Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Map unsupported signals to an out-of-bounds valueRichard Henderson
Do not return a valid signal number in one domain when given an invalid signal number in the other domain. Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Only register handlers for core_dump_signal by defaultRichard Henderson
The set of fatal signals is really immaterial. If one arrives, and is unhandled, then the qemu process dies and the parent gets the correct signal. It is only for those signals which we would like to perform a guest core dump instead of a host core dump that we need to catch. Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Detect and report host crashesHelge Deller
If there is an internal program error in the qemu source code which raises SIGSEGV or SIGBUS, we currently assume the signal belongs to the guest. With an artificial error introduced, we will now print QEMU internal SIGSEGV {code=MAPERR, addr=(nil)} Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20230812164314.352131-1-deller@gmx.de> [rth: Use in_code_gen_buffer and die_with_signal; drop backtrace] Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Exit not abort in die_with_backtraceRichard Henderson
This line is supposed to be unreachable, but if we're going to have it at all, SIGABRT via abort() is subject to the same signal peril that created this function in the first place. We can _exit immediately without peril. Acked-by: Helge Deller <deller@gmx.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Split out die_with_signalRichard Henderson
Because we trap so many signals for use by the guest, we have to take extra steps to exit properly. Acked-by: Helge Deller <deller@gmx.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Propagate failure in mmap_reserve_or_unmap back to target_munmapRichard Henderson
Do not assert success, but return any failure received. Additionally, fix the method of earlier error return in target_munmap. Reported-by: Andreas Schwab <schwab@suse.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user/elfload: Enable LSX/LASX in HWCAP for LoongArchJiajie Chen
Since support for LSX and LASX is landed in QEMU recently, we can update HWCAPS accordingly. Signed-off-by: Jiajie Chen <c@jia.je> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20231001085315.1692667-1-c@jia.je> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user/sh4: Fix crashes on signal deliveryMikulas Patocka
sh4 uses gUSA (general UserSpace Atomicity) to provide atomicity on CPUs that don't have atomic instructions. A gUSA region that adds 1 to an atomic variable stored in @R2 looks like this: 4004b6: 03 c7 mova 4004c4 <gusa+0x10>,r0 4004b8: f3 61 mov r15,r1 4004ba: 09 00 nop 4004bc: fa ef mov #-6,r15 4004be: 22 63 mov.l @r2,r3 4004c0: 01 73 add #1,r3 4004c2: 32 22 mov.l r3,@r2 4004c4: 13 6f mov r1,r15 R0 contains a pointer to the end of the gUSA region R1 contains the saved stack pointer R15 contains negative length of the gUSA region When this region is interrupted by a signal, the kernel detects if R15 >= -128U. If yes, the kernel rolls back PC to the beginning of the region and restores SP by copying R1 to R15. The problem happens if we are interrupted by a signal at address 4004c4. R15 still holds the value -6, but the atomic value was already written by an instruction at address 4004c2. In this situation we can't undo the gUSA. The function unwind_gusa does nothing, the signal handler attempts to push a signal frame to the address -6 and crashes. This patch fixes it, so that if we are interrupted at the last instruction in a gUSA region, we copy R1 to R15 to restore the correct stack pointer and avoid crashing. There's another bug: if we are interrupted in a delay slot, we save the address of the instruction in the delay slot. We must save the address of the previous instruction. Cc: qemu-stable@nongnu.org Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reviewed-by: Yoshinori Sato <ysato@users.sourcefoege.jp> Message-Id: <b16389f7-6c62-70b7-59b3-87533c0bcc@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user/mips: fix abort on integer overflowMikulas Patocka
QEMU mips userspace emulation crashes with "qemu: unhandled CPU exception 0x15 - aborting" when one of the integer arithmetic instructions detects an overflow. This patch fixes it so that it delivers SIGFPE with FPE_INTOVF instead. Cc: qemu-stable@nongnu.org Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Message-Id: <3ef979a8-3ee1-eb2d-71f7-d788ff88dd11@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-18linux-user: Fixes for zero_bssRichard Henderson
The previous change, 2d385be6152, assumed !PAGE_VALID meant that the page would be unmapped by the elf image. However, since we reserved the entire image space via mmap, PAGE_VALID will always be set. Instead, assume PROT_NONE for the same condition. Furthermore, assume bss is only ever present for writable segments, and that there is no page overlap between PT_LOAD segments. Instead of an assert, return false to indicate failure. Cc: qemu-stable@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1854 Fixes: 2d385be6152 ("linux-user: Do not adjust zero_bss for host page size") Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-06linux-user/syscall.c: clean up local variable shadowing in xattr syscallsLaurent Vivier
p is a generic variable in syscall() and can be used by any syscall case, so this patch removes the useless local variable declaration for the following syscalls: TARGET_NR_llistxattr, TARGET_NR_listxattr, TARGET_NR_setxattr, TARGET_NR_lsetxattr, TARGET_NR_getxattr, TARGET_NR_lgetxattr, TARGET_NR_removexattr, TARGET_NR_lremovexattr. Fix following warnings: .../linux-user/syscall.c:12342:15: warning: declaration of 'p' shadows a previous local [-Wshadow=compatible-local] 12342 | void *p, *b = 0; | ^ .../linux-user/syscall.c:8975:11: note: shadowed declaration is here 8975 | void *p; | ^ .../linux-user/syscall.c:12379:19: warning: declaration of 'p' shadows a previous local [-Wshadow=compatible-local] 12379 | void *p, *n, *v = 0; | ^ .../linux-user/syscall.c:8975:11: note: shadowed declaration is here 8975 | void *p; | ^ .../linux-user/syscall.c:12424:19: warning: declaration of 'p' shadows a previous local [-Wshadow=compatible-local] 12424 | void *p, *n, *v = 0; | ^ .../linux-user/syscall.c:8975:11: note: shadowed declaration is here 8975 | void *p; | ^ .../linux-user/syscall.c:12469:19: warning: declaration of 'p' shadows a previous local [-Wshadow=compatible-local] 12469 | void *p, *n; | ^ .../linux-user/syscall.c:8975:11: note: shadowed declaration is here 8975 | void *p; | ^ Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20230925151029.461358-6-laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-10-06linux-user/syscall.c: clean up local variable shadowing in TARGET_NR_getcpuLaurent Vivier
Fix following warnings: .../linux-user/syscall.c: In function 'do_syscall1': .../linux-user/syscall.c:11180:22: warning: declaration of 'cpu' shadows a previous local [-Wshadow=local] 11180 | unsigned cpu, node; | ^~~ .../linux-user/syscall.c:8963:15: note: shadowed declaration is here 8963 | CPUState *cpu = env_cpu(cpu_env); | ^~~ Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20230925151029.461358-5-laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-10-06linux-user/syscall.c: clean up local variable shadowing in do_ioctl_dm()Laurent Vivier
Fix following warnings: .../linux-user/syscall.c: In function 'do_ioctl_dm': .../linux-user/syscall.c:5053:23: warning: declaration of 'arg_type' shadows a previous local [-Wshadow=local] 5053 | const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_target_spec) }; | ^~~~~~~~ .../linux-user/syscall.c:4991:20: note: shadowed declaration is here 4991 | const argtype *arg_type = ie->arg_type; | ^~~~~~~~ ...//linux-user/syscall.c:5102:27: warning: declaration of 'arg_type' shadows a previous local [-Wshadow=local] 5102 | const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_name_list) }; | ^~~~~~~~ .../linux-user/syscall.c:4991:20: note: shadowed declaration is here 4991 | const argtype *arg_type = ie->arg_type; | ^~~~~~~~ .../linux-user/syscall.c:5130:27: warning: declaration of 'arg_type' shadows a previous local [-Wshadow=local] 5130 | const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_target_spec) }; | ^~~~~~~~ .../linux-user/syscall.c:4991:20: note: shadowed declaration is here 4991 | const argtype *arg_type = ie->arg_type; | ^~~~~~~~ .../linux-user/syscall.c:5170:27: warning: declaration of 'arg_type' shadows a previous local [-Wshadow=local] 5170 | const argtype arg_type[] = { MK_STRUCT(STRUCT_dm_target_versions) }; | ^~~~~~~~ .../linux-user/syscall.c:4991:20: note: shadowed declaration is here 4991 | const argtype *arg_type = ie->arg_type; | ^~~~~~~~ Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20230925151029.461358-4-laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-10-06linux-user/mmap.c: clean up local variable shadowingLaurent Vivier
Fix following warnings: .../linux-user/mmap.c: In function 'target_mremap': .../linux-user/mmap.c:913:13: warning: declaration of 'prot' shadows a previous local [-Wshadow=compatible-local] 913 | int prot = 0; | ^~~~ ../../../Projects/qemu/linux-user/mmap.c:871:9: note: shadowed declaration is here 871 | int prot; | ^~~~ Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20230925151029.461358-3-laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-10-06linux-user/flatload: clean up local variable shadowingLaurent Vivier
Fix following warnings: .../linux-user/flatload.c: In function 'load_flt_binary': .../linux-user/flatload.c:758:23: warning: declaration of 'p' shadows a previous local [-Wshadow=compatible-local] 758 | abi_ulong p; | ^ ../../../Projects/qemu/linux-user/flatload.c:722:15: note: shadowed declaration is here 722 | abi_ulong p; | ^ Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20230925151029.461358-2-laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-10-04build: Remove --enable-gprofRichard Henderson
This build option has been deprecated since 8.0. Remove all CONFIG_GPROF code that depends on that, including one errant check using TARGET_GPROF. Acked-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-04linux-user/hppa: Fix struct target_sigcontext layoutRichard Henderson
Use abi_ullong not uint64_t so that the alignment of the field and therefore the layout of the struct is correct. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-04tcg: Split out tcg init functions to tcg/startup.hRichard Henderson
The tcg/tcg.h header is a big bucket, containing stuff related to the translators and the JIT backend. The places that initialize tcg or create new threads do not need all of that, so split out these three functions to a new header. Suggested-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-04tcg: Remove argument to tcg_prologue_initRichard Henderson
We can load tcg_ctx just as easily within the callee. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-04accel/tcg: Replace CPUState.env_ptr with cpu_env()Richard Henderson
Reviewed-by: Anton Johansson <anjo@rev.ng> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-29linux-user/strace: Clean up local variable shadowingPhilippe Mathieu-Daudé
Fix: linux-user/strace.c: In function ‘print_sockaddr’: linux-user/strace.c:370:17: warning: declaration of ‘i’ shadows a previous local [-Wshadow=compatible-local] 370 | int i; | ^ linux-user/strace.c:361:9: note: shadowed declaration is here 361 | int i; | ^ Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20230904161235.84651-20-philmd@linaro.org> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-09-21target/arm: Enable FEAT_MOPS for CPU 'max'Peter Maydell
Enable FEAT_MOPS on the AArch64 'max' CPU, and add it to the list of features we implement. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20230912140434.1333369-13-peter.maydell@linaro.org
2023-09-21target/arm: Implement FEAT_HBCPeter Maydell
FEAT_HBC (Hinted conditional branches) provides a new instruction BC.cond, which behaves exactly like the existing B.cond except that it provides a hint to the branch predictor about the likely behaviour of the branch. Since QEMU does not implement branch prediction, we can treat this identically to B.cond. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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