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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>
2023-09-21linux-user/elfload.c: Report previously missing arm32 hwcapsPeter Maydell
Add the code to report the arm32 hwcaps we were previously missing: ss, ssbs, fphp, asimdhp, asimddp, asimdfhm, asimdbf16, i8mm Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-21linux-user/elfload.c: Add missing arm and arm64 hwcap valuesPeter Maydell
Our lists of Arm 32 and 64 bit hwcap values have lagged behind the Linux kernel. Update them to include all the bits defined as of upstream Linux git commit a48fa7efaf1161c1 (in the middle of the kernel 6.6 dev cycle). For 64-bit, we don't yet implement any of the features reported via these hwcap bits. For 32-bit we do in fact already implement them all; we'll add the code to set them in a subsequent commit. 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>
2023-09-21linux-user/elfload.c: Correct SME feature names reported in cpuinfoPeter Maydell
Some of the names we use for CPU features in linux-user's dummy /proc/cpuinfo don't match the strings in the real kernel in arch/arm64/kernel/cpuinfo.c. Specifically, the SME related features have an underscore in the HWCAP_FOO define name, but (like the SVE ones) they do not have an underscore in the string in cpuinfo. Correct the errors. Fixes: a55b9e7226708 ("linux-user: Emulate /proc/cpuinfo on aarch64 and arm") 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>
2023-09-20Merge tag 'pull-loongarch-20230920' of https://gitlab.com/gaosong/qemu into ↵Stefan Hajnoczi
staging Add LASX instructions support. # -----BEGIN PGP SIGNATURE----- # # iLMEAAEIAB0WIQS4/x2g0v3LLaCcbCxAov/yOSY+3wUCZQqV7wAKCRBAov/yOSY+ # 35GTA/9rXGbr9pIUnlGstUnWzIJb0vs6f4kt9DaKRPF1zyxaF/59sgl3gqCNAjBA # eAKfm5W4B8ABJ+PYR3ZVAg9AcAP9AOEi+qV6DgRwvYPPK3WbGqIpJL7i+7gNMMUs # gppv+IfJEkri8YLXXa7GWffuGOebqdqyD6Pl1B2eiKS4KYSRGw== # =fNr2 # -----END PGP SIGNATURE----- # gpg: Signature made Wed 20 Sep 2023 02:49:19 EDT # gpg: using RSA key B8FF1DA0D2FDCB2DA09C6C2C40A2FFF239263EDF # gpg: Good signature from "Song Gao <m17746591750@163.com>" [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: B8FF 1DA0 D2FD CB2D A09C 6C2C 40A2 FFF2 3926 3EDF * tag 'pull-loongarch-20230920' of https://gitlab.com/gaosong/qemu: (57 commits) target/loongarch: CPUCFG support LASX target/loongarch: Move simply DO_XX marcos togther target/loongarch: Implement xvld xvst target/loongarch: Implement xvshuf xvperm{i} xvshuf4i target/loongarch: Implement xvpack xvpick xvilv{l/h} target/loongarch: Implement xvreplve xvinsve0 xvpickve target/loongarch: Implement xvinsgr2vr xvpickve2gr target/loongarch: Implement xvbitsel xvset target/loongarch: Implement xvfcmp target/loongarch: Implement xvseq xvsle xvslt target/loongarch: Implement LASX fpu fcvt instructions target/loongarch: Implement LASX fpu arith instructions target/loongarch: Implement xvfrstp target/loongarch: Implement xvbitclr xvbitset xvbitrev target/loongarch: Implement xvpcnt target/loongarch: Implement xvclo xvclz target/loongarch: Implement xvssrlrn xvssrarn target/loongarch: Implement xvssrln xvssran target/loongarch: Implement xvsrlrn xvsrarn target/loongarch: Implement xvsrln xvsran ... Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-20target/loongarch: Add LASX data supportSong Gao
Signed-off-by: Song Gao <gaosong@loongson.cn> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230914022645.1151356-12-gaosong@loongson.cn>
2023-09-19linux-user/hppa: lock both words of function descriptorMikulas Patocka
The code in setup_rt_frame reads two words at haddr, but locks only one. This patch fixes it to lock both. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Acked-by: Helge Deller <deller@gmx.de> Cc: qemu-stable@nongnu.org Signed-off-by: Helge Deller <deller@gmx.de>
2023-09-19linux-user/hppa: clear the PSW 'N' bit when delivering signalsMikulas Patocka
qemu-hppa may crash when delivering a signal. It can be demonstrated with this program. Compile the program with "hppa-linux-gnu-gcc -O2 signal.c" and run it with "qemu-hppa -one-insn-per-tb a.out". It reports that the address of the flag is 0xb4 and it crashes when attempting to touch it. #include <stdio.h> #include <stdlib.h> #include <sys/time.h> #include <signal.h> sig_atomic_t flag; void sig(int n) { printf("&flag: %p\n", &flag); flag = 1; } int main(void) { struct sigaction sa; struct itimerval it; sa.sa_handler = sig; sigemptyset(&sa.sa_mask); sa.sa_flags = SA_RESTART; if (sigaction(SIGALRM, &sa, NULL)) perror("sigaction"), exit(1); it.it_interval.tv_sec = 0; it.it_interval.tv_usec = 100; it.it_value.tv_sec = it.it_interval.tv_sec; it.it_value.tv_usec = it.it_interval.tv_usec; if (setitimer(ITIMER_REAL, &it, NULL)) perror("setitimer"), exit(1); while (1) { } } The reason for the crash is that the signal handling routine doesn't clear the 'N' flag in the PSW. If the signal interrupts a thread when the 'N' flag is set, the flag remains set at the beginning of the signal handler and the first instruction of the signal handler is skipped. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Acked-by: Helge Deller <deller@gmx.de> Cc: qemu-stable@nongnu.org Signed-off-by: Helge Deller <deller@gmx.de>
2023-09-11linux-user/riscv: Add new extensions to hwprobeRobbin Ehn
This patch adds the new extensions in linux 6.5 to the hwprobe syscall. And fixes RVC check to OR with correct value. The previous variable contains 0 therefore it did work. Signed-off-by: Robbin Ehn <rehn@rivosinc.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <bc82203b72d7efb30f1b4a8f9eb3d94699799dc8.camel@rivosinc.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2023-09-11linux-user/riscv: Use abi type for target_ucontextLIU Zhiwei
We should not use types dependend on host arch for target_ucontext. This bug is found when run rv32 applications. Signed-off-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20230811055438.1945-1-zhiwei_liu@linux.alibaba.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2023-09-06Merge tag 'pull-lu-20230901' of https://gitlab.com/rth7680/qemu into stagingStefan Hajnoczi
linux-user: Rewrite and improve /proc/pid/maps linux-user: Fix shmdt and improve shm region tracking linux-user: Remove ELF_START_MMAP and image_info.start_mmap # -----BEGIN PGP SIGNATURE----- # # iQFRBAABCgA7FiEEekgeeIaLTbaoWgXAZN846K9+IV8FAmTyTEcdHHJpY2hhcmQu # aGVuZGVyc29uQGxpbmFyby5vcmcACgkQZN846K9+IV8aZAf/UVKDv0FwEzxn3wzx # pT+NbP4adHCew5ovDq94In9OpwG4+PtZj3x+EdPCFxAvVb9KdOs001a9zSRYSwWi # 0p9ZkOgtq58/Wr34dl6C8oPZP8bnw7hfVcXWYwdsBq9K+dmW9Tu4LgZSc92NWYiE # SGBATB/cF4keLlDJrm1YBfb6cVKmYHdgQzMHr4g4TitBOO3lic8HQglXN8eKvQyd # ZKuMxFwfSGjaNXsoBLmzPBEqJCLzj5JNtOb8maIN9oPTkkC66XvkBmD/4UrQ7K3x # aX2QgZpxZYZsyKfWJd4EkrJl+0JZYvGW4vBX1c+vBdIYQZoBHlWwZQBqsi+AMA6J # ASc3hQ== # =QWfr # -----END PGP SIGNATURE----- # gpg: Signature made Fri 01 Sep 2023 16:40:39 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-lu-20230901' of https://gitlab.com/rth7680/qemu: linux-user: Track shm regions with an interval tree linux-user: Fix shmdt linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat,shmdt} linux-user: Move shmat and shmdt implementations to mmap.c linux-user: Remove ELF_START_MMAP and image_info.start_mmap linux-user: Emulate the Anonymous: keyword in /proc/self/smaps linux-user: Show heap address in /proc/pid/maps linux-user: Adjust brk for load_bias linux-user: Use walk_memory_regions for open_self_maps util/selfmap: Use dev_t and ino_t in MapInfo linux-user: Emulate /proc/cpuinfo for Alpha linux-user: Emulate /proc/cpuinfo on aarch64 and arm linux-user: Split out cpu/target_proc.h Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-01linux-user: Track shm regions with an interval treeRichard Henderson
Remove the fixed size shm_regions[] array. Remove references when other mappings completely remove or replace a region. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Fix shmdtRichard Henderson
If the shm region is not mapped at shmaddr, EINVAL. Do not unmap the region until the syscall succeeds. Use mmap_reserve_or_unmap to preserve reserved_va semantics. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Use WITH_MMAP_LOCK_GUARD in target_{shmat,shmdt}Richard Henderson
Move the CF_PARALLEL setting outside of the mmap lock. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Move shmat and shmdt implementations to mmap.cRichard Henderson
Rename from do_* to target_*. Fix some minor checkpatch errors. Tested-by: Helge Deller <deller@gmx.de> Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Warner Losh <imp@bsdimp.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Remove ELF_START_MMAP and image_info.start_mmapRichard Henderson
The start_mmap value is write-only. Remove the field and the defines that populated it. Logically, this has been replaced by task_unmapped_base. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Emulate the Anonymous: keyword in /proc/self/smapsIlya Leoshkevich
Core dumps produced by gdb's gcore when connected to qemu's gdbstub lack stack. The reason is that gdb includes only anonymous memory in core dumps, which is distinguished by a non-0 Anonymous: value. Consider the mappings with PAGE_ANON fully anonymous, and the mappings without it fully non-anonymous. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> [rth: Update for open_self_maps_* rewrite] Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Show heap address in /proc/pid/mapsRichard Henderson
Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Adjust brk for load_biasRichard Henderson
PIE executables are usually linked at offset 0 and are relocated somewhere during load. The hiaddr needs to be adjusted to keep the brk next to the executable. Cc: qemu-stable@nongnu.org Fixes: 1f356e8c013 ("linux-user: Adjust initial brk when interpreter is close to executable") Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Use walk_memory_regions for open_self_mapsRichard Henderson
Replace the by-hand method of region identification with the official user-exec interface. Cross-check the region provided to the callback with the interval tree from read_self_maps(). Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01util/selfmap: Use dev_t and ino_t in MapInfoRichard Henderson
Use dev_t instead of a string, and ino_t instead of uint64_t. The latter is likely to be identical on modern systems but is more type-correct for usage. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Emulate /proc/cpuinfo for AlphaHelge Deller
Add emulation for /proc/cpuinfo for the alpha architecture. alpha output example: (alpha-chroot)root@p100:/# cat /proc/cpuinfo cpu : Alpha cpu model : ev67 cpu variation : 0 cpu revision : 0 cpu serial number : JA00000000 system type : QEMU system variation : QEMU_v8.0.92 system revision : 0 system serial number : AY00000000 cycle frequency [Hz] : 250000000 timer frequency [Hz] : 250.00 page size [bytes] : 8192 phys. address bits : 44 max. addr. space # : 255 BogoMIPS : 2500.00 platform string : AlphaServer QEMU user-mode VM cpus detected : 8 cpus active : 4 cpu active mask : 0000000000000095 L1 Icache : n/a L1 Dcache : n/a L2 cache : n/a L3 cache : n/a Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230803214450.647040-4-deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Emulate /proc/cpuinfo on aarch64 and armHelge Deller
Add emulation for /proc/cpuinfo for arm architecture. The output below mimics output as seen on debian porterboxes. aarch64 output example: processor : 0 model name : ARMv8 Processor rev 0 (v8l) BogoMIPS : 100.00 Features : swp half thumb fast_mult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae aes pmull sha1 sha2 crc32 CPU implementer : 0x41 CPU architecture: 8 CPU variant : 0x1 CPU part : 0xd07 CPU revision : 0 arm 32-bit output example: processor : 0 model name : ARMv7 Processor rev 5 (armv7l) BogoMIPS : 100.00 Features : swp half thumb fast_mult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0f CPU part : 0xc07 CPU revision : 5 Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230803214450.647040-3-deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-09-01linux-user: Split out cpu/target_proc.hRichard Henderson
Move the various open_cpuinfo functions into new files. Move the m68k open_hardware function as well. All other guest architectures get a boilerplate empty file. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-31accel/tcg: spelling fixesMichael Tokarev
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Message-ID: <20230823065335.1919380-18-mjt@tls.msk.ru> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-ID: <20230823065335.1919380-19-mjt@tls.msk.ru> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-08-23linux-user/elfload: Enable vxe2 on s390xIlya Leoshkevich
The vxe2 hwcap is not set for programs running in linux-user, but is set by a Linux kernel running in softmmu. Add it to the former. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20230804233748.218935-2-iii@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Claudio Fontana <cfontana@suse.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-08-09linux-user: Fix openat() emulation to correctly detect accesses to /procHelge Deller
In qemu we catch accesses to files like /proc/cpuinfo or /proc/net/route and return to the guest contents which would be visible on a real system (instead what the host would show). This patch fixes a bug, where for example the accesses cat /proc////cpuinfo or cd /proc && cat cpuinfo will not be recognized by qemu and where qemu will wrongly show the contents of the host's /proc/cpuinfo file. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20230803214450.647040-2-deller@gmx.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-09linux-user: Use ARRAY_SIZE with bitmask_transtblRichard Henderson
Rather than using a zero tuple to end the table, use a macro to apply ARRAY_SIZE and pass that on to the convert functions. This fixes two bugs in which the conversion functions required that both the target and host masks be non-zero in order to continue, rather than require both target and host masks be zero in order to terminate. This affected mmap_flags_tbl when the host does not support all of the flags we wish to convert (e.g. MAP_UNINITIALIZED). Mapping these flags to zero is good enough, and matches how the kernel ignores bits that are unknown. Fixes: 4b840f96 ("linux-user: Populate more bits in mmap_flags_tbl") Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-09linux-user: Split out do_mmapRichard Henderson
New function that rejects unsupported map types and flags. In 4b840f96 we should not have accepted MAP_SHARED_VALIDATE without actually validating the rest of the flags. Fixes: 4b840f96 ("linux-user: Populate more bits in mmap_flags_tbl") Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08Merge tag 'pull-lu-20230808' of https://gitlab.com/rth7680/qemu into stagingRichard Henderson
linux-user: Adjust guest image layout vs reserved_va linux-user: Do not adjust image mapping for host page size linux-user: Adjust initial brk when interpreter is close to executable util/selfmap: Rewrite using qemu/interval-tree.h linux-user: Rewrite probe_guest_base # -----BEGIN PGP SIGNATURE----- # # iQFRBAABCgA7FiEEekgeeIaLTbaoWgXAZN846K9+IV8FAmTSrp4dHHJpY2hhcmQu # aGVuZGVyc29uQGxpbmFyby5vcmcACgkQZN846K9+IV9lTQf/W/Tbd6CFnZpVE8Sb # BPrhdmo+x6Jftt1Ha66b/4xnasX7DuVaI1ECDh4CQQKIOh9A4LETx6ue9/UGi4vT # Fe4UrrJcAjt/CPaZhwXniJM9CvEnw1gkl3AgKAtZOBEConuPnkTiSWjySmCt3T4r # EGQxDe0HLpWYavNtvyywak/sEbwOD4hNAunFpJB6PLZ+KEoCDZwtcQdl55kg5bIt # WBMgUSXnWhC45t+26OcSDeHovqxHoA647H10T0y0U6bNVkW0tRW51xCTvHt+iDyR # s8UOCe1Q+w8F18fN68HIWBJ6NCzUts/AmQrWwc/MWiK1z91/ht5mlKAuNYnoZ6jH # htCSEA== # =ERAI # -----END PGP SIGNATURE----- # gpg: Signature made Tue 08 Aug 2023 02:07:42 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-lu-20230808' of https://gitlab.com/rth7680/qemu: linux-user: Rewrite non-fixed probe_guest_base linux-user: Rewrite fixed probe_guest_base linux-user: Consolidate guest bounds check in probe_guest_base linux-user: Remove duplicate CPU_LOG_PAGE from probe_guest_base util/selfmap: Rewrite using qemu/interval-tree.h linux-user: Use zero_bss for PT_LOAD with no file contents too linux-user: Do not adjust zero_bss for host page size linux-user: Do not adjust image mapping for host page size linux-user: Adjust initial brk when interpreter is close to executable linux-user: Use elf_et_dyn_base for ET_DYN with interpreter linux-user: Use MAP_FIXED_NOREPLACE for initial image mmap linux-user: Define ELF_ET_DYN_BASE in $guest/target_mman.h linux-user: Define TASK_UNMAPPED_BASE in $guest/target_mman.h linux-user: Adjust task_unmapped_base for reserved_va Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Rewrite non-fixed probe_guest_baseRichard Henderson
Use pgb_addr_set to probe for all of the guest addresses, not just the main executable. Handle the identity map specially and separately from the search. If /proc/self/maps is available, utilize the full power of the interval tree search, rather than a linear search through the address list. If /proc/self/maps is not available, increase the skip between probes so that we do not probe every single page of the host address space. Choose 1 MiB for 32-bit hosts (max 4k probes) and 1 GiB for 64-bit hosts (possibly a large number of probes, but the large step makes it more likely to find empty space quicker). Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Rewrite fixed probe_guest_baseRichard Henderson
Create a set of subroutines to collect a set of guest addresses, all of which must be mappable on the host. Use this within the renamed pgb_fixed subroutine to validate the user's choice of guest_base specified by the -B command-line option. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Consolidate guest bounds check in probe_guest_baseRichard Henderson
The three sets of checks are identical, logically. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Remove duplicate CPU_LOG_PAGE from probe_guest_baseRichard Henderson
The proper logging for probe_guest_base is in the main function. There is no need to duplicate that in the subroutines. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08util/selfmap: Rewrite using qemu/interval-tree.hRichard Henderson
We will want to be able to search the set of mappings. For this patch, the two users iterate the tree in order. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Use zero_bss for PT_LOAD with no file contents tooRichard Henderson
If p_filesz == 0, then vaddr_ef == vaddr. We can reuse the code in zero_bss rather than incompletely duplicating it in load_elf_image. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Do not adjust zero_bss for host page sizeRichard Henderson
Rely on target_mmap to handle guest vs host page size mismatch. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Do not adjust image mapping for host page sizeRichard Henderson
Remove TARGET_ELF_EXEC_PAGESIZE, and 3 other TARGET_ELF_PAGE* macros based off of that. Rely on target_mmap to handle guest vs host page size mismatch. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Adjust initial brk when interpreter is close to executableHelge Deller
While we attempt to load a ET_DYN executable far away from TASK_UNMAPPED_BASE, we are not completely in control of the address space layout. If the interpreter lands close to the executable, leaving insufficient heap space, move brk. Tested-by: Helge Deller <deller@gmx.de> Signed-off-by: Helge Deller <deller@gmx.de> [rth: Re-order after ELF_ET_DYN_BASE patch so that we do not "temporarily break" tsan, and also to minimize the changes required. Remove image_info.reserve_brk as unused.] Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Use elf_et_dyn_base for ET_DYN with interpreterRichard Henderson
Follow the lead of the linux kernel in fs/binfmt_elf.c, in which an ET_DYN executable which uses an interpreter (usually a PIE executable) is loaded away from where the interpreter itself will be loaded. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Use MAP_FIXED_NOREPLACE for initial image mmapRichard Henderson
Use this as extra protection for the guest mapping over any qemu host mappings. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Define ELF_ET_DYN_BASE in $guest/target_mman.hRichard Henderson
Copy each guest kernel's default value, then bound it against reserved_va or the host address space. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Define TASK_UNMAPPED_BASE in $guest/target_mman.hRichard Henderson
Provide default values that are as close as possible to the values used by the guest's kernel. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Adjust task_unmapped_base for reserved_vaRichard Henderson
Ensure that the chosen values for mmap_next_start and task_unmapped_base are within the guest address space. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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