QEMU main repository https://git.landau.one/pub/scm/virt/qemu/qemu.git/atom?h=master 2026-03-05T18:54:09+00:00 2026-03-05T18:54:09+00:00 Florian Hofhammer florian.hofhammer@epfl.ch 2026-03-05T10:06:01+00:00 urn:sha1:9097087147cfc6b3f6412a67e07fd1f63a1ee325 The syscall emulation code previously wasn't interruptible via cpu_loop_exit(), as this construct relies on a longjmp target that is not live anymore in the syscall handling code. Consequently, longjmp() would operate on a (potentially overwritten) stale jump buffer. This patch adds an additional setjmp and the necessary handling around it to make longjmp() (and by proxy cpu_loop_exit() safe to call even within a syscall context. Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Florian Hofhammer <florian.hofhammer@epfl.ch> Link: https://lore.kernel.org/qemu-devel/20260305-setpc-v5-v7-3-4c3adba52403@epfl.ch Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> 2025-10-16T15:07:52+00:00 Philippe Mathieu-Daudé philmd@linaro.org 2025-10-06T15:36:31+00:00 urn:sha1:91fc6d8101de97c588e0a4263cf4f6148b3e702a MicroBlaze CPU model has a "little-endian" property, pointing to the @endi internal field. Commit c36ec3a9655 ("hw/microblaze: Explicit CPU endianness") took care of having all MicroBlaze boards with an explicit default endianness, so later commit 415aae543ed ("target/microblaze: Consider endianness while translating code") could infer the endianness at runtime from the @endi field, and not a compile time via the TARGET_BIG_ENDIAN definition. Doing so, we forgot to make the endianness explicit on user emulation, so there all CPUs are started with the default "little-endian=off" value, leading to breaking support for little endian binaries: $ readelf -h ./hello-world-mbel ELF Header: Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 Class: ELF32 Data: 2's complement, little endian $ qemu-microblazeel ./hello-world-mbel qemu: uncaught target signal 11 (Segmentation fault) - core dumped Segmentation fault (core dumped) Fix by restoring the previous behavior of starting with the builtin endianness of the binary: $ qemu-microblazeel ./hello-world-mbel Hello World Cc: qemu-stable@nongnu.org Fixes: 415aae543ed ("target/microblaze: Consider endianness while translating code") Reported-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com> Message-Id: <20251006173350.17455-1-philmd@linaro.org> 2025-09-17T17:00:56+00:00 Paolo Bonzini pbonzini@redhat.com 2025-08-29T14:53:05+00:00 urn:sha1:758e5de501f78d4ef53a43e0c5a4783cd807b5be Add a user-mode emulation version of the function. More will be added later, for now it is just process_queued_cpu_work. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 2025-08-29T21:04:04+00:00 Richard Henderson richard.henderson@linaro.org 2025-07-29T21:26:43+00:00 urn:sha1:eb727cc45a352ff259c4c2d85456f0412e738d43 Rename to elf_check_machine to match ELF_MACHINE. Remove the unnecessary definition for loongarch64. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2025-08-29T21:04:04+00:00 Richard Henderson richard.henderson@linaro.org 2025-07-29T21:23:31+00:00 urn:sha1:e6b7635c9a33918c671e1f2ef4b17b5c2f279d66 PowerPC was the one outlier that defined both ELF_ARCH and ELF_MACHINE; ELF_ARCH was defined incorrectly, necessitating the definition of elf_check_arch. However, the elf file header field in question is called e_machine, so ELF_MACHINE is in fact the better name. Mechanically change most target/target_elf.h files, then adjust ppc/target_elf.h manually. Do not provide a default for ELF_MACHINE. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2025-08-29T21:04:04+00:00 Richard Henderson richard.henderson@linaro.org 2025-07-29T20:38:04+00:00 urn:sha1:db325955c715c4e4237b370cb65c03ca3414e60d Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2025-08-29T21:04:04+00:00 Richard Henderson richard.henderson@linaro.org 2025-08-28T01:55:27+00:00 urn:sha1:e803a48c1ac72ed47b6490e3d7cf6b0cc7372e85 Make use of the fact that target_elf_gregset_t is a proper structure. Drop ELF_NREG, target_elf_greg_t, and tswapreg. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2025-08-29T21:04:04+00:00 Richard Henderson richard.henderson@linaro.org 2025-08-28T05:28:11+00:00 urn:sha1:e5c31ef558da16fb9cbb9e3a3c7247b60fdfd05b Separately enumerating all 32 registers is not helpful. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2025-08-29T21:04:04+00:00 Richard Henderson richard.henderson@linaro.org 2025-08-28T05:22:14+00:00 urn:sha1:cf33264f19b566cda4b50ccfec9e87734b08971f Move the target_pt_regs structure from target_syscall.h. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> 2025-08-29T21:04:03+00:00 Richard Henderson richard.henderson@linaro.org 2025-07-29T16:06:03+00:00 urn:sha1:e06b9c34eaa388e0503426c7831a2db977a472fd Move elf_core_copy_regs to elfload.c. Move HAVE_ELF_CORE_DUMP, ELF_NREGS, target_elf_gregset_t to target_elf.h. For now, duplicate the definitions of target_elf_greg_t and tswapreg. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>