qemu/linux-user, branch master

linux-user: Handle short reads in mmap_h_gt_g

2024-08-20T23:09:46Z

In particular, if an image has a large bss, we can hit EOF before reading all host_len bytes of the mapping. Create a helper, mmap_pread to handle the job for both the larger block in mmap_h_gt_g itself, as well as the smaller block in mmap_frag. Cc: qemu-stable@nongnu.org Fixes: eb5027ac618 ("linux-user: Split out mmap_h_gt_g") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2504 Signed-off-by: Richard Henderson Message-Id: <20240820050848.165253-2-richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé

linux-user/mips: Select Loongson CPU for Loongson binaries

2024-08-19T22:49:13Z

Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20240814133928.6746-5-philmd@linaro.org>

linux-user/mips: Select MIPS64R2-generic for Rel2 binaries

2024-08-19T22:49:13Z

Cc: YunQiang Su Reported-by: Jiaxun Yang Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20240814133928.6746-4-philmd@linaro.org>

linux-user/mips: Select Octeon68XX CPU for Octeon binaries

2024-08-19T22:49:05Z

The Octeon68XX CPU is available since commit 9a6046a655 ("target/mips: introduce Cavium Octeon CPU model"). Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1722 Reported-by: Johnathan Hữu Trí Suggested-by: Richard Henderson Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20240814133928.6746-3-philmd@linaro.org>

linux-user/mips: Do not try to use removed R5900 CPU

2024-08-19T22:47:57Z

R5900 emulation was removed in commit 823f2897bd. Remove it from ELF parsing in order to avoid: $ qemu-mipsn32 ./test5900 qemu-mipsn32: unable to find CPU model 'R5900' This reverts commit 4d9e5a0eb7df6e98ac6cf5e16029f35dd05b9537. Fixes: 823f2897bd ("target/mips: Disable R5900 support") Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20240814133928.6746-2-philmd@linaro.org>

linux-user: Preserve NULL hit in target_mmap subroutines

2024-08-15T01:03:47Z

Do not pass guest_base to the host mmap instead of zero hint. Cc: qemu-stable@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2353 Signed-off-by: Richard Henderson

linux-user/elfload: Fix pr_pid values in core files

2024-08-04T22:05:44Z

Analyzing qemu-produced core dumps of multi-threaded apps runs into: (gdb) info threads [...] 21 Thread 0x3ff83cc0740 (LWP 9295) warning: Couldn't find general-purpose registers in core file. in ?? () The reason is that all pr_pid values are the same, because the same TaskState is used for all CPUs when generating NT_PRSTATUS notes. Fix by using TaskStates associated with individual CPUs. Cc: qemu-stable@nongnu.org Fixes: 243c47066253 ("linux-user/elfload: Write corefile elf header in one block") Signed-off-by: Ilya Leoshkevich Reviewed-by: Richard Henderson Message-ID: <20240801202340.21845-1-iii@linux.ibm.com> Signed-off-by: Richard Henderson

linux-user: open_self_stat: Implement num_threads

2024-07-29T21:59:23Z

The num_threads field reports the total number of threads in the process. In QEMU, this is equal to the number of CPU instances. Signed-off-by: Fabio D'Urso Reviewed-by: Alex Bennée Message-ID: <20240619194109.248066-1-fdurso@google.com> Signed-off-by: Richard Henderson

linux-user/main: Check errno when getting AT_EXECFD

2024-07-29T21:59:23Z

It's possible for AT_EXECFD to end up with a valid value of 0. Check errno when using qemu_getauxval instead of return value to handle this case. Not handling this case leads to a confusing condition where the executable ends up as fd 0, i.e. stdin. Signed-off-by: Vivian Wang Reviewed-by: Richard Henderson Fixes: 0b959cf5e4cc ("linux-user: Use qemu_getauxval for AT_EXECFD") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2448 Message-ID: <20240723100545.405476-3-uwu@dram.page> Signed-off-by: Richard Henderson

target/arm: Factor out code for setting MTE TCF0 field

2024-07-05T11:35:14Z

Factor out the code used for setting the MTE TCF0 field from the prctl code into a convenient function. Other subsystems, like gdbstub, need to set this field as well, so keep it as a separate function to avoid duplication and ensure consistency in how this field is set across the board. Signed-off-by: Gustavo Romero Message-Id: <20240628050850.536447-7-gustavo.romero@linaro.org> [AJB: clean-up includes, move MTE defines] Reviewed-by: Manos Pitsidianakis Signed-off-by: Alex Bennée Message-Id: <20240705084047.857176-36-alex.bennee@linaro.org>