qemu/bsd-user, branch master

bsd-user: Handle short reads in mmap_h_gt_g

2024-08-20T23:10:42Z

In particular, if an image has a large bss, we can hit EOF before reading all bytes of the mapping. Mirror the similar change to linux-user. Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20240820050848.165253-3-richard.henderson@linaro.org>

bsd-user: Add target.h for aarch64.

2024-07-24T22:02:07Z

For aarch64, it's a 64-bit API, so there's no pairing of registers for 64-bit values. Signed-off-by: Warner Losh

bsd-user: Define TARGET_SIGSTACK_ALIGN and use it to round stack

2024-07-23T16:56:30Z

Most (all?) targets require stacks to be properly aligned. Rather than a series of ifdefs in bsd-user/signal.h, instead use a manditory #define for all architectures. Signed-off-by: Warner Losh Reviewed-by: Richard Henderson

bsd-user: Sync fork_start/fork_end with linux-user

2024-07-23T16:56:25Z

This reorders some of the calls, deduplicates code between branches and, most importantly, fixes a double end_exclusive call in the parent that will cause exclusive_context_count to go negative. Signed-off-by: Jessica Clarke Pull-Request: https://github.com/qemu-bsd-user/qemu-bsd-user/pull/52 Reviewed-by: Warner Losh Signed-off-by: Warner Losh Reviewed-by: Richard Henderson

bsd-user: Simplify the implementation of execve

2024-07-23T16:50:54Z

This removes the logic which prepends the emulator to each call to execve and fexecve. This is not necessary with the existing imgact_binmisc support and it avoids the need to install the emulator binary into jail environments when using 'binmiscctl --pre-open'. Signed-off-by: Doug Rabson Reviewed-by: Warner Losh Signed-off-by: Warner Losh Acked-by: Richard Henderson

bsd-user:Add AArch64 improvements and signal handling functions

2024-07-23T16:50:54Z

Added get_ucontext_sigreturn function to check processor state ensuring current execution mode is EL0 and no flags indicating interrupts or exceptions are set. Updated AArch64 code to use CF directly without reading/writing the entire processor state, improving efficiency. Changed FP data structures to use Int128 instead of __uint128_t, leveraging QEMU's generic mechanism for referencing this type. Signed-off-by: Stacey Son Signed-off-by: Ajeet Singh Signed-off-by: Warner Losh Reviewed-by: Richard Henderson Message-Id: <20240707191128.10509-9-itachis@FreeBSD.org> Signed-off-by: Warner Losh

bsd-user:Add set_mcontext function for ARM AArch64

2024-07-23T16:50:54Z

The function copies register values from the provided target_mcontext_t structure to the CPUARMState registers. Note:FP is unfinished upstream but will be a separate commit coming soon. Signed-off-by: Stacey Son Signed-off-by: Ajeet Singh Reviewed-by: Richard Henderson Message-Id: <20240707191128.10509-8-itachis@FreeBSD.org> Signed-off-by: Warner Losh

bsd-user:Add setup_sigframe_arch function for ARM AArch64

2024-07-23T16:50:54Z

The function utilizes the `get_mcontext` function to retrieve the machine context for the current CPUARMState Signed-off-by: Warner Losh Signed-off-by: Ajeet Singh Reviewed-by: Richard Henderson Message-Id: <20240707191128.10509-7-itachis@FreeBSD.org> Signed-off-by: Warner Losh

bsd-user:Add get_mcontext function for ARM AArch64

2024-07-23T16:50:54Z

function to retrieve machine context,it populates the provided target_mcontext_t structure with information from the CPUARMState registers. Signed-off-by: Stacey Son Signed-off-by: Ajeet Singh Co-authored-by: Kyle Evans Reviewed-by: Richard Henderson Message-Id: <20240707191128.10509-6-itachis@FreeBSD.org> Signed-off-by: Warner Losh

bsd-user:Add ARM AArch64 signal handling support

2024-07-23T16:50:54Z

Added sigcode setup function for signal trampoline which initializes a sequence of instructions to handle signal returns and exits, copying this code to the target offset. Defined ARM AArch64 specific signal definitions including register indices and sizes, and introduced structures to represent general purpose registers, floating point registers, and machine context. Added function to set up signal handler arguments, populating register values in `CPUARMState` based on the provided signal, signal frame, signal action, and frame address. Signed-off-by: Stacey Son Signed-off-by: Ajeet Singh Signed-off-by: Warner Losh Co-authored-by: Warner Losh Reviewed-by: Richard Henderson Message-Id: <20240707191128.10509-5-itachis@FreeBSD.org> Signed-off-by: Warner Losh