Change Details

Export argc, argv, envc, envv, and ps_strings in auxargs. This simplifies discovery of these values, potentially with reducing the number of syscalls we need to make at runtime. Longer term, we wish to convert the startup process to pass an auxargs pointer to _start() and use that rather than walking off the end of envv. This is cleaner, more C-friendly, and for systems with strong bounds (e.g. CHERI) necessary. --- Add procstat support for new AT_ flags. This includes argc, argv, envc, envv, and ps_strings. --- Support AT_PS_STRINGS in _elf_aux_info(). This will be used by setproctitle(). --- Attempt to use AT_PS_STRINGS to get the ps_strings pointer. This saves a system call and avoids one of the (relatively rare) cases of the kernel exporting pointers via sysctl. As a temporary measure, keep the sysctl support to allow limited compatability with old kernels. Fail gracefully if ps_strings can't be found (should never happen).

Make ps_strings in struct image_params into a pointer. --- Export argc, argv, envc, envv, and ps_strings in auxargs. This simplifies discovery of these values, potentially with reducing the number of syscalls we need to make at runtime. Longer term, we wish to convert the startup process to pass an auxargs pointer to _start() and use that rather than walking off the end of envv. This is cleaner, more C-friendly, and for systems with strong bounds (e.g. CHERI) necessary. --- Add procstat support for new AT_ flags. This includes argc, argv, envc, envv, and ps_strings. --- Support AT_PS_STRINGS in _elf_aux_info(). This will be used by setproctitle(). --- Attempt to use AT_PS_STRINGS to get the ps_strings pointer. This saves a system call and avoids one of the (relatively rare) cases of the kernel exporting pointers via sysctl. As a temporary measure, keep the sysctl support to allow limited compatability with old kernels. Fail gracefully if ps_strings can't be found (should never happen).

Make ps_strings in struct image_params into a pointer. --- Export argc, argv, envc, envv, and ps_strings in auxargs. This simplifies discovery of these values, potentially with reducing the number of syscalls we need to make at runtime. Longer term, we wish to convert the startup process to pass an auxargs pointer to _start() and use that rather than walking off the end of envv. This is cleaner, more C-friendly, and for systems with strong bounds (e.g. CHERI) necessary. --- Add procstat support for new AT_ flags. This includes argc, argv, envc, envv, and ps_strings. --- Support AT_PS_STRINGS in _elf_aux_info(). This will be used by setproctitle(). --- Attempt to use AT_PS_STRINGS to get the ps_strings pointer. This saves a system call and avoids one of the (relatively rare) cases of the kernel exporting pointers via sysctl. As a temporary measure, keep the sysctl support to allow limited compatability with old kernels. Fail gracefully if ps_strings can't be found (should never happen).