56101b69c9
Adding new uprobe syscall that calls uprobe handlers for given 'breakpoint' address. The idea is that the 'breakpoint' address calls the user space trampoline which executes the uprobe syscall. The syscall handler reads the return address of the initial call to retrieve the original 'breakpoint' address. With this address we find the related uprobe object and call its consumers. Adding the arch_uprobe_trampoline_mapping function that provides uprobe trampoline mapping. This mapping is backed with one global page initialized at __init time and shared by the all the mapping instances. We do not allow to execute uprobe syscall if the caller is not from uprobe trampoline mapping. The uprobe syscall ensures the consumer (bpf program) sees registers values in the state before the trampoline was called. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Link: https://lore.kernel.org/r/20250720112133.244369-10-jolsa@kernel.org |
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| Makefile | ||
| syscall_32.tbl | ||
| syscall_64.tbl | ||