diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2025-07-20 14:21:19 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-08-21 21:09:20 +0300 |
| commit | 56101b69c9190667f473b9f93f8b6d8209aaa816 (patch) | |
| tree | 4804e46379770549703318f4f45d5bcfd39479b0 /include/linux/syscalls.h | |
| parent | 91440ff4cafad4c86322a612e523f7f021a493e7 (diff) | |
| download | linux-56101b69c9190667f473b9f93f8b6d8209aaa816.tar.xz | |
uprobes/x86: Add uprobe syscall to speed up uprobe
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
Diffstat (limited to 'include/linux/syscalls.h')
| -rw-r--r-- | include/linux/syscalls.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 77f45e5d4413..66c06fcdfe19 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -1005,6 +1005,8 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int on); asmlinkage long sys_uretprobe(void); +asmlinkage long sys_uprobe(void); + /* pciconfig: alpha, arm, arm64, ia64, sparc */ asmlinkage long sys_pciconfig_read(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, |