On Thu, 20 May 2021 21:19:30 +1000, Nicholas Piggin wrote:
The sc and scv 0 system calls have different ABI conventions, and
ptracers need to know which system call type is being used if it wants
to look at the syscall registers.
Document that pt_regs.trap can be used for this, and fix one in-tree user
to work with scv 0 syscalls.
Applied to powerpc/fixes.
[1/2] powerpc/64s/syscall: Use pt_regs.trap to distinguish syscall ABI difference between sc and scv syscalls
https://git.kernel.org/powerpc/c/5665bc35c1ed917ac8fd06cb651317bb47a65b10
[2/2] powerpc/64s/syscall: Fix ptrace syscall info with scv syscalls
https://git.kernel.org/powerpc/c/d72500f992849d31ebae8f821a023660ddd0dcc2
cheers