From 8b7a87a03f7c15c7a1e1647c3527292604e80f6f Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Sat, 18 Jul 2020 17:47:43 -0700 Subject: xtensa: expose syscall through user_pt_regs Use one of the reserved slots in struct user_pt_regs to return syscall number in the GPR regset. Update syscall number from the GPR regset only when it's non-zero. Signed-off-by: Max Filippov --- arch/xtensa/kernel/ptrace.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/xtensa/kernel/ptrace.c') diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index 0278d7dfb4d6..437b4297948d 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -52,6 +52,7 @@ static int gpr_get(struct task_struct *target, .threadptr = regs->threadptr, .windowbase = regs->windowbase, .windowstart = regs->windowstart, + .syscall = regs->syscall, }; memcpy(newregs.a, @@ -91,6 +92,9 @@ static int gpr_set(struct task_struct *target, regs->sar = newregs.sar; regs->threadptr = newregs.threadptr; + if (newregs.syscall) + regs->syscall = newregs.syscall; + if (newregs.windowbase != regs->windowbase || newregs.windowstart != regs->windowstart) { u32 rotws, wmask; -- cgit v1.2.3