From: Richard Henderson Date: Sat, 2 Mar 2024 00:52:30 +0000 (-1000) Subject: linux-user: Implement PR_{GET,SET}_CHILD_SUBREAPER X-Git-Tag: v9.0.0-rc0~12^2~6 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=07726f522deea2b98f39f7acdd32c60a35d65d1a;p=thirdparty%2Fqemu.git linux-user: Implement PR_{GET,SET}_CHILD_SUBREAPER The "set" prctl passes through integral values. The "get" prctl returns the value into a pointer. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1929 Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 597bdf0c2d4..0801ae124d6 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6450,11 +6450,21 @@ static abi_long do_prctl(CPUArchState *env, abi_long option, abi_long arg2, case PR_SET_NO_NEW_PRIVS: case PR_GET_IO_FLUSHER: case PR_SET_IO_FLUSHER: + case PR_SET_CHILD_SUBREAPER: /* Some prctl options have no pointer arguments and we can pass on. */ return get_errno(prctl(option, arg2, arg3, arg4, arg5)); case PR_GET_CHILD_SUBREAPER: - case PR_SET_CHILD_SUBREAPER: + { + int val; + ret = get_errno(prctl(PR_GET_CHILD_SUBREAPER, &val, + arg3, arg4, arg5)); + if (!is_error(ret) && put_user_s32(val, arg2)) { + return -TARGET_EFAULT; + } + return ret; + } + case PR_GET_SPECULATION_CTRL: case PR_SET_SPECULATION_CTRL: case PR_GET_TID_ADDRESS: