From: Peter Maydell Date: Thu, 10 Jul 2025 11:31:23 +0000 (+0100) Subject: linux-user: Implement fchmodat2 syscall X-Git-Tag: v10.1.0-rc0~24^2~7 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6a3e132a1be8c9e649967a4eb341d00731be7f51;p=thirdparty%2Fqemu.git linux-user: Implement fchmodat2 syscall The fchmodat2 syscall is new from Linux 6.6; it is like the existing fchmodat syscall except that it takes a flags parameter. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/3019 Signed-off-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Signed-off-by: Richard Henderson Message-ID: <20250710113123.1109461-1-peter.maydell@linaro.org> --- diff --git a/linux-user/syscall.c b/linux-user/syscall.c index fc37028597..e1b1476936 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -790,6 +790,10 @@ safe_syscall6(ssize_t, copy_file_range, int, infd, loff_t *, pinoff, int, outfd, loff_t *, poutoff, size_t, length, unsigned int, flags) #endif +#if defined(TARGET_NR_fchmodat2) && defined(__NR_fchmodat2) +safe_syscall4(int, fchmodat2, int, dfd, const char *, filename, + unsigned short, mode, unsigned int, flags) +#endif /* We do ioctl like this rather than via safe_syscall3 to preserve the * "third argument might be integer or pointer or not present" behaviour of @@ -10713,6 +10717,15 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1, ret = get_errno(fchmodat(arg1, p, arg3, 0)); unlock_user(p, arg2, 0); return ret; +#endif +#if defined(TARGET_NR_fchmodat2) && defined(__NR_fchmodat2) + case TARGET_NR_fchmodat2: + if (!(p = lock_user_string(arg2))) { + return -TARGET_EFAULT; + } + ret = get_errno(safe_fchmodat2(arg1, p, arg3, arg4)); + unlock_user(p, arg2, 0); + return ret; #endif case TARGET_NR_getpriority: /* Note that negative values are valid for getpriority, so we must