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Sun, 17 Sep 2023 14:39:43 -0700 (PDT) From: Karim Taha To: qemu-devel@nongnu.org Cc: imp@bsdimp.com, Richard Henderson , Stacey Son , Karim Taha Subject: [PATCH v2 14/28] bsd-user: Implement getrlimit(2) and setrlimit(2) Date: Mon, 18 Sep 2023 00:37:49 +0300 Message-ID: <20230917213803.20683-15-kariem.taha2.7@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230917213803.20683-1-kariem.taha2.7@gmail.com> References: <20230917213803.20683-1-kariem.taha2.7@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::329; envelope-from=kariem.taha2.7@gmail.com; helo=mail-wm1-x329.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Stacey Son Signed-off-by: Stacey Son Signed-off-by: Karim Taha Reviewed-by: Richard Henderson Reviewed-by: Warner Losh --- bsd-user/bsd-proc.h | 59 +++++++++++++++++++++++++++++++++++ bsd-user/freebsd/os-syscall.c | 8 +++++ 2 files changed, 67 insertions(+) diff --git a/bsd-user/bsd-proc.h b/bsd-user/bsd-proc.h index 57fea173c2..06b5b9e03c 100644 --- a/bsd-user/bsd-proc.h +++ b/bsd-user/bsd-proc.h @@ -137,4 +137,63 @@ static inline abi_long do_bsd_getrusage(abi_long who, abi_ulong target_addr) return ret; } +/* getrlimit(2) */ +static inline abi_long do_bsd_getrlimit(abi_long arg1, abi_ulong arg2) +{ + abi_long ret; + int resource = target_to_host_resource(arg1); + struct target_rlimit *target_rlim; + struct rlimit rlim; + + switch (resource) { + case RLIMIT_STACK: + rlim.rlim_cur = target_dflssiz; + rlim.rlim_max = target_maxssiz; + ret = 0; + break; + + case RLIMIT_DATA: + rlim.rlim_cur = target_dfldsiz; + rlim.rlim_max = target_maxdsiz; + ret = 0; + break; + + default: + ret = get_errno(getrlimit(resource, &rlim)); + break; + } + if (!is_error(ret)) { + if (!lock_user_struct(VERIFY_WRITE, target_rlim, arg2, 0)) { + return -TARGET_EFAULT; + } + target_rlim->rlim_cur = host_to_target_rlim(rlim.rlim_cur); + target_rlim->rlim_max = host_to_target_rlim(rlim.rlim_max); + unlock_user_struct(target_rlim, arg2, 1); + } + return ret; +} + +/* setrlimit(2) */ +static inline abi_long do_bsd_setrlimit(abi_long arg1, abi_ulong arg2) +{ + abi_long ret; + int resource = target_to_host_resource(arg1); + struct target_rlimit *target_rlim; + struct rlimit rlim; + + if (RLIMIT_STACK == resource) { + /* XXX We should, maybe, allow the stack size to shrink */ + ret = -TARGET_EPERM; + } else { + if (!lock_user_struct(VERIFY_READ, target_rlim, arg2, 1)) { + return -TARGET_EFAULT; + } + rlim.rlim_cur = target_to_host_rlim(target_rlim->rlim_cur); + rlim.rlim_max = target_to_host_rlim(target_rlim->rlim_max); + unlock_user_struct(target_rlim, arg2, 0); + ret = get_errno(setrlimit(resource, &rlim)); + } + return ret; +} + #endif /* !BSD_PROC_H_ */ diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c index 5d8693ed55..5cb6086230 100644 --- a/bsd-user/freebsd/os-syscall.c +++ b/bsd-user/freebsd/os-syscall.c @@ -247,6 +247,14 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1, ret = do_bsd_getrusage(arg1, arg2); break; + case TARGET_FREEBSD_NR_getrlimit: /* getrlimit(2) */ + ret = do_bsd_getrlimit(arg1, arg2); + break; + + case TARGET_FREEBSD_NR_setrlimit: /* setrlimit(2) */ + ret = do_bsd_setrlimit(arg1, arg2); + break; + /* * File system calls.