diff options
| -rw-r--r-- | bsd-user/freebsd/os-sys.c | 56 | ||||
| -rw-r--r-- | bsd-user/freebsd/os-syscall.c | 4 | ||||
| -rw-r--r-- | bsd-user/qemu.h | 2 |
3 files changed, 61 insertions, 1 deletions
diff --git a/bsd-user/freebsd/os-sys.c b/bsd-user/freebsd/os-sys.c index 6c9c2f8fd0..646b8e3f74 100644 --- a/bsd-user/freebsd/os-sys.c +++ b/bsd-user/freebsd/os-sys.c @@ -248,7 +248,7 @@ static inline void sysctl_oidfmt(uint32_t *holdp) holdp[0] = tswap32(holdp[0]); } -static abi_long G_GNUC_UNUSED do_freebsd_sysctl_oid(CPUArchState *env, int32_t *snamep, +static abi_long do_freebsd_sysctl_oid(CPUArchState *env, int32_t *snamep, int32_t namelen, void *holdp, size_t *holdlenp, void *hnewp, size_t newlen) { @@ -471,6 +471,60 @@ out: return ret; } +abi_long do_freebsd_sysctl(CPUArchState *env, abi_ulong namep, int32_t namelen, + abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen) +{ + abi_long ret = -TARGET_EFAULT; + void *hnamep, *holdp = NULL, *hnewp = NULL; + size_t holdlen; + abi_ulong oldlen = 0; + int32_t *snamep = g_malloc(sizeof(int32_t) * namelen), *p, *q, i; + + /* oldlenp is read/write, pre-check here for write */ + if (oldlenp) { + if (!access_ok(VERIFY_WRITE, oldlenp, sizeof(abi_ulong)) || + get_user_ual(oldlen, oldlenp)) { + goto out; + } + } + hnamep = lock_user(VERIFY_READ, namep, namelen, 1); + if (hnamep == NULL) { + goto out; + } + if (newp) { + hnewp = lock_user(VERIFY_READ, newp, newlen, 1); + if (hnewp == NULL) { + goto out; + } + } + if (oldp) { + holdp = lock_user(VERIFY_WRITE, oldp, oldlen, 0); + if (holdp == NULL) { + goto out; + } + } + holdlen = oldlen; + for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++, q++) { + *q = tswap32(*p); + } + + ret = do_freebsd_sysctl_oid(env, snamep, namelen, holdp, &holdlen, hnewp, + newlen); + + /* + * writeability pre-checked above. __sysctl(2) returns ENOMEM and updates + * oldlenp for the proper size to use. + */ + if (oldlenp && (ret == 0 || ret == -TARGET_ENOMEM)) { + put_user_ual(holdlen, oldlenp); + } + unlock_user(hnamep, namep, 0); + unlock_user(holdp, oldp, ret == 0 ? holdlen : 0); +out: + g_free(snamep); + return ret; +} + /* sysarch() is architecture dependent. */ abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2) { diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c index e00997a818..20ab3d4d9a 100644 --- a/bsd-user/freebsd/os-syscall.c +++ b/bsd-user/freebsd/os-syscall.c @@ -494,6 +494,10 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1, /* * sys{ctl, arch, call} */ + case TARGET_FREEBSD_NR___sysctl: /* sysctl(3) */ + ret = do_freebsd_sysctl(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6); + break; + case TARGET_FREEBSD_NR_sysarch: /* sysarch(2) */ ret = do_freebsd_sysarch(cpu_env, arg1, arg2); break; diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h index 4e7b8b1c06..208772d4ed 100644 --- a/bsd-user/qemu.h +++ b/bsd-user/qemu.h @@ -253,6 +253,8 @@ bool is_error(abi_long ret); int host_to_target_errno(int err); /* os-sys.c */ +abi_long do_freebsd_sysctl(CPUArchState *env, abi_ulong namep, int32_t namelen, + abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen); abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2); /* user access */ |