diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index b5112891b0..6de116eb90 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -340,6 +340,25 @@ _syscall3(int, sys_sched_getaffinity, pid_t, pid, unsigned int, len, #define __NR_sys_sched_setaffinity __NR_sched_setaffinity _syscall3(int, sys_sched_setaffinity, pid_t, pid, unsigned int, len, unsigned long *, user_mask_ptr); +/* sched_attr is not defined in glibc */ +struct sched_attr { + uint32_t size; + uint32_t sched_policy; + uint64_t sched_flags; + int32_t sched_nice; + uint32_t sched_priority; + uint64_t sched_runtime; + uint64_t sched_deadline; + uint64_t sched_period; + uint32_t sched_util_min; + uint32_t sched_util_max; +}; +#define __NR_sys_sched_getattr __NR_sched_getattr +_syscall4(int, sys_sched_getattr, pid_t, pid, struct sched_attr *, attr, + unsigned int, size, unsigned int, flags); +#define __NR_sys_sched_setattr __NR_sched_setattr +_syscall3(int, sys_sched_setattr, pid_t, pid, struct sched_attr *, attr, + unsigned int, flags); #define __NR_sys_getcpu __NR_getcpu _syscall3(int, sys_getcpu, unsigned *, cpu, unsigned *, node, void *, tcache); _syscall4(int, reboot, int, magic1, int, magic2, unsigned int, cmd, @@ -558,6 +577,24 @@ const char *target_strerror(int err) return strerror(target_to_host_errno(err)); } +static int check_zeroed_user(abi_long addr, size_t ksize, size_t usize) +{ + int i; + uint8_t b; + if (usize <= ksize) { + return 1; + } + for (i = ksize; i < usize; i++) { + if (get_user_u8(b, addr + i)) { + return -TARGET_EFAULT; + } + if (b != 0) { + return 0; + } + } + return 1; +} + #define safe_syscall0(type, name) \ static type safe_##name(void) \ { \ @@ -10801,6 +10838,92 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, } case TARGET_NR_sched_getscheduler: return get_errno(sched_getscheduler(arg1)); + case TARGET_NR_sched_getattr: + { + struct target_sched_attr *target_scha; + struct sched_attr scha; + if (arg2 == 0) { + return -TARGET_EINVAL; + } + if (arg3 > sizeof(scha)) { + arg3 = sizeof(scha); + } + ret = get_errno(sys_sched_getattr(arg1, &scha, arg3, arg4)); + if (!is_error(ret)) { + target_scha = lock_user(VERIFY_WRITE, arg2, arg3, 0); + if (!target_scha) { + return -TARGET_EFAULT; + } + target_scha->size = tswap32(scha.size); + target_scha->sched_policy = tswap32(scha.sched_policy); + target_scha->sched_flags = tswap64(scha.sched_flags); + target_scha->sched_nice = tswap32(scha.sched_nice); + target_scha->sched_priority = tswap32(scha.sched_priority); + target_scha->sched_runtime = tswap64(scha.sched_runtime); + target_scha->sched_deadline = tswap64(scha.sched_deadline); + target_scha->sched_period = tswap64(scha.sched_period); + if (scha.size > offsetof(struct sched_attr, sched_util_min)) { + target_scha->sched_util_min = tswap32(scha.sched_util_min); + target_scha->sched_util_max = tswap32(scha.sched_util_max); + } + unlock_user(target_scha, arg2, arg3); + } + return ret; + } + case TARGET_NR_sched_setattr: + { + struct target_sched_attr *target_scha; + struct sched_attr scha; + uint32_t size; + int zeroed; + if (arg2 == 0) { + return -TARGET_EINVAL; + } + if (get_user_u32(size, arg2)) { + return -TARGET_EFAULT; + } + if (!size) { + size = offsetof(struct target_sched_attr, sched_util_min); + } + if (size < offsetof(struct target_sched_attr, sched_util_min)) { + if (put_user_u32(sizeof(struct target_sched_attr), arg2)) { + return -TARGET_EFAULT; + } + return -TARGET_E2BIG; + } + + zeroed = check_zeroed_user(arg2, sizeof(struct target_sched_attr), size); + if (zeroed < 0) { + return zeroed; + } else if (zeroed == 0) { + if (put_user_u32(sizeof(struct target_sched_attr), arg2)) { + return -TARGET_EFAULT; + } + return -TARGET_E2BIG; + } + if (size > sizeof(struct target_sched_attr)) { + size = sizeof(struct target_sched_attr); + } + + target_scha = lock_user(VERIFY_READ, arg2, size, 1); + if (!target_scha) { + return -TARGET_EFAULT; + } + scha.size = size; + scha.sched_policy = tswap32(target_scha->sched_policy); + scha.sched_flags = tswap64(target_scha->sched_flags); + scha.sched_nice = tswap32(target_scha->sched_nice); + scha.sched_priority = tswap32(target_scha->sched_priority); + scha.sched_runtime = tswap64(target_scha->sched_runtime); + scha.sched_deadline = tswap64(target_scha->sched_deadline); + scha.sched_period = tswap64(target_scha->sched_period); + if (size > offsetof(struct target_sched_attr, sched_util_min)) { + scha.sched_util_min = tswap32(target_scha->sched_util_min); + scha.sched_util_max = tswap32(target_scha->sched_util_max); + } + unlock_user(target_scha, arg2, 0); + return get_errno(sys_sched_setattr(arg1, &scha, arg3)); + } case TARGET_NR_sched_yield: return get_errno(sched_yield()); case TARGET_NR_sched_get_priority_max: |