diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 153 |
1 files changed, 125 insertions, 28 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index fed7a8fe0f..1dd7aad43c 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -559,12 +559,38 @@ _syscall6(int, sys_pselect6, int, nfds, fd_set *, readfds, fd_set *, writefds, fd_set *, exceptfds, struct timespec *, timeout, void *, sig); #endif +#if defined(TARGET_NR_prlimit64) +#ifndef __NR_prlimit64 +# define __NR_prlimit64 -1 +#endif +#define __NR_sys_prlimit64 __NR_prlimit64 +/* The glibc rlimit structure may not be that used by the underlying syscall */ +struct host_rlimit64 { + uint64_t rlim_cur; + uint64_t rlim_max; +}; +_syscall4(int, sys_prlimit64, pid_t, pid, int, resource, + const struct host_rlimit64 *, new_limit, + struct host_rlimit64 *, old_limit) +#endif + extern int personality(int); extern int flock(int, int); extern int setfsuid(int); extern int setfsgid(int); extern int setgroups(int, gid_t *); +/* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */ +#ifdef TARGET_ARM +static inline int regpairs_aligned(void *cpu_env) { + return ((((CPUARMState *)cpu_env)->eabi) == 1) ; +} +#elif defined(TARGET_MIPS) +static inline int regpairs_aligned(void *cpu_env) { return 1; } +#else +static inline int regpairs_aligned(void *cpu_env) { return 0; } +#endif + #define ERRNO_TABLE_SIZE 1200 /* target_to_host_errno_table[] is initialized from @@ -919,18 +945,68 @@ static inline abi_long host_to_target_rusage(abi_ulong target_addr, static inline rlim_t target_to_host_rlim(target_ulong target_rlim) { - if (target_rlim == TARGET_RLIM_INFINITY) - return RLIM_INFINITY; + target_ulong target_rlim_swap; + rlim_t result; + + target_rlim_swap = tswapl(target_rlim); + if (target_rlim_swap == TARGET_RLIM_INFINITY || target_rlim_swap != (rlim_t)target_rlim_swap) + result = RLIM_INFINITY; else - return tswapl(target_rlim); + result = target_rlim_swap; + + return result; } static inline target_ulong host_to_target_rlim(rlim_t rlim) { + target_ulong target_rlim_swap; + target_ulong result; + if (rlim == RLIM_INFINITY || rlim != (target_long)rlim) - return TARGET_RLIM_INFINITY; + target_rlim_swap = TARGET_RLIM_INFINITY; else - return tswapl(rlim); + target_rlim_swap = rlim; + result = tswapl(target_rlim_swap); + + return result; +} + +static inline int target_to_host_resource(int code) +{ + switch (code) { + case TARGET_RLIMIT_AS: + return RLIMIT_AS; + case TARGET_RLIMIT_CORE: + return RLIMIT_CORE; + case TARGET_RLIMIT_CPU: + return RLIMIT_CPU; + case TARGET_RLIMIT_DATA: + return RLIMIT_DATA; + case TARGET_RLIMIT_FSIZE: + return RLIMIT_FSIZE; + case TARGET_RLIMIT_LOCKS: + return RLIMIT_LOCKS; + case TARGET_RLIMIT_MEMLOCK: + return RLIMIT_MEMLOCK; + case TARGET_RLIMIT_MSGQUEUE: + return RLIMIT_MSGQUEUE; + case TARGET_RLIMIT_NICE: + return RLIMIT_NICE; + case TARGET_RLIMIT_NOFILE: + return RLIMIT_NOFILE; + case TARGET_RLIMIT_NPROC: + return RLIMIT_NPROC; + case TARGET_RLIMIT_RSS: + return RLIMIT_RSS; + case TARGET_RLIMIT_RTPRIO: + return RLIMIT_RTPRIO; + case TARGET_RLIMIT_SIGPENDING: + return RLIMIT_SIGPENDING; + case TARGET_RLIMIT_STACK: + return RLIMIT_STACK; + default: + return code; + } } static inline abi_long copy_from_user_timeval(struct timeval *tv, @@ -4310,13 +4386,10 @@ static inline abi_long target_truncate64(void *cpu_env, const char *arg1, abi_long arg3, abi_long arg4) { -#ifdef TARGET_ARM - if (((CPUARMState *)cpu_env)->eabi) - { + if (regpairs_aligned(cpu_env)) { arg2 = arg3; arg3 = arg4; - } -#endif + } return get_errno(truncate64(arg1, target_offset64(arg2, arg3))); } #endif @@ -4327,13 +4400,10 @@ static inline abi_long target_ftruncate64(void *cpu_env, abi_long arg1, abi_long arg3, abi_long arg4) { -#ifdef TARGET_ARM - if (((CPUARMState *)cpu_env)->eabi) - { + if (regpairs_aligned(cpu_env)) { arg2 = arg3; arg3 = arg4; - } -#endif + } return get_errno(ftruncate64(arg1, target_offset64(arg2, arg3))); } #endif @@ -5543,7 +5613,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; case TARGET_NR_setrlimit: { - int resource = arg1; + int resource = target_to_host_resource(arg1); struct target_rlimit *target_rlim; struct rlimit rlim; if (!lock_user_struct(VERIFY_READ, target_rlim, arg2, 1)) @@ -5556,7 +5626,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; case TARGET_NR_getrlimit: { - int resource = arg1; + int resource = target_to_host_resource(arg1); struct target_rlimit *target_rlim; struct rlimit rlim; @@ -5684,6 +5754,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, if (arg_sigset) { sig.set = &set; + if (arg_sigsize != sizeof(*target_sigset)) { + /* Like the kernel, we enforce correct size sigsets */ + ret = -TARGET_EINVAL; + goto fail; + } target_sigset = lock_user(VERIFY_READ, arg_sigset, sizeof(*target_sigset), 1); if (!target_sigset) { @@ -6787,20 +6862,16 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_pread case TARGET_NR_pread: -#ifdef TARGET_ARM - if (((CPUARMState *)cpu_env)->eabi) + if (regpairs_aligned(cpu_env)) arg4 = arg5; -#endif if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0))) goto efault; ret = get_errno(pread(arg1, p, arg3, arg4)); unlock_user(p, arg2, ret); break; case TARGET_NR_pwrite: -#ifdef TARGET_ARM - if (((CPUARMState *)cpu_env)->eabi) + if (regpairs_aligned(cpu_env)) arg4 = arg5; -#endif if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1))) goto efault; ret = get_errno(pwrite(arg1, p, arg3, arg4)); @@ -6860,7 +6931,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, case TARGET_NR_ugetrlimit: { struct rlimit rlim; - ret = get_errno(getrlimit(arg1, &rlim)); + int resource = target_to_host_resource(arg1); + ret = get_errno(getrlimit(resource, &rlim)); if (!is_error(ret)) { struct target_rlimit *target_rlim; if (!lock_user_struct(VERIFY_WRITE, target_rlim, arg2, 0)) @@ -7550,14 +7622,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #ifdef TARGET_NR_readahead case TARGET_NR_readahead: #if TARGET_ABI_BITS == 32 -#ifdef TARGET_ARM - if (((CPUARMState *)cpu_env)->eabi) - { + if (regpairs_aligned(cpu_env)) { arg2 = arg3; arg3 = arg4; arg4 = arg5; } -#endif ret = get_errno(readahead(arg1, ((off64_t)arg3 << 32) | arg2, arg4)); #else ret = get_errno(readahead(arg1, arg2, arg3)); @@ -7990,6 +8059,34 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, } #endif #endif +#ifdef TARGET_NR_prlimit64 + case TARGET_NR_prlimit64: + { + /* args: pid, resource number, ptr to new rlimit, ptr to old rlimit */ + struct target_rlimit64 *target_rnew, *target_rold; + struct host_rlimit64 rnew, rold, *rnewp = 0; + if (arg3) { + if (!lock_user_struct(VERIFY_READ, target_rnew, arg3, 1)) { + goto efault; + } + rnew.rlim_cur = tswap64(target_rnew->rlim_cur); + rnew.rlim_max = tswap64(target_rnew->rlim_max); + unlock_user_struct(target_rnew, arg3, 0); + rnewp = &rnew; + } + + ret = get_errno(sys_prlimit64(arg1, arg2, rnewp, arg4 ? &rold : 0)); + if (!is_error(ret) && arg4) { + if (!lock_user_struct(VERIFY_WRITE, target_rold, arg4, 1)) { + goto efault; + } + target_rold->rlim_cur = tswap64(rold.rlim_cur); + target_rold->rlim_max = tswap64(rold.rlim_max); + unlock_user_struct(target_rold, arg4, 1); + } + break; + } +#endif default: unimplemented: gemu_log("qemu: Unsupported syscall: %d\n", num); |