188dae46dSSean Bruno /* 288dae46dSSean Bruno * qemu bsd user mode definition 388dae46dSSean Bruno * 488dae46dSSean Bruno * This program is free software; you can redistribute it and/or modify 588dae46dSSean Bruno * it under the terms of the GNU General Public License as published by 688dae46dSSean Bruno * the Free Software Foundation; either version 2 of the License, or 788dae46dSSean Bruno * (at your option) any later version. 888dae46dSSean Bruno * 988dae46dSSean Bruno * This program is distributed in the hope that it will be useful, 1088dae46dSSean Bruno * but WITHOUT ANY WARRANTY; without even the implied warranty of 1188dae46dSSean Bruno * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1288dae46dSSean Bruno * GNU General Public License for more details. 1388dae46dSSean Bruno * 1488dae46dSSean Bruno * You should have received a copy of the GNU General Public License 1588dae46dSSean Bruno * along with this program; if not, see <http://www.gnu.org/licenses/>. 1688dae46dSSean Bruno */ 1784778508Sblueswir1 #ifndef QEMU_H 1884778508Sblueswir1 #define QEMU_H 1984778508Sblueswir1 2084778508Sblueswir1 2184778508Sblueswir1 #include "cpu.h" 22f08b6170SPaolo Bonzini #include "exec/cpu_ldst.h" 2384778508Sblueswir1 2484778508Sblueswir1 #undef DEBUG_REMAP 2584778508Sblueswir1 #ifdef DEBUG_REMAP 2684778508Sblueswir1 #endif /* DEBUG_REMAP */ 2784778508Sblueswir1 28022c62cbSPaolo Bonzini #include "exec/user/abitypes.h" 2984778508Sblueswir1 304b599848SWarner Losh extern char **environ; 314b599848SWarner Losh 3284778508Sblueswir1 enum BSDType { 3384778508Sblueswir1 target_freebsd, 3484778508Sblueswir1 target_netbsd, 3584778508Sblueswir1 target_openbsd, 3684778508Sblueswir1 }; 3778cfb07fSJuergen Lock extern enum BSDType bsd_type; 3884778508Sblueswir1 3984778508Sblueswir1 #include "syscall_defs.h" 400c6940d0SLluís Vilanova #include "target_syscall.h" 4184778508Sblueswir1 #include "target_signal.h" 42022c62cbSPaolo Bonzini #include "exec/gdbstub.h" 4384778508Sblueswir1 442f7bb878SJuan Quintela #if defined(CONFIG_USE_NPTL) 4584778508Sblueswir1 #define THREAD __thread 4684778508Sblueswir1 #else 4784778508Sblueswir1 #define THREAD 4884778508Sblueswir1 #endif 4984778508Sblueswir1 50*c2bdd9a1SWarner Losh /* 51*c2bdd9a1SWarner Losh * This struct is used to hold certain information about the image. Basically, 52*c2bdd9a1SWarner Losh * it replicates in user space what would be certain task_struct fields in the 53*c2bdd9a1SWarner Losh * kernel 5484778508Sblueswir1 */ 5584778508Sblueswir1 struct image_info { 5684778508Sblueswir1 abi_ulong load_addr; 5784778508Sblueswir1 abi_ulong start_code; 5884778508Sblueswir1 abi_ulong end_code; 5984778508Sblueswir1 abi_ulong start_data; 6084778508Sblueswir1 abi_ulong end_data; 6184778508Sblueswir1 abi_ulong start_brk; 6284778508Sblueswir1 abi_ulong brk; 6384778508Sblueswir1 abi_ulong start_mmap; 6484778508Sblueswir1 abi_ulong mmap; 6584778508Sblueswir1 abi_ulong rss; 6684778508Sblueswir1 abi_ulong start_stack; 6784778508Sblueswir1 abi_ulong entry; 6884778508Sblueswir1 abi_ulong code_offset; 6984778508Sblueswir1 abi_ulong data_offset; 7084778508Sblueswir1 int personality; 7184778508Sblueswir1 }; 7284778508Sblueswir1 7384778508Sblueswir1 #define MAX_SIGQUEUE_SIZE 1024 7484778508Sblueswir1 7584778508Sblueswir1 struct sigqueue { 7684778508Sblueswir1 struct sigqueue *next; 7784778508Sblueswir1 }; 7884778508Sblueswir1 7984778508Sblueswir1 struct emulated_sigtable { 8084778508Sblueswir1 int pending; /* true if signal is pending */ 8184778508Sblueswir1 struct sigqueue *first; 82*c2bdd9a1SWarner Losh /* in order to always have memory for the first signal, we put it here */ 83*c2bdd9a1SWarner Losh struct sigqueue info; 8484778508Sblueswir1 }; 8584778508Sblueswir1 86*c2bdd9a1SWarner Losh /* 87*c2bdd9a1SWarner Losh * NOTE: we force a big alignment so that the stack stored after is aligned too 88*c2bdd9a1SWarner Losh */ 8984778508Sblueswir1 typedef struct TaskState { 90bd88c780SAlex Bennée pid_t ts_tid; /* tid (or pid) of this task */ 91bd88c780SAlex Bennée 9284778508Sblueswir1 struct TaskState *next; 9384778508Sblueswir1 int used; /* non zero if used */ 9484778508Sblueswir1 struct image_info *info; 9584778508Sblueswir1 9684778508Sblueswir1 struct emulated_sigtable sigtab[TARGET_NSIG]; 9784778508Sblueswir1 struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ 9884778508Sblueswir1 struct sigqueue *first_free; /* first free siginfo queue entry */ 9984778508Sblueswir1 int signal_pending; /* non zero if a signal may be pending */ 10084778508Sblueswir1 101f7795e40SPhilippe Mathieu-Daudé uint8_t stack[]; 10284778508Sblueswir1 } __attribute__((aligned(16))) TaskState; 10384778508Sblueswir1 10484778508Sblueswir1 void init_task_state(TaskState *ts); 10584778508Sblueswir1 extern const char *qemu_uname_release; 1062fa5d9baSBlue Swirl extern unsigned long mmap_min_addr; 10784778508Sblueswir1 10884778508Sblueswir1 /* 10984778508Sblueswir1 * MAX_ARG_PAGES defines the number of pages allocated for arguments 11084778508Sblueswir1 * and envelope for the new program. 32 should suffice, this gives 11184778508Sblueswir1 * a maximum env+arg of 128kB w/4KB pages! 11284778508Sblueswir1 */ 11384778508Sblueswir1 #define MAX_ARG_PAGES 32 11484778508Sblueswir1 11584778508Sblueswir1 /* 11684778508Sblueswir1 * This structure is used to hold the arguments that are 11784778508Sblueswir1 * used when loading binaries. 11884778508Sblueswir1 */ 11984778508Sblueswir1 struct linux_binprm { 12084778508Sblueswir1 char buf[128]; 12184778508Sblueswir1 void *page[MAX_ARG_PAGES]; 12284778508Sblueswir1 abi_ulong p; 12384778508Sblueswir1 int fd; 12484778508Sblueswir1 int e_uid, e_gid; 12584778508Sblueswir1 int argc, envc; 12684778508Sblueswir1 char **argv; 12784778508Sblueswir1 char **envp; 12884778508Sblueswir1 char *filename; /* Name of binary */ 12984778508Sblueswir1 }; 13084778508Sblueswir1 13184778508Sblueswir1 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 13284778508Sblueswir1 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 13384778508Sblueswir1 abi_ulong stringp, int push_ptr); 13484778508Sblueswir1 int loader_exec(const char *filename, char **argv, char **envp, 13584778508Sblueswir1 struct target_pt_regs *regs, struct image_info *infop); 13684778508Sblueswir1 13784778508Sblueswir1 int load_elf_binary(struct linux_binprm *bprm, struct target_pt_regs *regs, 13884778508Sblueswir1 struct image_info *info); 13984778508Sblueswir1 int load_flt_binary(struct linux_binprm *bprm, struct target_pt_regs *regs, 14084778508Sblueswir1 struct image_info *info); 14184778508Sblueswir1 14284778508Sblueswir1 abi_long memcpy_to_target(abi_ulong dest, const void *src, 14384778508Sblueswir1 unsigned long len); 14484778508Sblueswir1 void target_set_brk(abi_ulong new_brk); 14584778508Sblueswir1 abi_long do_brk(abi_ulong new_brk); 14684778508Sblueswir1 void syscall_init(void); 14784778508Sblueswir1 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, 14884778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 14978cfb07fSJuergen Lock abi_long arg5, abi_long arg6, abi_long arg7, 15078cfb07fSJuergen Lock abi_long arg8); 15184778508Sblueswir1 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, 15284778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 15384778508Sblueswir1 abi_long arg5, abi_long arg6); 15484778508Sblueswir1 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, 15584778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 15684778508Sblueswir1 abi_long arg5, abi_long arg6); 157e5924d89SStefan Weil void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); 158dca1173cSAndreas Färber extern THREAD CPUState *thread_cpu; 1599349b4f9SAndreas Färber void cpu_loop(CPUArchState *env); 16084778508Sblueswir1 char *target_strerror(int err); 16184778508Sblueswir1 int get_osversion(void); 16284778508Sblueswir1 void fork_start(void); 16384778508Sblueswir1 void fork_end(int child); 16484778508Sblueswir1 1651de7afc9SPaolo Bonzini #include "qemu/log.h" 16684778508Sblueswir1 16784778508Sblueswir1 /* strace.c */ 16888dae46dSSean Bruno struct syscallname { 16988dae46dSSean Bruno int nr; 17088dae46dSSean Bruno const char *name; 17188dae46dSSean Bruno const char *format; 17288dae46dSSean Bruno void (*call)(const struct syscallname *, 17388dae46dSSean Bruno abi_long, abi_long, abi_long, 17488dae46dSSean Bruno abi_long, abi_long, abi_long); 17588dae46dSSean Bruno void (*result)(const struct syscallname *, abi_long); 17688dae46dSSean Bruno }; 17788dae46dSSean Bruno 17884778508Sblueswir1 void 17984778508Sblueswir1 print_freebsd_syscall(int num, 18084778508Sblueswir1 abi_long arg1, abi_long arg2, abi_long arg3, 18184778508Sblueswir1 abi_long arg4, abi_long arg5, abi_long arg6); 18284778508Sblueswir1 void print_freebsd_syscall_ret(int num, abi_long ret); 18384778508Sblueswir1 void 18484778508Sblueswir1 print_netbsd_syscall(int num, 18584778508Sblueswir1 abi_long arg1, abi_long arg2, abi_long arg3, 18684778508Sblueswir1 abi_long arg4, abi_long arg5, abi_long arg6); 18784778508Sblueswir1 void print_netbsd_syscall_ret(int num, abi_long ret); 18884778508Sblueswir1 void 18984778508Sblueswir1 print_openbsd_syscall(int num, 19084778508Sblueswir1 abi_long arg1, abi_long arg2, abi_long arg3, 19184778508Sblueswir1 abi_long arg4, abi_long arg5, abi_long arg6); 19284778508Sblueswir1 void print_openbsd_syscall_ret(int num, abi_long ret); 19384778508Sblueswir1 extern int do_strace; 19484778508Sblueswir1 19584778508Sblueswir1 /* signal.c */ 1969349b4f9SAndreas Färber void process_pending_signals(CPUArchState *cpu_env); 19784778508Sblueswir1 void signal_init(void); 1989349b4f9SAndreas Färber long do_sigreturn(CPUArchState *env); 1999349b4f9SAndreas Färber long do_rt_sigreturn(CPUArchState *env); 20084778508Sblueswir1 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); 20184778508Sblueswir1 20284778508Sblueswir1 /* mmap.c */ 20384778508Sblueswir1 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 20484778508Sblueswir1 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 20584778508Sblueswir1 int flags, int fd, abi_ulong offset); 20684778508Sblueswir1 int target_munmap(abi_ulong start, abi_ulong len); 20784778508Sblueswir1 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 20884778508Sblueswir1 abi_ulong new_size, unsigned long flags, 20984778508Sblueswir1 abi_ulong new_addr); 21084778508Sblueswir1 int target_msync(abi_ulong start, abi_ulong len, int flags); 21184778508Sblueswir1 extern unsigned long last_brk; 21284778508Sblueswir1 void mmap_fork_start(void); 21384778508Sblueswir1 void mmap_fork_end(int child); 21484778508Sblueswir1 21528e738dcSBlue Swirl /* main.c */ 21628e738dcSBlue Swirl extern unsigned long x86_stack_size; 21728e738dcSBlue Swirl 21884778508Sblueswir1 /* user access */ 21984778508Sblueswir1 2201720751fSRichard Henderson #define VERIFY_READ PAGE_READ 2211720751fSRichard Henderson #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) 22284778508Sblueswir1 2231720751fSRichard Henderson static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) 22484778508Sblueswir1 { 2251720751fSRichard Henderson return page_check_range((target_ulong)addr, size, type) == 0; 22684778508Sblueswir1 } 22784778508Sblueswir1 228*c2bdd9a1SWarner Losh /* 229*c2bdd9a1SWarner Losh * NOTE __get_user and __put_user use host pointers and don't check access. 230*c2bdd9a1SWarner Losh * 231*c2bdd9a1SWarner Losh * These are usually used to access struct data members once the struct has been 232*c2bdd9a1SWarner Losh * locked - usually with lock_user_struct(). 23384778508Sblueswir1 */ 23484778508Sblueswir1 #define __put_user(x, hptr)\ 23584778508Sblueswir1 ({\ 23684778508Sblueswir1 int size = sizeof(*hptr);\ 23784778508Sblueswir1 switch (size) {\ 23884778508Sblueswir1 case 1:\ 23984778508Sblueswir1 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ 24084778508Sblueswir1 break;\ 24184778508Sblueswir1 case 2:\ 24284778508Sblueswir1 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ 24384778508Sblueswir1 break;\ 24484778508Sblueswir1 case 4:\ 24584778508Sblueswir1 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ 24684778508Sblueswir1 break;\ 24784778508Sblueswir1 case 8:\ 24884778508Sblueswir1 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ 24984778508Sblueswir1 break;\ 25084778508Sblueswir1 default:\ 25184778508Sblueswir1 abort();\ 25284778508Sblueswir1 } \ 25384778508Sblueswir1 0;\ 25484778508Sblueswir1 }) 25584778508Sblueswir1 25684778508Sblueswir1 #define __get_user(x, hptr) \ 25784778508Sblueswir1 ({\ 25884778508Sblueswir1 int size = sizeof(*hptr);\ 25984778508Sblueswir1 switch (size) {\ 26084778508Sblueswir1 case 1:\ 26184778508Sblueswir1 x = (typeof(*hptr))*(uint8_t *)(hptr);\ 26284778508Sblueswir1 break;\ 26384778508Sblueswir1 case 2:\ 26484778508Sblueswir1 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ 26584778508Sblueswir1 break;\ 26684778508Sblueswir1 case 4:\ 26784778508Sblueswir1 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ 26884778508Sblueswir1 break;\ 26984778508Sblueswir1 case 8:\ 27084778508Sblueswir1 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ 27184778508Sblueswir1 break;\ 27284778508Sblueswir1 default:\ 27384778508Sblueswir1 x = 0;\ 27484778508Sblueswir1 abort();\ 27584778508Sblueswir1 } \ 27684778508Sblueswir1 0;\ 27784778508Sblueswir1 }) 27884778508Sblueswir1 279*c2bdd9a1SWarner Losh /* 280*c2bdd9a1SWarner Losh * put_user()/get_user() take a guest address and check access 281*c2bdd9a1SWarner Losh * 282*c2bdd9a1SWarner Losh * These are usually used to access an atomic data type, such as an int, that 283*c2bdd9a1SWarner Losh * has been passed by address. These internally perform locking and unlocking 284*c2bdd9a1SWarner Losh * on the data type. 28584778508Sblueswir1 */ 28684778508Sblueswir1 #define put_user(x, gaddr, target_type) \ 28784778508Sblueswir1 ({ \ 28884778508Sblueswir1 abi_ulong __gaddr = (gaddr); \ 28984778508Sblueswir1 target_type *__hptr; \ 29084778508Sblueswir1 abi_long __ret; \ 29184778508Sblueswir1 if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ 29284778508Sblueswir1 __ret = __put_user((x), __hptr); \ 29384778508Sblueswir1 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 29484778508Sblueswir1 } else \ 29584778508Sblueswir1 __ret = -TARGET_EFAULT; \ 29684778508Sblueswir1 __ret; \ 29784778508Sblueswir1 }) 29884778508Sblueswir1 29984778508Sblueswir1 #define get_user(x, gaddr, target_type) \ 30084778508Sblueswir1 ({ \ 30184778508Sblueswir1 abi_ulong __gaddr = (gaddr); \ 30284778508Sblueswir1 target_type *__hptr; \ 30384778508Sblueswir1 abi_long __ret; \ 30484778508Sblueswir1 if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ 30584778508Sblueswir1 __ret = __get_user((x), __hptr); \ 30684778508Sblueswir1 unlock_user(__hptr, __gaddr, 0); \ 30784778508Sblueswir1 } else { \ 30884778508Sblueswir1 (x) = 0; \ 30984778508Sblueswir1 __ret = -TARGET_EFAULT; \ 31084778508Sblueswir1 } \ 31184778508Sblueswir1 __ret; \ 31284778508Sblueswir1 }) 31384778508Sblueswir1 31484778508Sblueswir1 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 31584778508Sblueswir1 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 31684778508Sblueswir1 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 31784778508Sblueswir1 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 31884778508Sblueswir1 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 31984778508Sblueswir1 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 32084778508Sblueswir1 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 32184778508Sblueswir1 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 32284778508Sblueswir1 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 32384778508Sblueswir1 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 32484778508Sblueswir1 32584778508Sblueswir1 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 32684778508Sblueswir1 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 32784778508Sblueswir1 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 32884778508Sblueswir1 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 32984778508Sblueswir1 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 33084778508Sblueswir1 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 33184778508Sblueswir1 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 33284778508Sblueswir1 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 33384778508Sblueswir1 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 33484778508Sblueswir1 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 33584778508Sblueswir1 336*c2bdd9a1SWarner Losh /* 337*c2bdd9a1SWarner Losh * copy_from_user() and copy_to_user() are usually used to copy data 33884778508Sblueswir1 * buffers between the target and host. These internally perform 33984778508Sblueswir1 * locking/unlocking of the memory. 34084778508Sblueswir1 */ 34184778508Sblueswir1 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 34284778508Sblueswir1 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 34384778508Sblueswir1 344*c2bdd9a1SWarner Losh /* 345*c2bdd9a1SWarner Losh * Functions for accessing guest memory. The tget and tput functions 346*c2bdd9a1SWarner Losh * read/write single values, byteswapping as necessary. The lock_user function 347*c2bdd9a1SWarner Losh * gets a pointer to a contiguous area of guest memory, but does not perform 348*c2bdd9a1SWarner Losh * any byteswapping. lock_user may return either a pointer to the guest 349*c2bdd9a1SWarner Losh * memory, or a temporary buffer. 350*c2bdd9a1SWarner Losh */ 35184778508Sblueswir1 352*c2bdd9a1SWarner Losh /* 353*c2bdd9a1SWarner Losh * Lock an area of guest memory into the host. If copy is true then the 354*c2bdd9a1SWarner Losh * host area will have the same contents as the guest. 355*c2bdd9a1SWarner Losh */ 356*c2bdd9a1SWarner Losh static inline void *lock_user(int type, abi_ulong guest_addr, long len, 357*c2bdd9a1SWarner Losh int copy) 35884778508Sblueswir1 { 35984778508Sblueswir1 if (!access_ok(type, guest_addr, len)) 36084778508Sblueswir1 return NULL; 36184778508Sblueswir1 #ifdef DEBUG_REMAP 36284778508Sblueswir1 { 36384778508Sblueswir1 void *addr; 364fd9a3048SMd Haris Iqbal addr = g_malloc(len); 36584778508Sblueswir1 if (copy) 3663e8f1628SRichard Henderson memcpy(addr, g2h_untagged(guest_addr), len); 36784778508Sblueswir1 else 36884778508Sblueswir1 memset(addr, 0, len); 36984778508Sblueswir1 return addr; 37084778508Sblueswir1 } 37184778508Sblueswir1 #else 3723e8f1628SRichard Henderson return g2h_untagged(guest_addr); 37384778508Sblueswir1 #endif 37484778508Sblueswir1 } 37584778508Sblueswir1 376*c2bdd9a1SWarner Losh /* 377*c2bdd9a1SWarner Losh * Unlock an area of guest memory. The first LEN bytes must be flushed back to 378*c2bdd9a1SWarner Losh * guest memory. host_ptr = NULL is explicitly allowed and does nothing. 379*c2bdd9a1SWarner Losh */ 38084778508Sblueswir1 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 38184778508Sblueswir1 long len) 38284778508Sblueswir1 { 38384778508Sblueswir1 38484778508Sblueswir1 #ifdef DEBUG_REMAP 38584778508Sblueswir1 if (!host_ptr) 38684778508Sblueswir1 return; 3873e8f1628SRichard Henderson if (host_ptr == g2h_untagged(guest_addr)) 38884778508Sblueswir1 return; 38984778508Sblueswir1 if (len > 0) 3903e8f1628SRichard Henderson memcpy(g2h_untagged(guest_addr), host_ptr, len); 391fd9a3048SMd Haris Iqbal g_free(host_ptr); 39284778508Sblueswir1 #endif 39384778508Sblueswir1 } 39484778508Sblueswir1 395*c2bdd9a1SWarner Losh /* 396*c2bdd9a1SWarner Losh * Return the length of a string in target memory or -TARGET_EFAULT if access 397*c2bdd9a1SWarner Losh * error. 398*c2bdd9a1SWarner Losh */ 39984778508Sblueswir1 abi_long target_strlen(abi_ulong gaddr); 40084778508Sblueswir1 40184778508Sblueswir1 /* Like lock_user but for null terminated strings. */ 40284778508Sblueswir1 static inline void *lock_user_string(abi_ulong guest_addr) 40384778508Sblueswir1 { 40484778508Sblueswir1 abi_long len; 40584778508Sblueswir1 len = target_strlen(guest_addr); 40684778508Sblueswir1 if (len < 0) 40784778508Sblueswir1 return NULL; 40884778508Sblueswir1 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 40984778508Sblueswir1 } 41084778508Sblueswir1 41141d1af4dSStefan Weil /* Helper macros for locking/unlocking a target struct. */ 41284778508Sblueswir1 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 41384778508Sblueswir1 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 41484778508Sblueswir1 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 41584778508Sblueswir1 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 41684778508Sblueswir1 4172f7bb878SJuan Quintela #if defined(CONFIG_USE_NPTL) 41884778508Sblueswir1 #include <pthread.h> 41984778508Sblueswir1 #endif 42084778508Sblueswir1 42184778508Sblueswir1 #endif /* QEMU_H */ 422