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" 41022c62cbSPaolo Bonzini #include "exec/gdbstub.h" 4284778508Sblueswir1 43c2bdd9a1SWarner Losh /* 44c2bdd9a1SWarner Losh * This struct is used to hold certain information about the image. Basically, 45c2bdd9a1SWarner Losh * it replicates in user space what would be certain task_struct fields in the 46c2bdd9a1SWarner Losh * kernel 4784778508Sblueswir1 */ 4884778508Sblueswir1 struct image_info { 4984778508Sblueswir1 abi_ulong load_addr; 5084778508Sblueswir1 abi_ulong start_code; 5184778508Sblueswir1 abi_ulong end_code; 5284778508Sblueswir1 abi_ulong start_data; 5384778508Sblueswir1 abi_ulong end_data; 5484778508Sblueswir1 abi_ulong start_brk; 5584778508Sblueswir1 abi_ulong brk; 5684778508Sblueswir1 abi_ulong start_mmap; 5784778508Sblueswir1 abi_ulong mmap; 5884778508Sblueswir1 abi_ulong rss; 5984778508Sblueswir1 abi_ulong start_stack; 6084778508Sblueswir1 abi_ulong entry; 6184778508Sblueswir1 abi_ulong code_offset; 6284778508Sblueswir1 abi_ulong data_offset; 6384778508Sblueswir1 }; 6484778508Sblueswir1 6584778508Sblueswir1 #define MAX_SIGQUEUE_SIZE 1024 6684778508Sblueswir1 6784778508Sblueswir1 struct sigqueue { 6884778508Sblueswir1 struct sigqueue *next; 6984778508Sblueswir1 }; 7084778508Sblueswir1 7184778508Sblueswir1 struct emulated_sigtable { 7284778508Sblueswir1 int pending; /* true if signal is pending */ 7384778508Sblueswir1 struct sigqueue *first; 74c2bdd9a1SWarner Losh /* in order to always have memory for the first signal, we put it here */ 75c2bdd9a1SWarner Losh struct sigqueue info; 7684778508Sblueswir1 }; 7784778508Sblueswir1 78c2bdd9a1SWarner Losh /* 79c2bdd9a1SWarner Losh * NOTE: we force a big alignment so that the stack stored after is aligned too 80c2bdd9a1SWarner Losh */ 8184778508Sblueswir1 typedef struct TaskState { 82bd88c780SAlex Bennée pid_t ts_tid; /* tid (or pid) of this task */ 83bd88c780SAlex Bennée 8484778508Sblueswir1 struct TaskState *next; 85*031fe7afSWarner Losh struct bsd_binprm *bprm; 8684778508Sblueswir1 int used; /* non zero if used */ 8784778508Sblueswir1 struct image_info *info; 8884778508Sblueswir1 8984778508Sblueswir1 struct emulated_sigtable sigtab[TARGET_NSIG]; 9084778508Sblueswir1 struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ 9184778508Sblueswir1 struct sigqueue *first_free; /* first free siginfo queue entry */ 9284778508Sblueswir1 int signal_pending; /* non zero if a signal may be pending */ 9384778508Sblueswir1 94f7795e40SPhilippe Mathieu-Daudé uint8_t stack[]; 9584778508Sblueswir1 } __attribute__((aligned(16))) TaskState; 9684778508Sblueswir1 9784778508Sblueswir1 void init_task_state(TaskState *ts); 9884778508Sblueswir1 extern const char *qemu_uname_release; 992fa5d9baSBlue Swirl extern unsigned long mmap_min_addr; 10084778508Sblueswir1 10184778508Sblueswir1 /* 10284778508Sblueswir1 * MAX_ARG_PAGES defines the number of pages allocated for arguments 10384778508Sblueswir1 * and envelope for the new program. 32 should suffice, this gives 10484778508Sblueswir1 * a maximum env+arg of 128kB w/4KB pages! 10584778508Sblueswir1 */ 10684778508Sblueswir1 #define MAX_ARG_PAGES 32 10784778508Sblueswir1 10884778508Sblueswir1 /* 10984778508Sblueswir1 * This structure is used to hold the arguments that are 11084778508Sblueswir1 * used when loading binaries. 11184778508Sblueswir1 */ 112afcbcff8SWarner Losh struct bsd_binprm { 11384778508Sblueswir1 char buf[128]; 11484778508Sblueswir1 void *page[MAX_ARG_PAGES]; 11584778508Sblueswir1 abi_ulong p; 11684778508Sblueswir1 int fd; 11784778508Sblueswir1 int e_uid, e_gid; 11884778508Sblueswir1 int argc, envc; 11984778508Sblueswir1 char **argv; 12084778508Sblueswir1 char **envp; 1211b50ff64SWarner Losh char *filename; /* (Given) Name of binary */ 1221b50ff64SWarner Losh char *fullpath; /* Full path of binary */ 12384778508Sblueswir1 }; 12484778508Sblueswir1 12584778508Sblueswir1 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 12684778508Sblueswir1 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 127ffa03665SWarner Losh abi_ulong stringp); 12884778508Sblueswir1 int loader_exec(const char *filename, char **argv, char **envp, 129d37853f9SWarner Losh struct target_pt_regs *regs, struct image_info *infop, 130d37853f9SWarner Losh struct bsd_binprm *bprm); 13184778508Sblueswir1 132afcbcff8SWarner Losh int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, 13384778508Sblueswir1 struct image_info *info); 134afcbcff8SWarner Losh int load_flt_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, 13584778508Sblueswir1 struct image_info *info); 13684778508Sblueswir1 13784778508Sblueswir1 abi_long memcpy_to_target(abi_ulong dest, const void *src, 13884778508Sblueswir1 unsigned long len); 13984778508Sblueswir1 void target_set_brk(abi_ulong new_brk); 14084778508Sblueswir1 abi_long do_brk(abi_ulong new_brk); 14184778508Sblueswir1 void syscall_init(void); 14284778508Sblueswir1 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, 14384778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 14478cfb07fSJuergen Lock abi_long arg5, abi_long arg6, abi_long arg7, 14578cfb07fSJuergen Lock abi_long arg8); 14684778508Sblueswir1 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, 14784778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 14884778508Sblueswir1 abi_long arg5, abi_long arg6); 14984778508Sblueswir1 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, 15084778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 15184778508Sblueswir1 abi_long arg5, abi_long arg6); 152e5924d89SStefan Weil void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); 153d42df502SWarner Losh extern __thread CPUState *thread_cpu; 1549349b4f9SAndreas Färber void cpu_loop(CPUArchState *env); 15584778508Sblueswir1 char *target_strerror(int err); 15684778508Sblueswir1 int get_osversion(void); 15784778508Sblueswir1 void fork_start(void); 15884778508Sblueswir1 void fork_end(int child); 15984778508Sblueswir1 1601de7afc9SPaolo Bonzini #include "qemu/log.h" 16184778508Sblueswir1 16284778508Sblueswir1 /* strace.c */ 16388dae46dSSean Bruno struct syscallname { 16488dae46dSSean Bruno int nr; 16588dae46dSSean Bruno const char *name; 16688dae46dSSean Bruno const char *format; 16788dae46dSSean Bruno void (*call)(const struct syscallname *, 16888dae46dSSean Bruno abi_long, abi_long, abi_long, 16988dae46dSSean Bruno abi_long, abi_long, abi_long); 17088dae46dSSean Bruno void (*result)(const struct syscallname *, abi_long); 17188dae46dSSean Bruno }; 17288dae46dSSean Bruno 17384778508Sblueswir1 void 17484778508Sblueswir1 print_freebsd_syscall(int num, 17584778508Sblueswir1 abi_long arg1, abi_long arg2, abi_long arg3, 17684778508Sblueswir1 abi_long arg4, abi_long arg5, abi_long arg6); 17784778508Sblueswir1 void print_freebsd_syscall_ret(int num, abi_long ret); 17884778508Sblueswir1 void 17984778508Sblueswir1 print_netbsd_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_netbsd_syscall_ret(int num, abi_long ret); 18384778508Sblueswir1 void 18484778508Sblueswir1 print_openbsd_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_openbsd_syscall_ret(int num, abi_long ret); 18884778508Sblueswir1 extern int do_strace; 18984778508Sblueswir1 19084778508Sblueswir1 /* signal.c */ 1919349b4f9SAndreas Färber void process_pending_signals(CPUArchState *cpu_env); 19284778508Sblueswir1 void signal_init(void); 1939349b4f9SAndreas Färber long do_sigreturn(CPUArchState *env); 1949349b4f9SAndreas Färber long do_rt_sigreturn(CPUArchState *env); 19584778508Sblueswir1 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); 19684778508Sblueswir1 19784778508Sblueswir1 /* mmap.c */ 19884778508Sblueswir1 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 19984778508Sblueswir1 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 20084778508Sblueswir1 int flags, int fd, abi_ulong offset); 20184778508Sblueswir1 int target_munmap(abi_ulong start, abi_ulong len); 20284778508Sblueswir1 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 20384778508Sblueswir1 abi_ulong new_size, unsigned long flags, 20484778508Sblueswir1 abi_ulong new_addr); 20584778508Sblueswir1 int target_msync(abi_ulong start, abi_ulong len, int flags); 20684778508Sblueswir1 extern unsigned long last_brk; 20784778508Sblueswir1 void mmap_fork_start(void); 20884778508Sblueswir1 void mmap_fork_end(int child); 20984778508Sblueswir1 21028e738dcSBlue Swirl /* main.c */ 21101a298a5SWarner Losh extern char qemu_proc_pathname[]; 21228e738dcSBlue Swirl extern unsigned long x86_stack_size; 21328e738dcSBlue Swirl 21484778508Sblueswir1 /* user access */ 21584778508Sblueswir1 2161720751fSRichard Henderson #define VERIFY_READ PAGE_READ 2171720751fSRichard Henderson #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) 21884778508Sblueswir1 2191720751fSRichard Henderson static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) 22084778508Sblueswir1 { 2211720751fSRichard Henderson return page_check_range((target_ulong)addr, size, type) == 0; 22284778508Sblueswir1 } 22384778508Sblueswir1 224c2bdd9a1SWarner Losh /* 225c2bdd9a1SWarner Losh * NOTE __get_user and __put_user use host pointers and don't check access. 226c2bdd9a1SWarner Losh * 227c2bdd9a1SWarner Losh * These are usually used to access struct data members once the struct has been 228c2bdd9a1SWarner Losh * locked - usually with lock_user_struct(). 22984778508Sblueswir1 */ 23084778508Sblueswir1 #define __put_user(x, hptr)\ 23184778508Sblueswir1 ({\ 23284778508Sblueswir1 int size = sizeof(*hptr);\ 23384778508Sblueswir1 switch (size) {\ 23484778508Sblueswir1 case 1:\ 23584778508Sblueswir1 *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\ 23684778508Sblueswir1 break;\ 23784778508Sblueswir1 case 2:\ 23884778508Sblueswir1 *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\ 23984778508Sblueswir1 break;\ 24084778508Sblueswir1 case 4:\ 24184778508Sblueswir1 *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\ 24284778508Sblueswir1 break;\ 24384778508Sblueswir1 case 8:\ 24484778508Sblueswir1 *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\ 24584778508Sblueswir1 break;\ 24684778508Sblueswir1 default:\ 24784778508Sblueswir1 abort();\ 24884778508Sblueswir1 } \ 24984778508Sblueswir1 0;\ 25084778508Sblueswir1 }) 25184778508Sblueswir1 25284778508Sblueswir1 #define __get_user(x, hptr) \ 25384778508Sblueswir1 ({\ 25484778508Sblueswir1 int size = sizeof(*hptr);\ 25584778508Sblueswir1 switch (size) {\ 25684778508Sblueswir1 case 1:\ 25784778508Sblueswir1 x = (typeof(*hptr))*(uint8_t *)(hptr);\ 25884778508Sblueswir1 break;\ 25984778508Sblueswir1 case 2:\ 26084778508Sblueswir1 x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\ 26184778508Sblueswir1 break;\ 26284778508Sblueswir1 case 4:\ 26384778508Sblueswir1 x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\ 26484778508Sblueswir1 break;\ 26584778508Sblueswir1 case 8:\ 26684778508Sblueswir1 x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\ 26784778508Sblueswir1 break;\ 26884778508Sblueswir1 default:\ 26984778508Sblueswir1 x = 0;\ 27084778508Sblueswir1 abort();\ 27184778508Sblueswir1 } \ 27284778508Sblueswir1 0;\ 27384778508Sblueswir1 }) 27484778508Sblueswir1 275c2bdd9a1SWarner Losh /* 276c2bdd9a1SWarner Losh * put_user()/get_user() take a guest address and check access 277c2bdd9a1SWarner Losh * 278c2bdd9a1SWarner Losh * These are usually used to access an atomic data type, such as an int, that 279c2bdd9a1SWarner Losh * has been passed by address. These internally perform locking and unlocking 280c2bdd9a1SWarner Losh * on the data type. 28184778508Sblueswir1 */ 28284778508Sblueswir1 #define put_user(x, gaddr, target_type) \ 28384778508Sblueswir1 ({ \ 28484778508Sblueswir1 abi_ulong __gaddr = (gaddr); \ 28584778508Sblueswir1 target_type *__hptr; \ 28684778508Sblueswir1 abi_long __ret; \ 28733066934SWarner Losh __hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0); \ 28833066934SWarner Losh if (__hptr) { \ 28984778508Sblueswir1 __ret = __put_user((x), __hptr); \ 29084778508Sblueswir1 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 29184778508Sblueswir1 } else \ 29284778508Sblueswir1 __ret = -TARGET_EFAULT; \ 29384778508Sblueswir1 __ret; \ 29484778508Sblueswir1 }) 29584778508Sblueswir1 29684778508Sblueswir1 #define get_user(x, gaddr, target_type) \ 29784778508Sblueswir1 ({ \ 29884778508Sblueswir1 abi_ulong __gaddr = (gaddr); \ 29984778508Sblueswir1 target_type *__hptr; \ 30084778508Sblueswir1 abi_long __ret; \ 30133066934SWarner Losh __hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1); \ 30233066934SWarner Losh if (__hptr) { \ 30384778508Sblueswir1 __ret = __get_user((x), __hptr); \ 30484778508Sblueswir1 unlock_user(__hptr, __gaddr, 0); \ 30584778508Sblueswir1 } else { \ 30684778508Sblueswir1 (x) = 0; \ 30784778508Sblueswir1 __ret = -TARGET_EFAULT; \ 30884778508Sblueswir1 } \ 30984778508Sblueswir1 __ret; \ 31084778508Sblueswir1 }) 31184778508Sblueswir1 31284778508Sblueswir1 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 31384778508Sblueswir1 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 31484778508Sblueswir1 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 31584778508Sblueswir1 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 31684778508Sblueswir1 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 31784778508Sblueswir1 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 31884778508Sblueswir1 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 31984778508Sblueswir1 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 32084778508Sblueswir1 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 32184778508Sblueswir1 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 32284778508Sblueswir1 32384778508Sblueswir1 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 32484778508Sblueswir1 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 32584778508Sblueswir1 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 32684778508Sblueswir1 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 32784778508Sblueswir1 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 32884778508Sblueswir1 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 32984778508Sblueswir1 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 33084778508Sblueswir1 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 33184778508Sblueswir1 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 33284778508Sblueswir1 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 33384778508Sblueswir1 334c2bdd9a1SWarner Losh /* 335c2bdd9a1SWarner Losh * copy_from_user() and copy_to_user() are usually used to copy data 33684778508Sblueswir1 * buffers between the target and host. These internally perform 33784778508Sblueswir1 * locking/unlocking of the memory. 33884778508Sblueswir1 */ 33984778508Sblueswir1 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 34084778508Sblueswir1 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 34184778508Sblueswir1 342c2bdd9a1SWarner Losh /* 343c2bdd9a1SWarner Losh * Functions for accessing guest memory. The tget and tput functions 344c2bdd9a1SWarner Losh * read/write single values, byteswapping as necessary. The lock_user function 345c2bdd9a1SWarner Losh * gets a pointer to a contiguous area of guest memory, but does not perform 346c2bdd9a1SWarner Losh * any byteswapping. lock_user may return either a pointer to the guest 347c2bdd9a1SWarner Losh * memory, or a temporary buffer. 348c2bdd9a1SWarner Losh */ 34984778508Sblueswir1 350c2bdd9a1SWarner Losh /* 351c2bdd9a1SWarner Losh * Lock an area of guest memory into the host. If copy is true then the 352c2bdd9a1SWarner Losh * host area will have the same contents as the guest. 353c2bdd9a1SWarner Losh */ 354c2bdd9a1SWarner Losh static inline void *lock_user(int type, abi_ulong guest_addr, long len, 355c2bdd9a1SWarner Losh int copy) 35684778508Sblueswir1 { 357cb0ea019SWarner Losh if (!access_ok(type, guest_addr, len)) { 35884778508Sblueswir1 return NULL; 359cb0ea019SWarner Losh } 36084778508Sblueswir1 #ifdef DEBUG_REMAP 36184778508Sblueswir1 { 36284778508Sblueswir1 void *addr; 363fd9a3048SMd Haris Iqbal addr = g_malloc(len); 364cb0ea019SWarner Losh if (copy) { 3653e8f1628SRichard Henderson memcpy(addr, g2h_untagged(guest_addr), len); 366cb0ea019SWarner Losh } else { 36784778508Sblueswir1 memset(addr, 0, len); 368cb0ea019SWarner Losh } 36984778508Sblueswir1 return addr; 37084778508Sblueswir1 } 37184778508Sblueswir1 #else 3723e8f1628SRichard Henderson return g2h_untagged(guest_addr); 37384778508Sblueswir1 #endif 37484778508Sblueswir1 } 37584778508Sblueswir1 376c2bdd9a1SWarner Losh /* 377c2bdd9a1SWarner Losh * Unlock an area of guest memory. The first LEN bytes must be flushed back to 378c2bdd9a1SWarner Losh * guest memory. host_ptr = NULL is explicitly allowed and does nothing. 379c2bdd9a1SWarner Losh */ 38084778508Sblueswir1 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 38184778508Sblueswir1 long len) 38284778508Sblueswir1 { 38384778508Sblueswir1 38484778508Sblueswir1 #ifdef DEBUG_REMAP 385cb0ea019SWarner Losh if (!host_ptr) { 38684778508Sblueswir1 return; 387cb0ea019SWarner Losh } 388cb0ea019SWarner Losh if (host_ptr == g2h_untagged(guest_addr)) { 38984778508Sblueswir1 return; 390cb0ea019SWarner Losh } 391cb0ea019SWarner Losh if (len > 0) { 3923e8f1628SRichard Henderson memcpy(g2h_untagged(guest_addr), host_ptr, len); 393cb0ea019SWarner Losh } 394fd9a3048SMd Haris Iqbal g_free(host_ptr); 39584778508Sblueswir1 #endif 39684778508Sblueswir1 } 39784778508Sblueswir1 398c2bdd9a1SWarner Losh /* 399c2bdd9a1SWarner Losh * Return the length of a string in target memory or -TARGET_EFAULT if access 400c2bdd9a1SWarner Losh * error. 401c2bdd9a1SWarner Losh */ 40284778508Sblueswir1 abi_long target_strlen(abi_ulong gaddr); 40384778508Sblueswir1 40484778508Sblueswir1 /* Like lock_user but for null terminated strings. */ 40584778508Sblueswir1 static inline void *lock_user_string(abi_ulong guest_addr) 40684778508Sblueswir1 { 40784778508Sblueswir1 abi_long len; 40884778508Sblueswir1 len = target_strlen(guest_addr); 409cb0ea019SWarner Losh if (len < 0) { 41084778508Sblueswir1 return NULL; 411cb0ea019SWarner Losh } 41284778508Sblueswir1 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 41384778508Sblueswir1 } 41484778508Sblueswir1 41541d1af4dSStefan Weil /* Helper macros for locking/unlocking a target struct. */ 41684778508Sblueswir1 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 41784778508Sblueswir1 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 41884778508Sblueswir1 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 41984778508Sblueswir1 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 42084778508Sblueswir1 42184778508Sblueswir1 #include <pthread.h> 42284778508Sblueswir1 42384778508Sblueswir1 #endif /* QEMU_H */ 424