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 #include "cpu.h" 21e5e44263SWarner Losh #include "qemu/units.h" 22f08b6170SPaolo Bonzini #include "exec/cpu_ldst.h" 23ab77bd84SWarner Losh #include "exec/exec-all.h" 2484778508Sblueswir1 2584778508Sblueswir1 #undef DEBUG_REMAP 2684778508Sblueswir1 27022c62cbSPaolo Bonzini #include "exec/user/abitypes.h" 2884778508Sblueswir1 294b599848SWarner Losh extern char **environ; 304b599848SWarner Losh 31ab77bd84SWarner Losh #include "exec/user/thunk.h" 32ab77bd84SWarner Losh #include "target_arch.h" 3384778508Sblueswir1 #include "syscall_defs.h" 340c6940d0SLluís Vilanova #include "target_syscall.h" 3582792244SWarner Losh #include "target_os_vmparam.h" 36790baaccSWarner Losh #include "target_os_signal.h" 37647afdf1SWarner Losh #include "target.h" 38022c62cbSPaolo Bonzini #include "exec/gdbstub.h" 39e022d9caSEmanuele Giuseppe Esposito #include "qemu/clang-tsa.h" 4084778508Sblueswir1 41*9b4a902dSStacey Son #include "qemu-os.h" 42c2bdd9a1SWarner Losh /* 43c2bdd9a1SWarner Losh * This struct is used to hold certain information about the image. Basically, 44c2bdd9a1SWarner Losh * it replicates in user space what would be certain task_struct fields in the 45c2bdd9a1SWarner Losh * kernel 4684778508Sblueswir1 */ 4784778508Sblueswir1 struct image_info { 480475f8faSWarner Losh abi_ulong load_bias; 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 brk; 5584778508Sblueswir1 abi_ulong rss; 5684778508Sblueswir1 abi_ulong start_stack; 5784778508Sblueswir1 abi_ulong entry; 5884778508Sblueswir1 abi_ulong code_offset; 5984778508Sblueswir1 abi_ulong data_offset; 600475f8faSWarner Losh abi_ulong arg_start; 610475f8faSWarner Losh abi_ulong arg_end; 620475f8faSWarner Losh uint32_t elf_flags; 6384778508Sblueswir1 }; 6484778508Sblueswir1 6584778508Sblueswir1 struct emulated_sigtable { 6684778508Sblueswir1 int pending; /* true if signal is pending */ 67b46d4ad7SWarner Losh target_siginfo_t info; 6884778508Sblueswir1 }; 6984778508Sblueswir1 70c2bdd9a1SWarner Losh /* 71c2bdd9a1SWarner Losh * NOTE: we force a big alignment so that the stack stored after is aligned too 72c2bdd9a1SWarner Losh */ 7384778508Sblueswir1 typedef struct TaskState { 74bd88c780SAlex Bennée pid_t ts_tid; /* tid (or pid) of this task */ 75bd88c780SAlex Bennée 7684778508Sblueswir1 struct TaskState *next; 77031fe7afSWarner Losh struct bsd_binprm *bprm; 7884778508Sblueswir1 struct image_info *info; 7984778508Sblueswir1 8038be620cSWarner Losh struct emulated_sigtable sync_signal; 8138be620cSWarner Losh /* 8238be620cSWarner Losh * TODO: Since we block all signals while returning to the main CPU 8338be620cSWarner Losh * loop, this needn't be an array 8438be620cSWarner Losh */ 8584778508Sblueswir1 struct emulated_sigtable sigtab[TARGET_NSIG]; 8648047225SWarner Losh /* 8748047225SWarner Losh * Nonzero if process_pending_signals() needs to do something (either 8848047225SWarner Losh * handle a pending signal or unblock signals). 8948047225SWarner Losh * This flag is written from a signal handler so should be accessed via 9048047225SWarner Losh * the qatomic_read() and qatomic_set() functions. (It is not accessed 9148047225SWarner Losh * from multiple threads.) 9248047225SWarner Losh */ 9348047225SWarner Losh int signal_pending; 946c6d4b56SWarner Losh /* True if we're leaving a sigsuspend and sigsuspend_mask is valid. */ 956c6d4b56SWarner Losh bool in_sigsuspend; 96149076adSWarner Losh /* 97149076adSWarner Losh * This thread's signal mask, as requested by the guest program. 98149076adSWarner Losh * The actual signal mask of this thread may differ: 99149076adSWarner Losh * + we don't let SIGSEGV and SIGBUS be blocked while running guest code 100149076adSWarner Losh * + sometimes we block all signals to avoid races 101149076adSWarner Losh */ 102149076adSWarner Losh sigset_t signal_mask; 1036c6d4b56SWarner Losh /* 1046c6d4b56SWarner Losh * The signal mask imposed by a guest sigsuspend syscall, if we are 1056c6d4b56SWarner Losh * currently in the middle of such a syscall 1066c6d4b56SWarner Losh */ 1076c6d4b56SWarner Losh sigset_t sigsuspend_mask; 10884778508Sblueswir1 10946f4f76dSWarner Losh /* This thread's sigaltstack, if it has one */ 11046f4f76dSWarner Losh struct target_sigaltstack sigaltstack_used; 11184778508Sblueswir1 } __attribute__((aligned(16))) TaskState; 11284778508Sblueswir1 113653ccec2SWarner Losh void stop_all_tasks(void); 11484778508Sblueswir1 extern const char *qemu_uname_release; 11584778508Sblueswir1 11684778508Sblueswir1 /* 117e5e44263SWarner Losh * TARGET_ARG_MAX defines the number of bytes allocated for arguments 118e5e44263SWarner Losh * and envelope for the new program. 256k should suffice for a reasonable 119e5e44263SWarner Losh * maxiumum env+arg in 32-bit environments, bump it up to 512k for !ILP32 120e5e44263SWarner Losh * platforms. 12184778508Sblueswir1 */ 122e5e44263SWarner Losh #if TARGET_ABI_BITS > 32 123e5e44263SWarner Losh #define TARGET_ARG_MAX (512 * KiB) 124e5e44263SWarner Losh #else 125e5e44263SWarner Losh #define TARGET_ARG_MAX (256 * KiB) 126e5e44263SWarner Losh #endif 127e5e44263SWarner Losh #define MAX_ARG_PAGES (TARGET_ARG_MAX / TARGET_PAGE_SIZE) 12884778508Sblueswir1 12984778508Sblueswir1 /* 13084778508Sblueswir1 * This structure is used to hold the arguments that are 13184778508Sblueswir1 * used when loading binaries. 13284778508Sblueswir1 */ 133afcbcff8SWarner Losh struct bsd_binprm { 13484778508Sblueswir1 char buf[128]; 13584778508Sblueswir1 void *page[MAX_ARG_PAGES]; 13684778508Sblueswir1 abi_ulong p; 13798b34d35SWarner Losh abi_ulong stringp; 13884778508Sblueswir1 int fd; 13984778508Sblueswir1 int e_uid, e_gid; 14084778508Sblueswir1 int argc, envc; 14184778508Sblueswir1 char **argv; 14284778508Sblueswir1 char **envp; 1431b50ff64SWarner Losh char *filename; /* (Given) Name of binary */ 1441b50ff64SWarner Losh char *fullpath; /* Full path of binary */ 1450475f8faSWarner Losh int (*core_dump)(int, CPUArchState *); 14684778508Sblueswir1 }; 14784778508Sblueswir1 14884778508Sblueswir1 void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); 14984778508Sblueswir1 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 150ffa03665SWarner Losh abi_ulong stringp); 15184778508Sblueswir1 int loader_exec(const char *filename, char **argv, char **envp, 152d37853f9SWarner Losh struct target_pt_regs *regs, struct image_info *infop, 153d37853f9SWarner Losh struct bsd_binprm *bprm); 15484778508Sblueswir1 155afcbcff8SWarner Losh int load_elf_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, 15684778508Sblueswir1 struct image_info *info); 157afcbcff8SWarner Losh int load_flt_binary(struct bsd_binprm *bprm, struct target_pt_regs *regs, 15884778508Sblueswir1 struct image_info *info); 1590475f8faSWarner Losh int is_target_elf_binary(int fd); 16084778508Sblueswir1 16184778508Sblueswir1 abi_long memcpy_to_target(abi_ulong dest, const void *src, 16284778508Sblueswir1 unsigned long len); 16384778508Sblueswir1 void target_set_brk(abi_ulong new_brk); 16484778508Sblueswir1 abi_long do_brk(abi_ulong new_brk); 16584778508Sblueswir1 void syscall_init(void); 16684778508Sblueswir1 abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, 16784778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 16878cfb07fSJuergen Lock abi_long arg5, abi_long arg6, abi_long arg7, 16978cfb07fSJuergen Lock abi_long arg8); 17084778508Sblueswir1 abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1, 17184778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 17284778508Sblueswir1 abi_long arg5, abi_long arg6); 17384778508Sblueswir1 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1, 17484778508Sblueswir1 abi_long arg2, abi_long arg3, abi_long arg4, 17584778508Sblueswir1 abi_long arg5, abi_long arg6); 1769edc6313SMarc-André Lureau void gemu_log(const char *fmt, ...) G_GNUC_PRINTF(1, 2); 177d42df502SWarner Losh extern __thread CPUState *thread_cpu; 1789349b4f9SAndreas Färber void cpu_loop(CPUArchState *env); 17984778508Sblueswir1 char *target_strerror(int err); 18084778508Sblueswir1 int get_osversion(void); 18184778508Sblueswir1 void fork_start(void); 18284778508Sblueswir1 void fork_end(int child); 18384778508Sblueswir1 1841de7afc9SPaolo Bonzini #include "qemu/log.h" 18584778508Sblueswir1 18684778508Sblueswir1 /* strace.c */ 18788dae46dSSean Bruno struct syscallname { 18888dae46dSSean Bruno int nr; 18988dae46dSSean Bruno const char *name; 19088dae46dSSean Bruno const char *format; 19188dae46dSSean Bruno void (*call)(const struct syscallname *, 19288dae46dSSean Bruno abi_long, abi_long, abi_long, 19388dae46dSSean Bruno abi_long, abi_long, abi_long); 19488dae46dSSean Bruno void (*result)(const struct syscallname *, abi_long); 19588dae46dSSean Bruno }; 19688dae46dSSean Bruno 19784778508Sblueswir1 void 19884778508Sblueswir1 print_freebsd_syscall(int num, 19984778508Sblueswir1 abi_long arg1, abi_long arg2, abi_long arg3, 20084778508Sblueswir1 abi_long arg4, abi_long arg5, abi_long arg6); 20184778508Sblueswir1 void print_freebsd_syscall_ret(int num, abi_long ret); 20284778508Sblueswir1 void 20384778508Sblueswir1 print_netbsd_syscall(int num, 20484778508Sblueswir1 abi_long arg1, abi_long arg2, abi_long arg3, 20584778508Sblueswir1 abi_long arg4, abi_long arg5, abi_long arg6); 20684778508Sblueswir1 void print_netbsd_syscall_ret(int num, abi_long ret); 20784778508Sblueswir1 void 20884778508Sblueswir1 print_openbsd_syscall(int num, 20984778508Sblueswir1 abi_long arg1, abi_long arg2, abi_long arg3, 21084778508Sblueswir1 abi_long arg4, abi_long arg5, abi_long arg6); 21184778508Sblueswir1 void print_openbsd_syscall_ret(int num, abi_long ret); 212fd5bec9aSWarner Losh /** 213fd5bec9aSWarner Losh * print_taken_signal: 214fd5bec9aSWarner Losh * @target_signum: target signal being taken 215fd5bec9aSWarner Losh * @tinfo: target_siginfo_t which will be passed to the guest for the signal 216fd5bec9aSWarner Losh * 217fd5bec9aSWarner Losh * Print strace output indicating that this signal is being taken by the guest, 218fd5bec9aSWarner Losh * in a format similar to: 219fd5bec9aSWarner Losh * --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} --- 220fd5bec9aSWarner Losh */ 221fd5bec9aSWarner Losh void print_taken_signal(int target_signum, const target_siginfo_t *tinfo); 22284778508Sblueswir1 extern int do_strace; 22384778508Sblueswir1 22484778508Sblueswir1 /* mmap.c */ 22584778508Sblueswir1 int target_mprotect(abi_ulong start, abi_ulong len, int prot); 22684778508Sblueswir1 abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, 227be04f210SWarner Losh int flags, int fd, off_t offset); 22884778508Sblueswir1 int target_munmap(abi_ulong start, abi_ulong len); 22984778508Sblueswir1 abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, 23084778508Sblueswir1 abi_ulong new_size, unsigned long flags, 23184778508Sblueswir1 abi_ulong new_addr); 23284778508Sblueswir1 int target_msync(abi_ulong start, abi_ulong len, int flags); 233be04f210SWarner Losh extern abi_ulong mmap_next_start; 234be04f210SWarner Losh abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size); 235e022d9caSEmanuele Giuseppe Esposito void TSA_NO_TSA mmap_fork_start(void); 236e022d9caSEmanuele Giuseppe Esposito void TSA_NO_TSA mmap_fork_end(int child); 23784778508Sblueswir1 23828e738dcSBlue Swirl /* main.c */ 23901a298a5SWarner Losh extern char qemu_proc_pathname[]; 240312a0b1cSWarner Losh extern unsigned long target_maxtsiz; 241312a0b1cSWarner Losh extern unsigned long target_dfldsiz; 242312a0b1cSWarner Losh extern unsigned long target_maxdsiz; 243312a0b1cSWarner Losh extern unsigned long target_dflssiz; 244312a0b1cSWarner Losh extern unsigned long target_maxssiz; 245312a0b1cSWarner Losh extern unsigned long target_sgrowsiz; 24628e738dcSBlue Swirl 247deeff83bSWarner Losh /* os-syscall.c */ 248e5f674f0SWarner Losh abi_long get_errno(abi_long ret); 249e5f674f0SWarner Losh bool is_error(abi_long ret); 250deeff83bSWarner Losh int host_to_target_errno(int err); 251e5f674f0SWarner Losh 252da07e694SWarner Losh /* os-sys.c */ 2537adda6deSKyle Evans abi_long do_freebsd_sysctl(CPUArchState *env, abi_ulong namep, int32_t namelen, 2547adda6deSKyle Evans abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen); 2556da777e2SKyle Evans abi_long do_freebsd_sysctlbyname(CPUArchState *env, abi_ulong namep, 2566da777e2SKyle Evans int32_t namelen, abi_ulong oldp, abi_ulong oldlenp, abi_ulong newp, 2576da777e2SKyle Evans abi_ulong newlen); 258da07e694SWarner Losh abi_long do_freebsd_sysarch(void *cpu_env, abi_long arg1, abi_long arg2); 259da07e694SWarner Losh 26084778508Sblueswir1 /* user access */ 26184778508Sblueswir1 2621720751fSRichard Henderson #define VERIFY_READ PAGE_READ 2631720751fSRichard Henderson #define VERIFY_WRITE (PAGE_READ | PAGE_WRITE) 26484778508Sblueswir1 2651720751fSRichard Henderson static inline bool access_ok(int type, abi_ulong addr, abi_ulong size) 26684778508Sblueswir1 { 267bef6f008SRichard Henderson return page_check_range((target_ulong)addr, size, type); 26884778508Sblueswir1 } 26984778508Sblueswir1 270c2bdd9a1SWarner Losh /* 271c2bdd9a1SWarner Losh * NOTE __get_user and __put_user use host pointers and don't check access. 272c2bdd9a1SWarner Losh * 273c2bdd9a1SWarner Losh * These are usually used to access struct data members once the struct has been 274c2bdd9a1SWarner Losh * locked - usually with lock_user_struct(). 27584778508Sblueswir1 */ 2766538c682SWarner Losh #define __put_user_e(x, hptr, e) \ 2776538c682SWarner Losh do { \ 2786538c682SWarner Losh PRAGMA_DISABLE_PACKED_WARNING; \ 2796538c682SWarner Losh (__builtin_choose_expr(sizeof(*(hptr)) == 1, stb_p, \ 2806538c682SWarner Losh __builtin_choose_expr(sizeof(*(hptr)) == 2, stw_##e##_p, \ 2816538c682SWarner Losh __builtin_choose_expr(sizeof(*(hptr)) == 4, stl_##e##_p, \ 2826538c682SWarner Losh __builtin_choose_expr(sizeof(*(hptr)) == 8, stq_##e##_p, abort)))) \ 2836538c682SWarner Losh ((hptr), (x)), (void)0); \ 2846538c682SWarner Losh PRAGMA_REENABLE_PACKED_WARNING; \ 2856538c682SWarner Losh } while (0) 28684778508Sblueswir1 2876538c682SWarner Losh #define __get_user_e(x, hptr, e) \ 2886538c682SWarner Losh do { \ 2896538c682SWarner Losh PRAGMA_DISABLE_PACKED_WARNING; \ 2906538c682SWarner Losh ((x) = (typeof(*hptr))( \ 2916538c682SWarner Losh __builtin_choose_expr(sizeof(*(hptr)) == 1, ldub_p, \ 2926538c682SWarner Losh __builtin_choose_expr(sizeof(*(hptr)) == 2, lduw_##e##_p, \ 2936538c682SWarner Losh __builtin_choose_expr(sizeof(*(hptr)) == 4, ldl_##e##_p, \ 2946538c682SWarner Losh __builtin_choose_expr(sizeof(*(hptr)) == 8, ldq_##e##_p, abort)))) \ 2956538c682SWarner Losh (hptr)), (void)0); \ 2966538c682SWarner Losh PRAGMA_REENABLE_PACKED_WARNING; \ 2976538c682SWarner Losh } while (0) 2986538c682SWarner Losh 2996538c682SWarner Losh 3006538c682SWarner Losh #if TARGET_BIG_ENDIAN 3016538c682SWarner Losh # define __put_user(x, hptr) __put_user_e(x, hptr, be) 3026538c682SWarner Losh # define __get_user(x, hptr) __get_user_e(x, hptr, be) 3036538c682SWarner Losh #else 3046538c682SWarner Losh # define __put_user(x, hptr) __put_user_e(x, hptr, le) 3056538c682SWarner Losh # define __get_user(x, hptr) __get_user_e(x, hptr, le) 3066538c682SWarner Losh #endif 30784778508Sblueswir1 308c2bdd9a1SWarner Losh /* 309c2bdd9a1SWarner Losh * put_user()/get_user() take a guest address and check access 310c2bdd9a1SWarner Losh * 311c2bdd9a1SWarner Losh * These are usually used to access an atomic data type, such as an int, that 312c2bdd9a1SWarner Losh * has been passed by address. These internally perform locking and unlocking 313c2bdd9a1SWarner Losh * on the data type. 31484778508Sblueswir1 */ 31584778508Sblueswir1 #define put_user(x, gaddr, target_type) \ 31684778508Sblueswir1 ({ \ 31784778508Sblueswir1 abi_ulong __gaddr = (gaddr); \ 31884778508Sblueswir1 target_type *__hptr; \ 3196538c682SWarner Losh abi_long __ret = 0; \ 32033066934SWarner Losh __hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0); \ 32133066934SWarner Losh if (__hptr) { \ 3226538c682SWarner Losh __put_user((x), __hptr); \ 32384778508Sblueswir1 unlock_user(__hptr, __gaddr, sizeof(target_type)); \ 32484778508Sblueswir1 } else \ 32584778508Sblueswir1 __ret = -TARGET_EFAULT; \ 32684778508Sblueswir1 __ret; \ 32784778508Sblueswir1 }) 32884778508Sblueswir1 32984778508Sblueswir1 #define get_user(x, gaddr, target_type) \ 33084778508Sblueswir1 ({ \ 33184778508Sblueswir1 abi_ulong __gaddr = (gaddr); \ 33284778508Sblueswir1 target_type *__hptr; \ 3336538c682SWarner Losh abi_long __ret = 0; \ 33433066934SWarner Losh __hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1); \ 33533066934SWarner Losh if (__hptr) { \ 3366538c682SWarner Losh __get_user((x), __hptr); \ 33784778508Sblueswir1 unlock_user(__hptr, __gaddr, 0); \ 33884778508Sblueswir1 } else { \ 33984778508Sblueswir1 (x) = 0; \ 34084778508Sblueswir1 __ret = -TARGET_EFAULT; \ 34184778508Sblueswir1 } \ 34284778508Sblueswir1 __ret; \ 34384778508Sblueswir1 }) 34484778508Sblueswir1 34584778508Sblueswir1 #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) 34684778508Sblueswir1 #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) 34784778508Sblueswir1 #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) 34884778508Sblueswir1 #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) 34984778508Sblueswir1 #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) 35084778508Sblueswir1 #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) 35184778508Sblueswir1 #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) 35284778508Sblueswir1 #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) 35384778508Sblueswir1 #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) 35484778508Sblueswir1 #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) 35584778508Sblueswir1 35684778508Sblueswir1 #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) 35784778508Sblueswir1 #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) 35884778508Sblueswir1 #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) 35984778508Sblueswir1 #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) 36084778508Sblueswir1 #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) 36184778508Sblueswir1 #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) 36284778508Sblueswir1 #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) 36384778508Sblueswir1 #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) 36484778508Sblueswir1 #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) 36584778508Sblueswir1 #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) 36684778508Sblueswir1 367c2bdd9a1SWarner Losh /* 368c2bdd9a1SWarner Losh * copy_from_user() and copy_to_user() are usually used to copy data 36984778508Sblueswir1 * buffers between the target and host. These internally perform 37084778508Sblueswir1 * locking/unlocking of the memory. 37184778508Sblueswir1 */ 37284778508Sblueswir1 abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); 37384778508Sblueswir1 abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); 37484778508Sblueswir1 375c2bdd9a1SWarner Losh /* 376c2bdd9a1SWarner Losh * Functions for accessing guest memory. The tget and tput functions 377c2bdd9a1SWarner Losh * read/write single values, byteswapping as necessary. The lock_user function 378c2bdd9a1SWarner Losh * gets a pointer to a contiguous area of guest memory, but does not perform 379c2bdd9a1SWarner Losh * any byteswapping. lock_user may return either a pointer to the guest 380c2bdd9a1SWarner Losh * memory, or a temporary buffer. 381c2bdd9a1SWarner Losh */ 38284778508Sblueswir1 383c2bdd9a1SWarner Losh /* 384c2bdd9a1SWarner Losh * Lock an area of guest memory into the host. If copy is true then the 385c2bdd9a1SWarner Losh * host area will have the same contents as the guest. 386c2bdd9a1SWarner Losh */ 387c2bdd9a1SWarner Losh static inline void *lock_user(int type, abi_ulong guest_addr, long len, 388c2bdd9a1SWarner Losh int copy) 38984778508Sblueswir1 { 390cb0ea019SWarner Losh if (!access_ok(type, guest_addr, len)) { 39184778508Sblueswir1 return NULL; 392cb0ea019SWarner Losh } 39384778508Sblueswir1 #ifdef DEBUG_REMAP 39484778508Sblueswir1 { 39584778508Sblueswir1 void *addr; 396fd9a3048SMd Haris Iqbal addr = g_malloc(len); 397cb0ea019SWarner Losh if (copy) { 3983e8f1628SRichard Henderson memcpy(addr, g2h_untagged(guest_addr), len); 399cb0ea019SWarner Losh } else { 40084778508Sblueswir1 memset(addr, 0, len); 401cb0ea019SWarner Losh } 40284778508Sblueswir1 return addr; 40384778508Sblueswir1 } 40484778508Sblueswir1 #else 4053e8f1628SRichard Henderson return g2h_untagged(guest_addr); 40684778508Sblueswir1 #endif 40784778508Sblueswir1 } 40884778508Sblueswir1 409c2bdd9a1SWarner Losh /* 410c2bdd9a1SWarner Losh * Unlock an area of guest memory. The first LEN bytes must be flushed back to 411c2bdd9a1SWarner Losh * guest memory. host_ptr = NULL is explicitly allowed and does nothing. 412c2bdd9a1SWarner Losh */ 41384778508Sblueswir1 static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, 41484778508Sblueswir1 long len) 41584778508Sblueswir1 { 41684778508Sblueswir1 41784778508Sblueswir1 #ifdef DEBUG_REMAP 418cb0ea019SWarner Losh if (!host_ptr) { 41984778508Sblueswir1 return; 420cb0ea019SWarner Losh } 421cb0ea019SWarner Losh if (host_ptr == g2h_untagged(guest_addr)) { 42284778508Sblueswir1 return; 423cb0ea019SWarner Losh } 424cb0ea019SWarner Losh if (len > 0) { 4253e8f1628SRichard Henderson memcpy(g2h_untagged(guest_addr), host_ptr, len); 426cb0ea019SWarner Losh } 427fd9a3048SMd Haris Iqbal g_free(host_ptr); 42884778508Sblueswir1 #endif 42984778508Sblueswir1 } 43084778508Sblueswir1 431c2bdd9a1SWarner Losh /* 432c2bdd9a1SWarner Losh * Return the length of a string in target memory or -TARGET_EFAULT if access 433c2bdd9a1SWarner Losh * error. 434c2bdd9a1SWarner Losh */ 43584778508Sblueswir1 abi_long target_strlen(abi_ulong gaddr); 43684778508Sblueswir1 43784778508Sblueswir1 /* Like lock_user but for null terminated strings. */ 43884778508Sblueswir1 static inline void *lock_user_string(abi_ulong guest_addr) 43984778508Sblueswir1 { 44084778508Sblueswir1 abi_long len; 44184778508Sblueswir1 len = target_strlen(guest_addr); 442cb0ea019SWarner Losh if (len < 0) { 44384778508Sblueswir1 return NULL; 444cb0ea019SWarner Losh } 44584778508Sblueswir1 return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); 44684778508Sblueswir1 } 44784778508Sblueswir1 44841d1af4dSStefan Weil /* Helper macros for locking/unlocking a target struct. */ 44984778508Sblueswir1 #define lock_user_struct(type, host_ptr, guest_addr, copy) \ 45084778508Sblueswir1 (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) 45184778508Sblueswir1 #define unlock_user_struct(host_ptr, guest_addr, copy) \ 45284778508Sblueswir1 unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) 45384778508Sblueswir1 4540ff05082SWarner Losh static inline uint64_t target_arg64(uint32_t word0, uint32_t word1) 4550ff05082SWarner Losh { 4560ff05082SWarner Losh #if TARGET_ABI_BITS == 32 457ee3eb3a7SMarc-André Lureau #if TARGET_BIG_ENDIAN 4580ff05082SWarner Losh return ((uint64_t)word0 << 32) | word1; 4590ff05082SWarner Losh #else 4600ff05082SWarner Losh return ((uint64_t)word1 << 32) | word0; 4610ff05082SWarner Losh #endif 4620ff05082SWarner Losh #else /* TARGET_ABI_BITS != 32 */ 4630ff05082SWarner Losh return word0; 4640ff05082SWarner Losh #endif /* TARGET_ABI_BITS != 32 */ 4650ff05082SWarner Losh } 4660ff05082SWarner Losh 46784778508Sblueswir1 #include <pthread.h> 46884778508Sblueswir1 469aae57ac3SWarner Losh #include "user/safe-syscall.h" 470aae57ac3SWarner Losh 47184778508Sblueswir1 #endif /* QEMU_H */ 472