| #ifndef QEMU_H |
| #define QEMU_H |
| |
| #include <signal.h> |
| #include <string.h> |
| |
| #include "cpu.h" |
| |
| #undef DEBUG_REMAP |
| #ifdef DEBUG_REMAP |
| #include <stdlib.h> |
| #endif /* DEBUG_REMAP */ |
| |
| #include "exec/user/abitypes.h" |
| |
| #include "exec/user/thunk.h" |
| #include "syscall_defs.h" |
| #include "syscall.h" |
| #include "target_cpu.h" |
| #include "target_signal.h" |
| #include "exec/gdbstub.h" |
| #include "qemu/queue.h" |
| |
| #if defined(CONFIG_USE_NPTL) |
| #define THREAD __thread |
| #else |
| #define THREAD |
| #endif |
| |
| /* This struct is used to hold certain information about the image. |
| * Basically, it replicates in user space what would be certain |
| * task_struct fields in the kernel |
| */ |
| struct image_info { |
| abi_ulong load_bias; |
| abi_ulong load_addr; |
| abi_ulong start_code; |
| abi_ulong end_code; |
| abi_ulong start_data; |
| abi_ulong end_data; |
| abi_ulong start_brk; |
| abi_ulong brk; |
| abi_ulong start_mmap; |
| abi_ulong mmap; |
| abi_ulong rss; |
| abi_ulong start_stack; |
| abi_ulong stack_limit; |
| abi_ulong entry; |
| abi_ulong code_offset; |
| abi_ulong data_offset; |
| abi_ulong saved_auxv; |
| abi_ulong auxv_len; |
| abi_ulong arg_start; |
| abi_ulong arg_end; |
| uint32_t elf_flags; |
| int personality; |
| #ifdef CONFIG_USE_FDPIC |
| abi_ulong loadmap_addr; |
| uint16_t nsegs; |
| void *loadsegs; |
| abi_ulong pt_dynamic_addr; |
| struct image_info *other_info; |
| #endif |
| }; |
| |
| #ifdef TARGET_I386 |
| /* Information about the current linux thread */ |
| struct vm86_saved_state { |
| uint32_t eax; /* return code */ |
| uint32_t ebx; |
| uint32_t ecx; |
| uint32_t edx; |
| uint32_t esi; |
| uint32_t edi; |
| uint32_t ebp; |
| uint32_t esp; |
| uint32_t eflags; |
| uint32_t eip; |
| uint16_t cs, ss, ds, es, fs, gs; |
| }; |
| #endif |
| |
| #ifdef TARGET_ARM |
| /* FPU emulator */ |
| #include "nwfpe/fpa11.h" |
| #endif |
| |
| #define MAX_SIGQUEUE_SIZE 1024 |
| |
| struct sigqueue { |
| struct sigqueue *next; |
| target_siginfo_t info; |
| }; |
| |
| struct emulated_sigtable { |
| int pending; /* true if signal is pending */ |
| struct sigqueue *first; |
| struct sigqueue info; /* in order to always have memory for the |
| first signal, we put it here */ |
| }; |
| |
| /* NOTE: we force a big alignment so that the stack stored after is |
| aligned too */ |
| typedef struct TaskState { |
| pid_t ts_tid; /* tid (or pid) of this task */ |
| #ifdef TARGET_ARM |
| /* FPA state */ |
| FPA11 fpa; |
| int swi_errno; |
| #endif |
| #ifdef TARGET_UNICORE32 |
| int swi_errno; |
| #endif |
| #if defined(TARGET_I386) && !defined(TARGET_X86_64) |
| abi_ulong target_v86; |
| struct vm86_saved_state vm86_saved_regs; |
| struct target_vm86plus_struct vm86plus; |
| uint32_t v86flags; |
| uint32_t v86mask; |
| #endif |
| #ifdef CONFIG_USE_NPTL |
| abi_ulong child_tidptr; |
| #endif |
| #ifdef TARGET_M68K |
| int sim_syscalls; |
| #endif |
| #if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32) |
| /* Extra fields for semihosted binaries. */ |
| uint32_t heap_base; |
| uint32_t heap_limit; |
| #endif |
| uint32_t stack_base; |
| int used; /* non zero if used */ |
| struct image_info *info; |
| struct linux_binprm *bprm; |
| |
| struct emulated_sigtable sigtab[TARGET_NSIG]; |
| struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ |
| struct sigqueue *first_free; /* first free siginfo queue entry */ |
| int signal_pending; /* non zero if a signal may be pending */ |
| } __attribute__((aligned(16))) TaskState; |
| |
| extern char *exec_path; |
| void init_task_state(TaskState *ts); |
| void task_settid(TaskState *); |
| void stop_all_tasks(void); |
| extern const char *qemu_uname_release; |
| extern unsigned long mmap_min_addr; |
| |
| /* ??? See if we can avoid exposing so much of the loader internals. */ |
| /* |
| * MAX_ARG_PAGES defines the number of pages allocated for arguments |
| * and envelope for the new program. 32 should suffice, this gives |
| * a maximum env+arg of 128kB w/4KB pages! |
| */ |
| #define MAX_ARG_PAGES 33 |
| |
| /* Read a good amount of data initially, to hopefully get all the |
| program headers loaded. */ |
| #define BPRM_BUF_SIZE 1024 |
| |
| /* |
| * This structure is used to hold the arguments that are |
| * used when loading binaries. |
| */ |
| struct linux_binprm { |
| char buf[BPRM_BUF_SIZE] __attribute__((aligned)); |
| void *page[MAX_ARG_PAGES]; |
| abi_ulong p; |
| int fd; |
| int e_uid, e_gid; |
| int argc, envc; |
| char **argv; |
| char **envp; |
| char * filename; /* Name of binary */ |
| int (*core_dump)(int, const CPUArchState *); /* coredump routine */ |
| }; |
| |
| void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); |
| abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, |
| abi_ulong stringp, int push_ptr); |
| int loader_exec(const char * filename, char ** argv, char ** envp, |
| struct target_pt_regs * regs, struct image_info *infop, |
| struct linux_binprm *); |
| |
| int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
| struct image_info * info); |
| int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
| struct image_info * info); |
| |
| abi_long memcpy_to_target(abi_ulong dest, const void *src, |
| unsigned long len); |
| void target_set_brk(abi_ulong new_brk); |
| abi_long do_brk(abi_ulong new_brk); |
| void syscall_init(void); |
| abi_long do_syscall(void *cpu_env, int num, abi_long arg1, |
| abi_long arg2, abi_long arg3, abi_long arg4, |
| abi_long arg5, abi_long arg6, abi_long arg7, |
| abi_long arg8); |
| void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2); |
| extern THREAD CPUState *thread_cpu; |
| void cpu_loop(CPUArchState *env); |
| char *target_strerror(int err); |
| int get_osversion(void); |
| void fork_start(void); |
| void fork_end(int child); |
| |
| /* Creates the initial guest address space in the host memory space using |
| * the given host start address hint and size. The guest_start parameter |
| * specifies the start address of the guest space. guest_base will be the |
| * difference between the host start address computed by this function and |
| * guest_start. If fixed is specified, then the mapped address space must |
| * start at host_start. The real start address of the mapped memory space is |
| * returned or -1 if there was an error. |
| */ |
| unsigned long init_guest_space(unsigned long host_start, |
| unsigned long host_size, |
| unsigned long guest_start, |
| bool fixed); |
| |
| #include "qemu/log.h" |
| |
| /* syscall.c */ |
| int host_to_target_waitstatus(int status); |
| |
| /* strace.c */ |
| void print_syscall(int num, |
| abi_long arg1, abi_long arg2, abi_long arg3, |
| abi_long arg4, abi_long arg5, abi_long arg6); |
| void print_syscall_ret(int num, abi_long arg1); |
| extern int do_strace; |
| |
| /* signal.c */ |
| void process_pending_signals(CPUArchState *cpu_env); |
| void signal_init(void); |
| int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info); |
| void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info); |
| void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo); |
| int target_to_host_signal(int sig); |
| int host_to_target_signal(int sig); |
| long do_sigreturn(CPUArchState *env); |
| long do_rt_sigreturn(CPUArchState *env); |
| abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp); |
| |
| #ifdef TARGET_I386 |
| /* vm86.c */ |
| void save_v86_state(CPUX86State *env); |
| void handle_vm86_trap(CPUX86State *env, int trapno); |
| void handle_vm86_fault(CPUX86State *env); |
| int do_vm86(CPUX86State *env, long subfunction, abi_ulong v86_addr); |
| #elif defined(TARGET_SPARC64) |
| void sparc64_set_context(CPUSPARCState *env); |
| void sparc64_get_context(CPUSPARCState *env); |
| #endif |
| |
| /* mmap.c */ |
| int target_mprotect(abi_ulong start, abi_ulong len, int prot); |
| abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, |
| int flags, int fd, abi_ulong offset); |
| int target_munmap(abi_ulong start, abi_ulong len); |
| abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size, |
| abi_ulong new_size, unsigned long flags, |
| abi_ulong new_addr); |
| int target_msync(abi_ulong start, abi_ulong len, int flags); |
| extern unsigned long last_brk; |
| extern abi_ulong mmap_next_start; |
| void mmap_lock(void); |
| void mmap_unlock(void); |
| abi_ulong mmap_find_vma(abi_ulong, abi_ulong); |
| void cpu_list_lock(void); |
| void cpu_list_unlock(void); |
| #if defined(CONFIG_USE_NPTL) |
| void mmap_fork_start(void); |
| void mmap_fork_end(int child); |
| #endif |
| |
| /* main.c */ |
| extern unsigned long guest_stack_size; |
| |
| /* user access */ |
| |
| #define VERIFY_READ 0 |
| #define VERIFY_WRITE 1 /* implies read access */ |
| |
| static inline int access_ok(int type, abi_ulong addr, abi_ulong size) |
| { |
| return page_check_range((target_ulong)addr, size, |
| (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; |
| } |
| |
| /* NOTE __get_user and __put_user use host pointers and don't check access. |
| These are usually used to access struct data members once the struct has |
| been locked - usually with lock_user_struct. */ |
| |
| /* Tricky points: |
| - Use __builtin_choose_expr to avoid type promotion from ?:, |
| - Invalid sizes result in a compile time error stemming from |
| the fact that abort has no parameters. |
| - It's easier to use the endian-specific unaligned load/store |
| functions than host-endian unaligned load/store plus tswapN. */ |
| |
| #define __put_user_e(x, hptr, e) \ |
| (__builtin_choose_expr(sizeof(*(hptr)) == 1, stb_p, \ |
| __builtin_choose_expr(sizeof(*(hptr)) == 2, stw_##e##_p, \ |
| __builtin_choose_expr(sizeof(*(hptr)) == 4, stl_##e##_p, \ |
| __builtin_choose_expr(sizeof(*(hptr)) == 8, stq_##e##_p, abort)))) \ |
| ((hptr), (x)), 0) |
| |
| #define __get_user_e(x, hptr, e) \ |
| ((x) = (typeof(*hptr))( \ |
| __builtin_choose_expr(sizeof(*(hptr)) == 1, ldub_p, \ |
| __builtin_choose_expr(sizeof(*(hptr)) == 2, lduw_##e##_p, \ |
| __builtin_choose_expr(sizeof(*(hptr)) == 4, ldl_##e##_p, \ |
| __builtin_choose_expr(sizeof(*(hptr)) == 8, ldq_##e##_p, abort)))) \ |
| (hptr)), 0) |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| # define __put_user(x, hptr) __put_user_e(x, hptr, be) |
| # define __get_user(x, hptr) __get_user_e(x, hptr, be) |
| #else |
| # define __put_user(x, hptr) __put_user_e(x, hptr, le) |
| # define __get_user(x, hptr) __get_user_e(x, hptr, le) |
| #endif |
| |
| /* put_user()/get_user() take a guest address and check access */ |
| /* These are usually used to access an atomic data type, such as an int, |
| * that has been passed by address. These internally perform locking |
| * and unlocking on the data type. |
| */ |
| #define put_user(x, gaddr, target_type) \ |
| ({ \ |
| abi_ulong __gaddr = (gaddr); \ |
| target_type *__hptr; \ |
| abi_long __ret; \ |
| if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ |
| __ret = __put_user((x), __hptr); \ |
| unlock_user(__hptr, __gaddr, sizeof(target_type)); \ |
| } else \ |
| __ret = -TARGET_EFAULT; \ |
| __ret; \ |
| }) |
| |
| #define get_user(x, gaddr, target_type) \ |
| ({ \ |
| abi_ulong __gaddr = (gaddr); \ |
| target_type *__hptr; \ |
| abi_long __ret; \ |
| if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ |
| __ret = __get_user((x), __hptr); \ |
| unlock_user(__hptr, __gaddr, 0); \ |
| } else { \ |
| /* avoid warning */ \ |
| (x) = 0; \ |
| __ret = -TARGET_EFAULT; \ |
| } \ |
| __ret; \ |
| }) |
| |
| #define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong) |
| #define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long) |
| #define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t) |
| #define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t) |
| #define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t) |
| #define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t) |
| #define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t) |
| #define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t) |
| #define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t) |
| #define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t) |
| |
| #define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong) |
| #define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long) |
| #define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t) |
| #define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t) |
| #define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t) |
| #define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t) |
| #define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t) |
| #define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t) |
| #define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t) |
| #define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t) |
| |
| /* copy_from_user() and copy_to_user() are usually used to copy data |
| * buffers between the target and host. These internally perform |
| * locking/unlocking of the memory. |
| */ |
| abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len); |
| abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len); |
| |
| /* Functions for accessing guest memory. The tget and tput functions |
| read/write single values, byteswapping as necessary. The lock_user |
| gets a pointer to a contiguous area of guest memory, but does not perform |
| and byteswapping. lock_user may return either a pointer to the guest |
| memory, or a temporary buffer. */ |
| |
| /* Lock an area of guest memory into the host. If copy is true then the |
| host area will have the same contents as the guest. */ |
| static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy) |
| { |
| if (!access_ok(type, guest_addr, len)) |
| return NULL; |
| #ifdef DEBUG_REMAP |
| { |
| void *addr; |
| addr = malloc(len); |
| if (copy) |
| memcpy(addr, g2h(guest_addr), len); |
| else |
| memset(addr, 0, len); |
| return addr; |
| } |
| #else |
| return g2h(guest_addr); |
| #endif |
| } |
| |
| /* Unlock an area of guest memory. The first LEN bytes must be |
| flushed back to guest memory. host_ptr = NULL is explicitly |
| allowed and does nothing. */ |
| static inline void unlock_user(void *host_ptr, abi_ulong guest_addr, |
| long len) |
| { |
| |
| #ifdef DEBUG_REMAP |
| if (!host_ptr) |
| return; |
| if (host_ptr == g2h(guest_addr)) |
| return; |
| if (len > 0) |
| memcpy(g2h(guest_addr), host_ptr, len); |
| free(host_ptr); |
| #endif |
| } |
| |
| /* Return the length of a string in target memory or -TARGET_EFAULT if |
| access error. */ |
| abi_long target_strlen(abi_ulong gaddr); |
| |
| /* Like lock_user but for null terminated strings. */ |
| static inline void *lock_user_string(abi_ulong guest_addr) |
| { |
| abi_long len; |
| len = target_strlen(guest_addr); |
| if (len < 0) |
| return NULL; |
| return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1); |
| } |
| |
| /* Helper macros for locking/ulocking a target struct. */ |
| #define lock_user_struct(type, host_ptr, guest_addr, copy) \ |
| (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy)) |
| #define unlock_user_struct(host_ptr, guest_addr, copy) \ |
| unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) |
| |
| #if defined(CONFIG_USE_NPTL) |
| #include <pthread.h> |
| #endif |
| |
| #endif /* QEMU_H */ |