diff options
Diffstat (limited to 'src/linux-user/qemu.h')
| -rw-r--r-- | src/linux-user/qemu.h | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/src/linux-user/qemu.h b/src/linux-user/qemu.h new file mode 100644 index 0000000..bd90cc3 --- /dev/null +++ b/src/linux-user/qemu.h @@ -0,0 +1,447 @@ +#ifndef QEMU_H +#define QEMU_H + +#include <signal.h> +#include <string.h> + +#include "cpu.h" +#include "exec/cpu_ldst.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 "exec/gdbstub.h" +#include "qemu/queue.h" + +#define THREAD __thread + +/* 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 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 + +#if defined(TARGET_ARM) && defined(TARGET_ABI32) +/* 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 +# ifdef TARGET_ABI32 + /* FPA state */ + FPA11 fpa; +# endif + 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 + abi_ulong child_tidptr; +#ifdef TARGET_M68K + int sim_syscalls; + abi_ulong tp_value; +#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 */ + bool sigsegv_blocked; /* SIGSEGV blocked by guest */ + 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. */ + +/* 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)); + 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(int fdexec, 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 image_info *info); +int load_flt_binary(struct linux_binprm *bprm, 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 init_qemu_uname_release(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); +int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset); + +#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; +abi_ulong mmap_find_vma(abi_ulong, abi_ulong); +void cpu_list_lock(void); +void cpu_list_unlock(void); +void mmap_fork_start(void); +void mmap_fork_end(int child); + +/* 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)), (void)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)), (void)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 = 0; \ + if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \ + __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 = 0; \ + if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \ + __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 function + gets a pointer to a contiguous area of guest memory, but does not perform + any 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/unlocking 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) + +#include <pthread.h> + +/* Include target-specific struct and function definitions; + * they may need access to the target-independent structures + * above, so include them last. + */ +#include "target_cpu.h" +#include "target_signal.h" +#include "target_structs.h" + +#endif /* QEMU_H */ |
