diff options
Diffstat (limited to 'linux-user/qemu.h')
| -rw-r--r-- | linux-user/qemu.h | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/linux-user/qemu.h b/linux-user/qemu.h new file mode 100644 index 0000000..218e846 --- /dev/null +++ b/linux-user/qemu.h @@ -0,0 +1,308 @@ +#ifndef QEMU_H +#define QEMU_H + +#include "thunk.h" + +#include <signal.h> +#include <string.h> +#include "syscall_defs.h" + +#include "cpu.h" +#include "syscall.h" +#include "gdbstub.h" + +/* 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 { + unsigned long start_code; + unsigned long end_code; + unsigned long start_data; + unsigned long end_data; + unsigned long start_brk; + unsigned long brk; + unsigned long start_mmap; + unsigned long mmap; + unsigned long rss; + unsigned long start_stack; + unsigned long entry; + target_ulong code_offset; + target_ulong data_offset; + int personality; +}; + +#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 + +/* NOTE: we force a big alignment so that the stack stored after is + aligned too */ +typedef struct TaskState { + struct TaskState *next; +#ifdef TARGET_ARM + /* FPA state */ + FPA11 fpa; + /* Extra fields for semihosted binaries. */ + uint32_t stack_base; + uint32_t heap_base; + uint32_t heap_limit; + int swi_errno; +#endif +#ifdef TARGET_I386 + target_ulong target_v86; + struct vm86_saved_state vm86_saved_regs; + struct target_vm86plus_struct vm86plus; + uint32_t v86flags; + uint32_t v86mask; +#endif + int used; /* non zero if used */ + struct image_info *info; + uint8_t stack[0]; +} __attribute__((aligned(16))) TaskState; + +extern TaskState *first_task_state; +extern const char *qemu_uname_release; + +/* ??? 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 32 + +/* + * This structure is used to hold the arguments that are + * used when loading binaries. + */ +struct linux_binprm { + char buf[128]; + void *page[MAX_ARG_PAGES]; + unsigned long p; + int fd; + int e_uid, e_gid; + int argc, envc; + char **argv; + char **envp; + char * filename; /* Name of binary */ +}; + +void do_init_thread(struct target_pt_regs *regs, struct image_info *infop); +target_ulong loader_build_argptr(int envc, int argc, target_ulong sp, + target_ulong stringp, int push_ptr); +int loader_exec(const char * filename, char ** argv, char ** envp, + struct target_pt_regs * regs, struct image_info *infop); + +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); + +void memcpy_to_target(target_ulong dest, const void *src, + unsigned long len); +void target_set_brk(target_ulong new_brk); +long do_brk(target_ulong new_brk); +void syscall_init(void); +long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3, + long arg4, long arg5, long arg6); +void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2))); +extern CPUState *global_env; +void cpu_loop(CPUState *env); +void init_paths(const char *prefix); +const char *path(const char *pathname); + +extern int loglevel; +extern FILE *logfile; + +/* signal.c */ +void process_pending_signals(void *cpu_env); +void signal_init(void); +int queue_signal(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); +long do_sigreturn(CPUState *env); +long do_rt_sigreturn(CPUState *env); + +#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, target_ulong v86_addr); +#endif + +/* mmap.c */ +int target_mprotect(target_ulong start, target_ulong len, int prot); +long target_mmap(target_ulong start, target_ulong len, int prot, + int flags, int fd, target_ulong offset); +int target_munmap(target_ulong start, target_ulong len); +long target_mremap(target_ulong old_addr, target_ulong old_size, + target_ulong new_size, unsigned long flags, + target_ulong new_addr); +int target_msync(target_ulong start, target_ulong len, int flags); + +/* user access */ + +#define VERIFY_READ 0 +#define VERIFY_WRITE 1 + +#define access_ok(type,addr,size) (1) + +/* NOTE get_user and put_user use host addresses. */ +#define __put_user(x,ptr)\ +({\ + int size = sizeof(*ptr);\ + switch(size) {\ + case 1:\ + *(uint8_t *)(ptr) = (typeof(*ptr))(x);\ + break;\ + case 2:\ + *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\ + break;\ + case 4:\ + *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\ + break;\ + case 8:\ + *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\ + break;\ + default:\ + abort();\ + }\ + 0;\ +}) + +#define __get_user(x, ptr) \ +({\ + int size = sizeof(*ptr);\ + switch(size) {\ + case 1:\ + x = (typeof(*ptr))*(uint8_t *)(ptr);\ + break;\ + case 2:\ + x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\ + break;\ + case 4:\ + x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\ + break;\ + case 8:\ + x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\ + break;\ + default:\ + abort();\ + }\ + 0;\ +}) + +#define put_user(x,ptr)\ +({\ + int __ret;\ + if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\ + __ret = __put_user(x, ptr);\ + else\ + __ret = -EFAULT;\ + __ret;\ +}) + +#define get_user(x,ptr)\ +({\ + int __ret;\ + if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\ + __ret = __get_user(x, ptr);\ + else\ + __ret = -EFAULT;\ + __ret;\ +}) + +/* Functions for accessing guest memory. The tget and tput functions + read/write single values, byteswapping as neccessary. 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(target_ulong guest_addr, long len, int copy) +{ +#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. */ +static inline void unlock_user(void *host_addr, target_ulong guest_addr, + long len) +{ +#ifdef DEBUG_REMAP + if (host_addr == g2h(guest_addr)) + return; + if (len > 0) + memcpy(g2h(guest_addr), host_addr, len); + free(host_addr); +#endif +} + +/* Return the length of a string in target memory. */ +static inline int target_strlen(target_ulong ptr) +{ + return strlen(g2h(ptr)); +} + +/* Like lock_user but for null terminated strings. */ +static inline void *lock_user_string(target_ulong guest_addr) +{ + long len; + len = target_strlen(guest_addr) + 1; + return lock_user(guest_addr, len, 1); +} + +/* Helper macros for locking/ulocking a target struct. */ +#define lock_user_struct(host_ptr, guest_addr, copy) \ + host_ptr = lock_user(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) + +#define tget8(addr) ldub(addr) +#define tput8(addr, val) stb(addr, val) +#define tget16(addr) lduw(addr) +#define tput16(addr, val) stw(addr, val) +#define tget32(addr) ldl(addr) +#define tput32(addr, val) stl(addr, val) +#define tget64(addr) ldq(addr) +#define tput64(addr, val) stq(addr, val) +#if TARGET_LONG_BITS == 64 +#define tgetl(addr) ldq(addr) +#define tputl(addr, val) stq(addr, val) +#else +#define tgetl(addr) ldl(addr) +#define tputl(addr, val) stl(addr, val) +#endif + +#endif /* QEMU_H */ |