309 lines
8.4 KiB
C
309 lines
8.4 KiB
C
#ifndef QEMU_H
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#define QEMU_H
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#include "thunk.h"
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#include <signal.h>
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#include <string.h>
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#include "syscall_defs.h"
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#include "cpu.h"
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#include "syscall.h"
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#include "gdbstub.h"
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/* This struct is used to hold certain information about the image.
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* Basically, it replicates in user space what would be certain
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* task_struct fields in the kernel
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*/
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struct image_info {
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unsigned long start_code;
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unsigned long end_code;
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unsigned long start_data;
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unsigned long end_data;
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unsigned long start_brk;
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unsigned long brk;
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unsigned long start_mmap;
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unsigned long mmap;
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unsigned long rss;
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unsigned long start_stack;
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unsigned long entry;
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target_ulong code_offset;
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target_ulong data_offset;
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int personality;
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};
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#ifdef TARGET_I386
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/* Information about the current linux thread */
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struct vm86_saved_state {
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uint32_t eax; /* return code */
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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uint32_t esi;
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uint32_t edi;
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uint32_t ebp;
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uint32_t esp;
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uint32_t eflags;
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uint32_t eip;
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uint16_t cs, ss, ds, es, fs, gs;
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};
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#endif
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#ifdef TARGET_ARM
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/* FPU emulator */
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#include "nwfpe/fpa11.h"
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#endif
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/* NOTE: we force a big alignment so that the stack stored after is
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aligned too */
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typedef struct TaskState {
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struct TaskState *next;
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#ifdef TARGET_ARM
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/* FPA state */
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FPA11 fpa;
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/* Extra fields for semihosted binaries. */
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uint32_t stack_base;
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uint32_t heap_base;
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uint32_t heap_limit;
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int swi_errno;
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#endif
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#ifdef TARGET_I386
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target_ulong target_v86;
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struct vm86_saved_state vm86_saved_regs;
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struct target_vm86plus_struct vm86plus;
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uint32_t v86flags;
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uint32_t v86mask;
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#endif
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int used; /* non zero if used */
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struct image_info *info;
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uint8_t stack[0];
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} __attribute__((aligned(16))) TaskState;
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extern TaskState *first_task_state;
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extern const char *qemu_uname_release;
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/* ??? See if we can avoid exposing so much of the loader internals. */
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/*
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* MAX_ARG_PAGES defines the number of pages allocated for arguments
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* and envelope for the new program. 32 should suffice, this gives
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* a maximum env+arg of 128kB w/4KB pages!
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*/
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#define MAX_ARG_PAGES 32
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/*
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* This structure is used to hold the arguments that are
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* used when loading binaries.
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*/
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struct linux_binprm {
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char buf[128];
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void *page[MAX_ARG_PAGES];
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unsigned long p;
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int fd;
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int e_uid, e_gid;
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int argc, envc;
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char **argv;
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char **envp;
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char * filename; /* Name of binary */
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};
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void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
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target_ulong loader_build_argptr(int envc, int argc, target_ulong sp,
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target_ulong stringp, int push_ptr);
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int loader_exec(const char * filename, char ** argv, char ** envp,
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struct target_pt_regs * regs, struct image_info *infop);
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int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
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struct image_info * info);
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int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
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struct image_info * info);
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void memcpy_to_target(target_ulong dest, const void *src,
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unsigned long len);
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void target_set_brk(target_ulong new_brk);
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long do_brk(target_ulong new_brk);
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void syscall_init(void);
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long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
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long arg4, long arg5, long arg6);
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void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
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extern CPUState *global_env;
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void cpu_loop(CPUState *env);
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void init_paths(const char *prefix);
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const char *path(const char *pathname);
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extern int loglevel;
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extern FILE *logfile;
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/* signal.c */
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void process_pending_signals(void *cpu_env);
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void signal_init(void);
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int queue_signal(int sig, target_siginfo_t *info);
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void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
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void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
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long do_sigreturn(CPUState *env);
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long do_rt_sigreturn(CPUState *env);
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#ifdef TARGET_I386
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/* vm86.c */
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void save_v86_state(CPUX86State *env);
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void handle_vm86_trap(CPUX86State *env, int trapno);
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void handle_vm86_fault(CPUX86State *env);
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int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr);
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#endif
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/* mmap.c */
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int target_mprotect(target_ulong start, target_ulong len, int prot);
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long target_mmap(target_ulong start, target_ulong len, int prot,
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int flags, int fd, target_ulong offset);
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int target_munmap(target_ulong start, target_ulong len);
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long target_mremap(target_ulong old_addr, target_ulong old_size,
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target_ulong new_size, unsigned long flags,
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target_ulong new_addr);
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int target_msync(target_ulong start, target_ulong len, int flags);
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/* user access */
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#define VERIFY_READ 0
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#define VERIFY_WRITE 1
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#define access_ok(type,addr,size) (1)
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/* NOTE get_user and put_user use host addresses. */
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#define __put_user(x,ptr)\
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({\
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int size = sizeof(*ptr);\
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switch(size) {\
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case 1:\
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*(uint8_t *)(ptr) = (typeof(*ptr))(x);\
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break;\
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case 2:\
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*(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\
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break;\
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case 4:\
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*(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\
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break;\
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case 8:\
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*(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\
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break;\
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default:\
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abort();\
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}\
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0;\
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})
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#define __get_user(x, ptr) \
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({\
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int size = sizeof(*ptr);\
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switch(size) {\
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case 1:\
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x = (typeof(*ptr))*(uint8_t *)(ptr);\
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break;\
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case 2:\
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x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\
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break;\
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case 4:\
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x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\
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break;\
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case 8:\
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x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\
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break;\
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default:\
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abort();\
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}\
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0;\
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})
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#define put_user(x,ptr)\
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({\
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int __ret;\
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if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\
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__ret = __put_user(x, ptr);\
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else\
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__ret = -EFAULT;\
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__ret;\
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})
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#define get_user(x,ptr)\
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({\
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int __ret;\
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if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\
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__ret = __get_user(x, ptr);\
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else\
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__ret = -EFAULT;\
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__ret;\
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})
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/* Functions for accessing guest memory. The tget and tput functions
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read/write single values, byteswapping as neccessary. The lock_user
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gets a pointer to a contiguous area of guest memory, but does not perform
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and byteswapping. lock_user may return either a pointer to the guest
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memory, or a temporary buffer. */
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/* Lock an area of guest memory into the host. If copy is true then the
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host area will have the same contents as the guest. */
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static inline void *lock_user(target_ulong guest_addr, long len, int copy)
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{
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#ifdef DEBUG_REMAP
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void *addr;
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addr = malloc(len);
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if (copy)
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memcpy(addr, g2h(guest_addr), len);
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else
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memset(addr, 0, len);
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return addr;
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#else
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return g2h(guest_addr);
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#endif
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}
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/* Unlock an area of guest memory. The first LEN bytes must be flushed back
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to guest memory. */
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static inline void unlock_user(void *host_addr, target_ulong guest_addr,
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long len)
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{
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#ifdef DEBUG_REMAP
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if (host_addr == g2h(guest_addr))
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return;
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if (len > 0)
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memcpy(g2h(guest_addr), host_addr, len);
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free(host_addr);
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#endif
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}
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/* Return the length of a string in target memory. */
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static inline int target_strlen(target_ulong ptr)
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{
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return strlen(g2h(ptr));
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}
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/* Like lock_user but for null terminated strings. */
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static inline void *lock_user_string(target_ulong guest_addr)
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{
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long len;
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len = target_strlen(guest_addr) + 1;
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return lock_user(guest_addr, len, 1);
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}
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/* Helper macros for locking/ulocking a target struct. */
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#define lock_user_struct(host_ptr, guest_addr, copy) \
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host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)
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#define unlock_user_struct(host_ptr, guest_addr, copy) \
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unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
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#define tget8(addr) ldub(addr)
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#define tput8(addr, val) stb(addr, val)
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#define tget16(addr) lduw(addr)
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#define tput16(addr, val) stw(addr, val)
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#define tget32(addr) ldl(addr)
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#define tput32(addr, val) stl(addr, val)
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#define tget64(addr) ldq(addr)
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#define tput64(addr, val) stq(addr, val)
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#if TARGET_LONG_BITS == 64
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#define tgetl(addr) ldq(addr)
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#define tputl(addr, val) stq(addr, val)
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#else
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#define tgetl(addr) ldl(addr)
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#define tputl(addr, val) stl(addr, val)
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#endif
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#endif /* QEMU_H */
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