395 lines
14 KiB
C
395 lines
14 KiB
C
#ifndef QEMU_H
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#define QEMU_H
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#include <signal.h>
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#include <string.h>
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#include "cpu.h"
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#undef DEBUG_REMAP
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#ifdef DEBUG_REMAP
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#include <stdlib.h>
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#endif /* DEBUG_REMAP */
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#include "exec/user/abitypes.h"
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enum BSDType {
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target_freebsd,
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target_netbsd,
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target_openbsd,
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};
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extern enum BSDType bsd_type;
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#include "syscall_defs.h"
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#include "syscall.h"
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#include "target_signal.h"
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#include "exec/gdbstub.h"
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#if defined(CONFIG_USE_NPTL)
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#define THREAD __thread
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#else
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#define THREAD
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#endif
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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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abi_ulong load_addr;
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abi_ulong start_code;
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abi_ulong end_code;
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abi_ulong start_data;
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abi_ulong end_data;
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abi_ulong start_brk;
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abi_ulong brk;
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abi_ulong start_mmap;
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abi_ulong mmap;
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abi_ulong rss;
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abi_ulong start_stack;
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abi_ulong entry;
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abi_ulong code_offset;
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abi_ulong data_offset;
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int personality;
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};
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#define MAX_SIGQUEUE_SIZE 1024
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struct sigqueue {
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struct sigqueue *next;
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//target_siginfo_t info;
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};
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struct emulated_sigtable {
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int pending; /* true if signal is pending */
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struct sigqueue *first;
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struct sigqueue info; /* in order to always have memory for the
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first signal, we put it here */
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};
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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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int used; /* non zero if used */
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struct image_info *info;
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struct emulated_sigtable sigtab[TARGET_NSIG];
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struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
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struct sigqueue *first_free; /* first free siginfo queue entry */
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int signal_pending; /* non zero if a signal may be pending */
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uint8_t stack[0];
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} __attribute__((aligned(16))) TaskState;
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void init_task_state(TaskState *ts);
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extern const char *qemu_uname_release;
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#if defined(CONFIG_USE_GUEST_BASE)
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extern unsigned long mmap_min_addr;
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#endif
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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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abi_ulong 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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abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
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abi_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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abi_long memcpy_to_target(abi_ulong dest, const void *src,
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unsigned long len);
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void target_set_brk(abi_ulong new_brk);
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abi_long do_brk(abi_ulong new_brk);
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void syscall_init(void);
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abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6, abi_long arg7,
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abi_long arg8);
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abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6);
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abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
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abi_long arg2, abi_long arg3, abi_long arg4,
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abi_long arg5, abi_long arg6);
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void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
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extern THREAD CPUArchState *thread_env;
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void cpu_loop(CPUArchState *env);
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char *target_strerror(int err);
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int get_osversion(void);
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void fork_start(void);
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void fork_end(int child);
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#include "qemu/log.h"
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/* strace.c */
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void
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print_freebsd_syscall(int num,
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abi_long arg1, abi_long arg2, abi_long arg3,
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abi_long arg4, abi_long arg5, abi_long arg6);
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void print_freebsd_syscall_ret(int num, abi_long ret);
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void
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print_netbsd_syscall(int num,
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abi_long arg1, abi_long arg2, abi_long arg3,
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abi_long arg4, abi_long arg5, abi_long arg6);
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void print_netbsd_syscall_ret(int num, abi_long ret);
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void
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print_openbsd_syscall(int num,
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abi_long arg1, abi_long arg2, abi_long arg3,
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abi_long arg4, abi_long arg5, abi_long arg6);
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void print_openbsd_syscall_ret(int num, abi_long ret);
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extern int do_strace;
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/* signal.c */
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void process_pending_signals(CPUArchState *cpu_env);
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void signal_init(void);
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//int queue_signal(CPUArchState *env, 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(CPUArchState *env);
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long do_rt_sigreturn(CPUArchState *env);
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abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
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/* mmap.c */
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int target_mprotect(abi_ulong start, abi_ulong len, int prot);
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abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
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int flags, int fd, abi_ulong offset);
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int target_munmap(abi_ulong start, abi_ulong len);
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abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
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abi_ulong new_size, unsigned long flags,
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abi_ulong new_addr);
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int target_msync(abi_ulong start, abi_ulong len, int flags);
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extern unsigned long last_brk;
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void mmap_lock(void);
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void mmap_unlock(void);
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void cpu_list_lock(void);
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void cpu_list_unlock(void);
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#if defined(CONFIG_USE_NPTL)
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void mmap_fork_start(void);
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void mmap_fork_end(int child);
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#endif
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/* main.c */
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extern unsigned long x86_stack_size;
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/* user access */
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#define VERIFY_READ 0
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#define VERIFY_WRITE 1 /* implies read access */
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static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
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{
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return page_check_range((target_ulong)addr, size,
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(type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
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}
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/* NOTE __get_user and __put_user use host pointers and don't check access. */
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/* These are usually used to access struct data members once the
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* struct has been locked - usually with lock_user_struct().
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*/
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#define __put_user(x, hptr)\
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({\
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int size = sizeof(*hptr);\
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switch(size) {\
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case 1:\
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*(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
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break;\
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case 2:\
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*(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
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break;\
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case 4:\
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*(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
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break;\
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case 8:\
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*(uint64_t *)(hptr) = tswap64((typeof(*hptr))(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, hptr) \
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({\
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int size = sizeof(*hptr);\
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switch(size) {\
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case 1:\
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x = (typeof(*hptr))*(uint8_t *)(hptr);\
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break;\
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case 2:\
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x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
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break;\
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case 4:\
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x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
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break;\
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case 8:\
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x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
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break;\
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default:\
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/* avoid warning */\
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x = 0;\
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abort();\
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}\
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0;\
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})
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/* put_user()/get_user() take a guest address and check access */
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/* These are usually used to access an atomic data type, such as an int,
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* that has been passed by address. These internally perform locking
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* and unlocking on the data type.
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*/
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#define put_user(x, gaddr, target_type) \
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({ \
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abi_ulong __gaddr = (gaddr); \
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target_type *__hptr; \
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abi_long __ret; \
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if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
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__ret = __put_user((x), __hptr); \
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unlock_user(__hptr, __gaddr, sizeof(target_type)); \
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} else \
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__ret = -TARGET_EFAULT; \
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__ret; \
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})
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#define get_user(x, gaddr, target_type) \
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({ \
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abi_ulong __gaddr = (gaddr); \
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target_type *__hptr; \
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abi_long __ret; \
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if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
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__ret = __get_user((x), __hptr); \
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unlock_user(__hptr, __gaddr, 0); \
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} else { \
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/* avoid warning */ \
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(x) = 0; \
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__ret = -TARGET_EFAULT; \
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} \
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__ret; \
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})
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#define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
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#define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
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#define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
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#define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
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#define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
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#define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
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#define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
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#define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
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#define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
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#define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
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#define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
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#define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
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#define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
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#define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
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#define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
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#define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
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#define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
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#define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
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#define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
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#define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
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/* copy_from_user() and copy_to_user() are usually used to copy data
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* buffers between the target and host. These internally perform
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* locking/unlocking of the memory.
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*/
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abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
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abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
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/* Functions for accessing guest memory. The tget and tput functions
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read/write single values, byteswapping as necessary. 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(int type, abi_ulong guest_addr, long len, int copy)
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{
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if (!access_ok(type, guest_addr, len))
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return NULL;
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#ifdef DEBUG_REMAP
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{
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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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}
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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
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flushed back to guest memory. host_ptr = NULL is explicitly
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allowed and does nothing. */
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static inline void unlock_user(void *host_ptr, abi_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_ptr)
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return;
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if (host_ptr == g2h(guest_addr))
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return;
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if (len > 0)
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memcpy(g2h(guest_addr), host_ptr, len);
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free(host_ptr);
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#endif
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}
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/* Return the length of a string in target memory or -TARGET_EFAULT if
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access error. */
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abi_long target_strlen(abi_ulong gaddr);
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/* Like lock_user but for null terminated strings. */
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static inline void *lock_user_string(abi_ulong guest_addr)
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{
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abi_long len;
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len = target_strlen(guest_addr);
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if (len < 0)
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return NULL;
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return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 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(type, host_ptr, guest_addr, copy) \
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(host_ptr = lock_user(type, 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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#if defined(CONFIG_USE_NPTL)
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#include <pthread.h>
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#endif
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#endif /* QEMU_H */
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