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#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h> /* For SYS_xxx definitions */
#include <unistd.h>
#include <time.h>
#include <sys/mman.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <asm/stat.h>
#include <errno.h>
#include <sched.h>
#include <sys/wait.h>
#include <sys/utsname.h>
#ifndef __NR_socketcall
#include <linux/net.h>
#include <sys/socket.h>
#endif
#include <sys/resource.h>
#include <poll.h>
#include "debug.h"
#include "box64stack.h"
#include "x64emu.h"
#include "x64emu_private.h"
#include "x64trace.h"
#include "myalign.h"
#include "box64context.h"
#include "callback.h"
#include "signals.h"
#include "x64tls.h"
// Syscall table for x86_64 can be found
typedef struct scwrap_s {
uint32_t x86s;
int nats;
int nbpars;
} scwrap_t;
static const scwrap_t syscallwrap[] = {
//{ 2, __NR_fork, 1 },
//{ 3, __NR_read, 3 }, // wrapped so SA_RESTART can be handled by libc
//{ 4, __NR_write, 3 }, // same
//{ 5, __NR_open, 3 }, // flags need transformation
//{ 6, __NR_close, 1 }, // wrapped so SA_RESTART can be handled by libc
//{ 7, __NR_waitpid, 3 },
//{ 10, __NR_unlink, 1 },
//{ 12, __NR_chdir, 1 },
//{ 13, __NR_time, 1 },
//{ 15, __NR_chmod, 2 },
//{ 19, __NR_lseek, 3 },
//{ 20, __NR_getpid, 0 },
//{ 24, __NR_getuid, 0 },
//{ 33, __NR_access, 2 },
//{ 37, __NR_kill, 2 },
//{ 38, __NR_rename, 2 },
//{ 39, __NR_mkdir, 2 },
//{ 40, __NR_rmdir, 1 },
//{ 41, __NR_dup, 1 },
//{ 42, __NR_pipe, 1 },
//{ 45, __NR_brk, 1 },
//{ 47, __NR_getgid, 0 },
//{ 49, __NR_geteuid, 0 },
//{ 50, __NR_getegid, 0 },
//{ 54, __NR_ioctl, 3 }, // should be wrapped to allow SA_RESTART handling by libc, but syscall is only 3 arguments, ioctl can be 5
//{ 55, __NR_fcntl, 3 }, // wrapped to allow filter of F_SETFD
//{ 60, __NR_umask, 1 },
//{ 63, __NR_dup2, 2 },
//{ 64, __NR_getppid, 0 },
//{ 66, __NR_setsid, 0 },
//{ 75, __NR_setrlimit, 2 },
//{ 76, __NR_getrlimit, 2 },
//{ 77, __NR_getrusage, 2 },
//{ 78, __NR_gettimeofday, 2 },
//{ 83, __NR_symlink, 2 },
//{ 82, __NR_select, 5 },
//{ 85, __NR_readlink, 3 },
//{ 91, __NR_munmap, 2 },
//{ 94, __NR_fchmod, 2 },
//{ 99, __NR_statfs, 2 },
//{ 102, __NR_socketcall, 2 },
//{ 104, __NR_setitimer, 3 },
//{ 105, __NR_getitimer, 2 },
//{ 106, __NR_newstat, 2 },
//{ 106, __NR_stat, 2 },
//{ 107, __NR_newlstat, 2 },
//{ 107, __NR_lstat, 2 },
//{ 108, __NR_newfstat, 2 },
//{ 108, __NR_fstat, 2 },
//{ 109, __NR_olduname, 1 },
//{ 110, __NR_iopl, 1 },
//{ 114, __NR_wait4, 4 }, //TODO: check struct rusage alignment
//{ 117, __NR_ipc, 6 },
//{ 119, __NR_sigreturn, 0},
//{ 120, __NR_clone, 5 }, // need works
//{ 122, __NR_uname, 1 },
//{ 123, __NR_modify_ldt },
//{ 125, __NR_mprotect, 3 },
//{ 136, __NR_personality, 1 },
//{ 140, __NR__llseek, 5 },
//{ 141, __NR_getdents, 3 },
//{ 142, __NR__newselect, 5 },
//{ 143, __NR_flock, 2 },
//{ 144, __NR_msync, 3 },
//{ 145, __NR_readv, 3 },
//{ 146, __NR_writev, 3 },
//{ 148, __NR_fdatasync, 1 },
//{ 149, __NR__sysctl, 1 }, // need wrapping?
//{ 156, __NR_sched_setscheduler, 3 },
//{ 157, __NR_sched_getscheduler, 1 },
//{ 158, __NR_sched_yield, 0 },
//{ 162, __NR_nanosleep, 2 },
//{ 164, __NR_setresuid, 3 },
//{ 168, __NR_poll, 3 }, // wrapped to allow SA_RESTART wrapping by libc
//{ 172, __NR_prctl, 5 },
//{ 173, __NR_rt_sigreturn, 0 },
//{ 175, __NR_rt_sigprocmask, 4 },
//{ 179, __NR_rt_sigsuspend, 2 },
//{ 183, __NR_getcwd, 2 },
//{ 184, __NR_capget, 2},
//{ 185, __NR_capset, 2},
//{ 186, __NR_sigaltstack, 2 }, // neeed wrap or something?
//{ 191, __NR_ugetrlimit, 2 },
//{ 192, __NR_mmap2, 6},
//{ 195, __NR_stat64, 2 }, // need proprer wrap because of structure size change
//{ 196, __NR_lstat64, 2 }, // need proprer wrap because of structure size change
//{ 197, __NR_fstat64, 2 }, // need proprer wrap because of structure size change
//{ 199, __NR_getuid32, 0 },
//{ 200, __NR_getgid32, 0 },
//{ 201, __NR_geteuid32, 0 },
//{ 202, __NR_getegid32, 0 },
//{ 208, __NR_setresuid32, 3 },
//{ 209, __NR_getresuid32, 3 },
//{ 210, __NR_setresgid32, 3 },
//{ 211, __NR_getresgid32, 3 },
//{ 220, __NR_getdents64, 3 },
//{ 221, __NR_fcntl64, 3 },
{ 224, __NR_gettid, 0 },
//{ 240, __NR_futex, 6 },
//{ 241, __NR_sched_setaffinity, 3 },
//{ 242, __NR_sched_getaffinity, 3 },
//{ 252, __NR_exit_group, 1 },
//{ 254, __NR_epoll_create, 1 },
//{ 255, __NR_epoll_ctl, 4 },
//{ 256, __NR_epoll_wait, 4 },
//{ 265, __NR_clock_gettime, 2 },
//{ 266, __NR_clock_getres, 2 },
//{ 270, __NR_tgkill, 3 },
//{ 271, __NR_utimes, 2 },
//{ 291, __NR_inotify_init, 0},
//{ 292, __NR_inotify_add_watch, 3},
//{ 293, __NR_inotify_rm_watch, 2},
//{ 311, __NR_set_robust_list, 2 },
//{ 312, __NR_get_robust_list, 4 },
//{ 318, __NR_getcpu, 3},
//{ 328, __NR_eventfd2, 2},
//{ 329, __NR_epoll_create1, 1 },
//{ 331, __NR_pipe2, 2},
//{ 332, __NR_inotify_init1, 1},
//{ 355, __NR_getrandom, 3 },
//{ 356, __NR_memfd_create, 2},
//{ 449, __NR_futex_waitv, 5},
};
struct mmap_arg_struct {
unsigned long addr;
unsigned long len;
unsigned long prot;
unsigned long flags;
unsigned long fd;
unsigned long offset;
};
#undef st_atime
#undef st_ctime
#undef st_mtime
struct x64_pt_regs {
long ebx;
long ecx;
long edx;
long esi;
long edi;
long ebp;
long eax;
int xds;
int xes;
int xfs;
int xgs;
long orig_eax;
long eip;
int xcs;
long eflags;
long esp;
int xss;
};
#ifndef __NR_olduname
struct oldold_utsname {
char sysname[9];
char nodename[9];
char release[9];
char version[9];
char machine[9];
};
#endif
struct old_utsname {
char sysname[65];
char nodename[65];
char release[65];
char version[65];
char machine[65];
};
struct i386_user_desc {
unsigned int entry_number;
unsigned long base_addr;
unsigned int limit;
unsigned int seg_32bit:1;
unsigned int contents:2;
unsigned int read_exec_only:1;
unsigned int limit_in_pages:1;
unsigned int seg_not_present:1;
unsigned int useable:1;
};
void EXPORT x86Syscall(x64emu_t *emu)
{
uint32_t s = R_EAX;
printf_log(LOG_DEBUG, "%p: Calling 32bits syscall 0x%02X (%d) %p %p %p %p %p", (void*)R_RIP, s, s, (void*)(uintptr_t)R_EBX, (void*)(uintptr_t)R_ECX, (void*)(uintptr_t)R_EDX, (void*)(uintptr_t)R_ESI, (void*)(uintptr_t)R_EDI);
// check wrapper first
int cnt = sizeof(syscallwrap) / sizeof(scwrap_t);
for (int i=0; i<cnt; i++) {
if(syscallwrap[i].x86s == s) {
int sc = syscallwrap[i].nats;
switch(syscallwrap[i].nbpars) {
case 0: *(int32_t*)&R_EAX = syscall(sc); break;
case 1: *(int32_t*)&R_EAX = syscall(sc, R_EBX); break;
case 2: *(int32_t*)&R_EAX = syscall(sc, R_EBX, R_ECX); break;
case 3: *(int32_t*)&R_EAX = syscall(sc, R_EBX, R_ECX, R_EDX); break;
case 4: *(int32_t*)&R_EAX = syscall(sc, R_EBX, R_ECX, R_EDX, R_ESI); break;
case 5: *(int32_t*)&R_EAX = syscall(sc, R_EBX, R_ECX, R_EDX, R_ESI, R_EDI); break;
case 6: *(int32_t*)&R_EAX = syscall(sc, R_EBX, R_ECX, R_EDX, R_ESI, R_EDI, R_EBP); break;
default:
printf_log(LOG_NONE, "ERROR, Unimplemented syscall wrapper (%d, %d)\n", s, syscallwrap[i].nbpars);
emu->quit = 1;
return;
}
if(R_EAX==0xffffffff && errno>0)
R_EAX = (uint32_t)-errno;
printf_log(LOG_DEBUG, " => 0x%x\n", R_EAX);
return;
}
}
switch (s) {
case 1: // sys_exit
emu->quit = 1;
emu->exit = 1;
//R_EAX = syscall(__NR_exit, R_EBX); // the syscall should exit only current thread
R_EAX = R_EBX; // faking the syscall here, we don't want to really terminate the thread now
break;
/*case 123: // SYS_modify_ldt
R_EAX = my32_modify_ldt(emu, R_EBX, (thread_area_t*)(uintptr_t)R_ECX, R_EDX);
if(R_EAX==0xffffffff && errno>0)
R_EAX = (uint32_t)-errno;
break;*/
case 243: // set_thread_area
R_EAX = my_set_thread_area_32(emu, (thread_area_32_t*)(uintptr_t)R_EBX);
if(R_EAX==0xffffffff && errno>0)
R_EAX = (uint32_t)-errno;
break;
default:
printf_log(LOG_INFO, "Warning: Unsupported Syscall 0x%02Xh (%d)\n", s, s);
R_EAX = (uint32_t)-ENOSYS;
return;
}
printf_log(LOG_DEBUG, " => 0x%x\n", R_EAX);
}
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