mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 09:02:00 +00:00
469 lines
13 KiB
ArmAsm
469 lines
13 KiB
ArmAsm
#include <asm/asmmacro.h>
|
|
#include <asm/ia32.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/signal.h>
|
|
#include <asm/thread_info.h>
|
|
|
|
#include "../kernel/minstate.h"
|
|
|
|
/*
|
|
* execve() is special because in case of success, we need to
|
|
* setup a null register window frame (in case an IA-32 process
|
|
* is exec'ing an IA-64 program).
|
|
*/
|
|
ENTRY(ia32_execve)
|
|
.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(3)
|
|
alloc loc1=ar.pfs,3,2,4,0
|
|
mov loc0=rp
|
|
.body
|
|
zxt4 out0=in0 // filename
|
|
;; // stop bit between alloc and call
|
|
zxt4 out1=in1 // argv
|
|
zxt4 out2=in2 // envp
|
|
add out3=16,sp // regs
|
|
br.call.sptk.few rp=sys32_execve
|
|
1: cmp.ge p6,p0=r8,r0
|
|
mov ar.pfs=loc1 // restore ar.pfs
|
|
;;
|
|
(p6) mov ar.pfs=r0 // clear ar.pfs in case of success
|
|
sxt4 r8=r8 // return 64-bit result
|
|
mov rp=loc0
|
|
br.ret.sptk.few rp
|
|
END(ia32_execve)
|
|
|
|
ENTRY(ia32_clone)
|
|
.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(5)
|
|
alloc r16=ar.pfs,5,2,6,0
|
|
DO_SAVE_SWITCH_STACK
|
|
mov loc0=rp
|
|
mov loc1=r16 // save ar.pfs across do_fork
|
|
.body
|
|
zxt4 out1=in1 // newsp
|
|
mov out3=16 // stacksize (compensates for 16-byte scratch area)
|
|
adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = ®s
|
|
mov out0=in0 // out0 = clone_flags
|
|
zxt4 out4=in2 // out4 = parent_tidptr
|
|
zxt4 out5=in4 // out5 = child_tidptr
|
|
br.call.sptk.many rp=do_fork
|
|
.ret0: .restore sp
|
|
adds sp=IA64_SWITCH_STACK_SIZE,sp // pop the switch stack
|
|
mov ar.pfs=loc1
|
|
mov rp=loc0
|
|
br.ret.sptk.many rp
|
|
END(ia32_clone)
|
|
|
|
GLOBAL_ENTRY(ia32_ret_from_clone)
|
|
PT_REGS_UNWIND_INFO(0)
|
|
{ /*
|
|
* Some versions of gas generate bad unwind info if the first instruction of a
|
|
* procedure doesn't go into the first slot of a bundle. This is a workaround.
|
|
*/
|
|
nop.m 0
|
|
nop.i 0
|
|
/*
|
|
* We need to call schedule_tail() to complete the scheduling process.
|
|
* Called by ia64_switch_to after do_fork()->copy_thread(). r8 contains the
|
|
* address of the previously executing task.
|
|
*/
|
|
br.call.sptk.many rp=ia64_invoke_schedule_tail
|
|
}
|
|
.ret1:
|
|
adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
|
|
;;
|
|
ld4 r2=[r2]
|
|
;;
|
|
mov r8=0
|
|
and r2=_TIF_SYSCALL_TRACEAUDIT,r2
|
|
;;
|
|
cmp.ne p6,p0=r2,r0
|
|
(p6) br.cond.spnt .ia32_strace_check_retval
|
|
;; // prevent RAW on r8
|
|
END(ia32_ret_from_clone)
|
|
// fall thrugh
|
|
GLOBAL_ENTRY(ia32_ret_from_syscall)
|
|
PT_REGS_UNWIND_INFO(0)
|
|
|
|
cmp.ge p6,p7=r8,r0 // syscall executed successfully?
|
|
adds r2=IA64_PT_REGS_R8_OFFSET+16,sp // r2 = &pt_regs.r8
|
|
;;
|
|
alloc r3=ar.pfs,0,0,0,0 // drop the syscall argument frame
|
|
st8 [r2]=r8 // store return value in slot for r8
|
|
br.cond.sptk.many ia64_leave_kernel
|
|
END(ia32_ret_from_syscall)
|
|
|
|
//
|
|
// Invoke a system call, but do some tracing before and after the call.
|
|
// We MUST preserve the current register frame throughout this routine
|
|
// because some system calls (such as ia64_execve) directly
|
|
// manipulate ar.pfs.
|
|
//
|
|
// Input:
|
|
// r8 = syscall number
|
|
// b6 = syscall entry point
|
|
//
|
|
GLOBAL_ENTRY(ia32_trace_syscall)
|
|
PT_REGS_UNWIND_INFO(0)
|
|
mov r3=-38
|
|
adds r2=IA64_PT_REGS_R8_OFFSET+16,sp
|
|
;;
|
|
st8 [r2]=r3 // initialize return code to -ENOSYS
|
|
br.call.sptk.few rp=syscall_trace_enter // give parent a chance to catch syscall args
|
|
cmp.lt p6,p0=r8,r0 // check tracehook
|
|
adds r2=IA64_PT_REGS_R8_OFFSET+16,sp // r2 = &pt_regs.r8
|
|
;;
|
|
(p6) st8.spill [r2]=r8 // store return value in slot for r8
|
|
(p6) br.spnt.few .ret4
|
|
.ret2: // Need to reload arguments (they may be changed by the tracing process)
|
|
adds r2=IA64_PT_REGS_R1_OFFSET+16,sp // r2 = &pt_regs.r1
|
|
adds r3=IA64_PT_REGS_R13_OFFSET+16,sp // r3 = &pt_regs.r13
|
|
mov r15=IA32_NR_syscalls
|
|
;;
|
|
ld4 r8=[r2],IA64_PT_REGS_R9_OFFSET-IA64_PT_REGS_R1_OFFSET
|
|
movl r16=ia32_syscall_table
|
|
;;
|
|
ld4 r33=[r2],8 // r9 == ecx
|
|
ld4 r37=[r3],16 // r13 == ebp
|
|
cmp.ltu.unc p6,p7=r8,r15
|
|
;;
|
|
ld4 r34=[r2],8 // r10 == edx
|
|
ld4 r36=[r3],8 // r15 == edi
|
|
(p6) shladd r16=r8,3,r16 // force ni_syscall if not valid syscall number
|
|
;;
|
|
ld8 r16=[r16]
|
|
;;
|
|
ld4 r32=[r2],8 // r11 == ebx
|
|
mov b6=r16
|
|
ld4 r35=[r3],8 // r14 == esi
|
|
br.call.sptk.few rp=b6 // do the syscall
|
|
.ia32_strace_check_retval:
|
|
cmp.lt p6,p0=r8,r0 // syscall failed?
|
|
adds r2=IA64_PT_REGS_R8_OFFSET+16,sp // r2 = &pt_regs.r8
|
|
;;
|
|
st8.spill [r2]=r8 // store return value in slot for r8
|
|
br.call.sptk.few rp=syscall_trace_leave // give parent a chance to catch return value
|
|
.ret4: alloc r2=ar.pfs,0,0,0,0 // drop the syscall argument frame
|
|
br.cond.sptk.many ia64_leave_kernel
|
|
END(ia32_trace_syscall)
|
|
|
|
GLOBAL_ENTRY(sys32_vfork)
|
|
alloc r16=ar.pfs,2,2,4,0;;
|
|
mov out0=IA64_CLONE_VFORK|IA64_CLONE_VM|SIGCHLD // out0 = clone_flags
|
|
br.cond.sptk.few .fork1 // do the work
|
|
END(sys32_vfork)
|
|
|
|
GLOBAL_ENTRY(sys32_fork)
|
|
.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
|
|
alloc r16=ar.pfs,2,2,4,0
|
|
mov out0=SIGCHLD // out0 = clone_flags
|
|
;;
|
|
.fork1:
|
|
mov loc0=rp
|
|
mov loc1=r16 // save ar.pfs across do_fork
|
|
DO_SAVE_SWITCH_STACK
|
|
|
|
.body
|
|
|
|
mov out1=0
|
|
mov out3=0
|
|
adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = ®s
|
|
br.call.sptk.few rp=do_fork
|
|
.ret5: .restore sp
|
|
adds sp=IA64_SWITCH_STACK_SIZE,sp // pop the switch stack
|
|
mov ar.pfs=loc1
|
|
mov rp=loc0
|
|
br.ret.sptk.many rp
|
|
END(sys32_fork)
|
|
|
|
.rodata
|
|
.align 8
|
|
.globl ia32_syscall_table
|
|
ia32_syscall_table:
|
|
data8 sys_ni_syscall /* 0 - old "setup(" system call*/
|
|
data8 sys_exit
|
|
data8 sys32_fork
|
|
data8 sys_read
|
|
data8 sys_write
|
|
data8 compat_sys_open /* 5 */
|
|
data8 sys_close
|
|
data8 sys32_waitpid
|
|
data8 sys_creat
|
|
data8 sys_link
|
|
data8 sys_unlink /* 10 */
|
|
data8 ia32_execve
|
|
data8 sys_chdir
|
|
data8 compat_sys_time
|
|
data8 sys_mknod
|
|
data8 sys_chmod /* 15 */
|
|
data8 sys_lchown /* 16-bit version */
|
|
data8 sys_ni_syscall /* old break syscall holder */
|
|
data8 sys_ni_syscall
|
|
data8 sys32_lseek
|
|
data8 sys_getpid /* 20 */
|
|
data8 compat_sys_mount
|
|
data8 sys_oldumount
|
|
data8 sys_setuid /* 16-bit version */
|
|
data8 sys_getuid /* 16-bit version */
|
|
data8 compat_sys_stime /* 25 */
|
|
data8 compat_sys_ptrace
|
|
data8 sys32_alarm
|
|
data8 sys_ni_syscall
|
|
data8 sys_pause
|
|
data8 compat_sys_utime /* 30 */
|
|
data8 sys_ni_syscall /* old stty syscall holder */
|
|
data8 sys_ni_syscall /* old gtty syscall holder */
|
|
data8 sys_access
|
|
data8 sys_nice
|
|
data8 sys_ni_syscall /* 35 */ /* old ftime syscall holder */
|
|
data8 sys_sync
|
|
data8 sys_kill
|
|
data8 sys_rename
|
|
data8 sys_mkdir
|
|
data8 sys_rmdir /* 40 */
|
|
data8 sys_dup
|
|
data8 sys_pipe
|
|
data8 compat_sys_times
|
|
data8 sys_ni_syscall /* old prof syscall holder */
|
|
data8 sys32_brk /* 45 */
|
|
data8 sys_setgid /* 16-bit version */
|
|
data8 sys_getgid /* 16-bit version */
|
|
data8 sys32_signal
|
|
data8 sys_geteuid /* 16-bit version */
|
|
data8 sys_getegid /* 16-bit version */ /* 50 */
|
|
data8 sys_acct
|
|
data8 sys_umount /* recycled never used phys( */
|
|
data8 sys_ni_syscall /* old lock syscall holder */
|
|
data8 compat_sys_ioctl
|
|
data8 compat_sys_fcntl /* 55 */
|
|
data8 sys_ni_syscall /* old mpx syscall holder */
|
|
data8 sys_setpgid
|
|
data8 sys_ni_syscall /* old ulimit syscall holder */
|
|
data8 sys_ni_syscall
|
|
data8 sys_umask /* 60 */
|
|
data8 sys_chroot
|
|
data8 sys_ustat
|
|
data8 sys_dup2
|
|
data8 sys_getppid
|
|
data8 sys_getpgrp /* 65 */
|
|
data8 sys_setsid
|
|
data8 sys32_sigaction
|
|
data8 sys_ni_syscall
|
|
data8 sys_ni_syscall
|
|
data8 sys_setreuid /* 16-bit version */ /* 70 */
|
|
data8 sys_setregid /* 16-bit version */
|
|
data8 sys32_sigsuspend
|
|
data8 compat_sys_sigpending
|
|
data8 sys_sethostname
|
|
data8 compat_sys_setrlimit /* 75 */
|
|
data8 compat_sys_old_getrlimit
|
|
data8 compat_sys_getrusage
|
|
data8 compat_sys_gettimeofday
|
|
data8 compat_sys_settimeofday
|
|
data8 sys32_getgroups16 /* 80 */
|
|
data8 sys32_setgroups16
|
|
data8 sys32_old_select
|
|
data8 sys_symlink
|
|
data8 sys_ni_syscall
|
|
data8 sys_readlink /* 85 */
|
|
data8 sys_uselib
|
|
data8 sys_swapon
|
|
data8 sys_reboot
|
|
data8 compat_sys_old_readdir
|
|
data8 sys32_mmap /* 90 */
|
|
data8 sys32_munmap
|
|
data8 sys_truncate
|
|
data8 sys_ftruncate
|
|
data8 sys_fchmod
|
|
data8 sys_fchown /* 16-bit version */ /* 95 */
|
|
data8 sys_getpriority
|
|
data8 sys_setpriority
|
|
data8 sys_ni_syscall /* old profil syscall holder */
|
|
data8 compat_sys_statfs
|
|
data8 compat_sys_fstatfs /* 100 */
|
|
data8 sys_ni_syscall /* ioperm */
|
|
data8 compat_sys_socketcall
|
|
data8 sys_syslog
|
|
data8 compat_sys_setitimer
|
|
data8 compat_sys_getitimer /* 105 */
|
|
data8 compat_sys_newstat
|
|
data8 compat_sys_newlstat
|
|
data8 compat_sys_newfstat
|
|
data8 sys_ni_syscall
|
|
data8 sys_ni_syscall /* iopl */ /* 110 */
|
|
data8 sys_vhangup
|
|
data8 sys_ni_syscall /* used to be sys_idle */
|
|
data8 sys_ni_syscall
|
|
data8 compat_sys_wait4
|
|
data8 sys_swapoff /* 115 */
|
|
data8 compat_sys_sysinfo
|
|
data8 sys32_ipc
|
|
data8 sys_fsync
|
|
data8 sys32_sigreturn
|
|
data8 ia32_clone /* 120 */
|
|
data8 sys_setdomainname
|
|
data8 sys32_newuname
|
|
data8 sys32_modify_ldt
|
|
data8 compat_sys_adjtimex
|
|
data8 sys32_mprotect /* 125 */
|
|
data8 compat_sys_sigprocmask
|
|
data8 sys_ni_syscall /* create_module */
|
|
data8 sys_ni_syscall /* init_module */
|
|
data8 sys_ni_syscall /* delete_module */
|
|
data8 sys_ni_syscall /* get_kernel_syms */ /* 130 */
|
|
data8 sys32_quotactl
|
|
data8 sys_getpgid
|
|
data8 sys_fchdir
|
|
data8 sys_ni_syscall /* sys_bdflush */
|
|
data8 sys_sysfs /* 135 */
|
|
data8 sys32_personality
|
|
data8 sys_ni_syscall /* for afs_syscall */
|
|
data8 sys_setfsuid /* 16-bit version */
|
|
data8 sys_setfsgid /* 16-bit version */
|
|
data8 sys_llseek /* 140 */
|
|
data8 compat_sys_getdents
|
|
data8 compat_sys_select
|
|
data8 sys_flock
|
|
data8 sys32_msync
|
|
data8 compat_sys_readv /* 145 */
|
|
data8 compat_sys_writev
|
|
data8 sys_getsid
|
|
data8 sys_fdatasync
|
|
data8 sys32_sysctl
|
|
data8 sys_mlock /* 150 */
|
|
data8 sys_munlock
|
|
data8 sys_mlockall
|
|
data8 sys_munlockall
|
|
data8 sys_sched_setparam
|
|
data8 sys_sched_getparam /* 155 */
|
|
data8 sys_sched_setscheduler
|
|
data8 sys_sched_getscheduler
|
|
data8 sys_sched_yield
|
|
data8 sys_sched_get_priority_max
|
|
data8 sys_sched_get_priority_min /* 160 */
|
|
data8 sys32_sched_rr_get_interval
|
|
data8 compat_sys_nanosleep
|
|
data8 sys32_mremap
|
|
data8 sys_setresuid /* 16-bit version */
|
|
data8 sys32_getresuid16 /* 16-bit version */ /* 165 */
|
|
data8 sys_ni_syscall /* vm86 */
|
|
data8 sys_ni_syscall /* sys_query_module */
|
|
data8 sys_poll
|
|
data8 sys_ni_syscall /* nfsservctl */
|
|
data8 sys_setresgid /* 170 */
|
|
data8 sys32_getresgid16
|
|
data8 sys_prctl
|
|
data8 sys32_rt_sigreturn
|
|
data8 sys32_rt_sigaction
|
|
data8 sys32_rt_sigprocmask /* 175 */
|
|
data8 sys_rt_sigpending
|
|
data8 compat_sys_rt_sigtimedwait
|
|
data8 sys32_rt_sigqueueinfo
|
|
data8 compat_sys_rt_sigsuspend
|
|
data8 sys32_pread /* 180 */
|
|
data8 sys32_pwrite
|
|
data8 sys_chown /* 16-bit version */
|
|
data8 sys_getcwd
|
|
data8 sys_capget
|
|
data8 sys_capset /* 185 */
|
|
data8 sys32_sigaltstack
|
|
data8 sys32_sendfile
|
|
data8 sys_ni_syscall /* streams1 */
|
|
data8 sys_ni_syscall /* streams2 */
|
|
data8 sys32_vfork /* 190 */
|
|
data8 compat_sys_getrlimit
|
|
data8 sys32_mmap2
|
|
data8 sys32_truncate64
|
|
data8 sys32_ftruncate64
|
|
data8 sys32_stat64 /* 195 */
|
|
data8 sys32_lstat64
|
|
data8 sys32_fstat64
|
|
data8 sys_lchown
|
|
data8 sys_getuid
|
|
data8 sys_getgid /* 200 */
|
|
data8 sys_geteuid
|
|
data8 sys_getegid
|
|
data8 sys_setreuid
|
|
data8 sys_setregid
|
|
data8 sys_getgroups /* 205 */
|
|
data8 sys_setgroups
|
|
data8 sys_fchown
|
|
data8 sys_setresuid
|
|
data8 sys_getresuid
|
|
data8 sys_setresgid /* 210 */
|
|
data8 sys_getresgid
|
|
data8 sys_chown
|
|
data8 sys_setuid
|
|
data8 sys_setgid
|
|
data8 sys_setfsuid /* 215 */
|
|
data8 sys_setfsgid
|
|
data8 sys_pivot_root
|
|
data8 sys_mincore
|
|
data8 sys_madvise
|
|
data8 compat_sys_getdents64 /* 220 */
|
|
data8 compat_sys_fcntl64
|
|
data8 sys_ni_syscall /* reserved for TUX */
|
|
data8 sys_ni_syscall /* reserved for Security */
|
|
data8 sys_gettid
|
|
data8 sys_readahead /* 225 */
|
|
data8 sys_setxattr
|
|
data8 sys_lsetxattr
|
|
data8 sys_fsetxattr
|
|
data8 sys_getxattr
|
|
data8 sys_lgetxattr /* 230 */
|
|
data8 sys_fgetxattr
|
|
data8 sys_listxattr
|
|
data8 sys_llistxattr
|
|
data8 sys_flistxattr
|
|
data8 sys_removexattr /* 235 */
|
|
data8 sys_lremovexattr
|
|
data8 sys_fremovexattr
|
|
data8 sys_tkill
|
|
data8 sys_sendfile64
|
|
data8 compat_sys_futex /* 240 */
|
|
data8 compat_sys_sched_setaffinity
|
|
data8 compat_sys_sched_getaffinity
|
|
data8 sys32_set_thread_area
|
|
data8 sys32_get_thread_area
|
|
data8 compat_sys_io_setup /* 245 */
|
|
data8 sys_io_destroy
|
|
data8 compat_sys_io_getevents
|
|
data8 compat_sys_io_submit
|
|
data8 sys_io_cancel
|
|
data8 sys_fadvise64 /* 250 */
|
|
data8 sys_ni_syscall
|
|
data8 sys_exit_group
|
|
data8 sys_lookup_dcookie
|
|
data8 sys_epoll_create
|
|
data8 sys32_epoll_ctl /* 255 */
|
|
data8 sys32_epoll_wait
|
|
data8 sys_remap_file_pages
|
|
data8 sys_set_tid_address
|
|
data8 compat_sys_timer_create
|
|
data8 compat_sys_timer_settime /* 260 */
|
|
data8 compat_sys_timer_gettime
|
|
data8 sys_timer_getoverrun
|
|
data8 sys_timer_delete
|
|
data8 compat_sys_clock_settime
|
|
data8 compat_sys_clock_gettime /* 265 */
|
|
data8 compat_sys_clock_getres
|
|
data8 compat_sys_clock_nanosleep
|
|
data8 compat_sys_statfs64
|
|
data8 compat_sys_fstatfs64
|
|
data8 sys_tgkill /* 270 */
|
|
data8 compat_sys_utimes
|
|
data8 sys32_fadvise64_64
|
|
data8 sys_ni_syscall
|
|
data8 sys_ni_syscall
|
|
data8 sys_ni_syscall /* 275 */
|
|
data8 sys_ni_syscall
|
|
data8 compat_sys_mq_open
|
|
data8 sys_mq_unlink
|
|
data8 compat_sys_mq_timedsend
|
|
data8 compat_sys_mq_timedreceive /* 280 */
|
|
data8 compat_sys_mq_notify
|
|
data8 compat_sys_mq_getsetattr
|
|
data8 sys_ni_syscall /* reserved for kexec */
|
|
data8 compat_sys_waitid
|
|
|
|
// guard against failures to increase IA32_NR_syscalls
|
|
.org ia32_syscall_table + 8*IA32_NR_syscalls
|