aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64/ia32/ia32_entry.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ia64/ia32/ia32_entry.S')
-rw-r--r--arch/ia64/ia32/ia32_entry.S500
1 files changed, 500 insertions, 0 deletions
diff --git a/arch/ia64/ia32/ia32_entry.S b/arch/ia64/ia32/ia32_entry.S
new file mode 100644
index 000000000000..829a6d80711c
--- /dev/null
+++ b/arch/ia64/ia32/ia32_entry.S
@@ -0,0 +1,500 @@
+#include <asm/asmmacro.h>
+#include <asm/ia32.h>
+#include <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 = &regs
+ 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)
+
+ENTRY(sys32_rt_sigsuspend)
+ .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
+ alloc loc1=ar.pfs,8,2,3,0 // preserve all eight input regs
+ mov loc0=rp
+ mov out0=in0 // mask
+ mov out1=in1 // sigsetsize
+ mov out2=sp // out2 = &sigscratch
+ .fframe 16
+ adds sp=-16,sp // allocate dummy "sigscratch"
+ ;;
+ .body
+ br.call.sptk.many rp=ia32_rt_sigsuspend
+1: .restore sp
+ adds sp=16,sp
+ mov rp=loc0
+ mov ar.pfs=loc1
+ br.ret.sptk.many rp
+END(sys32_rt_sigsuspend)
+
+ENTRY(sys32_sigsuspend)
+ .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
+ alloc loc1=ar.pfs,8,2,3,0 // preserve all eight input regs
+ mov loc0=rp
+ mov out0=in2 // mask (first two args are ignored)
+ ;;
+ mov out1=sp // out1 = &sigscratch
+ .fframe 16
+ adds sp=-16,sp // allocate dummy "sigscratch"
+ .body
+ br.call.sptk.many rp=ia32_sigsuspend
+1: .restore sp
+ adds sp=16,sp
+ mov rp=loc0
+ mov ar.pfs=loc1
+ br.ret.sptk.many rp
+END(sys32_sigsuspend)
+
+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
+.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 = &regs
+ 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 sys32_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 sys32_ptrace
+ data8 sys32_alarm
+ data8 sys_ni_syscall
+ data8 sys32_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 sys32_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 sys32_gettimeofday
+ data8 sys32_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 sys32_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 sys32_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 sys_ni_syscall /* 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 sys_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 sys32_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 sys32_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