+++ /dev/null
- /* SunOS's execv() call only specifies the argv argument, the
- * environment settings are the same as the calling processes.
- */
-sys_execve:
- sethi %hi(sparc_execve), %g1
- ba,pt %xcc, execve_merge
- or %g1, %lo(sparc_execve), %g1
-
-#ifdef CONFIG_COMPAT
-sunos_execv:
- stx %g0, [%sp + PTREGS_OFF + PT_V9_I2]
-sys32_execve:
- sethi %hi(sparc32_execve), %g1
- or %g1, %lo(sparc32_execve), %g1
-#endif
-
-execve_merge:
- flushw
- jmpl %g1, %g0
- add %sp, PTREGS_OFF, %o0
-
- .align 32
-sys_pipe:
- ba,pt %xcc, sparc_pipe
- add %sp, PTREGS_OFF, %o0
-sys_nis_syscall:
- ba,pt %xcc, c_sys_nis_syscall
- add %sp, PTREGS_OFF, %o0
-sys_memory_ordering:
- ba,pt %xcc, sparc_memory_ordering
- add %sp, PTREGS_OFF, %o1
-sys_sigaltstack:
- ba,pt %xcc, do_sigaltstack
- add %i6, STACK_BIAS, %o2
-#ifdef CONFIG_COMPAT
-sys32_sigstack:
- ba,pt %xcc, do_sys32_sigstack
- mov %i6, %o2
-sys32_sigaltstack:
- ba,pt %xcc, do_sys32_sigaltstack
- mov %i6, %o2
-#endif
- .align 32
-#ifdef CONFIG_COMPAT
-sys32_sigreturn:
- add %sp, PTREGS_OFF, %o0
- call do_sigreturn32
- add %o7, 1f-.-4, %o7
- nop
-#endif
-sys_rt_sigreturn:
- add %sp, PTREGS_OFF, %o0
- call do_rt_sigreturn
- add %o7, 1f-.-4, %o7
- nop
-#ifdef CONFIG_COMPAT
-sys32_rt_sigreturn:
- add %sp, PTREGS_OFF, %o0
- call do_rt_sigreturn32
- add %o7, 1f-.-4, %o7
- nop
-#endif
- .align 32
-1: ldx [%g6 + TI_FLAGS], %l5
- andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
- be,pt %icc, rtrap
- nop
- call syscall_trace_leave
- add %sp, PTREGS_OFF, %o0
- ba,pt %xcc, rtrap
- nop
-
- /* This is how fork() was meant to be done, 8 instruction entry.
- *
- * I questioned the following code briefly, let me clear things
- * up so you must not reason on it like I did.
- *
- * Know the fork_kpsr etc. we use in the sparc32 port? We don't
- * need it here because the only piece of window state we copy to
- * the child is the CWP register. Even if the parent sleeps,
- * we are safe because we stuck it into pt_regs of the parent
- * so it will not change.
- *
- * XXX This raises the question, whether we can do the same on
- * XXX sparc32 to get rid of fork_kpsr _and_ fork_kwim. The
- * XXX answer is yes. We stick fork_kpsr in UREG_G0 and
- * XXX fork_kwim in UREG_G1 (global registers are considered
- * XXX volatile across a system call in the sparc ABI I think
- * XXX if it isn't we can use regs->y instead, anyone who depends
- * XXX upon the Y register being preserved across a fork deserves
- * XXX to lose).
- *
- * In fact we should take advantage of that fact for other things
- * during system calls...
- */
- .align 32
-sys_vfork: /* Under Linux, vfork and fork are just special cases of clone. */
- sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
- or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
- ba,pt %xcc, sys_clone
-sys_fork:
- clr %o1
- mov SIGCHLD, %o0
-sys_clone:
- flushw
- movrz %o1, %fp, %o1
- mov 0, %o3
- ba,pt %xcc, sparc_do_fork
- add %sp, PTREGS_OFF, %o2
-
- .globl ret_from_syscall
-ret_from_syscall:
- /* Clear current_thread_info()->new_child, and
- * check performance counter stuff too.
- */
- stb %g0, [%g6 + TI_NEW_CHILD]
- ldx [%g6 + TI_FLAGS], %l0
- call schedule_tail
- mov %g7, %o0
- andcc %l0, _TIF_PERFCTR, %g0
- be,pt %icc, 1f
- nop
- ldx [%g6 + TI_PCR], %o7
- wr %g0, %o7, %pcr
-
- /* Blackbird errata workaround. See commentary in
- * smp.c:smp_percpu_timer_interrupt() for more
- * information.
- */
- ba,pt %xcc, 99f
- nop
-
- .align 64
-99: wr %g0, %g0, %pic
- rd %pic, %g0
-
-1: ba,pt %xcc, ret_sys_call
- ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
-
- .globl sparc_exit
- .type sparc_exit,#function
-sparc_exit:
- rdpr %pstate, %g2
- wrpr %g2, PSTATE_IE, %pstate
- rdpr %otherwin, %g1
- rdpr %cansave, %g3
- add %g3, %g1, %g3
- wrpr %g3, 0x0, %cansave
- wrpr %g0, 0x0, %otherwin
- wrpr %g2, 0x0, %pstate
- ba,pt %xcc, sys_exit
- stb %g0, [%g6 + TI_WSAVED]
- .size sparc_exit,.-sparc_exit
-
-linux_sparc_ni_syscall:
- sethi %hi(sys_ni_syscall), %l7
- ba,pt %xcc, 4f
- or %l7, %lo(sys_ni_syscall), %l7
-
-linux_syscall_trace32:
- call syscall_trace_enter
- add %sp, PTREGS_OFF, %o0
- brnz,pn %o0, 3f
- mov -ENOSYS, %o0
- srl %i0, 0, %o0
- srl %i4, 0, %o4
- srl %i1, 0, %o1
- srl %i2, 0, %o2
- ba,pt %xcc, 2f
- srl %i3, 0, %o3
-
-linux_syscall_trace:
- call syscall_trace_enter
- add %sp, PTREGS_OFF, %o0
- brnz,pn %o0, 3f
- mov -ENOSYS, %o0
- mov %i0, %o0
- mov %i1, %o1
- mov %i2, %o2
- mov %i3, %o3
- b,pt %xcc, 2f
- mov %i4, %o4
-
-
- /* Linux 32-bit system calls enter here... */
- .align 32
- .globl linux_sparc_syscall32
-linux_sparc_syscall32:
- /* Direct access to user regs, much faster. */
- cmp %g1, NR_SYSCALLS ! IEU1 Group
- bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
- srl %i0, 0, %o0 ! IEU0
- sll %g1, 2, %l4 ! IEU0 Group
- srl %i4, 0, %o4 ! IEU1
- lduw [%l7 + %l4], %l7 ! Load
- srl %i1, 0, %o1 ! IEU0 Group
- ldx [%g6 + TI_FLAGS], %l0 ! Load
-
- srl %i5, 0, %o5 ! IEU1
- srl %i2, 0, %o2 ! IEU0 Group
- andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
- bne,pn %icc, linux_syscall_trace32 ! CTI
- mov %i0, %l5 ! IEU1
- call %l7 ! CTI Group brk forced
- srl %i3, 0, %o3 ! IEU0
- ba,a,pt %xcc, 3f
-
- /* Linux native system calls enter here... */
- .align 32
- .globl linux_sparc_syscall
-linux_sparc_syscall:
- /* Direct access to user regs, much faster. */
- cmp %g1, NR_SYSCALLS ! IEU1 Group
- bgeu,pn %xcc, linux_sparc_ni_syscall ! CTI
- mov %i0, %o0 ! IEU0
- sll %g1, 2, %l4 ! IEU0 Group
- mov %i1, %o1 ! IEU1
- lduw [%l7 + %l4], %l7 ! Load
-4: mov %i2, %o2 ! IEU0 Group
- ldx [%g6 + TI_FLAGS], %l0 ! Load
-
- mov %i3, %o3 ! IEU1
- mov %i4, %o4 ! IEU0 Group
- andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
- bne,pn %icc, linux_syscall_trace ! CTI Group
- mov %i0, %l5 ! IEU0
-2: call %l7 ! CTI Group brk forced
- mov %i5, %o5 ! IEU0
- nop
-
-3: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
-ret_sys_call:
- ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
- ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
- sra %o0, 0, %o0
- mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
- sllx %g2, 32, %g2
-
- /* Check if force_successful_syscall_return()
- * was invoked.
- */
- ldub [%g6 + TI_SYS_NOERROR], %l2
- brnz,a,pn %l2, 80f
- stb %g0, [%g6 + TI_SYS_NOERROR]
-
- cmp %o0, -ERESTART_RESTARTBLOCK
- bgeu,pn %xcc, 1f
- andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6
-80:
- /* System call success, clear Carry condition code. */
- andn %g3, %g2, %g3
- stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
- bne,pn %icc, linux_syscall_trace2
- add %l1, 0x4, %l2 ! npc = npc+4
- stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
- ba,pt %xcc, rtrap
- stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
-
-1:
- /* System call failure, set Carry condition code.
- * Also, get abs(errno) to return to the process.
- */
- andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6
- sub %g0, %o0, %o0
- or %g3, %g2, %g3
- stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
- stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
- bne,pn %icc, linux_syscall_trace2
- add %l1, 0x4, %l2 ! npc = npc+4
- stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
-
- b,pt %xcc, rtrap
- stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
-linux_syscall_trace2:
- call syscall_trace_leave
- add %sp, PTREGS_OFF, %o0
- stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
- ba,pt %xcc, rtrap
- stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
git.samba.org / sfrench / cifs-2.6.git / blobdiff