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| /* SPDX-License-Identifier: GPL-2.0 */
| /* SunOS's execv() call only specifies the argv argument, the
| * environment settings are the same as the calling processes.
| */
| sys64_execve:
| set sys_execve, %g1
| jmpl %g1, %g0
| flushw
|
| sys64_execveat:
| set sys_execveat, %g1
| jmpl %g1, %g0
| flushw
|
| #ifdef CONFIG_COMPAT
| sunos_execv:
| mov %g0, %o2
| sys32_execve:
| set compat_sys_execve, %g1
| jmpl %g1, %g0
| flushw
|
| sys32_execveat:
| set compat_sys_execveat, %g1
| jmpl %g1, %g0
| flushw
| #endif
|
| .align 32
| #ifdef CONFIG_COMPAT
| sys32_sigstack:
| ba,pt %xcc, do_sys32_sigstack
| 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|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %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:
| flushw
| ba,pt %xcc, sparc_vfork
| add %sp, PTREGS_OFF, %o0
|
| .align 32
| sys_fork:
| flushw
| ba,pt %xcc, sparc_fork
| add %sp, PTREGS_OFF, %o0
|
| .align 32
| sys_clone:
| flushw
| ba,pt %xcc, sparc_clone
| add %sp, PTREGS_OFF, %o0
|
| .globl ret_from_fork
| ret_from_fork:
| /* Clear current_thread_info()->new_child. */
| stb %g0, [%g6 + TI_NEW_CHILD]
| call schedule_tail
| mov %g7, %o0
| ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
| brnz,pt %o0, ret_sys_call
| ldx [%g6 + TI_FLAGS], %l0
| ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1
| call %l1
| ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0
| ba,pt %xcc, ret_sys_call
| mov 0, %o0
|
| .globl sparc_exit_group
| .type sparc_exit_group,#function
| sparc_exit_group:
| sethi %hi(sys_exit_group), %g7
| ba,pt %xcc, 1f
| or %g7, %lo(sys_exit_group), %g7
| .size sparc_exit_group,.-sparc_exit_group
|
| .globl sparc_exit
| .type sparc_exit,#function
| sparc_exit:
| sethi %hi(sys_exit), %g7
| or %g7, %lo(sys_exit), %g7
| 1: 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
| jmpl %g7, %g0
| 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
|
| /* Syscall tracing can modify the registers. */
| ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
| sethi %hi(sys_call_table32), %l7
| ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
| or %l7, %lo(sys_call_table32), %l7
| ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
| ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
| ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
| ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
| ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
|
| cmp %g1, NR_syscalls
| bgeu,pn %xcc, 3f
| mov -ENOSYS, %o0
|
| sll %g1, 2, %l4
| srl %i0, 0, %o0
| lduw [%l7 + %l4], %l7
| srl %i4, 0, %o4
| srl %i1, 0, %o1
| srl %i2, 0, %o2
| ba,pt %xcc, 5f
| srl %i3, 0, %o3
|
| linux_syscall_trace:
| call syscall_trace_enter
| add %sp, PTREGS_OFF, %o0
| brnz,pn %o0, 3f
| mov -ENOSYS, %o0
|
| /* Syscall tracing can modify the registers. */
| ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
| sethi %hi(sys_call_table64), %l7
| ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
| or %l7, %lo(sys_call_table64), %l7
| ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
| ldx [%sp + PTREGS_OFF + PT_V9_I2], %i2
| ldx [%sp + PTREGS_OFF + PT_V9_I3], %i3
| ldx [%sp + PTREGS_OFF + PT_V9_I4], %i4
| ldx [%sp + PTREGS_OFF + PT_V9_I5], %i5
|
| cmp %g1, NR_syscalls
| bgeu,pn %xcc, 3f
| mov -ENOSYS, %o0
|
| sll %g1, 2, %l4
| mov %i0, %o0
| lduw [%l7 + %l4], %l7
| 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 %i3, 0, %o3 ! IEU0
| srl %i2, 0, %o2 ! IEU0 Group
| andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
| bne,pn %icc, linux_syscall_trace32 ! CTI
| mov %i0, %l5 ! IEU1
| 5: call %l7 ! CTI Group brk forced
| srl %i5, 0, %o5 ! IEU1
| ba,pt %xcc, 3f
| sra %o0, 0, %o0
|
| /* 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|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %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
| mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
| sllx %g2, 32, %g2
|
| cmp %o0, -ERESTART_RESTARTBLOCK
| bgeu,pn %xcc, 1f
| andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
| ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
|
| 2:
| /* System call success, clear Carry condition code. */
| andn %g3, %g2, %g3
| 3:
| 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:
| /* Check if force_successful_syscall_return()
| * was invoked.
| */
| ldub [%g6 + TI_SYS_NOERROR], %l2
| brnz,pn %l2, 2b
| ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
| /* System call failure, set Carry condition code.
| * Also, get abs(errno) to return to the process.
| */
| sub %g0, %o0, %o0
| stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
| ba,pt %xcc, 3b
| or %g3, %g2, %g3
|
| 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]
|
|
