/* 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]