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4d000d5b96
We must use the "a" (allocate) attribute every time we emit an entry into the __ex_table section. For consistency, use "a" instead of #alloc which is some Solaris compat cruft GNU as provides on Sparc. Signed-off-by: David S. Miller <davem@davemloft.net>
224 lines
5.3 KiB
ArmAsm
224 lines
5.3 KiB
ArmAsm
/* $Id: entry64.S,v 1.7 2002/02/09 19:49:31 davem Exp $
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* entry64.S: Solaris syscall emulation entry point.
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*
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* Copyright (C) 1996,1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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* Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
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*/
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#include <linux/errno.h>
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#include <asm/head.h>
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#include <asm/asi.h>
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#include <asm/smp.h>
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#include <asm/ptrace.h>
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#include <asm/page.h>
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#include <asm/signal.h>
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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#include <asm/thread_info.h>
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#include "conv.h"
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#define NR_SYSCALLS 256
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.text
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solaris_syscall_trace:
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add %sp, PTREGS_OFF, %o0
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call syscall_trace
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mov 0, %o1
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srl %i0, 0, %o0
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mov %i4, %o4
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srl %i1, 0, %o1
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mov %i5, %o5
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andcc %l3, 1, %g0
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be,pt %icc, 2f
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srl %i2, 0, %o2
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b,pt %xcc, 2f
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add %sp, PTREGS_OFF, %o0
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solaris_sucks:
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/* Solaris is a big system which needs to be able to do all the things
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* in Inf+1 different ways */
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add %i6, 0x5c, %o0
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mov %i0, %g1
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mov %i1, %i0
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mov %i2, %i1
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srl %o0, 0, %o0
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mov %i3, %i2
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movrz %g1, 256, %g1 /* Ensure we don't loop forever */
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mov %i4, %i3
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mov %i5, %i4
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ba,pt %xcc, solaris_sparc_syscall
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exen: lduwa [%o0] ASI_S, %i5
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exenf: ba,pt %xcc, solaris_sparc_syscall
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clr %i5
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/* For shared binaries, binfmt_elf32 already sets up personality
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and exec_domain. This is to handle static binaries as well */
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solaris_reg:
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call solaris_register
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nop
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ba,pt %xcc, 1f
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mov %i4, %o4
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linux_syscall_for_solaris:
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sethi %hi(sys_call_table32), %l6
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or %l6, %lo(sys_call_table32), %l6
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sll %l3, 2, %l4
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ba,pt %xcc, 10f
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lduw [%l6 + %l4], %l3
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/* Solaris system calls enter here... */
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.align 32
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.globl solaris_sparc_syscall, entry64_personality_patch
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solaris_sparc_syscall:
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entry64_personality_patch:
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ldub [%g4 + 0x0], %l0
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cmp %g1, 255
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bg,pn %icc, solaris_unimplemented
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srl %g1, 0, %g1
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sethi %hi(solaris_sys_table), %l7
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or %l7, %lo(solaris_sys_table), %l7
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brz,pn %g1, solaris_sucks
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mov %i4, %o4
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sll %g1, 2, %l4
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cmp %l0, 1
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bne,pn %icc, solaris_reg
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1: srl %i0, 0, %o0
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lduw [%l7 + %l4], %l3
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srl %i1, 0, %o1
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ldx [%g6 + TI_FLAGS], %l5
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cmp %l3, NR_SYSCALLS
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bleu,a,pn %xcc, linux_syscall_for_solaris
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nop
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andcc %l3, 1, %g0
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bne,a,pn %icc, 10f
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add %sp, PTREGS_OFF, %o0
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10: srl %i2, 0, %o2
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mov %i5, %o5
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andn %l3, 3, %l7
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andcc %l5, _TIF_SYSCALL_TRACE, %g0
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bne,pn %icc, solaris_syscall_trace
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mov %i0, %l5
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2: call %l7
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srl %i3, 0, %o3
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ret_from_solaris:
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stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
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ldx [%g6 + TI_FLAGS], %l6
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sra %o0, 0, %o0
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mov %ulo(TSTATE_XCARRY | TSTATE_ICARRY), %g2
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ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
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cmp %o0, -ERESTART_RESTARTBLOCK
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sllx %g2, 32, %g2
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bgeu,pn %xcc, 1f
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andcc %l6, _TIF_SYSCALL_TRACE, %l6
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/* System call success, clear Carry condition code. */
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andn %g3, %g2, %g3
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stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
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bne,pn %icc, solaris_syscall_trace2
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ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1
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andcc %l1, 1, %g0
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bne,pn %icc, 2f
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clr %l6
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add %l1, 0x4, %l2
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stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] ! pc = npc
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call rtrap
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stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] !npc = npc+4
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/* When tnpc & 1, this comes from setcontext and we don't want to advance pc */
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2: andn %l1, 3, %l1
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call rtrap
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stx %l1, [%sp + PTREGS_OFF + PT_V9_TNPC] !npc = npc&~3
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1:
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/* System call failure, set Carry condition code.
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* Also, get abs(errno) to return to the process.
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*/
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sub %g0, %o0, %o0
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or %g3, %g2, %g3
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cmp %o0, ERANGE /* 0-ERANGE are identity mapped */
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bleu,pt %icc, 1f
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cmp %o0, EMEDIUMTYPE
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bgu,pn %icc, 1f
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sethi %hi(solaris_err_table), %l6
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sll %o0, 2, %o0
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or %l6, %lo(solaris_err_table), %l6
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ldsw [%l6 + %o0], %o0
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1: stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
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mov 1, %l6
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stx %g3, [%sp + PTREGS_OFF + PT_V9_TSTATE]
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bne,pn %icc, solaris_syscall_trace2
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ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1
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andcc %l1, 1, %g0
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bne,pn %icc, 2b
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add %l1, 0x4, %l2
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stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC] ! pc = npc
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call rtrap
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stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC] !npc = npc+4
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solaris_syscall_trace2:
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add %sp, PTREGS_OFF, %o0
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call syscall_trace
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mov 1, %o1
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add %l1, 0x4, %l2 /* npc = npc+4 */
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andcc %l1, 1, %g0
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bne,pn %icc, 2b
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nop
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stx %l1, [%sp + PTREGS_OFF + PT_V9_TPC]
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call rtrap
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stx %l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
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/* This one is tricky, so that's why we do it in assembly */
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.globl solaris_sigsuspend
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solaris_sigsuspend:
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call do_sol_sigsuspend
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nop
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brlz,pn %o0, ret_from_solaris
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nop
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call sys_sigsuspend
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stx %o0, [%sp + PTREGS_OFF + PT_V9_I0]
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b,pt %xcc, ret_from_solaris
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nop
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.globl solaris_getpid
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solaris_getpid:
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call sys_getppid
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nop
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call sys_getpid
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stx %o0, [%sp + PTREGS_OFF + PT_V9_I1]
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b,pt %xcc, ret_from_solaris
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nop
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.globl solaris_getuid
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solaris_getuid:
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call sys_geteuid
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nop
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call sys_getuid
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stx %o1, [%sp + PTREGS_OFF + PT_V9_I1]
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b,pt %xcc, ret_from_solaris
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nop
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.globl solaris_getgid
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solaris_getgid:
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call sys_getegid
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nop
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call sys_getgid
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stx %o1, [%sp + PTREGS_OFF + PT_V9_I1]
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b,pt %xcc, ret_from_solaris
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nop
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.globl solaris_unimplemented
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solaris_unimplemented:
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call do_sol_unimplemented
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add %sp, PTREGS_OFF, %o0
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ba,pt %xcc, ret_from_solaris
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nop
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.section __ex_table,"a"
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.align 4
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.word exen, exenf
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