2 Sdiff usr/src/uts/i86pc/ml/fast_trap

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11787 Kernel needs to be built with retpolines
11788 Kernel needs to generally use RSB stuffing
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: John Levon <john.levon@joyent.com>

   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.

  24  */
  25 
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27 
  28 #include <sys/asm_linkage.h>
  29 #include <sys/asm_misc.h>
  30 #include <sys/regset.h>
  31 #include <sys/psw.h>
  32 
  33 #if defined(__lint)
  34 
  35 #include <sys/types.h>
  36 #include <sys/thread.h>
  37 #include <sys/systm.h>
  38 #include <sys/lgrp.h>
  39 
  40 #else   /* __lint */
  41 
  42 #include <sys/pcb.h>
  43 #include <sys/trap.h>
  44 #include <sys/ftrace.h>
  45 #include <sys/traptrace.h>
  46 #include <sys/clock.h>
  47 #include <sys/panic.h>

  84 }
  85 
  86 #else   /* __lint */
  87 
  88 /*
  89  * XX64: We are assuming that libc continues to expect the 64-bit value being
  90  * returned in %edx:%eax.  We further assume that it is safe to leave
  91  * the top 32-bit intact in %rax as they will be ignored by libc.  In
  92  * other words, if the 64-bit value is already in %rax, while we manually
  93  * manufacture a 64-bit value in %edx:%eax by setting %edx to be the high
  94  * 32 bits of %rax, we don't zero them out in %rax.
  95  * The following amd64 versions will need to be changed if the above
  96  * assumptions are not true.
  97  */
  98 
  99 #if defined(__amd64)
 100 
 101         .globl  gethrtimef
 102         ENTRY_NP(get_hrtime)
 103         FAST_INTR_PUSH
 104         call    *gethrtimef(%rip)

 105         movq    %rax, %rdx
 106         shrq    $32, %rdx                       /* high 32-bit in %edx */
 107         FAST_INTR_POP
 108         FAST_INTR_RETURN
 109         SET_SIZE(get_hrtime)
 110 
 111 #elif defined(__i386)
 112 
 113         .globl  gethrtimef
 114         ENTRY_NP(get_hrtime)
 115         FAST_INTR_PUSH
 116         call    *gethrtimef
 117         FAST_INTR_POP
 118         FAST_INTR_RETURN
 119         SET_SIZE(get_hrtime)
 120 
 121 #endif  /* __i386 */
 122 
 123 #if defined(__amd64)
 124 
 125         .globl  gethrestimef
 126         ENTRY_NP(get_hrestime)
 127         FAST_INTR_PUSH
 128         subq    $TIMESPEC_SIZE, %rsp
 129         movq    %rsp, %rdi
 130         call    *gethrestimef(%rip)

 131         movl    (%rsp), %eax
 132         movl    CLONGSIZE(%rsp), %edx
 133         addq    $TIMESPEC_SIZE, %rsp
 134         FAST_INTR_POP
 135         FAST_INTR_RETURN
 136         SET_SIZE(get_hrestime)
 137 
 138 #elif defined(__i386)
 139 
 140         .globl  gethrestimef
 141         ENTRY_NP(get_hrestime)
 142         FAST_INTR_PUSH
 143         subl    $TIMESPEC_SIZE, %esp
 144         pushl   %esp
 145         call    *gethrestimef
 146         movl    _CONST(4 + 0)(%esp), %eax
 147         movl    _CONST(4 + CLONGSIZE)(%esp), %edx
 148         addl    $_CONST(4 + TIMESPEC_SIZE), %esp
 149         FAST_INTR_POP
 150         FAST_INTR_RETURN

   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  * Copyright 2019 Joyent, Inc.
  25  */
  26 


  27 #include <sys/asm_linkage.h>
  28 #include <sys/asm_misc.h>
  29 #include <sys/regset.h>
  30 #include <sys/psw.h>
  31 
  32 #if defined(__lint)
  33 
  34 #include <sys/types.h>
  35 #include <sys/thread.h>
  36 #include <sys/systm.h>
  37 #include <sys/lgrp.h>
  38 
  39 #else   /* __lint */
  40 
  41 #include <sys/pcb.h>
  42 #include <sys/trap.h>
  43 #include <sys/ftrace.h>
  44 #include <sys/traptrace.h>
  45 #include <sys/clock.h>
  46 #include <sys/panic.h>

  83 }
  84 
  85 #else   /* __lint */
  86 
  87 /*
  88  * XX64: We are assuming that libc continues to expect the 64-bit value being
  89  * returned in %edx:%eax.  We further assume that it is safe to leave
  90  * the top 32-bit intact in %rax as they will be ignored by libc.  In
  91  * other words, if the 64-bit value is already in %rax, while we manually
  92  * manufacture a 64-bit value in %edx:%eax by setting %edx to be the high
  93  * 32 bits of %rax, we don't zero them out in %rax.
  94  * The following amd64 versions will need to be changed if the above
  95  * assumptions are not true.
  96  */
  97 
  98 #if defined(__amd64)
  99 
 100         .globl  gethrtimef
 101         ENTRY_NP(get_hrtime)
 102         FAST_INTR_PUSH
 103         movq    gethrtimef(%rip), %rax
 104         INDIRECT_CALL_REG(rax)
 105         movq    %rax, %rdx
 106         shrq    $32, %rdx                       /* high 32-bit in %edx */
 107         FAST_INTR_POP
 108         FAST_INTR_RETURN
 109         SET_SIZE(get_hrtime)
 110 
 111 #elif defined(__i386)
 112 
 113         .globl  gethrtimef
 114         ENTRY_NP(get_hrtime)
 115         FAST_INTR_PUSH
 116         call    *gethrtimef
 117         FAST_INTR_POP
 118         FAST_INTR_RETURN
 119         SET_SIZE(get_hrtime)
 120 
 121 #endif  /* __i386 */
 122 
 123 #if defined(__amd64)
 124 
 125         .globl  gethrestimef
 126         ENTRY_NP(get_hrestime)
 127         FAST_INTR_PUSH
 128         subq    $TIMESPEC_SIZE, %rsp
 129         movq    %rsp, %rdi
 130         movq    gethrestimef(%rip), %rax
 131         INDIRECT_CALL_REG(rax)
 132         movl    (%rsp), %eax
 133         movl    CLONGSIZE(%rsp), %edx
 134         addq    $TIMESPEC_SIZE, %rsp
 135         FAST_INTR_POP
 136         FAST_INTR_RETURN
 137         SET_SIZE(get_hrestime)
 138 
 139 #elif defined(__i386)
 140 
 141         .globl  gethrestimef
 142         ENTRY_NP(get_hrestime)
 143         FAST_INTR_PUSH
 144         subl    $TIMESPEC_SIZE, %esp
 145         pushl   %esp
 146         call    *gethrestimef
 147         movl    _CONST(4 + 0)(%esp), %eax
 148         movl    _CONST(4 + CLONGSIZE)(%esp), %edx
 149         addl    $_CONST(4 + TIMESPEC_SIZE), %esp
 150         FAST_INTR_POP
 151         FAST_INTR_RETURN