[src/trunk]: src/sys/arch/amd64/amd64 Always use END() markers when declaring...

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/392926abe7af
branches:  trunk
changeset: 827496:392926abe7af
user:      maxv <maxv%NetBSD.org@localhost>
date:      Mon Oct 30 17:06:42 2017 +0000

description:
Always use END() markers when declaring functions in assembly, so that ld
can compute the size of the functions. A few remain.

While here, fix a bug in the INTRSTUB macro: we are falling through
resume_, but it is aligned, so it looks like we're executing the inter-
function padding - which probably happens to contain NOPs, but that's
still bad.

diffstat:

 sys/arch/amd64/amd64/copy.S            |   21 +++++-
 sys/arch/amd64/amd64/cpufunc.S         |  105 +++++++++++++++++++++++++++++++-
 sys/arch/amd64/amd64/linux32_sigcode.S |    3 +-
 sys/arch/amd64/amd64/linux_sigcode.S   |    3 +-
 sys/arch/amd64/amd64/vector.S          |   10 ++-
 5 files changed, 131 insertions(+), 11 deletions(-)

diffs (truncated from 839 to 300 lines):

diff -r db91b5a5dfc9 -r 392926abe7af sys/arch/amd64/amd64/copy.S
--- a/sys/arch/amd64/amd64/copy.S       Mon Oct 30 16:01:19 2017 +0000
+++ b/sys/arch/amd64/amd64/copy.S       Mon Oct 30 17:06:42 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: copy.S,v 1.26 2017/10/17 07:02:50 maxv Exp $   */
+/*     $NetBSD: copy.S,v 1.27 2017/10/30 17:06:42 maxv Exp $   */
 
 /*
  * Copyright (c) 2001 Wasabi Systems, Inc.
@@ -105,6 +105,7 @@
        popq    %rdi
        leaveq
        ret
+END(do_pmap_load)
 
 /*
  * SMAP functions. ret+int3+int3 is patched dynamically to STAC/CLAC.
@@ -116,6 +117,7 @@
        int3
        int3
        ret
+END(smap_enable)
 
 ENTRY(smap_disable)
 .Lstacpatch:
@@ -123,6 +125,7 @@
        int3
        int3
        ret
+END(smap_disable)
 
 /*
  * Copy routines from and to userland, plus a few more. See the
@@ -190,6 +193,7 @@
 .Lkcopy_end:
        xorq    %rax,%rax
        ret
+END(kcopy)
 
 ENTRY(copyout)
        DEFERRED_SWITCH_CHECK
@@ -219,6 +223,7 @@
        xorl    %eax,%eax
        ret
        DEFERRED_SWITCH_CALL
+END(copyout)
 
 ENTRY(copyin)
        DEFERRED_SWITCH_CHECK
@@ -249,6 +254,7 @@
        xorl    %eax,%eax
        ret
        DEFERRED_SWITCH_CALL
+END(copyin)
 
 NENTRY(copy_efault)
        movq    $EFAULT,%rax
@@ -308,6 +314,7 @@
        movq    $ENAMETOOLONG,%rax
        jmp     copystr_return
        DEFERRED_SWITCH_CALL
+END(copyoutstr)
 
 ENTRY(copyinstr)
        DEFERRED_SWITCH_CHECK
@@ -351,6 +358,7 @@
        movq    $ENAMETOOLONG,%rax
        jmp     copystr_return
        DEFERRED_SWITCH_CALL
+END(copyinstr)
 
 ENTRY(copystr_efault)
        movl    $EFAULT,%eax
@@ -394,7 +402,7 @@
        movq    %r8,(%rcx)
 
 7:     ret
-
+END(copystr)
 
 ENTRY(fuswintr)
        cmpl    $TLBSTATE_VALID,CPUVAR(TLBSTATE)
@@ -412,6 +420,7 @@
 
        movq    $0,PCB_ONFAULT(%rcx)
        ret
+END(fuswintr)
 
 ENTRY(fubyte)
        DEFERRED_SWITCH_CHECK
@@ -429,6 +438,7 @@
        movq    $0,PCB_ONFAULT(%rcx)
        ret
        DEFERRED_SWITCH_CALL
+END(fubyte)
 
 ENTRY(suswintr)
        cmpl    $TLBSTATE_VALID,CPUVAR(TLBSTATE)
@@ -447,6 +457,7 @@
        xorq    %rax,%rax
        movq    %rax,PCB_ONFAULT(%rcx)
        ret
+END(suswintr)
 
 ENTRY(subyte)
        DEFERRED_SWITCH_CHECK
@@ -466,6 +477,7 @@
        movq    %rax,PCB_ONFAULT(%rcx)
        ret
        DEFERRED_SWITCH_CALL
+END(subyte)
 
 /*
  * These are the same, but must reside at different addresses,
@@ -476,16 +488,19 @@
        movq    $0,PCB_ONFAULT(%rcx)
        movl    $-1,%eax
        ret
+END(fusuintrfailure)
 
 ENTRY(fusufailure)
        callq   smap_enable
        movq    $0,PCB_ONFAULT(%rcx)
        movl    $-1,%eax
        ret
+END(fusufailure)
 
 ENTRY(fusuaddrfault)
        movl    $-1,%eax
        ret
+END(fusuaddrfault)
 
 /*
  * Compare-and-swap the 64-bit integer in the user-space.
@@ -516,6 +531,7 @@
        xorq    %rax,%rax
        ret
        DEFERRED_SWITCH_CALL
+END(ucas_64)
 
 /*
  * int ucas_32(volatile int32_t *uptr, int32_t old, int32_t new, int32_t *ret);
@@ -544,6 +560,7 @@
        xorq    %rax,%rax
        ret
        DEFERRED_SWITCH_CALL
+END(ucas_32)
 
 ENTRY(ucas_efault)
        movq    $EFAULT,%rax
diff -r db91b5a5dfc9 -r 392926abe7af sys/arch/amd64/amd64/cpufunc.S
--- a/sys/arch/amd64/amd64/cpufunc.S    Mon Oct 30 16:01:19 2017 +0000
+++ b/sys/arch/amd64/amd64/cpufunc.S    Mon Oct 30 17:06:42 2017 +0000
@@ -1,6 +1,6 @@
-/*     $NetBSD: cpufunc.S,v 1.29 2017/10/15 11:31:00 maxv Exp $        */
+/*     $NetBSD: cpufunc.S,v 1.30 2017/10/30 17:06:42 maxv Exp $        */
 
-/*-
+/*
  * Copyright (c) 1998, 2007, 2008 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
@@ -51,23 +51,28 @@
 ENTRY(x86_lfence)
        lfence
        ret
+END(x86_lfence)
 
 ENTRY(x86_sfence)
        sfence
        ret
+END(x86_sfence)
 
 ENTRY(x86_mfence)
        mfence
        ret
+END(x86_mfence)
 
 #ifndef XEN
 ENTRY(invlpg)
        invlpg  (%rdi)
        ret
+END(invlpg)
 
 ENTRY(lidt)
        lidt    (%rdi)
        ret
+END(lidt)
 
 ENTRY(lldt)
        cmpl    %edi, CPUVAR(CURLDT)
@@ -77,51 +82,63 @@
        movl    %edi, CPUVAR(CURLDT)
        lldt    %di
        ret
+END(lldt)
 
 ENTRY(ltr)
        ltr     %di
        ret
+END(ltr)
 
 ENTRY(lcr0)
        movq    %rdi, %cr0
        ret
+END(lcr0)
 
 ENTRY(rcr0)
        movq    %cr0, %rax
        ret
+END(rcr0)
 
 ENTRY(lcr2)
        movq    %rdi, %cr2
        ret
+END(lcr2)
 
 ENTRY(rcr2)
        movq    %cr2, %rax
        ret
+END(rcr2)
 
 ENTRY(lcr3)
        movq    %rdi, %cr3
        ret
+END(lcr3)
 
 ENTRY(rcr3)
        movq    %cr3, %rax
        ret
+END(rcr3)
 #endif
 
 ENTRY(lcr4)
        movq    %rdi, %cr4
        ret
+END(lcr4)
 
 ENTRY(rcr4)
        movq    %cr4, %rax
        ret
+END(rcr4)
 
 ENTRY(lcr8)
        movq    %rdi, %cr8
        ret
+END(lcr8)
 
 ENTRY(rcr8)
        movq    %cr8, %rax
        ret
+END(rcr8)
 
 /*
  * Big hammer: flush all TLB entries, including ones from PTE's
@@ -151,73 +168,90 @@
        movq    %rdx, %cr4
        movq    %rax, %cr4
        ret
+END(tlbflushg)
 
 ENTRY(tlbflush)
 1:
        movq    %cr3, %rax
        movq    %rax, %cr3
        ret
+END(tlbflush)
 
 ENTRY(ldr0)
        movq    %rdi, %dr0
        ret
+END(ldr0)
 
 ENTRY(rdr0)
        movq    %dr0, %rax
        ret
+END(rdr0)
 
 ENTRY(ldr1)
        movq    %rdi, %dr1
        ret
+END(ldr1)
 
 ENTRY(rdr1)
        movq    %dr1, %rax
        ret
+END(rdr1)
 
 ENTRY(ldr2)
        movq    %rdi, %dr2
        ret
+END(ldr2)
 
 ENTRY(rdr2)
        movq    %dr2, %rax
        ret
+END(rdr2)
 
 ENTRY(ldr3)
        movq    %rdi, %dr3