Mercurial > illumos > illumos-gate
changeset 3412:6df5abe2a776
5030630 bcmp() on x86 cannot be dtraced
| author | jj204856 |
|---|---|
| date | Fri, 12 Jan 2007 02:16:19 -0800 |
| parents | ea61bbfa626e |
| children | f4cbe0204ab7 |
| files | usr/src/uts/intel/ia32/ml/i86_subr.s |
| diffstat | 1 files changed, 9 insertions(+), 7 deletions(-) [+] |
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--- a/usr/src/uts/intel/ia32/ml/i86_subr.s Thu Jan 11 23:35:34 2007 -0800 +++ b/usr/src/uts/intel/ia32/ml/i86_subr.s Fri Jan 12 02:16:19 2007 -0800 @@ -19,7 +19,7 @@ * CDDL HEADER END */ /* - * Copyright 2006 Sun Microsystems, Inc. All rights reserved. + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ @@ -3813,9 +3813,9 @@ #define ARG_LENGTH 16 ENTRY(bcmp) + pushl %ebp + movl %esp, %ebp / create new stack frame #ifdef DEBUG - pushl %ebp - movl %esp, %ebp movl kernelbase, %eax cmpl %eax, ARG_S1(%ebp) jb 0f @@ -3823,15 +3823,15 @@ jnb 1f 0: pushl $.bcmp_panic_msg call panic -1: popl %ebp +1: #endif /* DEBUG */ pushl %edi / save register variable - movl ARG_S1(%esp), %eax / %eax = address of string 1 - movl ARG_S2(%esp), %ecx / %ecx = address of string 2 + movl ARG_S1(%ebp), %eax / %eax = address of string 1 + movl ARG_S2(%ebp), %ecx / %ecx = address of string 2 cmpl %eax, %ecx / if the same string je .equal / goto .equal - movl ARG_LENGTH(%esp), %edi / %edi = length in bytes + movl ARG_LENGTH(%ebp), %edi / %edi = length in bytes cmpl $4, %edi / if %edi < 4 jb .byte_check / goto .byte_check .align 4 @@ -3862,11 +3862,13 @@ .equal: xorl %eax, %eax / %eax = 0 popl %edi / restore register variable + leave / restore old stack frame ret / return (NULL) .align 4 .not_equal: movl $1, %eax / return 1 popl %edi / restore register variable + leave / restore old stack frame ret / return (NULL) SET_SIZE(bcmp)