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x86: Add _CET_ENDBR to functions in crti.S

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Add _CET_ENDBR to functions in crti.S, which are called indirectly, to
support IBT.

Tested on i686 and x86-64.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

	* sysdeps/i386/crti.S (_init): Add _CET_ENDBR.
	(_fini): Likewise.
	* sysdeps/x86_64/crti.S (_init): Likewise.
	(_fini): Likewise.
This commit is contained in:
H.J. Lu 2018-07-17 16:04:41 -07:00
parent 9145f0333d
commit 124bcde683
3 changed files with 11 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2018-07-17 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/i386/crti.S (_init): Add _CET_ENDBR.
(_fini): Likewise.
* sysdeps/x86_64/crti.S (_init): Likewise.
(_fini): Likewise.
2018-07-17 Rafal Luzynski <digitalfreak@lingonborough.com>
[BZ #23140]

2
sysdeps/i386/crti.S
View File

@ -61,6 +61,7 @@
.hidden _init
.type _init, @function
_init:
_CET_ENDBR
pushl %ebx
/* Maintain 16-byte stack alignment for called functions. */
subl $8, %esp
@ -81,6 +82,7 @@ _init:
.hidden _fini
.type _fini, @function
_fini:
_CET_ENDBR
pushl %ebx
subl $8, %esp
LOAD_PIC_REG (bx)

2
sysdeps/x86_64/crti.S
View File

@ -61,6 +61,7 @@
.hidden _init
.type _init, @function
_init:
_CET_ENDBR
/* Maintain 16-byte stack alignment for called functions. */
subq $8, %rsp
#if PREINIT_FUNCTION_WEAK
@ -79,4 +80,5 @@ _init:
.hidden _fini
.type _fini, @function
_fini:
_CET_ENDBR
subq $8, %rsp