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Add support for Indirect Branch Tracking (IBT) #199

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Merged
merged 1 commit into from
May 16, 2022
Merged

Add support for Indirect Branch Tracking (IBT) #199

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7 changes: 6 additions & 1 deletion src/asm/jump_x86_64_sysv_elf_gas.S
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Original file line number Diff line number Diff line change
Expand Up @@ -23,13 +23,18 @@
* ---------------------------------------------------------------------------------- *
* *
****************************************************************************************/

# if defined __CET__
# include <cet.h>
# else
# define _CET_ENDBR
# endif
.file "jump_x86_64_sysv_elf_gas.S"
.text
.globl jump_fcontext
.type jump_fcontext,@function
.align 16
jump_fcontext:
_CET_ENDBR
leaq -0x38(%rsp), %rsp /* prepare stack */

#if !defined(BOOST_USE_TSX)
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9 changes: 8 additions & 1 deletion src/asm/make_x86_64_sysv_elf_gas.S
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Original file line number Diff line number Diff line change
Expand Up @@ -23,13 +23,18 @@
* ---------------------------------------------------------------------------------- *
* *
****************************************************************************************/

# if defined __CET__
# include <cet.h>
# else
# define _CET_ENDBR
# endif
.file "make_x86_64_sysv_elf_gas.S"
.text
.globl make_fcontext
.type make_fcontext,@function
.align 16
make_fcontext:
_CET_ENDBR
/* first arg of make_fcontext() == top of context-stack */
movq %rdi, %rax

Expand Down Expand Up @@ -64,13 +69,15 @@ make_fcontext:
ret /* return pointer to context-data */

trampoline:
_CET_ENDBR
/* store return address on stack */
/* fix stack alignment */
push %rbp
/* jump to context-function */
jmp *%rbx

finish:
_CET_ENDBR
/* exit code is zero */
xorq %rdi, %rdi
/* exit application */
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7 changes: 6 additions & 1 deletion src/asm/ontop_x86_64_sysv_elf_gas.S
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Original file line number Diff line number Diff line change
Expand Up @@ -23,13 +23,18 @@
* ---------------------------------------------------------------------------------- *
* *
****************************************************************************************/

# if defined __CET__
# include <cet.h>
# else
# define _CET_ENDBR
# endif
.file "ontop_x86_64_sysv_elf_gas.S"
.text
.globl ontop_fcontext
.type ontop_fcontext,@function
.align 16
ontop_fcontext:
_CET_ENDBR
/* preserve ontop-function in R8 */
movq %rdx, %r8

Expand Down