diff options
Diffstat (limited to 'sysdeps/x86_64/strcpy.S')
| -rw-r--r-- | sysdeps/x86_64/strcpy.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sysdeps/x86_64/strcpy.S b/sysdeps/x86_64/strcpy.S index 612824700a..2b78e95427 100644 --- a/sysdeps/x86_64/strcpy.S +++ b/sysdeps/x86_64/strcpy.S @@ -26,6 +26,10 @@ .text ENTRY (STRCPY) +#ifdef __CHKP__ + bndcl (%rdi), %bnd0 + bndcl (%rsi), %bnd1 +#endif movq %rsi, %rcx /* Source register. */ andl $7, %ecx /* mask alignment bits */ movq %rdi, %rdx /* Duplicate destination pointer. */ @@ -36,8 +40,14 @@ ENTRY (STRCPY) addl $8,%ecx /* Search the first bytes directly. */ 0: +#ifdef __CHKP__ + bndcu (%rsi), %bnd1 +#endif movb (%rsi), %al /* Fetch a byte */ testb %al, %al /* Is it NUL? */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movb %al, (%rdx) /* Store it */ jz 4f /* If it was NUL, done! */ incq %rsi @@ -54,6 +64,9 @@ ENTRY (STRCPY) .p2align 4 1: /* 1st unroll. */ +#ifdef __CHKP__ + bndcu (%rsi), %bnd1 +#endif movq (%rsi), %rax /* Read double word (8 bytes). */ addq $8, %rsi /* Adjust pointer for next word. */ movq %rax, %r9 /* Save a copy for NUL finding. */ @@ -68,10 +81,16 @@ ENTRY (STRCPY) jnz 3f /* found NUL => return pointer */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movq %rax, (%rdx) /* Write value to destination. */ addq $8, %rdx /* Adjust pointer. */ /* 2nd unroll. */ +#ifdef __CHKP__ + bndcu (%rsi), %bnd1 +#endif movq (%rsi), %rax /* Read double word (8 bytes). */ addq $8, %rsi /* Adjust pointer for next word. */ movq %rax, %r9 /* Save a copy for NUL finding. */ @@ -86,10 +105,16 @@ ENTRY (STRCPY) jnz 3f /* found NUL => return pointer */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movq %rax, (%rdx) /* Write value to destination. */ addq $8, %rdx /* Adjust pointer. */ /* 3rd unroll. */ +#ifdef __CHKP__ + bndcu (%rsi), %bnd1 +#endif movq (%rsi), %rax /* Read double word (8 bytes). */ addq $8, %rsi /* Adjust pointer for next word. */ movq %rax, %r9 /* Save a copy for NUL finding. */ @@ -104,10 +129,16 @@ ENTRY (STRCPY) jnz 3f /* found NUL => return pointer */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movq %rax, (%rdx) /* Write value to destination. */ addq $8, %rdx /* Adjust pointer. */ /* 4th unroll. */ +#ifdef __CHKP__ + bndcu (%rsi), %bnd1 +#endif movq (%rsi), %rax /* Read double word (8 bytes). */ addq $8, %rsi /* Adjust pointer for next word. */ movq %rax, %r9 /* Save a copy for NUL finding. */ @@ -122,6 +153,9 @@ ENTRY (STRCPY) jnz 3f /* found NUL => return pointer */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movq %rax, (%rdx) /* Write value to destination. */ addq $8, %rdx /* Adjust pointer. */ jmp 1b /* Next iteration. */ @@ -132,10 +166,16 @@ ENTRY (STRCPY) 3: /* Note that stpcpy needs to return with the value of the NUL byte. */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movb %al, (%rdx) /* 1st byte. */ testb %al, %al /* Is it NUL. */ jz 4f /* yes, finish. */ incq %rdx /* Increment destination. */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movb %ah, (%rdx) /* 2nd byte. */ testb %ah, %ah /* Is it NUL?. */ jz 4f /* yes, finish. */ |