diff options
Diffstat (limited to 'sysdeps/x86_64/strcat.S')
| -rw-r--r-- | sysdeps/x86_64/strcat.S | 53 |
1 files changed, 52 insertions, 1 deletions
diff --git a/sysdeps/x86_64/strcat.S b/sysdeps/x86_64/strcat.S index 8bea6fb5db..783237937d 100644 --- a/sysdeps/x86_64/strcat.S +++ b/sysdeps/x86_64/strcat.S @@ -25,6 +25,11 @@ .text ENTRY (strcat) +#ifdef __CHKP__ + bndcl (%rdi), %bnd0 + bndcl (%rsi), %bnd1 +#endif + movq %rdi, %rcx /* Dest. register. */ andl $7, %ecx /* mask alignment bits */ movq %rdi, %rax /* Duplicate destination pointer. */ @@ -36,7 +41,11 @@ ENTRY (strcat) neg %ecx /* We need to align to 8 bytes. */ addl $8,%ecx /* Search the first bytes directly. */ -0: cmpb $0x0,(%rax) /* is byte NUL? */ +0: +#ifdef __CHKP__ + bndcu (%rax), %bnd0 +#endif + cmpb $0x0,(%rax) /* is byte NUL? */ je 2f /* yes => start copy */ incq %rax /* increment pointer */ decl %ecx @@ -48,6 +57,9 @@ ENTRY (strcat) .p2align 4 4: /* First unroll. */ +#ifdef __CHKP__ + bndcu (%rax), %bnd0 +#endif movq (%rax), %rcx /* get double word (= 8 bytes) in question */ addq $8,%rax /* adjust pointer for next word */ movq %r8, %rdx /* magic value */ @@ -62,6 +74,9 @@ ENTRY (strcat) jnz 3f /* found NUL => return pointer */ /* Second unroll. */ +#ifdef __CHKP__ + bndcu (%rax), %bnd0 +#endif movq (%rax), %rcx /* get double word (= 8 bytes) in question */ addq $8,%rax /* adjust pointer for next word */ movq %r8, %rdx /* magic value */ @@ -76,6 +91,9 @@ ENTRY (strcat) jnz 3f /* found NUL => return pointer */ /* Third unroll. */ +#ifdef __CHKP__ + bndcu (%rax), %bnd0 +#endif movq (%rax), %rcx /* get double word (= 8 bytes) in question */ addq $8,%rax /* adjust pointer for next word */ movq %r8, %rdx /* magic value */ @@ -90,6 +108,9 @@ ENTRY (strcat) jnz 3f /* found NUL => return pointer */ /* Fourth unroll. */ +#ifdef __CHKP__ + bndcu (%rax), %bnd0 +#endif movq (%rax), %rcx /* get double word (= 8 bytes) in question */ addq $8,%rax /* adjust pointer for next word */ movq %r8, %rdx /* magic value */ @@ -163,6 +184,9 @@ ENTRY (strcat) .p2align 4 22: /* 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. */ @@ -177,10 +201,16 @@ ENTRY (strcat) jnz 23f /* 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. */ @@ -195,10 +225,16 @@ ENTRY (strcat) jnz 23f /* 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. */ @@ -213,10 +249,16 @@ ENTRY (strcat) jnz 23f /* 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. */ @@ -231,6 +273,9 @@ ENTRY (strcat) jnz 23f /* found NUL => return pointer */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movq %rax, (%rdx) /* Write value to destination. */ addq $8, %rdx /* Adjust pointer. */ jmp 22b /* Next iteration. */ @@ -239,10 +284,16 @@ ENTRY (strcat) The loop is unrolled twice. */ .p2align 4 23: +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movb %al, (%rdx) /* 1st byte. */ testb %al, %al /* Is it NUL. */ jz 24f /* yes, finish. */ incq %rdx /* Increment destination. */ +#ifdef __CHKP__ + bndcu (%rdx), %bnd0 +#endif movb %ah, (%rdx) /* 2nd byte. */ testb %ah, %ah /* Is it NUL?. */ jz 24f /* yes, finish. */ |