search for: __typeid_typeid3_bitmask

Displaying 2 results from an estimated 2 matches for "__typeid_typeid3_bitmask".

2016 Oct 26
2
RFC: a more detailed design for ThinLTO + vcall CFI
...references. Here is what the asm code may look like: baz: leaq __typeid_typeid3_global_addr(%rip), %rax subl %eax, %edi rorl $__typeid_typeid3_rotate_count, %edi cmpl $__typeid_typeid3_size, %edi ja .LBB2_1 movslq %edi, %rax leaq __typeid_typeid3_byte_array(%rip), %rcx movb (%rax,%rcx), %al andb $__typeid_typeid3_bitmask, %al shrb %al retq .LBB2_1: xorl %eax, %eax retq The appropriate representation for this at the IR level is the subject of the RFC entitled 'Absolute or "fixed address" symbols as immediate operands'. We can imagine, though, that it could look something like this: @__typeid_type...
2016 Oct 28
0
RFC: a more detailed design for ThinLTO + vcall CFI
...> baz: > leaq __typeid_typeid3_global_addr(%rip), %rax > subl %eax, %edi > rorl $__typeid_typeid3_rotate_count, %edi > cmpl $__typeid_typeid3_size, %edi > ja .LBB2_1 > > movslq %edi, %rax > leaq __typeid_typeid3_byte_array(%rip), %rcx > movb (%rax,%rcx), %al > andb $__typeid_typeid3_bitmask, %al > shrb %al > retq > .LBB2_1: > xorl %eax, %eax > retq > > The appropriate representation for this at the IR level is the subject of > the RFC entitled 'Absolute or "fixed address" symbols as immediate > operands'. We can imagine, though, that it cou...