cjacek wrote:
GCC offers the `ms_hook_prologue` function attribute as an alternative. It
provides similar guarantees: it inserts a hardcoded prologue and adds padding.
However, it applies on a per-function basis, so there isn’t an easy way to make
the entire module hotpatchable. In GCC, the padding is handled directly by the
compiler, with no linker involvement, which emits assembly like:
```
.globl _func
.def _func; .scl 2; .type 32; .endef
.long 0xcccccccc
.long 0xcccccccc
.long 0xcccccccc
.long 0xcccccccc
_func:
.byte 0x8b, 0xff, 0x55, 0x8b, 0xec
movl $1, %eax
popl %ebp
ret
```
https://github.com/llvm/llvm-project/pull/116512
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