Kumar Kartikeya Dwivedi a91ae3c893 bpf, x86: Add support for signed arena loads ... Currently, signed load instructions into arena memory are unsupported. The compiler is free to generate these, and on GCC-14 we see a corresponding error when it happens. The hurdle in supporting them is deciding which unused opcode to use to mark them for the JIT's own consumption. After much thinking, it appears 0xc0 / BPF_NOSPEC can be combined with load instructions to identify signed arena loads. Use this to recognize and JIT them appropriately, and remove the verifier side limitation on the program if the JIT supports them. Co-developed-by: Puranjay Mohan <puranjay@kernel.org> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Link: https://lore.kernel.org/r/20250923110157.18326-2-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2025-09-23 12:00:22 -07:00
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Makefile	bpf, x86: Add x86 JIT support for timed may_goto	2025-03-15 11:48:28 -07:00
bpf_jit_comp.c	bpf, x86: Add support for signed arena loads	2025-09-23 12:00:22 -07:00
bpf_jit_comp32.c	bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()	2024-03-14 19:28:52 -07:00
bpf_timed_may_goto.S	bpf, x86: Fix objtool warning for timed may_goto	2025-03-15 15:55:14 -07:00