From c2ca88d74ba3618c4aac6744e923c279ca4cb7f1 Mon Sep 17 00:00:00 2001 From: "Jose E. Marchesi" Date: Mon, 24 Jul 2023 01:15:08 +0200 Subject: bpf: add support for jal/gotol jump instruction with 32-bit target This patch adds support for the V4 BPF instruction jal/gotol, which is like ja/goto but it supports a signed 32-bit PC-relative (in number of 64-bit words minus one) target operand instead of the 16-bit signed operand of the other instruction. This greatly increases the jump range in BPF programs. Tested in bpf-unkown-none. bfd/ChangeLog: 2023-07-24 Jose E. Marchesi * reloc.c: New reloc BFD_RELOC_BPF_DISPCALL32. * elf64-bpf.c (bpf_reloc_type_lookup): Handle the new reloc. * libbfd.h (bfd_reloc_code_real_names): Regenerate. gas/ChangeLog: 2023-07-24 Jose E. Marchesi * config/tc-bpf.c (struct bpf_insn): New field `id'. (md_assemble): Save the ids of successfully parsed instructions and use the new BFD_RELOC_BPF_DISPCALL32 whenever appropriate. (md_apply_fix): Adapt to the new BFD reloc. * testsuite/gas/bpf/jump.s: Test JAL. * testsuite/gas/bpf/jump.d: Likewise. * testsuite/gas/bpf/jump-pseudoc.d: Likewise. * testsuite/gas/bpf/jump-be.d: Likewise. * testsuite/gas/bpf/jump-be-pseudoc.d: Likewise. * doc/c-bpf.texi (BPF Instructions): Document new instruction jal/gotol. Document new operand type disp32. include/ChangeLog: 2023-07-24 Jose E. Marchesi * opcode/bpf.h (enum bpf_insn_id): Add entry BPF_INSN_JAL. (enum bpf_insn_id): Remove spurious entry BPF_INSN_CALLI. opcodes/ChangeLog: 2023-07-23 Jose E. Marchesi * bpf-opc.c (bpf_opcodes): Add entry for jal. --- bfd/libbfd.h | 1 + 1 file changed, 1 insertion(+) (limited to 'bfd/libbfd.h') diff --git a/bfd/libbfd.h b/bfd/libbfd.h index 5dbb087..1fc88a8 100644 --- a/bfd/libbfd.h +++ b/bfd/libbfd.h @@ -3346,6 +3346,7 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@", "BFD_RELOC_TILEGX_IMM8_Y1_TLS_ADD", "BFD_RELOC_BPF_64", "BFD_RELOC_BPF_DISP32", + "BFD_RELOC_BPF_DISPCALL32", "BFD_RELOC_BPF_DISP16", "BFD_RELOC_EPIPHANY_SIMM8", "BFD_RELOC_EPIPHANY_SIMM24", -- cgit v1.1