tree cdd500a8a997bd1a8f908176d8f5fe4143d0542d
parent 338b21b0881e16bb7116e4eb5bc41817f805ec23
author Jose E. Marchesi <jose.marchesi@oracle.com> 1690154108 +0200
committer Jose E. Marchesi <jose.marchesi@oracle.com> 1690154403 +0200

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  <jose.marchesi@oracle.com>

	* 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  <jose.marchesi@oracle.com>

	* 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  <jose.marchesi@oracle.com>

	* 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  <jose.marchesi@oracle.com>

	* bpf-opc.c (bpf_opcodes): Add entry for jal.