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| author | Jose E. Marchesi <jose.marchesi@oracle.com> | 2023-07-24 01:15:08 +0200 |
|---|---|---|
| committer | Jose E. Marchesi <jose.marchesi@oracle.com> | 2023-07-24 01:20:03 +0200 |
| commit | c2ca88d74ba3618c4aac6744e923c279ca4cb7f1 (patch) | |
| tree | cdd500a8a997bd1a8f908176d8f5fe4143d0542d /include | |
| parent | 338b21b0881e16bb7116e4eb5bc41817f805ec23 (diff) | |
| download | gdb-c2ca88d74ba3618c4aac6744e923c279ca4cb7f1.zip gdb-c2ca88d74ba3618c4aac6744e923c279ca4cb7f1.tar.gz gdb-c2ca88d74ba3618c4aac6744e923c279ca4cb7f1.tar.bz2 | |
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.
Diffstat (limited to 'include')
| -rw-r--r-- | include/ChangeLog | 5 | ||||
| -rw-r--r-- | include/opcode/bpf.h | 3 |
2 files changed, 7 insertions, 1 deletions
diff --git a/include/ChangeLog b/include/ChangeLog index ccf1661..8cad8e2 100644 --- a/include/ChangeLog +++ b/include/ChangeLog @@ -1,3 +1,8 @@ +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. + 2023-07-21 Jose E. Marchesi <jose.marchesi@oracle.com> * opcode/bpf.h (enum bpf_insn_id): Add entries for signed load diff --git a/include/opcode/bpf.h b/include/opcode/bpf.h index a491df6..dc1b6e7 100644 --- a/include/opcode/bpf.h +++ b/include/opcode/bpf.h @@ -201,7 +201,8 @@ enum bpf_insn_id BPF_INSN_JEQI, BPF_INSN_JGTI, BPF_INSN_JSGTI, BPF_INSN_JGEI, BPF_INSN_JSGEI, BPF_INSN_JLTI, BPF_INSN_JSLTI, BPF_INSN_JSLEI, BPF_INSN_JLEI, BPF_INSN_JSETI, BPF_INSN_JNEI, - BPF_INSN_CALLI, + /* jump-always with 32-bit offset. */ + BPF_INSN_JAL, /* 32-bit compare-and-jump instructions (reg OP reg.) */ BPF_INSN_JEQ32R, BPF_INSN_JGT32R, BPF_INSN_JSGT32R, BPF_INSN_JGE32R, BPF_INSN_JSGE32R, BPF_INSN_JLT32R, BPF_INSN_JSLT32R, |