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sim: bpf: remove negi, neg32i insns

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The BPF virtual machine does not support neg instructions operating on
immediates, and these erroneous instructions were recently removed from
gas.  Remove them from the simulator as well.
This commit is contained in:
David Faust
2023-08-21 09:36:36 -07:00
parent 41aa80c544
commit 3f3175554f
1 changed files with 0 additions and 8 deletions
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8
sim/bpf/bpf-sim.c
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@@ -730,10 +730,6 @@ execute (SIM_CPU *cpu, struct bpf_insn *insn)
BPF_TRACE ("BPF_INSN_NEGR\n");
bpf_regs[insn->dst] = - (int64_t) bpf_regs[insn->dst];
break;
case BPF_INSN_NEGI:
BPF_TRACE ("BPF_INSN_NEGI\n");
bpf_regs[insn->dst] = - (int64_t) insn->imm32;
break;
case BPF_INSN_LSHR:
BPF_TRACE ("BPF_INSN_LSHR\n");
bpf_regs[insn->dst] <<= bpf_regs[insn->src];
@@ -867,10 +863,6 @@ execute (SIM_CPU *cpu, struct bpf_insn *insn)
BPF_TRACE ("BPF_INSN_NEG32R\n");
bpf_regs[insn->dst] = (uint32_t) (- (int32_t) bpf_regs[insn->dst]);
break;
case BPF_INSN_NEG32I:
BPF_TRACE ("BPF_INSN_NEG32I\n");
bpf_regs[insn->dst] = (uint32_t) - (int32_t) insn->imm32;
break;
case BPF_INSN_LSH32R:
BPF_TRACE ("BPF_INSN_LSH32R\n");
bpf_regs[insn->dst] = (uint32_t) bpf_regs[insn->dst] << bpf_regs[insn->src];