29db4bea1d
Make relo_core.c to be compiled for the kernel and for user space libbpf.
Note the patch is reducing BPF_CORE_SPEC_MAX_LEN from 64 to 32.
This is the maximum number of nested structs and arrays.
For example:
struct sample {
int a;
struct {
int b[10];
};
};
struct sample *s = ...;
int *y = &s->b[5];
This field access is encoded as "0:1:0:5" and spec len is 4.
The follow up patch might bump it back to 64.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211201181040.23337-4-alexei.starovoitov@gmail.com
43 lines
1.6 KiB
Makefile
43 lines
1.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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obj-y := core.o
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ifneq ($(CONFIG_BPF_JIT_ALWAYS_ON),y)
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# ___bpf_prog_run() needs GCSE disabled on x86; see 3193c0836f203 for details
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cflags-nogcse-$(CONFIG_X86)$(CONFIG_CC_IS_GCC) := -fno-gcse
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endif
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CFLAGS_core.o += $(call cc-disable-warning, override-init) $(cflags-nogcse-yy)
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obj-$(CONFIG_BPF_SYSCALL) += syscall.o verifier.o inode.o helpers.o tnum.o bpf_iter.o map_iter.o task_iter.o prog_iter.o
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obj-$(CONFIG_BPF_SYSCALL) += hashtab.o arraymap.o percpu_freelist.o bpf_lru_list.o lpm_trie.o map_in_map.o bloom_filter.o
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obj-$(CONFIG_BPF_SYSCALL) += local_storage.o queue_stack_maps.o ringbuf.o
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obj-$(CONFIG_BPF_SYSCALL) += bpf_local_storage.o bpf_task_storage.o
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obj-${CONFIG_BPF_LSM} += bpf_inode_storage.o
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obj-$(CONFIG_BPF_SYSCALL) += disasm.o
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obj-$(CONFIG_BPF_JIT) += trampoline.o
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obj-$(CONFIG_BPF_SYSCALL) += btf.o
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obj-$(CONFIG_BPF_JIT) += dispatcher.o
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ifeq ($(CONFIG_NET),y)
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obj-$(CONFIG_BPF_SYSCALL) += devmap.o
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obj-$(CONFIG_BPF_SYSCALL) += cpumap.o
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obj-$(CONFIG_BPF_SYSCALL) += offload.o
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obj-$(CONFIG_BPF_SYSCALL) += net_namespace.o
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endif
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ifeq ($(CONFIG_PERF_EVENTS),y)
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obj-$(CONFIG_BPF_SYSCALL) += stackmap.o
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endif
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obj-$(CONFIG_CGROUP_BPF) += cgroup.o
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ifeq ($(CONFIG_INET),y)
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obj-$(CONFIG_BPF_SYSCALL) += reuseport_array.o
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endif
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ifeq ($(CONFIG_SYSFS),y)
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obj-$(CONFIG_DEBUG_INFO_BTF) += sysfs_btf.o
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endif
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ifeq ($(CONFIG_BPF_JIT),y)
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obj-$(CONFIG_BPF_SYSCALL) += bpf_struct_ops.o
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obj-${CONFIG_BPF_LSM} += bpf_lsm.o
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endif
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obj-$(CONFIG_BPF_PRELOAD) += preload/
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obj-$(CONFIG_BPF_SYSCALL) += relo_core.o
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$(obj)/relo_core.o: $(srctree)/tools/lib/bpf/relo_core.c FORCE
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$(call if_changed_rule,cc_o_c)
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