Jiri Olsa f92c1e1836 bpf: Add get_func_[arg|ret|arg_cnt] helpers ... Adding following helpers for tracing programs: Get n-th argument of the traced function: long bpf_get_func_arg(void *ctx, u32 n, u64 *value) Get return value of the traced function: long bpf_get_func_ret(void *ctx, u64 *value) Get arguments count of the traced function: long bpf_get_func_arg_cnt(void *ctx) The trampoline now stores number of arguments on ctx-8 address, so it's easy to verify argument index and find return value argument's position. Moving function ip address on the trampoline stack behind the number of functions arguments, so it's now stored on ctx-16 address if it's needed. All helpers above are inlined by verifier. Also bit unrelated small change - using newly added function bpf_prog_has_trampoline in check_get_func_ip. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211208193245.172141-5-jolsa@kernel.org		2021-12-13 09:25:59 -08:00
..
preload	bpf/preload: Clean up .gitignore and "clean-files" target	2021-10-20 10:39:04 -07:00
arraymap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-10-28 10:43:58 -07:00
bloom_filter.c	bpf: Add missing map_delete_elem method to bloom filter map	2021-11-01 14:22:44 -07:00
bpf_inode_storage.c	bpf: Fix spelling mistakes	2021-05-24 21:13:05 -07:00
bpf_iter.c	bpf: Add bpf_loop helper	2021-11-30 10:56:28 -08:00
bpf_local_storage.c	bpf: Prevent deadlock from recursive bpf_task_storage_[get|delete]	2021-02-26 11:51:48 -08:00
bpf_lru_list.c	bpf_lru_list: Read double-checked variable once without lock	2021-02-10 15:54:26 -08:00
bpf_lru_list.h	bpf: Fix a typo "inacitve" -> "inactive"	2020-04-06 21:54:10 +02:00
bpf_lsm.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-06-17 11:54:56 -07:00
bpf_struct_ops_types.h	bpf: Add dummy BPF STRUCT_OPS for test purpose	2021-11-01 14:10:00 -07:00
bpf_struct_ops.c	bpf: Rename btf_member accessors.	2021-12-02 11:18:34 -08:00
bpf_task_storage.c	bpf: Introduce btf_tracing_ids	2021-11-12 10:19:09 -08:00
btf.c	bpf: Allow access to int pointer arguments in tracing programs	2021-12-13 09:24:21 -08:00
cgroup.c	bpf: Forbid bpf_ktime_get_coarse_ns and bpf_timer_* in tracing progs	2021-11-15 20:35:58 -08:00
core.c	bpf, docs: Prune all references to "internal BPF"	2021-11-30 10:52:11 -08:00
cpumap.c	bpf: cpumap: Implement generic cpumap	2021-07-07 20:01:45 -07:00
devmap.c	bpf, devmap: Exclude XDP broadcast to master device	2021-08-09 23:25:14 +02:00
disasm.c	bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause	2021-09-02 14:49:23 +02:00
disasm.h	bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause	2021-09-02 14:49:23 +02:00
dispatcher.c	bpf: Remove bpf_image tree	2020-03-13 12:49:52 -07:00
hashtab.c	bpf: Replace callers of BPF_CAST_CALL with proper function typedef	2021-09-28 16:27:18 -07:00
helpers.c	bpf: Add bpf_strncmp helper	2021-12-11 17:40:23 -08:00
inode.c	bpf: Fix regression on BPF_OBJ_GET with non-O_RDWR flags	2021-06-22 14:57:43 +02:00
Kconfig	bpf: Disallow unprivileged bpf by default	2021-11-01 17:06:47 +01:00
local_storage.c	bpf: Increase supported cgroup storage value size	2021-07-27 15:59:29 -07:00
lpm_trie.c	bpf: Allow RCU-protected lookups to happen from bh context	2021-06-24 19:41:15 +02:00
Makefile	bpf: Prepare relo_core.c for kernel duty.	2021-12-02 11:18:34 -08:00
map_in_map.c	bpf: Remember BTF of inner maps.	2021-07-15 22:31:10 +02:00
map_in_map.h	bpf: Add map_meta_equal map ops	2020-08-28 15:41:30 +02:00
map_iter.c	bpf: Implement link_query callbacks in map element iterators	2020-08-21 14:01:39 -07:00
mmap_unlock_work.h	bpf: Introduce helper bpf_find_vma	2021-11-07 11:54:51 -08:00
net_namespace.c	bpf: Add support for forced LINK_DETACH command	2020-08-01 20:38:28 -07:00
offload.c	bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill	2020-02-17 16:53:49 +01:00
percpu_freelist.c	bpf: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI	2020-10-06 00:04:11 +02:00
percpu_freelist.h	bpf: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI	2020-10-06 00:04:11 +02:00
prog_iter.c	bpf: Refactor bpf_iter_reg to have separate seq_info member	2020-07-25 20:16:32 -07:00
queue_stack_maps.c	bpf: Eliminate rlimit-based memory accounting for queue_stack_maps maps	2020-12-02 18:32:46 -08:00
reuseport_array.c	bpf: Fix spelling mistakes	2021-05-24 21:13:05 -07:00
ringbuf.c	bpf: Fix false positive kmemleak report in bpf_ringbuf_area_alloc()	2021-06-28 15:57:46 +02:00
stackmap.c	bpf: Introduce btf_tracing_ids	2021-11-12 10:19:09 -08:00
syscall.c	Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-12-10 15:56:13 -08:00
sysfs_btf.c	bpf: Load and verify kernel module BTFs	2020-11-10 15:25:53 -08:00
task_iter.c	bpf: Introduce btf_tracing_ids	2021-11-12 10:19:09 -08:00
tnum.c	bpf, tnums: Provably sound, faster, and more precise algorithm for tnum_mul	2021-06-01 13:34:15 +02:00
trampoline.c	bpf: Add get_func_[arg|ret|arg_cnt] helpers	2021-12-13 09:25:59 -08:00
verifier.c	bpf: Add get_func_[arg|ret|arg_cnt] helpers	2021-12-13 09:25:59 -08:00