diff options
| author |   Peter Zijlstra <peterz@infradead.org> | 2020-11-26 13:16:55 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-11-26 13:16:55 +0100 |
| commit | 20c7775aecea04d8ca322039969d49dcf568e0e9 (patch) | |
| tree | 138c057839197c9021043353e994815c0250e669 /kernel/bpf/stackmap.c | |
| parent | perf/x86/intel: Add event constraint for CYCLE_ACTIVITY.STALLS_MEM_ANY (diff) | |
| parent | Merge tag 'media/v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media (diff) | |
Merge remote-tracking branch 'origin/master' into perf/core
Further perf/core patches will depend on:
d3f7b1bb2040 ("mm/gup: fix gup_fast with dynamic page table folding")
which is already in Linus' tree.
Diffstat (limited to 'kernel/bpf/stackmap.c')
| -rw-r--r-- | kernel/bpf/stackmap.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index 4fd830a62be2..06065fa27124 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -213,11 +213,13 @@ static int stack_map_get_build_id_32(void *page_addr, phdr = (Elf32_Phdr *)(page_addr + sizeof(Elf32_Ehdr)); - for (i = 0; i < ehdr->e_phnum; ++i) - if (phdr[i].p_type == PT_NOTE) - return stack_map_parse_build_id(page_addr, build_id, - page_addr + phdr[i].p_offset, - phdr[i].p_filesz); + for (i = 0; i < ehdr->e_phnum; ++i) { + if (phdr[i].p_type == PT_NOTE && + !stack_map_parse_build_id(page_addr, build_id, + page_addr + phdr[i].p_offset, + phdr[i].p_filesz)) + return 0; + } return -EINVAL; } @@ -236,11 +238,13 @@ static int stack_map_get_build_id_64(void *page_addr, phdr = (Elf64_Phdr *)(page_addr + sizeof(Elf64_Ehdr)); - for (i = 0; i < ehdr->e_phnum; ++i) - if (phdr[i].p_type == PT_NOTE) - return stack_map_parse_build_id(page_addr, build_id, - page_addr + phdr[i].p_offset, - phdr[i].p_filesz); + for (i = 0; i < ehdr->e_phnum; ++i) { + if (phdr[i].p_type == PT_NOTE && + !stack_map_parse_build_id(page_addr, build_id, + page_addr + phdr[i].p_offset, + phdr[i].p_filesz)) + return 0; + } return -EINVAL; } @@ -661,18 +665,17 @@ BPF_CALL_4(bpf_get_task_stack, struct task_struct *, task, void *, buf, return __bpf_get_stack(regs, task, NULL, buf, size, flags); } -BTF_ID_LIST(bpf_get_task_stack_btf_ids) -BTF_ID(struct, task_struct) +BTF_ID_LIST_SINGLE(bpf_get_task_stack_btf_ids, struct, task_struct) const struct bpf_func_proto bpf_get_task_stack_proto = { .func = bpf_get_task_stack, .gpl_only = false, .ret_type = RET_INTEGER, .arg1_type = ARG_PTR_TO_BTF_ID, + .arg1_btf_id = &bpf_get_task_stack_btf_ids[0], .arg2_type = ARG_PTR_TO_UNINIT_MEM, .arg3_type = ARG_CONST_SIZE_OR_ZERO, .arg4_type = ARG_ANYTHING, - .btf_id = bpf_get_task_stack_btf_ids, }; BPF_CALL_4(bpf_get_stack_pe, struct bpf_perf_event_data_kern *, ctx, @@ -835,6 +838,7 @@ static void stack_map_free(struct bpf_map *map) static int stack_trace_map_btf_id; const struct bpf_map_ops stack_trace_map_ops = { + .map_meta_equal = bpf_map_meta_equal, .map_alloc = stack_map_alloc, .map_free = stack_map_free, .map_get_next_key = stack_map_get_next_key, |