lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 30 Apr 2015 10:52:36 +0000 From: Wang Nan <wangnan0@...wei.com> To: <ast@...mgrid.com>, <davem@...emloft.net>, <acme@...nel.org>, <mingo@...hat.com>, <a.p.zijlstra@...llo.nl>, <masami.hiramatsu.pt@...achi.com>, <jolsa@...nel.org> CC: <lizefan@...nel.org>, <linux-kernel@...r.kernel.org>, <pi3orama@....com>, <hekuang@...wei.com> Subject: [RFC PATCH 13/22] perf bpf: collects relocation sections from object file. This patch collects relocation sections into 'struct obj'. Such sections are used for associating maps with bpf programs. Signed-off-by: Wang Nan <wangnan0@...wei.com> --- tools/perf/util/bpf-loader.c | 17 +++++++++++++++++ tools/perf/util/bpf-loader.h | 5 +++++ 2 files changed, 22 insertions(+) diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index bbebaf1..66fbca2 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -46,6 +46,10 @@ static void bpf_obj_clear_elf(struct bpf_obj *obj) if (!obj_elf_valid(obj)) return; + if (obj->elf.reloc) { + free(obj->elf.reloc); + obj->elf.reloc = NULL; + } if (obj->elf.elf) { elf_end(obj->elf.elf); obj->elf.elf = NULL; @@ -413,6 +417,19 @@ static int bpf_obj_elf_collect(struct bpf_obj *obj) prog->name); list_add(&prog->list, &obj->progs_list); } + } else if (sh.sh_type == SHT_REL) { + obj->elf.reloc = realloc(obj->elf.reloc, + sizeof(*obj->elf.reloc) * + (++obj->elf.nr_reloc)); + if (!obj->elf.reloc) { + pr_err("bpf: realloc reloc record failed\n"); + err = -ENOMEM; + } else { + int n = obj->elf.nr_reloc - 1; + + obj->elf.reloc[n].shdr = sh; + obj->elf.reloc[n].data = data; + } } if (err) goto out; diff --git a/tools/perf/util/bpf-loader.h b/tools/perf/util/bpf-loader.h index f9cb46b..1417c0d 100644 --- a/tools/perf/util/bpf-loader.h +++ b/tools/perf/util/bpf-loader.h @@ -53,6 +53,11 @@ struct bpf_obj { Elf *elf; GElf_Ehdr ehdr; Elf_Data *symbols; + struct { + GElf_Shdr shdr; + Elf_Data *data; + } *reloc; + int nr_reloc; } elf; }; #define obj_elf_valid(o) ((o)->elf.fd >= 0) -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists