lkml.org 
[lkml]   [2015]   [May]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC PATCH v3 15/37] bpf tools: Collect symbol table from SHT_SYMTAB section
    Date
    This patch collects symbols section. This section is useful when
    linking ELF maps.

    Signed-off-by: Wang Nan <wangnan0@huawei.com>
    ---
    tools/lib/bpf/libbpf.c | 11 +++++++++++
    1 file changed, 11 insertions(+)

    diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
    index 43b22a5..2068f0b 100644
    --- a/tools/lib/bpf/libbpf.c
    +++ b/tools/lib/bpf/libbpf.c
    @@ -94,6 +94,7 @@ struct bpf_object {
    int fd;
    Elf *elf;
    GElf_Ehdr ehdr;
    + Elf_Data *symbols;
    } elf;
    };
    #define obj_elf_valid(o) ((o)->elf.fd >= 0)
    @@ -142,6 +143,8 @@ static void bpf_obj_clear_elf(struct bpf_object *obj)
    elf_end(obj->elf.elf);
    obj->elf.elf = NULL;
    }
    + obj->elf.symbols = NULL;
    +
    if (obj->elf.fd >= 0) {
    close(obj->elf.fd);
    obj->elf.fd = -1;
    @@ -370,6 +373,14 @@ static int bpf_obj_elf_collect(struct bpf_object *obj)
    else if (strcmp(name, "config") == 0)
    err = bpf_obj_config_init(obj, data->d_buf,
    data->d_size);
    + else if (sh.sh_type == SHT_SYMTAB) {
    + if (obj->elf.symbols) {
    + pr_warning("bpf: multiple SYMTAB in %s\n",
    + obj->path);
    + err = -EEXIST;
    + } else
    + obj->elf.symbols = data;
    + }
    if (err)
    goto out;
    }
    --
    1.8.3.4


    \
     
     \ /
      Last update: 2015-05-17 13:21    [W:6.756 / U:0.044 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site