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| author | Markus Metzger <markus.t.metzger@intel.com> | 2021-10-04 10:24:35 +0200 |
|---|---|---|
| committer | Markus Metzger <markus.t.metzger@intel.com> | 2022-10-18 14:16:08 +0200 |
| commit | 8d56636a0ecbe6c38bf52b0683326ee21693c548 (patch) | |
| tree | d31ea425eab963a5849039435427ea2880dba1c2 /gdb/linux-tdep.c | |
| parent | 60d09f0a0d8000359b8f1dd14b51e7f013ea9e5c (diff) | |
| download | fsf-binutils-gdb-8d56636a0ecbe6c38bf52b0683326ee21693c548.zip fsf-binutils-gdb-8d56636a0ecbe6c38bf52b0683326ee21693c548.tar.gz fsf-binutils-gdb-8d56636a0ecbe6c38bf52b0683326ee21693c548.tar.bz2 | |
gdb, gdbserver: support dlmopen()
In glibc, the r_debug structure contains (amongst others) the following
fields:
int r_version:
Version number for this protocol. It should be greater than 0.
If r_version is 2, struct r_debug is extended to struct r_debug_extended
with one additional field:
struct r_debug_extended *r_next;
Link to the next r_debug_extended structure. Each r_debug_extended
structure represents a different namespace. The first r_debug_extended
structure is for the default namespace.
1. Change solib_svr4_r_map argument to take the debug base.
2. Add solib_svr4_r_next to find the link map in the next namespace from
the r_next field.
3. Update svr4_current_sos_direct to get the link map in the next namespace
from the r_next field.
4. Don't check shared libraries in other namespaces when updating shared
libraries in a new namespace.
5. Update svr4_same to check the load offset in addition to the name
6. Update svr4_default_sos to also set l_addr_inferior
7. Change the flat solib_list into a per-namespace list using the
namespace's r_debug address to identify the namespace.
Add gdb.base/dlmopen.exp to test this.
To remain backwards compatible with older gdbserver, we reserve the
namespace zero for a flat list of solibs from all namespaces. Subsequent
patches will extend RSP to allow listing libraries grouped by namespace.
This fixes PR 11839.
Co-authored-by: Lu, Hongjiu <hongjiu.lu@intel.com>
Diffstat (limited to 'gdb/linux-tdep.c')
| -rw-r--r-- | gdb/linux-tdep.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c index dccb45d..0a2fced 100644 --- a/gdb/linux-tdep.c +++ b/gdb/linux-tdep.c @@ -2826,6 +2826,7 @@ linux_ilp32_fetch_link_map_offsets () lmo.r_map_offset = 4; lmo.r_brk_offset = 8; lmo.r_ldsomap_offset = -1; + lmo.r_next_offset = 20; /* Everything we need is in the first 20 bytes. */ lmo.link_map_size = 20; @@ -2854,6 +2855,7 @@ linux_lp64_fetch_link_map_offsets () lmo.r_map_offset = 8; lmo.r_brk_offset = 16; lmo.r_ldsomap_offset = -1; + lmo.r_next_offset = 40; /* Everything we need is in the first 40 bytes. */ lmo.link_map_size = 40; |