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| author | John Baldwin <jhb@FreeBSD.org> | 2020-07-20 09:09:58 -0700 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2020-07-20 09:10:18 -0700 |
| commit | ed810cc7d3252bd8bfdb4303ee6b44293fe6214e (patch) | |
| tree | 93cc390389149769497f84234c5ef0be3b4f092f /gdb/mips-fbsd-tdep.c | |
| parent | ae5369e773c341ab55a130fffb4678bb3595d692 (diff) | |
| download | binutils-ed810cc7d3252bd8bfdb4303ee6b44293fe6214e.zip binutils-ed810cc7d3252bd8bfdb4303ee6b44293fe6214e.tar.gz binutils-ed810cc7d3252bd8bfdb4303ee6b44293fe6214e.tar.bz2 | |
Implement the skip_solib_resolver gdbarch hook for FreeBSD architectures.
The ELF runtime linker on all FreeBSD architectures uses the
"_rtld_bind" entry point for unresolved PTL entries. FreeBSD/mips has
an additional entry point called "_mips_rtld_bind".
gdb/ChangeLog:
* fbsd-tdep.c (fbsd_skip_solib_resolver): New function.
(fbsd_init_abi): Install gdbarch "skip_solib_resolver" method.
* fbsd-tdep.h (fbsd_skip_solib_resolver): New prototype.
* mips-fbsd-tdep.c (mips_fbsd_skip_solib_resolver): New function.
(mips_fbsd_init_abi): Install gdbarch "skip_solib_resolver"
method.
Diffstat (limited to 'gdb/mips-fbsd-tdep.c')
| -rw-r--r-- | gdb/mips-fbsd-tdep.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gdb/mips-fbsd-tdep.c b/gdb/mips-fbsd-tdep.c index abaf7f2..ba666f1 100644 --- a/gdb/mips-fbsd-tdep.c +++ b/gdb/mips-fbsd-tdep.c @@ -462,6 +462,20 @@ static const struct tramp_frame mips64_fbsd_sigframe = /* Shared library support. */ +/* FreeBSD/mips can use an alternate routine in the runtime linker to + resolve functions. */ + +static CORE_ADDR +mips_fbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) +{ + struct bound_minimal_symbol msym + = lookup_bound_minimal_symbol ("_mips_rtld_bind"); + if (msym.minsym != nullptr && BMSYMBOL_VALUE_ADDRESS (msym) == pc) + return frame_unwind_caller_pc (get_current_frame ()); + + return fbsd_skip_solib_resolver (gdbarch, pc); +} + /* FreeBSD/mips uses a slightly different `struct link_map' than the other FreeBSD platforms as it includes an additional `l_off' member. */ @@ -546,6 +560,8 @@ mips_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) set_gdbarch_iterate_over_regset_sections (gdbarch, mips_fbsd_iterate_over_regset_sections); + set_gdbarch_skip_solib_resolver (gdbarch, mips_fbsd_skip_solib_resolver); + /* FreeBSD/mips has SVR4-style shared libraries. */ set_solib_svr4_fetch_link_map_offsets (gdbarch, (gdbarch_ptr_bit (gdbarch) == 32 ? |