diff options
Diffstat (limited to 'gdb/corelow.c')
| -rw-r--r-- | gdb/corelow.c | 47 |
1 files changed, 41 insertions, 6 deletions
diff --git a/gdb/corelow.c b/gdb/corelow.c index 5697a02dc14..31d313860b4 100644 --- a/gdb/corelow.c +++ b/gdb/corelow.c @@ -87,7 +87,7 @@ public: const char *thread_name (struct thread_info *) override; - bool has_all_memory () override { return false; } + bool has_all_memory () override { return true; } bool has_memory () override; bool has_stack () override; bool has_registers () override; @@ -614,12 +614,47 @@ core_target::xfer_partial (enum target_object object, const char *annex, switch (object) { case TARGET_OBJECT_MEMORY: - return (section_table_xfer_memory_partial - (readbuf, writebuf, - offset, len, xfered_len, - m_core_section_table.sections, - m_core_section_table.sections_end)); + { + enum target_xfer_status xfer_status; + + /* Try accessing memory contents from core file data, + restricting consideration to those sections for which + the BFD section flag SEC_HAS_CONTENTS is set. */ + auto has_contents_cb = [] (const struct target_section *s) + { + return ((s->the_bfd_section->flags & SEC_HAS_CONTENTS) != 0); + }; + xfer_status = section_table_xfer_memory_partial + (readbuf, writebuf, + offset, len, xfered_len, + m_core_section_table.sections, + m_core_section_table.sections_end, + has_contents_cb); + if (xfer_status == TARGET_XFER_OK) + return TARGET_XFER_OK; + + /* Now check the stratum beneath us; this should be file_stratum. */ + xfer_status = this->beneath ()->xfer_partial (object, annex, readbuf, + writebuf, offset, len, + xfered_len); + if (xfer_status == TARGET_XFER_OK) + return TARGET_XFER_OK; + /* Finally, attempt to access data in core file sections with + no contents. These will typically read as all zero. */ + auto no_contents_cb = [&] (const struct target_section *s) + { + return !has_contents_cb (s); + }; + xfer_status = section_table_xfer_memory_partial + (readbuf, writebuf, + offset, len, xfered_len, + m_core_section_table.sections, + m_core_section_table.sections_end, + no_contents_cb); + + return xfer_status; + } case TARGET_OBJECT_AUXV: if (readbuf) { |