| 18cf8168ef34750ffae6451bded31ff06d2d2763 |
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29-Oct-2015 |
Christopher Ferris <cferris@google.com> |
Add a size when checking local reads/writes.
When doing a local unwind and checking whether a read or a write is valid,
the length of the read/write is not checked. This can lead to crashes if
attempting to read from within a map, but it would cross into out of the
map.
The fix is to check the size of the read/write.
Bug: 25371801
Change-Id: I52556cec06268ce3be5a6fb718147ba62c0a489f
/external/libunwind/src/ppc32/Ginit.c
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| ae38b20031a02d3f6f56a8315c1f097ae5293c56 |
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04-May-2015 |
Christopher Ferris <cferris@google.com> |
Implement method to read elf data from memory.
I rewrote the entirety of elfxx.h/elfxx.c to support this.
For the rewrite, I modified the way that the symbol tables are searched.
The searched every single entry in the symbol table, and all symbol tables.
The new method finds the first entry that actually has a name and stops.
I also added some quick checks to make sure that a malformed elf would
not cause a crash when reading the symbol names from the symbol tables.
I had to implement the functionality of dwarf_find_unwind_table to handle
reading from memory, instead of from a file. I didn't implement debug frame
support since that likelihood of that appearing in memory seems low.
I also modified the dwarf_find_unwind_table to remove an abort and just
fail if that particular path is encountered. In addition, I added a quick
check to make sure that a malformed dynamic section doesn't cause a crash.
Bug: 19517541
Change-Id: I6075d87035dca41fa5e5dfcbe287a680a7671836
/external/libunwind/src/ppc32/Ginit.c
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| f4a8df5f4f338f1a12c25213227e98b34b42447f |
|
08-Mar-2014 |
Christopher Ferris <cferris@google.com> |
Fix maps caching for local processes.
It is possible for the map to change while running libunwind. For example,
if lots of threads are doing local unwinds at the same time. Allow the
cached map to regenerate when it detects this case.
Included in this change is a refactor of all of the os code so that it can
also be used to do caching. This is a prelude to being able to attempt to
push the code upstream.
Also, this moves the code back closer to the original upstream code.
Hopefully, this will allow me to upstream all of these changes.
Change-Id: Ia219fa61e16e36416133bc95b1dd2161bd5b8ff7
/external/libunwind/src/ppc32/Ginit.c
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| cdf9ee587b78148c5d48dae1b5ea72ec8df64c96 |
|
23-Nov-2013 |
Christopher Ferris <cferris@google.com> |
Only check the map for local unwinds.
Change-Id: I7b7eed29a1b7ddad8e0d852598260809d3eb98d1
/external/libunwind/src/ppc32/Ginit.c
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| 7d46a21e0a2cb561e4cad57b101a7137e01023dc |
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14-Nov-2013 |
Christopher Ferris <cferris@google.com> |
For current process, check memory accesses.
When attempting to unwind the current process, the library simple reads and
writes to memory for memory accesses. Unfortunately, if an unwind winds up
with invalid data, then the process can segfault. Add a guard to all memory
accesses that verifies that reads/writes are valid before attempting them.
For now, this guard is a nop on all systems except linux systems.
Also, modify the adjust_ip function to use the access_mem function
so that all reads go through the right function.
Bug: 11652982
Change-Id: I9d1feacae585374f6bf1d899f8a006ec9ecb47c4
/external/libunwind/src/ppc32/Ginit.c
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| 6023ccf6677fa030c001fcccc903c6ded9ffc47e |
|
12-Sep-2012 |
Tommi Rantala <tt.rantala@gmail.com> |
PPC: remove unused `PAGE_START' macro from Ginit.c
/external/libunwind/src/ppc32/Ginit.c
|
| 9ea6af8ed5ee7b07f8de6d774bc6df2b7320f0e8 |
|
08-Oct-2007 |
Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> |
[PPC32] Make PPC32 unwinding work for real.
/external/libunwind/src/ppc32/Ginit.c
|
| 4499bb29a6214b5df5b3b21e03c6b4f3c8f26cfd |
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13-Sep-2007 |
Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> |
[PPC32] First check-in to add preliminary support for Linux/PPC32.
/external/libunwind/src/ppc32/Ginit.c
|