espressif/binutils-gdb
1
0
Fork 0
mirror of https://github.com/espressif/binutils-gdb.git synced 2025-06-19 00:59:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

gdb/rs6000: Read backchain as unsigned.

Browse Source 
Previously, backchain was read as a signed quantity, resulting in
addresses like 0xfffffffffffeded0 instead of 0xfffeded0 returned by
unwinder on 32-bit powerpc.  While normally such addresses are masked
off, this causes problems for tracepoints, since 0xfffffffffffeded0
is considered unavailable.

Fixes a test failure in gdb.trace/entry-values.exp.

gdb/ChangeLog:

	* corefile.c (safe_read_memory_unsigned_integer): New function.
	* gdbcore.h (safe_read_memory_unsigned_integer): New prototype.
	* rs6000-tdep.c (rs6000_frame_cache): Read backchain as unsigned.
This commit is contained in:
Marcin Kościelnicki
2016-03-06 16:38:52 +01:00
parent a67914defb
commit cc2c4da881
4 changed files with 30 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
gdb/rs6000-tdep.c
View File

@ -3336,10 +3336,10 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache)
if (!fdata.frameless)
{
/* Frameless really means stackless. */
LONGEST backchain;
ULONGEST backchain;
if (safe_read_memory_integer (cache->base, wordsize,
byte_order, &backchain))
if (safe_read_memory_unsigned_integer (cache->base, wordsize,
byte_order, &backchain))
cache->base = (CORE_ADDR) backchain;
}