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authorMaciej W. Rozycki <macro@imgtec.com>2017-08-07 17:02:04 +0100
committerMaciej W. Rozycki <macro@imgtec.com>2017-08-07 17:02:04 +0100
commitba7b109b296feac8cf8cab74db5f824dfa631610 (patch)
tree50468ccc26db264428129deb47848ffa5ae877a4 /gdb/mem-break.c
parentb28b8b5e31903f59b00a4664b8204409e1e5bb91 (diff)
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PR breakpoints/21886: mem-break: Fix breakpoint insertion location
Fix a commit cd6c3b4ffc4e ("New gdbarch methods breakpoint_kind_from_pc and sw_breakpoint_from_kind") regression and restore the use of `->placed_address' rather than `->reqstd_address' as the location for a memory breakpoint to be inserted at. Previously `gdbarch_breakpoint_from_pc' was used that made that adjustment in `default_memory_insert_breakpoint' from the preinitialized value, however with the said commit that call is gone, so the passed `->placed_address' has to be used for the initialization. The regression manifests itself as the inability to debug any MIPS/Linux compressed ISA dynamic executable as GDB corrupts the dynamic loader with one of its implicit breakpoints, causing the program to crash, as seen for example with the `mips-linux-gnu' target, o32 ABI, MIPS16 code, and the gdb.base/advance.exp test case: (gdb) continue Continuing. Program received signal SIGBUS, Bus error. _dl_debug_initialize (ldbase=0, ns=0) at dl-debug.c:51 51 r = &_r_debug; (gdb) FAIL: gdb.base/advance.exp: Can't run to main gdb/ PR breakpoints/21886 * mem-break.c (default_memory_insert_breakpoint): Use `->placed_address' rather than `->reqstd_address' for the breakpoint location.
Diffstat (limited to 'gdb/mem-break.c')
-rw-r--r--gdb/mem-break.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/gdb/mem-break.c b/gdb/mem-break.c
index f87eea4..e35d0a5 100644
--- a/gdb/mem-break.c
+++ b/gdb/mem-break.c
@@ -37,7 +37,7 @@ int
default_memory_insert_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt)
{
- CORE_ADDR addr = bp_tgt->reqstd_address;
+ CORE_ADDR addr = bp_tgt->placed_address;
const unsigned char *bp;
gdb_byte *readbuf;
int bplen;