diff options
Diffstat (limited to 'gdb/dwarf2/read.c')
| -rw-r--r-- | gdb/dwarf2/read.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index 4622d14a05c..405b5fb3348 100644 --- a/gdb/dwarf2/read.c +++ b/gdb/dwarf2/read.c @@ -19983,7 +19983,7 @@ public: we're processing the end of a sequence. */ void record_line (bool end_sequence); - /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true + /* Check ADDRESS is -1, or zero and less than UNRELOCATED_LOWPC, and if true nop-out rest of the lines in this sequence. */ void check_line_address (struct dwarf2_cu *cu, const gdb_byte *line_ptr, @@ -20377,12 +20377,13 @@ lnp_state_machine::check_line_address (struct dwarf2_cu *cu, const gdb_byte *line_ptr, CORE_ADDR unrelocated_lowpc, CORE_ADDR address) { - /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside - the pc range of the CU. However, we restrict the test to only ADDRESS - values of zero to preserve GDB's previous behaviour which is to handle - the specific case of a function being GC'd by the linker. */ + /* Linkers resolve a symbolic relocation referencing a GC'd function to 0 or + -1. If ADDRESS is 0, ignoring the opcode will err if the text section is + located at 0x0. In this case, additionally check that if + ADDRESS < UNRELOCATED_LOWPC. */ - if (address == 0 && address < unrelocated_lowpc) + if ((address == 0 && address < unrelocated_lowpc) + || address == (CORE_ADDR) -1) { /* This line table is for a function which has been GCd by the linker. Ignore it. PR gdb/12528 */ |