diff options
Diffstat (limited to 'sysdeps/generic/unwind-dw2.c')
| -rw-r--r-- | sysdeps/generic/unwind-dw2.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/sysdeps/generic/unwind-dw2.c b/sysdeps/generic/unwind-dw2.c index 5ecf2846f3..d818e5dfd8 100644 --- a/sysdeps/generic/unwind-dw2.c +++ b/sysdeps/generic/unwind-dw2.c @@ -25,6 +25,7 @@ #include <error.h> #include <libintl.h> #include <dwarf2.h> +#include <stdio.h> #include <unwind.h> #include <unwind-pe.h> #include <unwind-dw2-fde.h> @@ -837,9 +838,16 @@ execute_cfa_program (const unsigned char *insn_ptr, case DW_CFA_restore_state: { struct frame_state_reg_info *old_rs = fs->regs.prev; - fs->regs = *old_rs; - old_rs->prev = unused_rs; - unused_rs = old_rs; +#ifdef _LIBC + if (old_rs == NULL) + __libc_fatal ("invalid DWARF unwind data"); + else +#endif + { + fs->regs = *old_rs; + old_rs->prev = unused_rs; + unused_rs = old_rs; + } } break; |