diff options
Diffstat (limited to 'gdb/dwarf2-frame.c')
| -rw-r--r-- | gdb/dwarf2-frame.c | 81 |
1 files changed, 60 insertions, 21 deletions
diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c index edd6a9c..e78c328 100644 --- a/gdb/dwarf2-frame.c +++ b/gdb/dwarf2-frame.c @@ -40,6 +40,7 @@ #include "dwarf2-frame.h" #include "ax.h" #include "dwarf2loc.h" +#include "exceptions.h" struct comp_unit; @@ -986,6 +987,10 @@ struct dwarf2_frame_cache /* DWARF Call Frame Address. */ CORE_ADDR cfa; + /* Set if the return address column was marked as unavailable + (required non-collected memory or registers to compute). */ + int unavailable_retaddr; + /* Set if the return address column was marked as undefined. */ int undefined_retaddr; @@ -1013,6 +1018,7 @@ dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache) struct dwarf2_frame_cache *cache; struct dwarf2_frame_state *fs; struct dwarf2_fde *fde; + volatile struct gdb_exception ex; if (*this_cache) return *this_cache; @@ -1020,10 +1026,10 @@ dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache) /* Allocate a new cache. */ cache = FRAME_OBSTACK_ZALLOC (struct dwarf2_frame_cache); cache->reg = FRAME_OBSTACK_CALLOC (num_regs, struct dwarf2_frame_state_reg); + *this_cache = cache; /* Allocate and initialize the frame state. */ - fs = XMALLOC (struct dwarf2_frame_state); - memset (fs, 0, sizeof (struct dwarf2_frame_state)); + fs = XZALLOC (struct dwarf2_frame_state); old_chain = make_cleanup (dwarf2_frame_state_free, fs); /* Unwind the PC. @@ -1068,26 +1074,39 @@ dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache) execute_cfa_program (fde, fde->instructions, fde->end, gdbarch, get_frame_pc (this_frame), fs); - /* Calculate the CFA. */ - switch (fs->regs.cfa_how) + TRY_CATCH (ex, RETURN_MASK_ERROR) { - case CFA_REG_OFFSET: - cache->cfa = read_reg (this_frame, fs->regs.cfa_reg); - if (fs->armcc_cfa_offsets_reversed) - cache->cfa -= fs->regs.cfa_offset; - else - cache->cfa += fs->regs.cfa_offset; - break; - - case CFA_EXP: - cache->cfa = - execute_stack_op (fs->regs.cfa_exp, fs->regs.cfa_exp_len, - cache->addr_size, cache->text_offset, - this_frame, 0, 0); - break; + /* Calculate the CFA. */ + switch (fs->regs.cfa_how) + { + case CFA_REG_OFFSET: + cache->cfa = read_reg (this_frame, fs->regs.cfa_reg); + if (fs->armcc_cfa_offsets_reversed) + cache->cfa -= fs->regs.cfa_offset; + else + cache->cfa += fs->regs.cfa_offset; + break; + + case CFA_EXP: + cache->cfa = + execute_stack_op (fs->regs.cfa_exp, fs->regs.cfa_exp_len, + cache->addr_size, cache->text_offset, + this_frame, 0, 0); + break; + + default: + internal_error (__FILE__, __LINE__, _("Unknown CFA rule.")); + } + } + if (ex.reason < 0) + { + if (ex.error == NOT_AVAILABLE_ERROR) + { + cache->unavailable_retaddr = 1; + return cache; + } - default: - internal_error (__FILE__, __LINE__, _("Unknown CFA rule.")); + throw_exception (ex); } /* Initialize the register state. */ @@ -1193,10 +1212,25 @@ incomplete CFI data; unspecified registers (e.g., %s) at %s"), do_cleanups (old_chain); - *this_cache = cache; return cache; } +static enum unwind_stop_reason +dwarf2_frame_unwind_stop_reason (struct frame_info *this_frame, + void **this_cache) +{ + struct dwarf2_frame_cache *cache + = dwarf2_frame_cache (this_frame, this_cache); + + if (cache->unavailable_retaddr) + return UNWIND_UNAVAILABLE; + + if (cache->undefined_retaddr) + return UNWIND_OUTERMOST; + + return UNWIND_NO_REASON; +} + static void dwarf2_frame_this_id (struct frame_info *this_frame, void **this_cache, struct frame_id *this_id) @@ -1204,6 +1238,9 @@ dwarf2_frame_this_id (struct frame_info *this_frame, void **this_cache, struct dwarf2_frame_cache *cache = dwarf2_frame_cache (this_frame, this_cache); + if (cache->unavailable_retaddr) + return; + if (cache->undefined_retaddr) return; @@ -1321,6 +1358,7 @@ dwarf2_frame_sniffer (const struct frame_unwind *self, static const struct frame_unwind dwarf2_frame_unwind = { NORMAL_FRAME, + dwarf2_frame_unwind_stop_reason, dwarf2_frame_this_id, dwarf2_frame_prev_register, NULL, @@ -1330,6 +1368,7 @@ static const struct frame_unwind dwarf2_frame_unwind = static const struct frame_unwind dwarf2_signal_frame_unwind = { SIGTRAMP_FRAME, + dwarf2_frame_unwind_stop_reason, dwarf2_frame_this_id, dwarf2_frame_prev_register, NULL, |