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Remove special handling for PC == 0. With this, kgdb can now properly
unwind across a page fault due to a null function pointer. It does a better job than ddb now in fact. Reviewed by: marcel MFC after: 3 days
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parent
35a64c9f6f
commit
c198287ff3
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=161555
@ -149,15 +149,12 @@ kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
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*lvalp = not_lval;
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*realnump = -1;
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cache = kgdb_trgt_frame_cache(next_frame, this_cache);
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if (cache->pc == 0)
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return;
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ofs = (regnum >= AMD64_RAX_REGNUM && regnum <= AMD64_EFLAGS_REGNUM + 2)
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? kgdb_trgt_frame_offset[regnum] : -1;
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if (ofs == -1)
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return;
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cache = kgdb_trgt_frame_cache(next_frame, this_cache);
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*addrp = cache->sp + ofs;
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*lvalp = lval_memory;
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target_read_memory(*addrp, valuep, regsz);
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@ -176,8 +173,6 @@ kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
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CORE_ADDR pc;
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pc = frame_pc_unwind(next_frame);
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if (pc == 0)
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return (&kgdb_trgt_trapframe_unwind);
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pname = NULL;
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find_pc_partial_function(pc, &pname, NULL, NULL);
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if (pname == NULL)
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