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Check for end of call-chain at end of step

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This commit is contained in:
Théophile Bastian 2019-06-09 12:58:49 +02:00
parent 6da6a389f9
commit 453253dd0e
1 changed files with 18 additions and 11 deletions
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29
src/eh_elf/eh_elf.c
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@ -97,17 +97,6 @@ int set_dwarf_loc_ifdef(
int eh_elf_step_cursor(struct cursor *cursor) {
uintptr_t ip = cursor->dwarf.ip;
// Check for the end of the call chain
if(DWARF_IS_NULL_LOC(cursor->dwarf.loc[UNW_TDEP_IP]))
return 0;
if(!DWARF_IS_NULL_LOC(cursor->dwarf.loc[UNW_TDEP_BP])) {
uintptr_t bp;
dwarf_get(&cursor->dwarf,
cursor->dwarf.loc[UNW_TDEP_BP], &bp);
if(bp == 0)
return 0;
}
// Retrieve memory map entry
@ -216,5 +205,23 @@ int eh_elf_step_cursor(struct cursor *cursor) {
cursor->dwarf.cfa = eh_elf_context.rsp;
cursor->dwarf.ip = eh_elf_context.rip;
// Check for the end of the call chain
if(DWARF_IS_NULL_LOC(cursor->dwarf.loc[UNW_TDEP_IP])) {
Debug(5, "End of call chain by null RA\n");
return 0;
}
/* FIXME ignore RBP part for now
if(!DWARF_IS_NULL_LOC(cursor->dwarf.loc[UNW_TDEP_BP])) {
uintptr_t bp;
dwarf_get(&cursor->dwarf,
cursor->dwarf.loc[UNW_TDEP_BP], &bp);
if(bp == 0) {
Debug(5, "End of call chain by null base pointer\n");
return 0;
}
}
// */
return 1;
}