Support Xtensa assembly
HBehrens opened this issue · comments
Collector.enhance_call_tree_from_assembly_line looks into specific ARM instructions to identify calls. This needs to be broadened to support Xtensa.
Also, it seems as if it's a common pattern for GCC to do relative calls where possible, https://gcc.gnu.org/onlinedocs/gcc/Xtensa-Options.html leading to two instructions and objdump doesn't desymbolize this (unlike ARM's relative jumps), so that it's necessary to analyze two instructions to derive a call:
jump (on instruction) followed by a call (two instructions)
40204418: 42cc bnez.n a2, 40204420 <umm_info+0x20>
4020441a: fff501 l32r a0, 402043f0 <__umoddi3+0x38c>
4020441d: 0000c0 callx0 a0
Also, see #7