arch/x86/special.c

42  * There are 3 basic jump table patterns:
47  *    jump table which is stored in .rodata.
54  *    As part of an optimization, GCC makes a copy of an existing switch jump
55  *    table, modifies it, and then hard-codes the jump (albeit with an indirect
56  *    jump) to use a single entry in the table.  The rest of the jump table and
57  *    some of its jump targets remain as dead code.
77  *    ensure the same register is used in the mov and jump instructions.
104 	 * symbol.  GCC jump tables are anonymous data.  in arch_find_switch_table()
106 	 * Also support C jump tables which are in the same format as  in arch_find_switch_table()
107 	 * switch jump tables.  For objtool to recognize them, they  in arch_find_switch_table()
130 		WARN_INSN(insn, "ignoring unreachables due to jump table quirk");  in arch_find_switch_table()