/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Split from ftrace_64.S */ #include <linux/magic.h> #include <asm/ppc_asm.h> #include <asm/asm-offsets.h> #include <asm/ftrace.h> #include <asm/ppc-opcode.h> #include <asm/export.h> _GLOBAL_TOC(ftrace_caller) lbz r3, PACA_FTRACE_ENABLED(r13) cmpdi r3, 0 beqlr /* Taken from output of objdump from lib64/glibc */ mflr r3 ld r11, 0(r1) stdu r1, -112(r1) std r3, 128(r1) ld r4, 16(r11) subi r3, r3, MCOUNT_INSN_SIZE .globl ftrace_call ftrace_call: bl ftrace_stub nop #ifdef [31mCONFIG_FUNCTION_GRAPH_TRACER[0m .globl ftrace_graph_call ftrace_graph_call: b ftrace_graph_stub _GLOBAL(ftrace_graph_stub) #endif ld r0, 128(r1) mtlr r0 addi r1, r1, 112 _GLOBAL(ftrace_stub) blr #ifdef [31mCONFIG_FUNCTION_GRAPH_TRACER[0m _GLOBAL(ftrace_graph_caller) addi r5, r1, 112 /* load r4 with local address */ ld r4, 128(r1) subi r4, r4, MCOUNT_INSN_SIZE /* Grab the LR out of the caller stack frame */ ld r11, 112(r1) ld r3, 16(r11) bl prepare_ftrace_return nop /* * prepare_ftrace_return gives us the address we divert to. * Change the LR in the callers stack frame to this. */ ld r11, 112(r1) std r3, 16(r11) ld r0, 128(r1) mtlr r0 addi r1, r1, 112 blr #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |