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| /* 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 CONFIG_FUNCTION_GRAPH_TRACER
| .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 CONFIG_FUNCTION_GRAPH_TRACER
| _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 */
|
|
