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