ftrace-gen-ool-stubs.sh

 1#!/bin/sh
 2# SPDX-License-Identifier: GPL-2.0-or-later
 3
 4# Error out on error
 5set -e
 6
 7num_ool_stubs_text_builtin="$1"
 8is_64bit="$2"
 9objdump="$3"
10vmlinux_o="$4"
11arch_vmlinux_S="$5"
12
13RELOCATION=R_PPC64_ADDR64
14if [ -z "$is_64bit" ]; then
15	RELOCATION=R_PPC_ADDR32
16fi
17
18num_ool_stubs_total=$($objdump -r -j __patchable_function_entries -d "$vmlinux_o" |
19		      grep -c "$RELOCATION")
20num_ool_stubs_inittext=$($objdump -r -j __patchable_function_entries -d "$vmlinux_o" |
21			 grep -e ".init.text" -e ".text.startup" | grep -c "$RELOCATION")
22num_ool_stubs_text=$((num_ool_stubs_total - num_ool_stubs_inittext))
23
24if [ "$num_ool_stubs_text" -gt "$num_ool_stubs_text_builtin" ]; then
25	num_ool_stubs_text_end=$((num_ool_stubs_text - num_ool_stubs_text_builtin))
26else
27	num_ool_stubs_text_end=0
28fi
29
30cat > "$arch_vmlinux_S" <<EOF
31#include <asm/asm-offsets.h>
32#include <asm/ppc_asm.h>
33#include <linux/linkage.h>
34
35.pushsection .tramp.ftrace.text,"aw"
36SYM_DATA(ftrace_ool_stub_text_end_count, .long $num_ool_stubs_text_end)
37
38SYM_START(ftrace_ool_stub_text_end, SYM_L_GLOBAL, .balign SZL)
39#if $num_ool_stubs_text_end
40	.space $num_ool_stubs_text_end * FTRACE_OOL_STUB_SIZE
41#endif
42SYM_CODE_END(ftrace_ool_stub_text_end)
43.popsection
44
45.pushsection .tramp.ftrace.init,"aw"
46SYM_DATA(ftrace_ool_stub_inittext_count, .long $num_ool_stubs_inittext)
47
48SYM_START(ftrace_ool_stub_inittext, SYM_L_GLOBAL, .balign SZL)
49	.space $num_ool_stubs_inittext * FTRACE_OOL_STUB_SIZE
50SYM_CODE_END(ftrace_ool_stub_inittext)
51.popsection
52EOF