btf: rename /sys/kernel/btf/kernel into /sys/kernel/btf/vmlinux
Expose kernel's BTF under the name vmlinux to be more uniform with using
kernel module names as file names in the future.
Fixes: 341dfcf8d7 ("btf: expose BTF info through sysfs")
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
alistair/sunxi64-5.4-dsi
Andrii Nakryiko
Daniel Borkmann
parent
9840a4ffcf
commit
7fd785685e
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@ -6,7 +6,7 @@ Description:
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Contains BTF type information and related data for kernel and
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kernel modules.
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What: /sys/kernel/btf/kernel
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What: /sys/kernel/btf/vmlinux
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Date: Aug 2019
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KernelVersion: 5.5
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Contact: bpf@vger.kernel.org
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@ -9,30 +9,30 @@
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#include <linux/sysfs.h>
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/* See scripts/link-vmlinux.sh, gen_btf() func for details */
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extern char __weak _binary__btf_kernel_bin_start[];
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extern char __weak _binary__btf_kernel_bin_end[];
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extern char __weak _binary__btf_vmlinux_bin_start[];
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extern char __weak _binary__btf_vmlinux_bin_end[];
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static ssize_t
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btf_kernel_read(struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t len)
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btf_vmlinux_read(struct file *file, struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t len)
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{
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memcpy(buf, _binary__btf_kernel_bin_start + off, len);
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memcpy(buf, _binary__btf_vmlinux_bin_start + off, len);
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return len;
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}
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static struct bin_attribute bin_attr_btf_kernel __ro_after_init = {
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.attr = { .name = "kernel", .mode = 0444, },
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.read = btf_kernel_read,
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static struct bin_attribute bin_attr_btf_vmlinux __ro_after_init = {
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.attr = { .name = "vmlinux", .mode = 0444, },
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.read = btf_vmlinux_read,
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};
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static struct kobject *btf_kobj;
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static int __init btf_kernel_init(void)
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static int __init btf_vmlinux_init(void)
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{
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int err;
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if (!_binary__btf_kernel_bin_start)
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if (!_binary__btf_vmlinux_bin_start)
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return 0;
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btf_kobj = kobject_create_and_add("btf", kernel_kobj);
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@ -42,10 +42,10 @@ static int __init btf_kernel_init(void)
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return err;
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}
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bin_attr_btf_kernel.size = _binary__btf_kernel_bin_end -
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_binary__btf_kernel_bin_start;
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bin_attr_btf_vmlinux.size = _binary__btf_vmlinux_bin_end -
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_binary__btf_vmlinux_bin_start;
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return sysfs_create_bin_file(btf_kobj, &bin_attr_btf_kernel);
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return sysfs_create_bin_file(btf_kobj, &bin_attr_btf_vmlinux);
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}
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subsys_initcall(btf_kernel_init);
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subsys_initcall(btf_vmlinux_init);
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@ -117,9 +117,9 @@ gen_btf()
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# dump .BTF section into raw binary file to link with final vmlinux
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bin_arch=$(${OBJDUMP} -f ${1} | grep architecture | \
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cut -d, -f1 | cut -d' ' -f2)
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${OBJCOPY} --dump-section .BTF=.btf.kernel.bin ${1} 2>/dev/null
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${OBJCOPY} --dump-section .BTF=.btf.vmlinux.bin ${1} 2>/dev/null
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${OBJCOPY} -I binary -O ${CONFIG_OUTPUT_FORMAT} -B ${bin_arch} \
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--rename-section .data=.BTF .btf.kernel.bin ${2}
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--rename-section .data=.BTF .btf.vmlinux.bin ${2}
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}
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# Create ${2} .o file with all symbols from the ${1} object file
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@ -227,10 +227,10 @@ ${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
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info MODINFO modules.builtin.modinfo
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${OBJCOPY} -j .modinfo -O binary vmlinux.o modules.builtin.modinfo
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btf_kernel_bin_o=""
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btf_vmlinux_bin_o=""
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if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
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if gen_btf .tmp_vmlinux.btf .btf.kernel.bin.o ; then
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btf_kernel_bin_o=.btf.kernel.bin.o
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if gen_btf .tmp_vmlinux.btf .btf.vmlinux.bin.o ; then
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btf_vmlinux_bin_o=.btf.vmlinux.bin.o
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fi
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fi
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@ -265,11 +265,11 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
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kallsyms_vmlinux=.tmp_vmlinux2
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# step 1
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vmlinux_link .tmp_vmlinux1 ${btf_kernel_bin_o}
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vmlinux_link .tmp_vmlinux1 ${btf_vmlinux_bin_o}
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kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o
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# step 2
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vmlinux_link .tmp_vmlinux2 .tmp_kallsyms1.o ${btf_kernel_bin_o}
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vmlinux_link .tmp_vmlinux2 .tmp_kallsyms1.o ${btf_vmlinux_bin_o}
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kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
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# step 3
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@ -280,13 +280,13 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
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kallsymso=.tmp_kallsyms3.o
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kallsyms_vmlinux=.tmp_vmlinux3
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vmlinux_link .tmp_vmlinux3 .tmp_kallsyms2.o ${btf_kernel_bin_o}
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vmlinux_link .tmp_vmlinux3 .tmp_kallsyms2.o ${btf_vmlinux_bin_o}
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kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o
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fi
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fi
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info LD vmlinux
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vmlinux_link vmlinux "${kallsymso}" "${btf_kernel_bin_o}"
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vmlinux_link vmlinux "${kallsymso}" "${btf_vmlinux_bin_o}"
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if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
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info SORTEX vmlinux
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