powerpc/mm/book3s64/radix: Remove unused code.

[linux-2.6-block.git] / scripts / link-vmlinux.sh

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 915775eb2921b56c01d6c06cc6cb9daa786376a7..06495379fcd8843d4f49b3237d5f138f4a4a5134 100755 (executable)
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -56,13 +56,19 @@ modpost_link()
 }
 
 # Link of vmlinux
-# ${1} - optional extra .o files
-# ${2} - output file
+# ${1} - output file
+# ${2}, ${3}, ... - optional extra .o files
 vmlinux_link()
 {
        local lds="${objtree}/${KBUILD_LDS}"
+       local output=${1}
        local objects
 
+       info LD ${output}
+
+       # skip output file argument
+       shift
+
        if [ "${SRCARCH}" != "um" ]; then
                objects="--whole-archive                        \
                        ${KBUILD_VMLINUX_OBJS}                  \
@@ -70,9 +76,10 @@ vmlinux_link()
                        --start-group                           \
                        ${KBUILD_VMLINUX_LIBS}                  \
                        --end-group                             \
-                       ${1}"
+                       ${@}"
 
-               ${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux} -o ${2}      \
+               ${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}      \
+                       -o ${output}                            \
                        -T ${lds} ${objects}
        else
                objects="-Wl,--whole-archive                    \
@@ -81,9 +88,10 @@ vmlinux_link()
                        -Wl,--start-group                       \
                        ${KBUILD_VMLINUX_LIBS}                  \
                        -Wl,--end-group                         \
-                       ${1}"
+                       ${@}"
 
-               ${CC} ${CFLAGS_vmlinux} -o ${2}                 \
+               ${CC} ${CFLAGS_vmlinux}                         \
+                       -o ${output}                            \
                        -Wl,-T,${lds}                           \
                        ${objects}                              \
                        -lutil -lrt -lpthread
@@ -92,23 +100,36 @@ vmlinux_link()
 }
 
 # generate .BTF typeinfo from DWARF debuginfo
+# ${1} - vmlinux image
+# ${2} - file to dump raw BTF data into
 gen_btf()
 {
-       local pahole_ver;
+       local pahole_ver
+       local bin_arch
 
        if ! [ -x "$(command -v ${PAHOLE})" ]; then
                info "BTF" "${1}: pahole (${PAHOLE}) is not available"
-               return 0
+               return 1
        fi
 
        pahole_ver=$(${PAHOLE} --version | sed -E 's/v([0-9]+)\.([0-9]+)/\1\2/')
        if [ "${pahole_ver}" -lt "113" ]; then
                info "BTF" "${1}: pahole version $(${PAHOLE} --version) is too old, need at least v1.13"
-               return 0
+               return 1
        fi
 
-       info "BTF" ${1}
+       info "BTF" ${2}
+       vmlinux_link ${1}
        LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
+
+       # dump .BTF section into raw binary file to link with final vmlinux
+       bin_arch=$(LANG=C ${OBJDUMP} -f ${1} | grep architecture | \
+               cut -d, -f1 | cut -d' ' -f2)
+       bin_format=$(LANG=C ${OBJDUMP} -f ${1} | grep 'file format' | \
+               awk '{print $4}')
+       ${OBJCOPY} --dump-section .BTF=.btf.vmlinux.bin ${1} 2>/dev/null
+       ${OBJCOPY} -I binary -O ${bin_format} -B ${bin_arch} \
+               --rename-section .data=.BTF .btf.vmlinux.bin ${2}
 }
 
 # Create ${2} .o file with all symbols from the ${1} object file
@@ -138,6 +159,18 @@ kallsyms()
        ${CC} ${aflags} -c -o ${2} ${afile}
 }
 
+# Perform one step in kallsyms generation, including temporary linking of
+# vmlinux.
+kallsyms_step()
+{
+       kallsymso_prev=${kallsymso}
+       kallsymso=.tmp_kallsyms${1}.o
+       kallsyms_vmlinux=.tmp_vmlinux${1}
+
+       vmlinux_link ${kallsyms_vmlinux} "${kallsymso_prev}" ${btf_vmlinux_bin_o}
+       kallsyms ${kallsyms_vmlinux} ${kallsymso}
+}
+
 # Create map file with all symbols from ${1}
 # See mksymap for additional details
 mksysmap()
@@ -153,6 +186,7 @@ sortextable()
 # Delete output files in case of error
 cleanup()
 {
+       rm -f .btf.*
        rm -f .tmp_System.map
        rm -f .tmp_kallsyms*
        rm -f .tmp_vmlinux*
@@ -215,7 +249,15 @@ ${MAKE} -f "${srctree}/scripts/Makefile.modpost" MODPOST_VMLINUX=1
 info MODINFO modules.builtin.modinfo
 ${OBJCOPY} -j .modinfo -O binary vmlinux.o modules.builtin.modinfo
 
+btf_vmlinux_bin_o=""
+if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
+       if gen_btf .tmp_vmlinux.btf .btf.vmlinux.bin.o ; then
+               btf_vmlinux_bin_o=.btf.vmlinux.bin.o
+       fi
+fi
+
 kallsymso=""
+kallsymso_prev=""
 kallsyms_vmlinux=""
 if [ -n "${CONFIG_KALLSYMS}" ]; then
 
@@ -242,37 +284,19 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
        # a)  Verify that the System.map from vmlinux matches the map from
        #     ${kallsymso}.
 
-       kallsymso=.tmp_kallsyms2.o
-       kallsyms_vmlinux=.tmp_vmlinux2
-
-       # step 1
-       vmlinux_link "" .tmp_vmlinux1
-       kallsyms .tmp_vmlinux1 .tmp_kallsyms1.o
-
-       # step 2
-       vmlinux_link .tmp_kallsyms1.o .tmp_vmlinux2
-       kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
+       kallsyms_step 1
+       kallsyms_step 2
 
        # step 3
-       size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" .tmp_kallsyms1.o)
-       size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" .tmp_kallsyms2.o)
+       size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso_prev})
+       size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso})
 
        if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
-               kallsymso=.tmp_kallsyms3.o
-               kallsyms_vmlinux=.tmp_vmlinux3
-
-               vmlinux_link .tmp_kallsyms2.o .tmp_vmlinux3
-
-               kallsyms .tmp_vmlinux3 .tmp_kallsyms3.o
+               kallsyms_step 3
        fi
 fi
 
-info LD vmlinux
-vmlinux_link "${kallsymso}" vmlinux
-
-if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
-       gen_btf vmlinux
-fi
+vmlinux_link vmlinux "${kallsymso}" ${btf_vmlinux_bin_o}
 
 if [ -n "${CONFIG_BUILDTIME_EXTABLE_SORT}" ]; then
        info SORTEX vmlinux