projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 5c02cd2f ME |
1 | #!/bin/sh |
| 2 | # | |
| 3 | # Copyright © 2008 IBM Corporation | |
| 4 | # | |
| 5 | # This program is free software; you can redistribute it and/or | |
| 6 | # modify it under the terms of the GNU General Public License | |
| 7 | # as published by the Free Software Foundation; either version | |
| 8 | # 2 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | # This script checks prom_init.o to see what external symbols it | |
| 11 | # is using, if it finds symbols not in the whitelist it returns | |
| 12 | # an error. The point of this is to discourage people from | |
| 13 | # intentionally or accidentally adding new code to prom_init.c | |
| 14 | # which has side effects on other parts of the kernel. | |
| 15 | ||
| 16 | # If you really need to reference something from prom_init.o add | |
| 17 | # it to the list below: | |
| 18 | ||
| 19 | WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush | |
| 20 | _end enter_prom memcpy memset reloc_offset __secondary_hold | |
| 21 | __secondary_hold_acknowledge __secondary_hold_spinloop __start | |
| 22 | strcmp strcpy strlcpy strlen strncmp strstr logo_linux_clut224 | |
| e7943fbb | 23 | reloc_got2 kernstart_addr memstart_addr linux_banner" |
| 5c02cd2f ME |
24 | |
| 25 | NM="$1" | |
| 26 | OBJ="$2" | |
| 27 | ||
| 28 | ERROR=0 | |
| 29 | ||
| 30 | for UNDEF in $($NM -u $OBJ | awk '{print $2}') | |
| 31 | do | |
| 32 | # On 64-bit nm gives us the function descriptors, which have | |
| 33 | # a leading . on the name, so strip it off here. | |
| 34 | UNDEF="${UNDEF#.}" | |
| 35 | ||
| 36 | if [ $KBUILD_VERBOSE ]; then | |
| 37 | if [ $KBUILD_VERBOSE -ne 0 ]; then | |
| 38 | echo "Checking prom_init.o symbol '$UNDEF'" | |
| 39 | fi | |
| 40 | fi | |
| 41 | ||
| 42 | OK=0 | |
| 43 | for WHITE in $WHITELIST | |
| 44 | do | |
| 45 | if [ "$UNDEF" = "$WHITE" ]; then | |
| 46 | OK=1 | |
| 47 | break | |
| 48 | fi | |
| 49 | done | |
| 50 | ||
| da3de6df KG |
51 | # ignore register save/restore funcitons |
| 52 | if [ "${UNDEF:0:9}" = "_restgpr_" ]; then | |
| 53 | OK=1 | |
| 54 | fi | |
| 5afd878a SR |
55 | if [ "${UNDEF:0:10}" = "_restgpr0_" ]; then |
| 56 | OK=1 | |
| 57 | fi | |
| da3de6df KG |
58 | if [ "${UNDEF:0:11}" = "_rest32gpr_" ]; then |
| 59 | OK=1 | |
| 60 | fi | |
| 61 | if [ "${UNDEF:0:9}" = "_savegpr_" ]; then | |
| 62 | OK=1 | |
| 63 | fi | |
| 5afd878a SR |
64 | if [ "${UNDEF:0:10}" = "_savegpr0_" ]; then |
| 65 | OK=1 | |
| 66 | fi | |
| da3de6df KG |
67 | if [ "${UNDEF:0:11}" = "_save32gpr_" ]; then |
| 68 | OK=1 | |
| 69 | fi | |
| 70 | ||
| 5c02cd2f ME |
71 | if [ $OK -eq 0 ]; then |
| 72 | ERROR=1 | |
| 73 | echo "Error: External symbol '$UNDEF' referenced" \ | |
| 74 | "from prom_init.c" >&2 | |
| 75 | fi | |
| 76 | done | |
| 77 | ||
| 78 | exit $ERROR |