projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| bf41f30d NC |
1 | dnl |
| 2 | dnl GCC_CET_FLAGS | |
| 3 | dnl (SHELL-CODE_HANDLER) | |
| 4 | dnl | |
| 5 | AC_DEFUN([GCC_CET_FLAGS],[dnl | |
| 37f980dc SM |
6 | GCC_ENABLE(cet, no, ,[enable Intel CET in target libraries], |
| 7 | permit yes|no|auto) | |
| 552d4da4 L |
8 | AC_MSG_CHECKING([for CET support]) |
| 9 | ||
| bf41f30d NC |
10 | case "$host" in |
| 11 | i[[34567]]86-*-linux* | x86_64-*-linux*) | |
| 12 | case "$enable_cet" in | |
| 37f980dc | 13 | auto) |
| 552d4da4 L |
14 | # Check if target supports multi-byte NOPs |
| 15 | # and if assembler supports CET insn. | |
| bf41f30d NC |
16 | AC_COMPILE_IFELSE( |
| 17 | [AC_LANG_PROGRAM( | |
| 18 | [], | |
| 552d4da4 L |
19 | [ |
| 20 | #if !defined(__SSE2__) | |
| 21 | #error target does not support multi-byte NOPs | |
| 22 | #else | |
| 23 | asm ("setssbsy"); | |
| 24 | #endif | |
| 25 | ])], | |
| bf41f30d NC |
26 | [enable_cet=yes], |
| 27 | [enable_cet=no]) | |
| 28 | ;; | |
| 29 | yes) | |
| 30 | # Check if assembler supports CET. | |
| 31 | AC_COMPILE_IFELSE( | |
| 32 | [AC_LANG_PROGRAM( | |
| 33 | [], | |
| 34 | [asm ("setssbsy");])], | |
| 35 | [], | |
| 36 | [AC_MSG_ERROR([assembler with CET support is required for --enable-cet])]) | |
| 37 | ;; | |
| 38 | esac | |
| 39 | ;; | |
| 40 | *) | |
| 41 | enable_cet=no | |
| 42 | ;; | |
| 43 | esac | |
| 44 | if test x$enable_cet = xyes; then | |
| 37f980dc | 45 | $1="-fcf-protection -mshstk" |
| 552d4da4 L |
46 | AC_MSG_RESULT([yes]) |
| 47 | else | |
| 48 | AC_MSG_RESULT([no]) | |
| bf41f30d NC |
49 | fi |
| 50 | ]) |