arch/arm64/include/asm/linkage.h

   1 #ifndef __ASM_LINKAGE_H
   2 #define __ASM_LINKAGE_H
   3
   4 #ifdef __ASSEMBLY__
   5 #include <asm/assembler.h>
   6 #endif
   7
   8 #define __ALIGN         .balign CONFIG_FUNCTION_ALIGNMENT
   9 #define __ALIGN_STR     ".balign " #CONFIG_FUNCTION_ALIGNMENT
  10
  11 /*
  12  * When using in-kernel BTI we need to ensure that PCS-conformant
  13  * assembly functions have suitable annotations.  Override
  14  * SYM_FUNC_START to insert a BTI landing pad at the start of
  15  * everything, the override is done unconditionally so we're more
  16  * likely to notice any drift from the overridden definitions.
  17  */
  18 #define SYM_FUNC_START(name)                            \
  19         SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)      \
  20         bti c ;
  21
  22 #define SYM_FUNC_START_NOALIGN(name)                    \
  23         SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)       \
  24         bti c ;
  25
  26 #define SYM_FUNC_START_LOCAL(name)                      \
  27         SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)       \
  28         bti c ;
  29
  30 #define SYM_FUNC_START_LOCAL_NOALIGN(name)              \
  31         SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)        \
  32         bti c ;
  33
  34 #define SYM_FUNC_START_WEAK(name)                       \
  35         SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN)        \
  36         bti c ;
  37
  38 #define SYM_FUNC_START_WEAK_NOALIGN(name)               \
  39         SYM_START(name, SYM_L_WEAK, SYM_A_NONE)         \
  40         bti c ;
  41
  42 #define SYM_TYPED_FUNC_START(name)                              \
  43         SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)        \
  44         bti c ;
  45
  46 #endif