diff options
Diffstat (limited to 'newlib/libc/include/machine/setjmp.h')
| -rw-r--r-- | newlib/libc/include/machine/setjmp.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/newlib/libc/include/machine/setjmp.h b/newlib/libc/include/machine/setjmp.h index 97749c0cb..1c68ce45c 100644 --- a/newlib/libc/include/machine/setjmp.h +++ b/newlib/libc/include/machine/setjmp.h @@ -287,6 +287,24 @@ _BEGIN_STD_C #define _JBTYPE unsigned char #endif +/* + * There are two versions of setjmp()/longjmp(): + * 1) Compiler (gcc) built-in versions. + * 2) Function-call versions. + * + * The built-in versions are used most of the time. When used, gcc replaces + * calls to setjmp()/longjmp() with inline assembly code. The built-in + * versions save/restore a variable number of registers. + + * _JBLEN is set to 40 to be ultra-safe with the built-in versions. + * It only needs to be 12 for the function-call versions + * but this data structure is used by both versions. + */ +#ifdef __NIOS2__ +#define _JBLEN 40 +#define _JBTYPE unsigned long +#endif + #ifdef __RX__ #define _JBLEN 0x44 #endif |