1 #ifndef ETHERBOOT_SETJMP_H 2 #define ETHERBOOT_SETJMP_H 3 4 FILE_LICENCE ( GPL2_OR_LATER ); 5 6 #include <stdint.h> 7 #include <realmode.h> 8 9 /** A jump buffer */ 10 typedef struct { 11 uint32_t retaddr; 12 uint32_t ebx; 13 uint32_t esp; 14 uint32_t ebp; 15 uint32_t esi; 16 uint32_t edi; 17 } jmp_buf[1]; 18 19 /** A real-mode-extended jump buffer */ 20 typedef struct { 21 jmp_buf env; 22 uint16_t rm_ss; 23 uint16_t rm_sp; 24 } rmjmp_buf[1]; 25 26 extern int __asmcall setjmp ( jmp_buf env ); 27 extern void __asmcall longjmp ( jmp_buf env, int val ); 28 29 #define rmsetjmp( _env ) ( { \ 30 (_env)->rm_ss = rm_ss; \ 31 (_env)->rm_sp = rm_sp; \ 32 setjmp ( (_env)->env ); } ) \ 33 34 #define rmlongjmp( _env, _val ) do { \ 35 rm_ss = (_env)->rm_ss; \ 36 rm_sp = (_env)->rm_sp; \ 37 longjmp ( (_env)->env, (_val) ); \ 38 } while ( 0 ) 39 40 #endif /* ETHERBOOT_SETJMP_H */ 41
