LXR syslinux/gpxe/src/arch/i386/include/setjmp.h

   1#ifndef ETHERBOOT_SETJMP_H
   2#define ETHERBOOT_SETJMP_H
   3
   4FILE_LICENCE ( GPL2_OR_LATER );
   5
   6#include <stdint.h>
   7#include <realmode.h>
   8
   9/** A jump buffer */
  10typedef 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 */
  20typedef struct {
  21        jmp_buf env;
  22        uint16_t rm_ss;
  23        uint16_t rm_sp;
  24} rmjmp_buf[1];
  25
  26extern int __asmcall setjmp ( jmp_buf env );
  27extern 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