mirror of https://github.com/ipxe/ipxe.git
41 lines
804 B
C
41 lines
804 B
C
#ifndef ETHERBOOT_SETJMP_H
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#define ETHERBOOT_SETJMP_H
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <realmode.h>
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/** A jump buffer */
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typedef struct {
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uint32_t retaddr;
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uint32_t ebx;
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uint32_t esp;
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uint32_t ebp;
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uint32_t esi;
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uint32_t edi;
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} jmp_buf[1];
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/** A real-mode-extended jump buffer */
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typedef struct {
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jmp_buf env;
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uint16_t rm_ss;
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uint16_t rm_sp;
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} rmjmp_buf[1];
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extern int __asmcall setjmp ( jmp_buf env );
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extern void __asmcall longjmp ( jmp_buf env, int val );
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#define rmsetjmp( _env ) ( { \
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(_env)->rm_ss = rm_ss; \
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(_env)->rm_sp = rm_sp; \
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setjmp ( (_env)->env ); } ) \
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#define rmlongjmp( _env, _val ) do { \
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rm_ss = (_env)->rm_ss; \
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rm_sp = (_env)->rm_sp; \
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longjmp ( (_env)->env, (_val) ); \
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} while ( 0 )
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#endif /* ETHERBOOT_SETJMP_H */
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