iPXE
biosint.h
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1 #ifndef BIOSINT_H
2 #define BIOSINT_H
3 
4 /**
5  * @file BIOS interrupts
6  *
7  */
8 
9 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
10 
11 #include <realmode.h>
12 
13 struct segoff;
14 
15 /**
16  * Hooked interrupt count
17  *
18  * At exit, after unhooking all possible interrupts, this counter
19  * should be examined. If it is non-zero, it means that we failed to
20  * unhook at least one interrupt vector, and so must not free up the
21  * memory we are using. (Note that this also implies that we should
22  * re-hook INT 15 in order to hide ourselves from the memory map).
23  */
25 #define hooked_bios_interrupts __use_text16 ( hooked_bios_interrupts )
26 
27 extern void hook_bios_interrupt ( unsigned int interrupt, unsigned int handler,
28  struct segoff *chain_vector );
29 extern int unhook_bios_interrupt ( unsigned int interrupt,
30  unsigned int handler,
31  struct segoff *chain_vector );
32 extern void check_bios_interrupts ( void );
33 
34 #endif /* BIOSINT_H */
uint16_t __text16(hooked_bios_interrupts)
Hooked interrupt count.
FILE_LICENCE(GPL2_OR_LATER_OR_UBDL)
unsigned short uint16_t
Definition: stdint.h:11
int unhook_bios_interrupt(unsigned int interrupt, unsigned int handler, struct segoff *chain_vector)
Unhook INT vector.
Definition: biosint.c:69
#define hooked_bios_interrupts
Definition: biosint.h:25
void check_bios_interrupts(void)
Dump changes to interrupt vector table (for debugging)
Definition: biosint.c:98
void hook_bios_interrupt(unsigned int interrupt, unsigned int handler, struct segoff *chain_vector)
Hook INT vector.
Definition: biosint.c:24
void interrupt(int intr, struct interrupt_frame32 *frame32, struct interrupt_frame64 *frame64)
Interrupt handler.
Definition: librm_mgmt.c:246