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New debug feature: Use the SH1 user break controller to catch illegal memory accesses

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5026 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2004-08-30 19:52:45 +00:00
parent 56fd6f9316
commit 06cb237af6
7 changed files with 104 additions and 6 deletions
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11
firmware/export/system.h
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@ -164,6 +164,17 @@ static inline int cas2 (volatile int *pointer1,volatile int *pointer2,int reques
set_irq_level(oldlevel);
return 0;
}
/* Utilize the user break controller to catch invalid memory accesses. */
int system_memory_guard(int newmode);
enum {
MEMGUARD_KEEP = -1, /* don't change the mode; for reading */
MEMGUARD_NONE = 0, /* catch nothing */
MEMGUARD_FLASH_WRITES, /* catch writes to area 02 (flash ROM) */
MEMGUARD_ZERO_AREA, /* catch all accesses to areas 00 and 01 */
MAXMEMGUARD
};
#endif