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Update unicorn.h (#821)

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Further clarifying the comments I PRed last week.
This commit is contained in:
bulaza 2017-05-06 10:32:00 -04:00 committed by Nguyen Anh Quynh
parent 5385baba39
commit e95edd37f3
1 changed files with 5 additions and 2 deletions
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include/unicorn/unicorn.h
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@ -275,12 +275,15 @@ typedef void (*uc_cb_hookmem_t)(uc_engine *uc, uc_mem_type type,
@return: return true to continue, or false to stop program (due to invalid memory). @return: return true to continue, or false to stop program (due to invalid memory).
NOTE: returning true to continue execution will only work if if the accessed NOTE: returning true to continue execution will only work if if the accessed
memory is made accessible with the correct permissions during the hook. memory is made accessible with the correct permissions during the hook.
In the event of a UC_MEM_READ_UNMAPPED or UC_MEM_WRITE_UNMAPPED callback, In the event of a UC_MEM_READ_UNMAPPED or UC_MEM_WRITE_UNMAPPED callback,
the memory should be uc_mem_map()-ed with the correct permissions, and the the memory should be uc_mem_map()-ed with the correct permissions, and the
instruction will then read or write to the address as it was supposed to. instruction will then read or write to the address as it was supposed to.
In the event of a UC_MEM_FETCH_UNMAPPED callback, the memory can be mapped In the event of a UC_MEM_FETCH_UNMAPPED callback, the memory can be mapped
in as executable, in which case execution will resume from the fetched address, in as executable, in which case execution will resume from the fetched address.
or the instruction pointer can be written to in order to resume execution elsewhere. The instruction pointer may be written to in order to change where execution resumes,
but the fetch must succeed if execution is to resume.
*/ */
typedef bool (*uc_cb_eventmem_t)(uc_engine *uc, uc_mem_type type, typedef bool (*uc_cb_eventmem_t)(uc_engine *uc, uc_mem_type type,
uint64_t address, int size, int64_t value, void *user_data); uint64_t address, int size, int64_t value, void *user_data);