Code generated by executing itself (for example can have the JIT compiler?)
BONE of the Playbook, like Apple's iOS, prevents an application from self-production of his own code to execute?
For example, I can't launch V8 javascript engine of Google on Apple iOS because the operating system will not allow the application to have a page of memory that is executable and accessible writing. (in order to avoid the trojan style dodgy apps)
So, I just wanted to know if there are similar protections on the playbook, before wasting too much time!
Finally, I'd like to port V8 for the playbook - the possibility of including the code Javascript in a native app is very useful!
see you soon
Well, I solved my image-memory - the call of the function when you try to call strlen with inside of foo()...
The compiler generated instructions relative branch (short) for my call to strlen.
There are several ways to work around this problem:
1. use - 25mdelongueur-calls during the compilation, even though it may turn on long calls unnecessarily elsewhere, when all I really wanted was long calls inside my function foo().
2. use #pragma long_call / #pragma long_call_off or __attribute__ ((long_call)) on the functions that you want to generate a long advertisement. You must also __attribute__ ((weak)), if you declare the function in the same file as it is called for. for example:
__attribute__((long_call,weak)) int bar(const char *str) { return strlen(str); } int foo(char *str) { return bar(str); // this will generate a long-call to bar() which wraps strlen() for me. }
* Note that the call to strlen in bar() will not be a long call, but given that the wrapper bar() is not running of the bunch, it's okay.
3. load the address appeal explicit function within the function foo():
int foo(char *str) { size_t (*strlenptr)(const char*) = &strlen; return strlenptr(str); }
See you soon,.
Sean
Tags: BlackBerry Developers
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