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http://bugs.exim.org/show_bug.cgi?id=1243
Summary: enabling JIT on jailbroken iOS devices
Product: PCRE
Version: 8.30
Platform: Other
OS/Version: All
Status: NEW
Severity: bug
Priority: medium
Component: Code
AssignedTo: ph10@???
ReportedBy: ruediger.rill@???
CC: pcre-dev@???
JIT compilation is possible on jailbroken iOS devices, however Apple removed
__clear_cache from libgcc (on the devices) so it's not possible to use that
function.
By using ARM assembler it is possible to flush the instruction cache. So I
suggest the adding this:
#define SLJIT_CACHE_FLUSH(from, to) \
void jailbroken_clear_cache(char* from, char *to)
{
const int syscall = 0xf0002;
__asm __volatile (
"mov r0, %0\n"
"mov r1, %1\n"
"mov r7, %2\n"
"mov r2, #0x0\n"
"svc 0x00000000\n"
:
: "r" (from), "r" (to), "r" (syscall)
: "r0", "r1", "r7"
);
}
Best
Yllier
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