I am compiling this piece of code from an open source project that I wish not
to have to change. The problem is that when compiled for ARM, it generates an
LDRD instruction, which when executed, causes a bus error since the address in
ptr is not doubleword aligned. I know I can change the code but I prefer to
leave it intact as there may be many more instances of this and I don't wish to
maintain the code. I found the compiler option -mfix-cortex-m3-ldrd but the
code still being generated with the LDRD instruction. Any suggestions on how
to tell the compiler to avoid LDRD instructions?
248 static DWORD64 dwarf2_get_u8(const unsigned char* ptr)
249 {
250 return *(const UINT64*)ptr;
251 }
(gdb) x/5i $pc
=> 0x4325ffd4 <dwarf2_get_u8+20>: ldrd r2, [r3]
gdb) p ptr
$6 = (const unsigned char *) 0x435a2fa5 ""
(gdb) p $r3
$7 = 0x435a2fa5
Happy Holidays,
Roger R. Cruz
