I'm attempting to run some code on the Keystone II ARM processor and am running into an issue with the RTS library. Since CCS 5.5 doesn't seem to support the Cortex-A15 yet I'm compiling for a Cortex-A8 since they are both ARMv7 and I assume are ISA compatible. A basic test program compiled and ran correctly but when I added Floating Point multiplication and debugged the processor hangs. Below is the disassembled code and where the issue occurs.
With rtsv7A8_A_le_eabi.lib:
... ... ... __aeabi_fmul: 800863a0: 3F56A7AD SWICC #5679021 800863a4: 3F30C562 SWICC #3196258 800863a8: 3DABE158 STCCC P1, C14, [R11, #352]! 800863ac: 3F14D92A SWICC #1366314 800863b0: 3E018103 CDPCC P1, #0, C8, C1, C3, #0 800863b4: 3F77CBF0 SWICC #7850992 800863b8: E1B03C23 MOVS R3, R3, LSR #24 800863bc: 13822102 ORRNE R2, R2, #-2147483648 800863c0: 03A00000 MOVEQ R0, #0 800863c4: 08BD807C LDMEQFD R13!, {R2, R3, R4, R5, R6, PC} 800863c8: E35300FF CMP R3, #255 ... ... ...After the first line (SWICC), the code jumps to address 0x00000048,
...
E59FF098 LDR PC, 0xE8
...
And ends up catching at some execution line and hanging.