diff options
| -rw-r--r-- | libgloss/arc/crt0.S | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/libgloss/arc/crt0.S b/libgloss/arc/crt0.S index e4a15eb48..b93b63e4c 100644 --- a/libgloss/arc/crt0.S +++ b/libgloss/arc/crt0.S @@ -1,5 +1,5 @@ /* - Copyright (c) 2015, Synopsys, Inc. All rights reserved. + Copyright (c) 2015-2016, Synopsys, Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: @@ -41,10 +41,24 @@ the initialization code. */ +/* Compatibility with older ARC GCC, that doesn't provide some of the + preprocessor defines used by newlib and libgloss for ARC. */ +#if defined (__Xbarrel_shifter) && !defined (__ARC_BARREL_SHIFTER__) +#define __ARC_BARREL_SHIFTER__ 1 +#endif + +#if defined (__EM__) && !defined (__ARCEM__) +#define __ARCEM__ 1 +#endif + +#if defined (__HS__) && !defined (__ARCHS__) +#define __ARCHS__ 1 +#endif + .file "crt0.S" .extern main -#if defined (__EM__) || defined (__HS__) +#if defined (__ARCEM__) || defined (__ARCHS__) .section .ivt, "a", @progbits ; handler's name, type, number,name, offset in IVT (hex/dec) @@ -74,7 +88,7 @@ .section .text.__startup, "ax", @progbits #else .text -#endif +#endif /* __ARCEM__ || __ARCHS__ */ .global __start .type __start, @function @@ -111,7 +125,7 @@ __start: ; instruction ; - loop body should have at least two instruction words __start: -#if defined (__HS__) +#if defined (__ARCHS__) ; Allow unaligned accesses. lr r2, [0xA] bset r2, r2, 19 @@ -163,21 +177,21 @@ __start: jl @_init #else bl @_init -#endif +#endif /* __ARCEM__ || __ARCHS__ */ mov_s r0, r13 mov_s r1, r14 ; branch to main -#if defined (__EM__) || defined (__HS__) +#if defined (__ARCEM__) || defined (__ARCHS__) mov fp,0 ; initialize frame pointer jl @main #else bl.d @main mov fp, 0 ; initialize frame pointer -#endif +#endif /* __ARCEM__ || __ARCHS__ */ ; r0 contains exit code j @exit -#if defined (__EM__) || defined (__HS__) +#if defined (__ARCEM__) || defined (__ARCHS__) ; ARCv2 default interrupt routines, defined as weak symbols. ; Default implementation halts the core. To conserve code size those symbols ; share a single implementation, however as a downside debugger and @@ -225,7 +239,7 @@ IRQ_20 : nop b .Lloop_halt nop -#endif +#endif /* __ARCEM__ || __ARCHS__ */ .section .text._exit_halt,"ax",@progbits .global _exit_halt |