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arm: Use -masm-syntax-unified when compiling with gcc8 or newer

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Annoyingly, this makes all of the '.S' files we compile get treated as
divided syntax, so we need to make the syntax in them explicit.

Change-Id: I56a3916b7b24c84a1214a5d6bc4ed4d651f002cf
This commit is contained in:
Solomon Peachy 2023-05-24 09:37:20 -04:00
parent 0a89d1d4df
commit 8c86fb6da0
17 changed files with 43 additions and 3 deletions
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12
firmware/export/config.h
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@ -1018,14 +1018,19 @@ Lyre prototype 1 */
* These macros are for switching on unified syntax in inline assembly.
* Older versions of GCC emit assembly in divided syntax with no option
* to enable unified syntax.
*
* FIXME: This needs to be looked at after the toolchain bump
*/
#if (__GNUC__ < 8)
#define BEGIN_ARM_ASM_SYNTAX_UNIFIED ".syntax unified\n"
#define END_ARM_ASM_SYNTAX_UNIFIED ".syntax divided\n"
#else
#define BEGIN_ARM_ASM_SYNTAX_UNIFIED
#define END_ARM_ASM_SYNTAX_UNIFIED
#endif
#if defined(CPU_ARM) && defined(__ASSEMBLER__)
#if (__GNUC__ < 8)
.syntax unified
#endif
/* ARMv4T doesn't switch the T bit when popping pc directly, we must use BX */
.macro ldmpc cond="", order="ia", regs
#if ARM_ARCH == 4 && defined(USE_THUMB)
@ -1043,6 +1048,9 @@ Lyre prototype 1 */
ldr\cond pc, [sp], #4
#endif
.endm
#if (__GNUC__ < 8)
.syntax divided
#endif
#endif
#if defined(CPU_COLDFIRE) && defined(__ASSEMBLER__)