5 files changed, 18 insertions, 4 deletions

diff --git a/firmware/asm/arm/corelock.c b/firmware/asm/arm/corelock.c
index 07ec77a60e..a60299436f 100644
--- a/firmware/asm/arm/corelock.c
+++ b/firmware/asm/arm/corelock.c
@@ -61,7 +61,7 @@ int corelock_try_lock(struct corelock *cl)
 
     /* Relies on the fact that core IDs are complementary bitmasks (0x55,0xaa) */
     asm volatile (
-        ".syntax unified             \n"
+        BEGIN_ARM_ASM_SYNTAX_UNIFIED
         "mov    r1, %[id]            \n" /* r1 = PROCESSOR_ID */
         "ldrb   r1, [r1]             \n"
         "strb   r1, [%[cl], r1, lsr #7] \n" /* cl->myl[core] = core */
@@ -74,6 +74,7 @@ int corelock_try_lock(struct corelock *cl)
         "ands   %[rv], %[rv], r1     \n"
         "strbeq %[rv], [%[cl], r1, lsr #7] \n" /* if not, cl->myl[core] = 0 */
     "1:                              \n" /* Done */
+        END_ARM_ASM_SYNTAX_UNIFIED
         : [rv] "=r"(rval)
         : [id] "i" (&PROCESSOR_ID), [cl] "r" (cl)
         : "r1","r2","cc"
diff --git a/firmware/asm/arm/thread.c b/firmware/asm/arm/thread.c
index bd9f950616..30df56e0d9 100644
--- a/firmware/asm/arm/thread.c
+++ b/firmware/asm/arm/thread.c
@@ -73,7 +73,7 @@ static inline void store_context(void* addr)
 static inline void load_context(const void* addr)
 {
     asm volatile(
-        ".syntax unified                \n"
+        BEGIN_ARM_ASM_SYNTAX_UNIFIED
         "ldr     r0, [%0, #40]          \n" /* Load start pointer */
         "cmp     r0, #0                 \n" /* Check for NULL */
 
@@ -86,6 +86,7 @@ static inline void load_context(const void* addr)
 #endif
 
         "ldmia   %0, { r4-r11, sp, lr } \n" /* Load regs r4 to r14 from context */
+        END_ARM_ASM_SYNTAX_UNIFIED
         : : "r" (addr) : "r0" /* only! */
     );
 }
diff --git a/firmware/export/config.h b/firmware/export/config.h
index 19ee03b4c7..49cd6d610c 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -1005,6 +1005,16 @@ Lyre prototype 1 */
 #define ROCKBOX_STRICT_ALIGN 1
 #endif
 
+/*
+ * 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
+ */
+#define BEGIN_ARM_ASM_SYNTAX_UNIFIED ".syntax unified\n"
+#define END_ARM_ASM_SYNTAX_UNIFIED   ".syntax divided\n"
+
 #if defined(CPU_ARM) && defined(__ASSEMBLER__)
 .syntax unified
 /* ARMv4T doesn't switch the T bit when popping pc directly, we must use BX */
diff --git a/firmware/target/arm/pcm-telechips.c b/firmware/target/arm/pcm-telechips.c
index 747765d8fb..45044bc664 100644
--- a/firmware/target/arm/pcm-telechips.c
+++ b/firmware/target/arm/pcm-telechips.c
@@ -218,7 +218,7 @@ void fiq_handler(void)
      * r0-r3 and r12 is a working register.
      */
     asm volatile (
-        ".syntax unified             \n"
+        BEGIN_ARM_ASM_SYNTAX_UNIFIED
         "sub     lr, lr, #4          \n"
         "stmfd   sp!, { r0-r3, lr }  \n" /* stack scratch regs and lr */
         "mov     r14, #0             \n" /* Was the callback called? */
@@ -274,6 +274,7 @@ void fiq_handler(void)
         "bhi     .fill_fifo          \n" /* not stop and enough? refill */
         "ldmfd   sp!, { r0-r3, pc }^ \n" /* exit */
         ".ltorg                      \n"
+        END_ARM_ASM_SYNTAX_UNIFIED
         : : "i"(PCM_DMAST_OK), "i"(PCM_DMAST_STARTED)
     );
 }
diff --git a/firmware/target/arm/pp/pcm-pp.c b/firmware/target/arm/pp/pcm-pp.c
index fd798f0506..94b1c5ae10 100644
--- a/firmware/target/arm/pp/pcm-pp.c
+++ b/firmware/target/arm/pp/pcm-pp.c
@@ -327,7 +327,7 @@ void fiq_playback(void)
      */
     asm volatile (
     /* No external calls */
-        ".syntax unified              \n"
+        BEGIN_ARM_ASM_SYNTAX_UNIFIED
         "sub     lr, lr, #4           \n" /* Prepare return address */
         "stmfd   sp!, { lr }          \n" /* stack lr so we can use it */
         "ldr     r12, =0xcf001040     \n" /* Some magic from iPodLinux ... */
@@ -395,6 +395,7 @@ void fiq_playback(void)
         "bne     3b                   \n" /* no? -> go return */
         "b       2b                   \n" /* yes -> get even more */
         ".ltorg                       \n"
+        END_ARM_ASM_SYNTAX_UNIFIED
         : /* These must only be integers! No regs */
         : "i"(PCM_DMAST_OK), "i"(PCM_DMAST_STARTED));
 }