asm: make all text section labels .L local

To help with backtraces if we ever fix them due to the lkmc_asm_main_after_prologue debacle.

userland/arch/aarch64/adr.S

@@ -16,6 +16,5 @@ LKMC_PROLOGUE
      */
     adr x0, data_label
     ldr x1, =data_label
-label:
     LKMC_ASSERT_EQ_REG(x0, x1)
 LKMC_EPILOGUE

userland/arch/aarch64/adrp.S

@@ -3,9 +3,9 @@
 #include <lkmc.h>
 
 LKMC_PROLOGUE
-    adrp x0, label
-    adr x1, label
-label:
+    adrp x0, .Llabel
+    adr x1, .Llabel
+.Llabel:
     /* Clear the lower 12 bits. */
     bic x1, x1, 0xFF
     bic x1, x1, 0xF00

userland/arch/aarch64/cbz.S

@@ -6,14 +6,13 @@ LKMC_PROLOGUE
 
     /* Branch. */
     mov x0, 0x0
-    cbz x0, ok
+    cbz x0, .Lok
     LKMC_ASSERT_FAIL
-ok:
+.Lok:
 
     /* Don't branch. */
     mov x0, 0x1
-    cbz x0, ko
-
+    cbz x0, .Lko
 LKMC_EPILOGUE
-ko:
+.Lko:
     LKMC_ASSERT_FAIL

userland/arch/aarch64/movk.S

@@ -17,10 +17,10 @@ LKMC_PROLOGUE
      * This could be used if the label is too far away for
      * adr relative addressing.
      */
-    movz x0, :abs_g2:label     /* bits 32-47, overflow check */
-    movk x0, :abs_g1_nc:label  /* bits 16-31, no overflow check */
-    movk x0, :abs_g0_nc:label  /* bits  0-15, no overflow check */
-    adr x1, label
-label:
+    movz x0, :abs_g2:.Llabel     /* bits 32-47, overflow check */
+    movk x0, :abs_g1_nc:.Llabel  /* bits 16-31, no overflow check */
+    movk x0, :abs_g0_nc:.Llabel  /* bits  0-15, no overflow check */
+    adr x1, .Llabel
+.Llabel:
     LKMC_ASSERT_EQ_REG(x0, x1)
 LKMC_EPILOGUE

userland/arch/aarch64/pc.S

@@ -27,11 +27,11 @@ LKMC_PROLOGUE
      * "LDR (literal)" instead of "LDR (immediate)":
      * https://stackoverflow.com/questions/28638981/howto-write-pc-relative-adressing-on-arm-asm/54480999#54480999
      */
-    ldr x0, pc_relative_ldr
-    b 1f
-pc_relative_ldr:
+    ldr x0, .Lpc_relative_ldr
+    b 2f
+.Lpc_relative_ldr:
     .quad 0x123456789ABCDEF0
-1:
+2:
     LKMC_ASSERT_EQ(x0, =0x123456789ABCDEF0)
 
     /* Just for fun, we can also use relative numbers instead of labels.
@@ -68,7 +68,7 @@ pc_relative_ldr:
     ldr x0, pc_relative_str
     LKMC_ASSERT_EQ(x0, =0x0)
     adr x1, pc_relative_str
-    ldr x0, pc_relative_ldr
+    ldr x0, .Lpc_relative_ldr
     str x0, [x1]
     ldr x0, pc_relative_str
     LKMC_ASSERT_EQ(x0, =0x123456789ABCDEF0)