[i386] Add explicit flags and type on all .section declarations

Try to avoid future problems caused by implicit section flags and/or
type information by instituting a policy that all .section
declarations must explicitly state the flags and type.

Most of this change was achieved using

    perl -pi \
      -e 's/".text"$/".text", "ax", \@progbits/ ; ' \
      -e 's/".text16"$/".text16", "ax", \@progbits/ ; ' \
      -e 's/".text16.null"$/".text16.null", "ax", \@progbits/ ; ' \
      -e 's/".text16.data"$/".text16.data", "aw", \@progbits/ ; ' \
      -e 's/".data"$/".data", "aw", \@progbits/ ; ' \
      -e 's/".data16"$/".data16", "aw", \@progbits/ ; ' \
      -e 's/".bss"$/".bss", "aw", \@nobits/ ; ' \
      -e 's/".bss16"$/".bss16", "aw", \@nobits/ ; ' \
      -e 's/".prefix"$/".prefix", "ax", \@progbits/ ; ' \
      -e 's/".prefix.lib"$/".prefix.lib", "awx", \@progbits/ ; ' \
      -e 's/".prefix.data"$/".prefix.data", "aw", \@progbits/ ; ' \
      -e 's/".weak"$/".weak", "a", \@nobits/ ; ' \
      `git grep -l '\.section'`

src/arch/i386/firmware/pcbios/e820mangler.S

@@ -18,9 +18,6 @@
 	
 	.text
 	.arch i386
-	.section ".text16", "ax", @progbits
-	.section ".data16", "aw", @progbits
-	.section ".text16.data", "aw", @progbits
 	.code16
 
 #define SMAP 0x534d4150
@@ -62,7 +59,7 @@
  *
  ****************************************************************************
  */
-	.section ".data16"
+	.section ".data16", "aw", @progbits
 	.align 16
 	.globl hidemem_base
 	.globl hidemem_umalloc
@@ -94,7 +91,7 @@ memory_windows_end:
  *  %ecx:%ebx	Length of windowed region
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 window_region:
 	/* Convert (start,len) to (start, end) */
 	addl	%eax, %ebx
@@ -132,7 +129,7 @@ window_region:
  *  %ax		Modified memory above 1M in 1kB blocks
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 patch_1m:
 	pushal
 	/* Convert to (start,len) format and call truncate */
@@ -162,7 +159,7 @@ patch_1m:
  *  %bx		Modified memory above 16M in 64kB blocks
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 patch_16m:
 	pushal
 	/* Convert to (start,len) format and call truncate */
@@ -193,7 +190,7 @@ patch_16m:
  *  %bx		Modified memory above 16MB, in 64kB blocks
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 patch_1m_16m:
 	call	patch_1m
 	call	patch_16m
@@ -219,7 +216,7 @@ patch_1m_16m:
  *
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 get_underlying_e820:
 
 	/* If the requested region is in the cache, return it */
@@ -308,22 +305,22 @@ get_underlying_e820:
 	jmp	get_underlying_e820
 	.size	get_underlying_e820, . - get_underlying_e820
 
-	.section ".data16"
+	.section ".data16", "aw", @progbits
 underlying_e820_index:
 	.word	0xffff /* Initialise to an invalid value */
 	.size underlying_e820_index, . - underlying_e820_index
 
-	.section ".bss16"
+	.section ".bss16", "aw", @nobits
 underlying_e820_ebx:
 	.long	0
 	.size underlying_e820_ebx, . - underlying_e820_ebx
 
-	.section ".bss16"
+	.section ".bss16", "aw", @nobits
 underlying_e820_cache:
 	.space	E820MAXSIZE
 	.size underlying_e820_cache, . - underlying_e820_cache
 
-	.section ".bss16"
+	.section ".bss16", "aw", @nobits
 underlying_e820_cache_size:
 	.long	0
 	.size	underlying_e820_cache_size, . - underlying_e820_cache_size
@@ -342,7 +339,7 @@ underlying_e820_cache_size:
  *
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 get_windowed_e820:
 
 	/* Preserve registers */
@@ -417,7 +414,7 @@ get_windowed_e820:
  *
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 get_nonempty_e820:
 
 	/* Record entry parameters */
@@ -462,7 +459,7 @@ get_nonempty_e820:
  *
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 get_mangled_e820:
 
 	/* Get a nonempty region */
@@ -496,7 +493,7 @@ get_mangled_e820:
  * INT 15,e820 handler
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 int15_e820:
 	pushw	%ds
 	pushw	%cs:rm_ds
@@ -510,7 +507,7 @@ int15_e820:
  * INT 15,e801 handler
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 int15_e801:
 	/* Call previous handler */
 	pushfw
@@ -536,7 +533,7 @@ int15_e801:
  * INT 15,88 handler
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 int15_88:
 	/* Call previous handler */
 	pushfw
@@ -557,7 +554,7 @@ int15_88:
  * INT 15 handler
  ****************************************************************************
  */
-	.section ".text16"
+	.section ".text16", "ax", @progbits
 	.globl int15
 int15:
 	/* See if we want to intercept this call */
@@ -580,7 +577,7 @@ int15:
 	ljmp	*%cs:int15_vector
 	.size int15, . - int15
 	
-	.section ".text16.data"
+	.section ".text16.data", "aw", @progbits
 	.globl int15_vector
 int15_vector:
 	.long 0