symbols: add '_' to pci_drivers and cpu_drivers symbols

In order to prepare for more unification of the linker
scripts prefix pci_drivers, epci_drivers, cpu_drivers, and
ecpu_drivers with an underscore.

BUG=chrome-os-partner:44827
BRANCH=None
TEST=Built different boards includes ones w/ and w/o relocatable
     ramstage.

Change-Id: I8918b38db3b754332e8d8506b424f3c6b3e06af8
Signed-off-by: Aaron Durbin <adubin@chromium.org>
Reviewed-on: http://review.coreboot.org/11506
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/arch/arm64/cpu_ramstage.c

@@ -42,7 +42,7 @@ static struct cpu_driver *locate_cpu_driver(uint32_t midr)
 {
 	struct cpu_driver *cur;
 
-	for (cur = cpu_drivers; cur != ecpu_drivers; cur++) {
+	for (cur = _cpu_drivers; cur != _ecpu_drivers; cur++) {
 		const struct cpu_device_id *id_table = cur->id_table;
 
 		for (; id_table->midr != CPU_ID_END; id_table++) {

src/arch/x86/cpu.c

@@ -192,7 +192,7 @@ static void identify_cpu(struct device *cpu)
 struct cpu_driver *find_cpu_driver(struct device *cpu)
 {
 	struct cpu_driver *driver;
-	for (driver = cpu_drivers; driver < ecpu_drivers; driver++) {
+	for (driver = _cpu_drivers; driver < _ecpu_drivers; driver++) {
 		struct cpu_device_id *id;
 		for (id = driver->id_table;
 		     id->vendor != X86_VENDOR_INVALID; id++) {

src/device/pci_device.c

@@ -850,7 +850,7 @@ static void set_pci_ops(struct device *dev)
 	 * Look through the list of setup drivers and find one for
 	 * this PCI device.
 	 */
-	for (driver = &pci_drivers[0]; driver != &epci_drivers[0]; driver++) {
+	for (driver = &_pci_drivers[0]; driver != &_epci_drivers[0]; driver++) {
 		if ((driver->vendor == dev->vendor) &&
 		    device_id_match(driver, dev->device)) {
 			dev->ops = (struct device_operations *)driver->ops;

src/include/cpu/cpu.h

@@ -18,9 +18,9 @@ void smm_setup_structures(void *gnvs, void *tcg, void *smi1);
 #define __cpu_driver __attribute__ ((used,__section__(".rodata.cpu_driver")))
 #ifndef __SIMPLE_DEVICE__
 /** start of compile time generated pci driver array */
-extern struct cpu_driver cpu_drivers[];
+extern struct cpu_driver _cpu_drivers[];
 /** end of compile time generated pci driver array */
-extern struct cpu_driver ecpu_drivers[];
+extern struct cpu_driver _ecpu_drivers[];
 #endif
 #endif /* !__PRE_RAM__ && !__SMM__ */
 

src/include/device/pci.h

@@ -55,9 +55,9 @@ struct pci_driver {
 
 #define __pci_driver __attribute__ ((used,__section__(".rodata.pci_driver")))
 /** start of compile time generated pci driver array */
-extern struct pci_driver pci_drivers[];
+extern struct pci_driver _pci_drivers[];
 /** end of compile time generated pci driver array */
-extern struct pci_driver epci_drivers[];
+extern struct pci_driver _epci_drivers[];
 
 
 extern struct device_operations default_pci_ops_dev;

src/lib/ramstage.ld

@@ -53,12 +53,12 @@
 	/* If any changes are made to the driver start/symbols or the
 	 * section names the equivalent changes need to made to
 	 * rmodule.ld. */
-	pci_drivers = . ;
+	_pci_drivers = . ;
 	KEEP(*(.rodata.pci_driver));
-	epci_drivers = . ;
+	_epci_drivers = . ;
-	cpu_drivers = . ;
+	_cpu_drivers = . ;
 	KEEP(*(.rodata.cpu_driver));
-	ecpu_drivers = . ;
+	_ecpu_drivers = . ;
 	_bs_init_begin = .;
 	KEEP(*(.bs_init));
 	LONG(0);

src/lib/rmodule.ld

@@ -42,13 +42,13 @@ SECTIONS
 		 * ramstage with the rmodule linker. Any changes made in
 		 * ramstage.ld should be made here as well. */
 		. = ALIGN(8);
-		pci_drivers = . ;
+		_pci_drivers = . ;
 		KEEP(*(.rodata.pci_driver));
-		epci_drivers = . ;
+		_epci_drivers = . ;
 		. = ALIGN(8);
-		cpu_drivers = . ;
+		_cpu_drivers = . ;
 		KEEP(*(.rodata.cpu_driver));
-		ecpu_drivers = . ;
+		_ecpu_drivers = . ;
 		. = ALIGN(8);
 		_bs_init_begin = .;
 		KEEP(*(.bs_init));