Reduce warnings/errors in libpayload when using picky compiler options

The new build system uses quite a few more -W flags for the compiler by
default than the old one. And that's for the better.

Change-Id: Ia8e3d28fb35c56760c2bd0983046c7067e8c5dd6
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/72
Tested-by: build bot (Jenkins)
Reviewed-by: Uwe Hermann <uwe@hermann-uwe.de>

20 files changed, 50 insertions, 41 deletions

diff --git a/payloads/libpayload/Config.in b/payloads/libpayload/Config.in
index 0a9265d733..fe534001bb 100644
--- a/payloads/libpayload/Config.in
+++ b/payloads/libpayload/Config.in
@@ -73,6 +73,10 @@ config TARGET_POWERPC
 
 endchoice
 
+config MEMMAP_RAM_ONLY
+	bool "Only consider RAM entries in memory map for further processing"
+	default n
+
 config MULTIBOOT
 	bool "Multiboot header support"
 	depends on TARGET_I386
diff --git a/payloads/libpayload/arch/i386/coreboot.c b/payloads/libpayload/arch/i386/coreboot.c
index 8441903e7c..e3c944d443 100644
--- a/payloads/libpayload/arch/i386/coreboot.c
+++ b/payloads/libpayload/arch/i386/coreboot.c
@@ -57,7 +57,7 @@ static void cb_parse_memory(unsigned char *ptr, struct sysinfo_t *info)
 		struct cb_memory_range *range =
 		    (struct cb_memory_range *)MEM_RANGE_PTR(mem, i);
 
-#if MEMMAP_RAM_ONLY
+#ifdef CONFIG_MEMMAP_RAM_ONLY
 		if (range->type != CB_MEM_RAM)
 			continue;
 #endif
diff --git a/payloads/libpayload/arch/i386/main.c b/payloads/libpayload/arch/i386/main.c
index 48d6ef5495..378c6f387f 100644
--- a/payloads/libpayload/arch/i386/main.c
+++ b/payloads/libpayload/arch/i386/main.c
@@ -41,6 +41,7 @@ char *main_argv[MAX_ARGC_COUNT];
  * This is our C entry function - set up the system
  * and jump into the payload entry point.
  */
+void start_main(void);
 void start_main(void)
 {
 	extern int main(int argc, char **argv);
diff --git a/payloads/libpayload/arch/i386/multiboot.c b/payloads/libpayload/arch/i386/multiboot.c
index 82736b14fe..fa0c576dc9 100644
--- a/payloads/libpayload/arch/i386/multiboot.c
+++ b/payloads/libpayload/arch/i386/multiboot.c
@@ -45,7 +45,7 @@ static void mb_parse_mmap(struct multiboot_header *table,
 	while(ptr < (start + table->mmap_length)) {
 		struct multiboot_mmap *mmap = (struct multiboot_mmap *) ptr;
 
-#if MEMMAP_RAM_ONLY
+#ifdef CONFIG_MEMMAP_RAM_ONLY
 		/* 1 == normal RAM.  Ignore everything else for now */
 
 		if (mmap->type == 1) {
@@ -56,7 +56,7 @@ static void mb_parse_mmap(struct multiboot_header *table,
 
 			if (++info->n_memranges == SYSINFO_MAX_MEM_RANGES)
 				return;
-#if MEMMAP_RAM_ONLY
+#ifdef CONFIG_MEMMAP_RAM_ONLY
 		}
 #endif
 
diff --git a/payloads/libpayload/arch/i386/virtual.c b/payloads/libpayload/arch/i386/virtual.c
index 256bfc25f7..59768dbd66 100644
--- a/payloads/libpayload/arch/i386/virtual.c
+++ b/payloads/libpayload/arch/i386/virtual.c
@@ -27,6 +27,7 @@
  * SUCH DAMAGE.
  */
 
+#include <unistd.h>
 
 unsigned long virtual_offset = 0;
 
diff --git a/payloads/libpayload/arch/powerpc/coreboot.c b/payloads/libpayload/arch/powerpc/coreboot.c
index 95d8f16f76..ee1842c82f 100644
--- a/payloads/libpayload/arch/powerpc/coreboot.c
+++ b/payloads/libpayload/arch/powerpc/coreboot.c
@@ -57,7 +57,7 @@ static void cb_parse_memory(unsigned char *ptr, struct sysinfo_t *info)
 		struct cb_memory_range *range =
 		    (struct cb_memory_range *)MEM_RANGE_PTR(mem, i);
 
-#if MEMMAP_RAM_ONLY
+#ifdef CONFIG_MEMMAP_RAM_ONLY
 		if (range->type != CB_MEM_RAM)
 			continue;
 #endif
diff --git a/payloads/libpayload/arch/powerpc/main.c b/payloads/libpayload/arch/powerpc/main.c
index 48d6ef5495..378c6f387f 100644
--- a/payloads/libpayload/arch/powerpc/main.c
+++ b/payloads/libpayload/arch/powerpc/main.c
@@ -41,6 +41,7 @@ char *main_argv[MAX_ARGC_COUNT];
  * This is our C entry function - set up the system
  * and jump into the payload entry point.
  */
+void start_main(void);
 void start_main(void)
 {
 	extern int main(int argc, char **argv);
diff --git a/payloads/libpayload/arch/powerpc/virtual.c b/payloads/libpayload/arch/powerpc/virtual.c
index 6312ae13ca..6ff588c504 100644
--- a/payloads/libpayload/arch/powerpc/virtual.c
+++ b/payloads/libpayload/arch/powerpc/virtual.c
@@ -27,6 +27,7 @@
  * SUCH DAMAGE.
  */
 
+#include <unistd.h>
 
 unsigned long virtual_offset = 0;
 
diff --git a/payloads/libpayload/curses/keyboard.c b/payloads/libpayload/curses/keyboard.c
index a750675995..7ebb04f111 100644
--- a/payloads/libpayload/curses/keyboard.c
+++ b/payloads/libpayload/curses/keyboard.c
@@ -71,7 +71,7 @@ static int getkeyseq(char *buffer, int len, int max)
 }
 
 static struct {
-	char *seq;
+	const char *seq;
 	int key;
 } escape_codes[] = {
 	{ "[A", KEY_UP },
@@ -109,7 +109,7 @@ static int handle_escape(void)
 		return 27;
 
 	for(i = 0; escape_codes[i].seq != NULL; i++) {
-		char *p = escape_codes[i].seq;
+		const char *p = escape_codes[i].seq;
 
 		for(t = 0; t < len; t++) {
 			if (!*p || *p != buffer[t])
@@ -144,7 +144,7 @@ static int cook_serial(unsigned char ch)
 
 /* ================ Keyboard ================ */
 
-static int curses_getchar(int delay)
+static int curses_getchar(int _delay)
 {
 #if defined(CONFIG_USB_HID) || defined(CONFIG_PC_KEYBOARD) || defined(CONFIG_SERIAL_CONSOLE)
 	unsigned short c;
@@ -175,12 +175,12 @@ static int curses_getchar(int delay)
 		}
 #endif
 
-		if (delay == 0)
+		if (_delay == 0)
 			break;
 
-		if (delay > 0) {
+		if (_delay > 0) {
 			mdelay(1);
-			delay--;
+			_delay--;
 		}
 
 
@@ -193,14 +193,14 @@ static int curses_getchar(int delay)
 
 int wgetch(WINDOW *win)
 {
-	int delay = -1;
+	int _delay = -1;
 
 	if (_halfdelay)
-		delay = _halfdelay;
+		_delay = _halfdelay;
 	else
-		delay = win->_delay;
+		_delay = win->_delay;
 
-	return curses_getchar(delay);
+	return curses_getchar(_delay);
 }
 
 int nodelay(WINDOW *win, NCURSES_BOOL flag)
diff --git a/payloads/libpayload/curses/tinycurses.c b/payloads/libpayload/curses/tinycurses.c
index cb1d695933..4d3e8e1be2 100644
--- a/payloads/libpayload/curses/tinycurses.c
+++ b/payloads/libpayload/curses/tinycurses.c
@@ -971,7 +971,7 @@ int wsetscrreg(WINDOW *win, int top, int bottom)
 }
 // void wsyncdown (WINDOW *) {}
 // void wsyncup (WINDOW *) {}
-/* D */ void wtimeout(WINDOW *win, int delay) { win->_delay = delay; }
+/* D */ void wtimeout(WINDOW *win, int _delay) { win->_delay = _delay; }
 /* D */ int wtouchln(WINDOW *win, int y, int n, int changed)
 {
 	int i;
diff --git a/payloads/libpayload/drivers/keyboard.c b/payloads/libpayload/drivers/keyboard.c
index 2b2ac2685d..0663f47bc6 100644
--- a/payloads/libpayload/drivers/keyboard.c
+++ b/payloads/libpayload/drivers/keyboard.c
@@ -37,8 +37,8 @@
 #define I8042_MODE_XLATE     0x40
 
 struct layout_maps {
-	char *country;
-	unsigned short map[4][0x57];
+	const char *country;
+	const unsigned short map[4][0x57];
 };
 
 static struct layout_maps *map;
@@ -261,22 +261,22 @@ int keyboard_getchar(void)
 
 static int keyboard_wait_read(void)
 {
-	int timeout = 10000;
+	int retries = 10000;
 
-	while(timeout-- && !(inb(0x64) & 0x01))
+	while(retries-- && !(inb(0x64) & 0x01))
 		udelay(50);
 
-	return (timeout <= 0) ? -1 : 0;
+	return (retries <= 0) ? -1 : 0;
 }
 
 static int keyboard_wait_write(void)
 {
-	int timeout = 10000;
+	int retries = 10000;
 
-	while(timeout-- && (inb(0x64) & 0x02))
+	while(retries-- && (inb(0x64) & 0x02))
 		udelay(50);
 
-	return (timeout <= 0) ? -1 : 0;
+	return (retries <= 0) ? -1 : 0;
 }
 
 static unsigned char keyboard_get_mode(void)
diff --git a/payloads/libpayload/drivers/serial.c b/payloads/libpayload/drivers/serial.c
index 0674ec8c38..c6804d2b2a 100644
--- a/payloads/libpayload/drivers/serial.c
+++ b/payloads/libpayload/drivers/serial.c
@@ -195,7 +195,7 @@ int serial_getchar(void)
 /* A vt100 doesn't do color, setaf/setab below are from xterm-color. */
 #define VT100_SET_COLOR   "\e[3%d;4%dm"
 
-static void serial_putcmd(char *str)
+static void serial_putcmd(const char *str)
 {
 	while(*str)
 		serial_putchar(*(str++));
diff --git a/payloads/libpayload/drivers/usb/uhci.c b/payloads/libpayload/drivers/usb/uhci.c
index 721fde00f7..1f80c6a3c6 100644
--- a/payloads/libpayload/drivers/usb/uhci.c
+++ b/payloads/libpayload/drivers/usb/uhci.c
@@ -65,7 +65,7 @@ static void
 td_dump (td_t *td)
 {
 	char td_value[3];
-	char *td_type;
+	const char *td_type;
 	switch (td->pid) {
 		case UHCI_SETUP:
 			td_type="SETUP";
diff --git a/payloads/libpayload/drivers/usb/usbhid.c b/payloads/libpayload/drivers/usb/usbhid.c
index 84de0c8afb..bf3ec1e407 100644
--- a/payloads/libpayload/drivers/usb/usbhid.c
+++ b/payloads/libpayload/drivers/usb/usbhid.c
@@ -62,7 +62,7 @@ static int keycount;
 #define KEYBOARD_BUFFER_SIZE 16
 static short keybuffer[KEYBOARD_BUFFER_SIZE];
 
-char *countries[36][2] = {
+const char *countries[36][2] = {
 	{ "not supported", "us" },
 	{ "Arabic", "ae" },
 	{ "Belgian", "be" },
@@ -105,13 +105,13 @@ char *countries[36][2] = {
 
 
 struct layout_maps {
-	char *country;
-	short map[4][0x80];
+	const char *country;
+	const short map[4][0x80];
 };
 
-static struct layout_maps *map;
+static const struct layout_maps *map;
 
-static struct layout_maps keyboard_layouts[] = {
+static const struct layout_maps keyboard_layouts[] = {
 // #ifdef CONFIG_PC_KEYBOARD_LAYOUT_US
 { .country = "us", .map = {
 	{ /* No modifier */
@@ -378,7 +378,7 @@ static struct console_input_driver cons = {
 };
 
 
-int usb_hid_set_layout (char *country)
+static int usb_hid_set_layout (const char *country)
 {
 	/* FIXME should be per keyboard */
 	int i;
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h
index 74fb79a4ae..6ce7548b3d 100644
--- a/payloads/libpayload/include/libpayload.h
+++ b/payloads/libpayload/include/libpayload.h
@@ -272,6 +272,7 @@ typedef struct {
 void SHA1Init(SHA1_CTX *context);
 void SHA1Transform(u32 state[5], const u8 buffer[SHA1_BLOCK_LENGTH]);
 void SHA1Update(SHA1_CTX *context, const u8 *data, size_t len);
+void SHA1Pad(SHA1_CTX *context);
 void SHA1Final(u8 digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context);
 u8 *sha1(const u8 *data, size_t len, u8 *buf);
 /** @} */
diff --git a/payloads/libpayload/libc/getopt_long.c b/payloads/libpayload/libc/getopt_long.c
index 493df4d3b3..365bc4a85a 100644
--- a/payloads/libpayload/libc/getopt_long.c
+++ b/payloads/libpayload/libc/getopt_long.c
@@ -57,10 +57,8 @@
 #include <libpayload.h>
 #include <getopt.h>
 #define warnx(x...) printf(x)
-/*
 #include <stdlib.h>
 #include <string.h>
-*/
 #define	REPLACE_GETOPT		/* use this getopt as the system getopt(3) */
 
 #ifdef REPLACE_GETOPT
@@ -84,7 +82,7 @@ int posixly_correct = 0;
 #define	BADARG		((*options == ':') ? (int)':' : (int)'?')
 #define	INORDER 	(int)1
 
-#define	EMSG		""
+#define	EMSG		(char*)""
 
 static int getopt_internal(int, char * const *, const char *,
 			   const struct option *, int *, int);
diff --git a/payloads/libpayload/libc/printf.c b/payloads/libpayload/libc/printf.c
index 389d2277ea..e3cf8bbb24 100644
--- a/payloads/libpayload/libc/printf.c
+++ b/payloads/libpayload/libc/printf.c
@@ -114,7 +114,7 @@ static int printf_putstr(const char *str, struct printf_spec *ps)
 	size_t count;
 
 	if (str == NULL) {
-		char *nullstr = "(NULL)";
+		const char *nullstr = "(NULL)";
 		return printf_putnchars(nullstr, strlen(nullstr), ps);
 	}
 
diff --git a/payloads/libpayload/libc/strings.c b/payloads/libpayload/libc/strings.c
index 9a56ba127c..465ae4f12d 100644
--- a/payloads/libpayload/libc/strings.c
+++ b/payloads/libpayload/libc/strings.c
@@ -27,6 +27,8 @@
  * SUCH DAMAGE.
  */
 
+#include <strings.h>
+
 int ffs(int i)
 {
 	int count = 1;
diff --git a/payloads/libpayload/libc/sysinfo.c b/payloads/libpayload/libc/sysinfo.c
index 73a9ab5539..b1cad50302 100644
--- a/payloads/libpayload/libc/sysinfo.c
+++ b/payloads/libpayload/libc/sysinfo.c
@@ -30,8 +30,6 @@
 #include <libpayload.h>
 #include <sysinfo.h>
 
-extern struct sysinfo_t lib_sysinfo;
-
 int sysinfo_have_multiboot(unsigned long *addr)
 {
 	*addr = (unsigned long) lib_sysinfo.mbtable;
diff --git a/payloads/libpayload/libpci/libpci.c b/payloads/libpayload/libpci/libpci.c
index 0b54ba338c..203e770e47 100644
--- a/payloads/libpayload/libpci/libpci.c
+++ b/payloads/libpayload/libpci/libpci.c
@@ -96,6 +96,8 @@ void pci_filter_init(struct pci_access* pacc, struct pci_filter* pf)
 	pf->device = -1;
 }
 
+static char *invalid_pci_device_string = (char *)"invalid pci device string";
+
 /* parse domain:bus:dev.func (with all components but "dev" optional)
  * into filter.
  * Returns NULL on success, a string pointer to the error message otherwise.
@@ -109,7 +111,7 @@ char *pci_filter_parse_slot(struct pci_filter* filter, const char* id)
 	char *funcp = strrchr(id, '.');
 	if (funcp) {
 		filter->func = strtoul(funcp+1, &endptr, 0);
-		if (endptr[0] != '\0') return "invalid pci device string";
+		if (endptr[0] != '\0') return invalid_pci_device_string;
 	}
 
 	char *devp = strrchr(id, ':');
@@ -118,7 +120,7 @@ char *pci_filter_parse_slot(struct pci_filter* filter, const char* id)
 	} else {
 		filter->dev = strtoul(devp+1, &endptr, 0);
 	}
-	if (endptr != funcp) return "invalid pci device string";
+	if (endptr != funcp) return invalid_pci_device_string;
 	if (!devp) return NULL;
 
 	char *busp = strchr(id, ':');
@@ -127,11 +129,11 @@ char *pci_filter_parse_slot(struct pci_filter* filter, const char* id)
 	} else {
 		filter->bus = strtoul(busp+1, &endptr, 0);
 	}
-	if (endptr != funcp) return "invalid pci device string";
+	if (endptr != funcp) return invalid_pci_device_string;
 	if (busp == devp) return NULL;
 
 	filter->domain = strtoul(id, &endptr, 0);
-	if (endptr != busp) return "invalid pci device string";
+	if (endptr != busp) return invalid_pci_device_string;
 
 	return NULL;
 }