Convince compilers to put constant data into the .rodata section
This patch reduces the stack usage by declaring 'const' stack variables
as 'static const' so they end up in the .rodata section instead of being
copied from there to the stack for every invocation of the corresponding
function.
As a plus we end up in having a smaller binary as the "copy from .rodata
to stack" code isn't emitted by the compiler any more (roughly -100
bytes).
Corresponding to flashrom svn r1252.
Signed-off-by: Mathias Krause <mathias.krause@secunet.com>
Acked-by: Stefan Reinauer <stepan@coreboot.org>
diff --git a/cli_classic.c b/cli_classic.c
index 9b9b451..1211989 100644
--- a/cli_classic.c
+++ b/cli_classic.c
@@ -114,8 +114,8 @@
int operation_specified = 0;
int i;
- const char *optstring = "r:Rw:v:nVEfc:m:l:i:p:Lzh";
- static struct option long_options[] = {
+ static const char optstring[] = "r:Rw:v:nVEfc:m:l:i:p:Lzh";
+ static const struct option long_options[] = {
{"read", 1, 0, 'r'},
{"write", 1, 0, 'w'},
{"erase", 0, 0, 'E'},
diff --git a/flash.h b/flash.h
index 250482f..91c4cf3 100644
--- a/flash.h
+++ b/flash.h
@@ -188,7 +188,7 @@
};
extern enum chipbustype buses_supported;
extern int verbose;
-extern const char * const flashrom_version;
+extern const char flashrom_version[];
extern char *chip_to_probe;
void map_flash_registers(struct flashchip *flash);
int read_memmapped(struct flashchip *flash, uint8_t *buf, int start, int len);
diff --git a/flashrom.c b/flashrom.c
index f3497d0..938579c 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -38,7 +38,7 @@
#include "flashchips.h"
#include "programmer.h"
-const char * const flashrom_version = FLASHROM_VERSION;
+const char flashrom_version[] = FLASHROM_VERSION;
char *chip_to_probe = NULL;
int verbose = 0;
diff --git a/ichspi.c b/ichspi.c
index a087a0b..66c8d51 100644
--- a/ichspi.c
+++ b/ichspi.c
@@ -948,10 +948,10 @@
static void do_ich9_spi_frap(uint32_t frap, int i)
{
- const char *access_names[4] = {
+ static const char *const access_names[4] = {
"locked", "read-only", "write-only", "read-write"
};
- const char *region_names[5] = {
+ static const char *const region_names[5] = {
"Flash Descriptor", "BIOS", "Management Engine",
"Gigabit Ethernet", "Platform Data"
};
diff --git a/print_wiki.c b/print_wiki.c
index 48e0122..db5743e 100644
--- a/print_wiki.c
+++ b/print_wiki.c
@@ -27,7 +27,7 @@
#include "flashchips.h"
#include "programmer.h"
-static const char * const wiki_header = "= Supported devices =\n\n\
+static const char wiki_header[] = "= Supported devices =\n\n\
<div style=\"margin-top:0.5em; padding:0.5em 0.5em 0.5em 0.5em; \
background-color:#eeeeee; align:right; border:1px solid #aabbcc;\"><small>\n\
Please do '''not''' edit these tables in the wiki directly, they are \
@@ -35,16 +35,16 @@
'''Last update:''' %s(generated by flashrom %s)\n</small></div>\n";
#if CONFIG_INTERNAL == 1
-static const char * const chipset_th = "{| border=\"0\" style=\"font-size: smaller\"\n\
+static const char chipset_th[] = "{| border=\"0\" style=\"font-size: smaller\"\n\
|- bgcolor=\"#6699dd\"\n! align=\"left\" | Vendor\n\
! align=\"left\" | Southbridge\n! align=\"left\" | PCI IDs\n\
! align=\"left\" | Status\n\n";
-static const char * const board_th = "{| border=\"0\" style=\"font-size: smaller\" \
+static const char board_th[] = "{| border=\"0\" style=\"font-size: smaller\" \
valign=\"top\"\n|- bgcolor=\"#6699dd\"\n! align=\"left\" | Vendor\n\
! align=\"left\" | Mainboard\n! align=\"left\" | Required option\n! align=\"left\" | Status\n\n";
-static const char * const board_intro = "\
+static const char board_intro[] = "\
\n== Supported mainboards ==\n\n\
In general, it is very likely that flashrom works out of the box even if your \
mainboard is not listed below.\n\nThis is a list of mainboards where we have \
@@ -57,14 +57,14 @@
mainboards on the [[Mailinglist|mailing list]].\n";
#endif
-static const char * const chip_th = "{| border=\"0\" style=\"font-size: smaller\" \
+static const char chip_th[] = "{| border=\"0\" style=\"font-size: smaller\" \
valign=\"top\"\n|- bgcolor=\"#6699dd\"\n! align=\"left\" | Vendor\n\
! align=\"left\" | Device\n! align=\"left\" | Size / KB\n\
! align=\"left\" | Type\n! align=\"left\" colspan=\"4\" | Status\n\n\
|- bgcolor=\"#6699ff\"\n| colspan=\"4\" | \n\
| Probe\n| Read\n| Erase\n| Write\n\n";
-static const char * const programmer_section = "\
+static const char programmer_section[] = "\
\n== Supported programmers ==\n\nThis is a list \
of supported PCI devices flashrom can use as programmer:\n\n{| border=\"0\" \
valign=\"top\"\n| valign=\"top\"|\n\n{| border=\"0\" style=\"font-size: \
@@ -73,7 +73,7 @@
! align=\"left\" | Status\n\n";
#if CONFIG_INTERNAL == 1
-static const char * const laptop_intro = "\n== Supported laptops/notebooks ==\n\n\
+static const char laptop_intro[] = "\n== Supported laptops/notebooks ==\n\n\
In general, flashing laptops is more difficult because laptops\n\n\
* often use the flash chip for stuff besides the BIOS,\n\
* often have special protection stuff which has to be handled by flashrom,\n\
@@ -167,9 +167,9 @@
if (boards[i].note) {
printf("<sup>%d</sup>\n", num_notes + 1);
- snprintf((char *)&tmp, 900, "<sup>%d</sup> %s<br />\n",
+ snprintf(tmp, sizeof(tmp), "<sup>%d</sup> %s<br />\n",
1 + num_notes++, boards[i].note);
- notes = strcat_realloc(notes, (char *)&tmp);
+ notes = strcat_realloc(notes, tmp);
} else {
printf("\n");
}
diff --git a/sb600spi.c b/sb600spi.c
index 4e3e079..845cf58 100644
--- a/sb600spi.c
+++ b/sb600spi.c
@@ -208,7 +208,7 @@
struct pci_dev *smbus_dev;
uint32_t tmp;
uint8_t reg;
- const char *speed_names[4] = {
+ static const char *const speed_names[4] = {
"Reserved", "33", "22", "16.5"
};
diff --git a/spi25.c b/spi25.c
index fc3173f..c9e1ebf 100644
--- a/spi25.c
+++ b/spi25.c
@@ -33,7 +33,7 @@
static int spi_rdid(unsigned char *readarr, int bytes)
{
- const unsigned char cmd[JEDEC_RDID_OUTSIZE] = { JEDEC_RDID };
+ static const unsigned char cmd[JEDEC_RDID_OUTSIZE] = { JEDEC_RDID };
int ret;
int i;
@@ -95,7 +95,7 @@
int spi_write_enable(void)
{
- const unsigned char cmd[JEDEC_WREN_OUTSIZE] = { JEDEC_WREN };
+ static const unsigned char cmd[JEDEC_WREN_OUTSIZE] = { JEDEC_WREN };
int result;
/* Send WREN (Write Enable) */
@@ -109,7 +109,7 @@
int spi_write_disable(void)
{
- const unsigned char cmd[JEDEC_WRDI_OUTSIZE] = { JEDEC_WRDI };
+ static const unsigned char cmd[JEDEC_WRDI_OUTSIZE] = { JEDEC_WRDI };
/* Send WRDI (Write Disable) */
return spi_send_command(sizeof(cmd), 0, cmd, NULL);
@@ -232,10 +232,10 @@
int probe_spi_res1(struct flashchip *flash)
{
+ static const unsigned char allff[] = {0xff, 0xff, 0xff};
+ static const unsigned char all00[] = {0x00, 0x00, 0x00};
unsigned char readarr[3];
uint32_t id2;
- const unsigned char allff[] = {0xff, 0xff, 0xff};
- const unsigned char all00[] = {0x00, 0x00, 0x00};
/* We only want one-byte RES if RDID and REMS are unusable. */
@@ -298,7 +298,7 @@
uint8_t spi_read_status_register(void)
{
- const unsigned char cmd[JEDEC_RDSR_OUTSIZE] = { JEDEC_RDSR };
+ static const unsigned char cmd[JEDEC_RDSR_OUTSIZE] = { JEDEC_RDSR };
/* FIXME: No workarounds for driver/hardware bugs in generic code. */
unsigned char readarr[2]; /* JEDEC_RDSR_INSIZE=1 but wbsio needs 2 */
int ret;
@@ -486,7 +486,7 @@
*/
void spi_prettyprint_status_register_sst25vf016(uint8_t status)
{
- const char *bpt[] = {
+ static const char *const bpt[] = {
"none",
"1F0000H-1FFFFFH",
"1E0000H-1FFFFFH",
@@ -502,7 +502,7 @@
void spi_prettyprint_status_register_sst25vf040b(uint8_t status)
{
- const char *bpt[] = {
+ static const char *const bpt[] = {
"none",
"0x70000-0x7ffff",
"0x60000-0x7ffff",
@@ -837,7 +837,7 @@
int spi_write_status_enable(void)
{
- const unsigned char cmd[JEDEC_EWSR_OUTSIZE] = { JEDEC_EWSR };
+ static const unsigned char cmd[JEDEC_EWSR_OUTSIZE] = { JEDEC_EWSR };
int result;
/* Send EWSR (Enable Write Status Register). */
diff --git a/stm50flw0x0x.c b/stm50flw0x0x.c
index 80f518e..60e5c45 100644
--- a/stm50flw0x0x.c
+++ b/stm50flw0x0x.c
@@ -39,7 +39,7 @@
static int unlock_block_stm50flw0x0x(struct flashchip *flash, int offset)
{
chipaddr wrprotect = flash->virtual_registers + 2;
- const uint8_t unlock_sector = 0x00;
+ static const uint8_t unlock_sector = 0x00;
int j;
/*