Author: krause Date: Mon Jan 17 08:50:42 2011 New Revision: 1252 URL: http://flashrom.org/trac/flashrom/changeset/1252
Log: 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).
Signed-off-by: Mathias Krause mathias.krause@secunet.com Acked-by: Stefan Reinauer stepan@coreboot.org
Modified: trunk/cli_classic.c trunk/flash.h trunk/flashrom.c trunk/ichspi.c trunk/print_wiki.c trunk/sb600spi.c trunk/spi25.c trunk/stm50flw0x0x.c
Modified: trunk/cli_classic.c ============================================================================== --- trunk/cli_classic.c Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/cli_classic.c Mon Jan 17 08:50:42 2011 (r1252) @@ -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'},
Modified: trunk/flash.h ============================================================================== --- trunk/flash.h Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/flash.h Mon Jan 17 08:50:42 2011 (r1252) @@ -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);
Modified: trunk/flashrom.c ============================================================================== --- trunk/flashrom.c Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/flashrom.c Mon Jan 17 08:50:42 2011 (r1252) @@ -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;
Modified: trunk/ichspi.c ============================================================================== --- trunk/ichspi.c Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/ichspi.c Mon Jan 17 08:50:42 2011 (r1252) @@ -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" };
Modified: trunk/print_wiki.c ============================================================================== --- trunk/print_wiki.c Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/print_wiki.c Mon Jan 17 08:50:42 2011 (r1252) @@ -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"); }
Modified: trunk/sb600spi.c ============================================================================== --- trunk/sb600spi.c Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/sb600spi.c Mon Jan 17 08:50:42 2011 (r1252) @@ -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" };
Modified: trunk/spi25.c ============================================================================== --- trunk/spi25.c Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/spi25.c Mon Jan 17 08:50:42 2011 (r1252) @@ -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). */
Modified: trunk/stm50flw0x0x.c ============================================================================== --- trunk/stm50flw0x0x.c Mon Jan 17 08:45:54 2011 (r1251) +++ trunk/stm50flw0x0x.c Mon Jan 17 08:50:42 2011 (r1252) @@ -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;
/*
-
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