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PowerPC: Add support for -msingle-pic-base

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-msingle-pic-base is a new gcc option for ppc and
it reduces the size of my u-boot with 6-8 KB.
While at it, add -fno-jump-tables too to save a
few more bytes.

-msingle-pic-base will be in gcc 4.6, however
backported patches are available at
http://bugs.gentoo.org/show_bug.cgi?id=347281

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
This commit is contained in:
Joakim Tjernlund 2010-12-06 18:35:37 +01:00 • committed by Wolfgang Denk
parent 33ee4c9233
commit 39768f7715
13 changed files with 127 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
arch/powerpc/config.mk
View file

@ -26,6 +26,8 @@ CROSS_COMPILE ?= ppc_8xx-
STANDALONE_LOAD_ADDR = 0x40000
LDFLAGS_FINAL += --gc-sections
PLATFORM_RELFLAGS += -fpic -mrelocatable -ffunction-sections -fdata-sections
PLATFORM_RELFLAGS += $(call cc-option,-msingle-pic-base,)
PLATFORM_RELFLAGS += $(call cc-option,-fno-jump-tables,)
PLATFORM_CPPFLAGS += -DCONFIG_PPC -D__powerpc__
PLATFORM_LDFLAGS += -n

11
arch/powerpc/cpu/74xx_7xx/start.S
View file

@ -274,7 +274,11 @@ in_flash:
stwu r0, -4(r1) /* stack backtraces terminate cleanly */
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* run low-level CPU init code (from Flash) */
bl cpu_init_f
sync
@ -588,6 +592,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

11
arch/powerpc/cpu/mpc512x/start.S
View file

@ -255,7 +255,11 @@ in_flash:
/*------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
lis r3, CONFIG_SYS_IMMR@h
/* run low-level CPU init code (in Flash) */
@ -486,6 +490,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

11
arch/powerpc/cpu/mpc5xx/start.S
View file

@ -174,7 +174,11 @@ in_flash:
/*----------------------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (from Flash) */
@ -363,6 +367,11 @@ relocate_code:
mr r10, r5 /* Save copy of monitor destination Address in SRAM */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

11
arch/powerpc/cpu/mpc5xxx/start.S
View file

@ -160,7 +160,11 @@ lowboot_reentry:
/*--------------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (in Flash)*/
@ -549,6 +553,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

11
arch/powerpc/cpu/mpc8220/start.S
View file

@ -129,7 +129,11 @@ _start:
/*--------------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (in Flash)*/
@ -522,6 +526,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

11
arch/powerpc/cpu/mpc824x/start.S
View file

@ -183,7 +183,11 @@ in_flash:
/*----------------------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (from Flash) */
@ -452,6 +456,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
#ifdef CONFIG_SYS_RAMBOOT
lis r4, CONFIG_SYS_SDRAM_BASE@h /* Source Address */

6
arch/powerpc/cpu/mpc8260/start.S
View file

@ -236,7 +236,11 @@ in_flash:
/*--------------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (in Flash)*/

11
arch/powerpc/cpu/mpc83xx/start.S
View file

@ -285,7 +285,11 @@ in_flash:
/*------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
lis r3, CONFIG_SYS_IMMR@h
/* run low-level CPU init code (in Flash)*/
@ -822,6 +826,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

10
arch/powerpc/cpu/mpc85xx/start.S
View file

@ -421,6 +421,11 @@ _start_cont:
stw r0,+12(r1) /* Save return addr (underflow vect) */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
bl cpu_init_early_f
/* switch back to AS = 0 */
@ -921,6 +926,11 @@ relocate_code:
mr r10,r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3,r5 /* Destination Address */
lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4,r4,CONFIG_SYS_MONITOR_BASE@l

11
arch/powerpc/cpu/mpc86xx/start.S
View file

@ -255,7 +255,11 @@ addr_trans_enabled:
stwu r0, -4(r1) /* stack backtraces terminate cleanly */
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* run low-level CPU init code (from Flash) */
bl cpu_init_f
sync
@ -620,6 +624,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

11
arch/powerpc/cpu/mpc8xx/start.S
View file

@ -188,7 +188,11 @@ in_flash:
/*----------------------------------------------------------------------*/
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (from Flash) */
@ -473,6 +477,11 @@ relocate_code:
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l

22
arch/powerpc/cpu/ppc4xx/start.S
View file

@ -262,6 +262,11 @@
bl reconfig_tlb0
#endif
GET_GOT
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
bl cpu_init_f /* run low-level CPU init code (from Flash) */
bl board_init_f
/* NOTREACHED - board_init_f() does not return */
@ -799,7 +804,11 @@ _start:
ori r0,r0, RESET_VECTOR@l
stwu r1,-8(r1) /* Save back chain and move SP */
stw r0,+12(r1) /* Save return addr (underflow vect) */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
#ifdef CONFIG_NAND_SPL
bl nand_boot_common /* will not return */
#else
@ -914,7 +923,11 @@ _start:
stwu r0, -4(r1) /* stack backtraces terminate cleanly */
GET_GOT /* initialize GOT access */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
bl board_init_f /* run first part of init code (from Flash) */
/* NOTREACHED - board_init_f() does not return */
@ -1179,6 +1192,11 @@ _start:
stw r0, +12(r1) /* Save return addr (underflow vect) */
#endif /* CONFIG_SYS_INIT_DCACHE_CS */
#if defined(__pic__) && __pic__ == 1
/* Needed for upcoming -msingle-pic-base */
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr r30
#endif
#ifdef CONFIG_NAND_SPL
bl nand_boot_common /* will not return */
#else