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authorGabor Juhos <juhosg@openwrt.org>2013-01-30 04:56:37 +0000
committerDaniel Schwierzeck <daniel.schwierzeck@gmail.com>2013-01-30 23:32:52 +0100
commit025f2b338072781cd747bf7365cf43fcf9f40f1a (patch)
treef73c10d3ea7bd07539efb731da57c8a2031aee6f /arch/mips
parent67d80c9f97f1b73d227f64efebf204221a611a70 (diff)
MIPS: simplify relocated _G_O_T_ address calculation
The difference between the address of the original and the relocated _GLOBAL_OFFSET_TABLE_ is always the same as the relocation offset. The relocation offset is already computed and it is available in the 's1/t6' register. Use that to adjust the relocated _G_O_T_ address, instead of calculating the offset again from the _gp value. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com> Cc: Xiangfu Liu <xiangfu@openmobilefree.net>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/cpu/mips32/start.S5
-rw-r--r--arch/mips/cpu/mips64/start.S5
-rw-r--r--arch/mips/cpu/xburst/start.S5
3 files changed, 3 insertions, 12 deletions
diff --git a/arch/mips/cpu/mips32/start.S b/arch/mips/cpu/mips32/start.S
index 77f1103216..51ce914fad 100644
--- a/arch/mips/cpu/mips32/start.S
+++ b/arch/mips/cpu/mips32/start.S
@@ -314,7 +314,6 @@ relocate_code:
jr t0
nop
- .word _gp
.word _GLOBAL_OFFSET_TABLE_
.word uboot_end_data
.word uboot_end
@@ -329,9 +328,7 @@ in_ram:
*/
lw t3, -4(t0) # t3 <-- num_got_entries
lw t4, -16(t0) # t4 <-- _GLOBAL_OFFSET_TABLE_
- lw t5, -20(t0) # t5 <-- _gp
- sub t4, t5 # compute offset
- add t4, t4, gp # t4 now holds relocated _G_O_T_
+ add t4, s1 # t4 now holds relocated _G_O_T_
addi t4, t4, 8 # skipping first two entries
li t2, 2
1:
diff --git a/arch/mips/cpu/mips64/start.S b/arch/mips/cpu/mips64/start.S
index 80e6bb1398..15225945e9 100644
--- a/arch/mips/cpu/mips64/start.S
+++ b/arch/mips/cpu/mips64/start.S
@@ -193,7 +193,6 @@ relocate_code:
jr t0
nop
- .dword _gp
.dword _GLOBAL_OFFSET_TABLE_
.dword uboot_end_data
.dword uboot_end
@@ -208,9 +207,7 @@ in_ram:
*/
ld t3, -8(t0) # t3 <-- num_got_entries
ld t8, -32(t0) # t8 <-- _GLOBAL_OFFSET_TABLE_
- ld t9, -40(t0) # t9 <-- _gp
- dsub t8, t9 # compute offset
- dadd t8, t8, gp # t8 now holds relocated _G_O_T_
+ dadd t8, s1 # t8 now holds relocated _G_O_T_
daddi t8, t8, 16 # skipping first two entries
dli t2, 2
1:
diff --git a/arch/mips/cpu/xburst/start.S b/arch/mips/cpu/xburst/start.S
index 194d7452e1..9e637dfe99 100644
--- a/arch/mips/cpu/xburst/start.S
+++ b/arch/mips/cpu/xburst/start.S
@@ -122,7 +122,6 @@ relocate_code:
jr t0
nop
- .word _gp
.word _GLOBAL_OFFSET_TABLE_
.word uboot_end_data
.word uboot_end
@@ -137,9 +136,7 @@ in_ram:
*/
lw t3, -4(t0) # t3 <-- num_got_entries
lw t4, -16(t0) # t4 <-- _GLOBAL_OFFSET_TABLE_
- lw t5, -20(t0) # t5 <-- _gp
- sub t4, t5 # compute offset
- add t4, t4, gp # t4 now holds relocated _G_O_T_
+ add t4, t6 # t4 now holds relocated _G_O_T_
addi t4, t4, 8 # skipping first two entries
li t2, 2
1: