[U-Boot] [PATCH 11/12] arm: lib: Split asm symbols into different .text subsections

Marek Vasut
2016-05-26T16:01:46Z

Split each symbol in lib1funcs into different .text.foo section instead
of placing all of them into plain .text . This allows the linker to collect
and discard unused assembler symbols.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
---
arch/arm/lib/ashldi3.S | 2 ++
arch/arm/lib/ashrdi3.S | 2 ++
arch/arm/lib/div64.S | 2 ++
arch/arm/lib/lib1funcs.S | 25 +++++++++++++++++++++++++
arch/arm/lib/lshrdi3.S | 2 ++
arch/arm/lib/muldi3.S | 2 ++
arch/arm/lib/uldivmod.S | 3 +++
7 files changed, 38 insertions(+)

diff --git a/arch/arm/lib/ashldi3.S b/arch/arm/lib/ashldi3.S
index a4f5ebb..6c9ae91 100644
--- a/arch/arm/lib/ashldi3.S
+++ b/arch/arm/lib/ashldi3.S
@@ -17,6 +17,7 @@

ENTRY(__ashldi3)
ENTRY(__aeabi_llsl)
+.pushsection .text.__ashldi3, "ax"

subs r3, r2, #32
rsb ip, r2, #32
@@ -28,5 +29,6 @@ ENTRY(__aeabi_llsl)
mov al, al, lsl r2
ret lr

+.popsection
ENDPROC(__ashldi3)
ENDPROC(__aeabi_llsl)
diff --git a/arch/arm/lib/ashrdi3.S b/arch/arm/lib/ashrdi3.S
index c6e1ed3..3eb59ec 100644
--- a/arch/arm/lib/ashrdi3.S
+++ b/arch/arm/lib/ashrdi3.S
@@ -17,6 +17,7 @@

ENTRY(__ashrdi3)
ENTRY(__aeabi_lasr)
+.pushsection .text.__ashrdi3, "ax"

subs r3, r2, #32
rsb ip, r2, #32
@@ -28,5 +29,6 @@ ENTRY(__aeabi_lasr)
mov ah, ah, asr r2
ret lr

+.popsection
ENDPROC(__ashrdi3)
ENDPROC(__aeabi_lasr)
diff --git a/arch/arm/lib/div64.S b/arch/arm/lib/div64.S
index a42a0f0..5bfb41d 100644
--- a/arch/arm/lib/div64.S
+++ b/arch/arm/lib/div64.S
@@ -47,6 +47,7 @@

ENTRY(__do_div64)
UNWIND(.fnstart)
+.pushsection .text.__do_div64, "ax"

@ Test for easy paths first.
subs ip, r4, #1
@@ -192,6 +193,7 @@ UNWIND(.fnstart)
moveq yh, xh
moveq xh, #0
reteq lr
+.popsection
UNWIND(.fnend)

UNWIND(.fnstart)
diff --git a/arch/arm/lib/lib1funcs.S b/arch/arm/lib/lib1funcs.S
index 408839b..f1becda 100644
--- a/arch/arm/lib/lib1funcs.S
+++ b/arch/arm/lib/lib1funcs.S
@@ -196,6 +196,7 @@
ENTRY(__udivsi3)
ENTRY(__aeabi_uidiv)
UNWIND(.fnstart)
+.pushsection .text.__udivsi3, "ax"

subs r2, r1, #1
reteq lr
@@ -219,12 +220,14 @@ UNWIND(.fnstart)
mov r0, r0, lsr r2
ret lr

+.popsection
UNWIND(.fnend)
ENDPROC(__udivsi3)
ENDPROC(__aeabi_uidiv)

ENTRY(__umodsi3)
UNWIND(.fnstart)
+.pushsection .text.__umodsi3, "ax"

subs r2, r1, #1 @ compare divisor with 1
bcc Ldiv0
@@ -238,12 +241,14 @@ UNWIND(.fnstart)

ret lr

+.popsection
UNWIND(.fnend)
ENDPROC(__umodsi3)

ENTRY(__divsi3)
ENTRY(__aeabi_idiv)
UNWIND(.fnstart)
+.pushsection .text.__divsi3, "ax"

cmp r1, #0
eor ip, r0, r1 @ save the sign of the result.
@@ -280,12 +285,14 @@ UNWIND(.fnstart)
rsbmi r0, r0, #0
ret lr

+.popsection
UNWIND(.fnend)
ENDPROC(__divsi3)
ENDPROC(__aeabi_idiv)

ENTRY(__modsi3)
UNWIND(.fnstart)
+.pushsection .text.__modsi3, "ax"

cmp r1, #0
beq Ldiv0
@@ -305,6 +312,7 @@ UNWIND(.fnstart)
rsbmi r0, r0, #0
ret lr

+.popsection
UNWIND(.fnend)
ENDPROC(__modsi3)

@@ -313,6 +321,7 @@ ENDPROC(__modsi3)
ENTRY(__aeabi_uidivmod)
UNWIND(.fnstart)
UNWIND(.save {r0, r1, ip, lr} )
+.pushsection .text.__aeabi_uidivmod, "ax"

stmfd sp!, {r0, r1, ip, lr}
bl __aeabi_uidiv
@@ -321,12 +330,15 @@ UNWIND(.save {r0, r1, ip, lr} )
sub r1, r1, r3
ret lr

+.popsection
UNWIND(.fnend)
ENDPROC(__aeabi_uidivmod)

ENTRY(__aeabi_idivmod)
UNWIND(.fnstart)
UNWIND(.save {r0, r1, ip, lr} )
+.pushsection .text.__aeabi_uidivmod, "ax"
+
stmfd sp!, {r0, r1, ip, lr}
bl __aeabi_idiv
ldmfd sp!, {r1, r2, ip, lr}
@@ -334,6 +346,7 @@ UNWIND(.save {r0, r1, ip, lr} )
sub r1, r1, r3
ret lr

+.popsection
UNWIND(.fnend)
ENDPROC(__aeabi_idivmod)

@@ -343,16 +356,21 @@ Ldiv0:
UNWIND(.fnstart)
UNWIND(.pad #4)
UNWIND(.save {lr})
+.pushsection .text.Ldiv0, "ax"
+
str lr, [sp, #-8]!
bl __div0
mov r0, #0 @ About as wrong as it could be.
ldr pc, [sp], #8
+
+.popsection
UNWIND(.fnend)
ENDPROC(Ldiv0)

/* Thumb-1 specialities */
#if defined(CONFIG_SYS_THUMB_BUILD) && !defined(CONFIG_HAS_THUMB2)
ENTRY(__gnu_thumb1_case_sqi)
+.pushsection .text.__gnu_thumb1_case_sqi, "ax"
push {r1}
mov r1, lr
lsrs r1, r1, #1
@@ -362,9 +380,11 @@ ENTRY(__gnu_thumb1_case_sqi)
add lr, lr, r1
pop {r1}
bx lr
+.popsection
ENDPROC(__gnu_thumb1_case_sqi)

ENTRY(__gnu_thumb1_case_uqi)
+.pushsection .text.__gnu_thumb1_case_uqi, "ax"
push {r1}
mov r1, lr
lsrs r1, r1, #1
@@ -374,9 +394,11 @@ ENTRY(__gnu_thumb1_case_uqi)
add lr, lr, r1
pop {r1}
bx lr
+.popsection
ENDPROC(__gnu_thumb1_case_uqi)

ENTRY(__gnu_thumb1_case_shi)
+.pushsection .text.__gnu_thumb1_case_shi, "ax"
push {r0, r1}
mov r1, lr
lsrs r1, r1, #1
@@ -387,9 +409,11 @@ ENTRY(__gnu_thumb1_case_shi)
add lr, lr, r1
pop {r0, r1}
bx lr
+.popsection
ENDPROC(__gnu_thumb1_case_shi)

ENTRY(__gnu_thumb1_case_uhi)
+.pushsection .text.__gnu_thumb1_case_uhi, "ax"
push {r0, r1}
mov r1, lr
lsrs r1, r1, #1
@@ -400,5 +424,6 @@ ENTRY(__gnu_thumb1_case_uhi)
add lr, lr, r1
pop {r0, r1}
bx lr
+.popsection
ENDPROC(__gnu_thumb1_case_uhi)
#endif
diff --git a/arch/arm/lib/lshrdi3.S b/arch/arm/lib/lshrdi3.S
index 9c51141..f710ccb 100644
--- a/arch/arm/lib/lshrdi3.S
+++ b/arch/arm/lib/lshrdi3.S
@@ -17,6 +17,7 @@

ENTRY(__lshrdi3)
ENTRY(__aeabi_llsr)
+.pushsection .text.__lshldi3, "ax"

subs r3, r2, #32
rsb ip, r2, #32
@@ -28,5 +29,6 @@ ENTRY(__aeabi_llsr)
mov ah, ah, lsr r2
ret lr

+.popsection
ENDPROC(__lshrdi3)
ENDPROC(__aeabi_llsr)
diff --git a/arch/arm/lib/muldi3.S b/arch/arm/lib/muldi3.S
index daa5704..bc255c5 100644
--- a/arch/arm/lib/muldi3.S
+++ b/arch/arm/lib/muldi3.S
@@ -25,6 +25,7 @@

ENTRY(__muldi3)
ENTRY(__aeabi_lmul)
+.pushsection .text.__muldi3, "ax"

mul xh, yl, xh
mla xh, xl, yh, xh
@@ -42,5 +43,6 @@ ENTRY(__aeabi_lmul)
adc xh, xh, ip, lsr #16
ret lr

+.popsection
ENDPROC(__muldi3)
ENDPROC(__aeabi_lmul)
diff --git a/arch/arm/lib/uldivmod.S b/arch/arm/lib/uldivmod.S
index 2efcd73..bbc44c6 100644
--- a/arch/arm/lib/uldivmod.S
+++ b/arch/arm/lib/uldivmod.S
@@ -34,6 +34,8 @@ TMP .req r8
)

ENTRY(__aeabi_uldivmod)
+.pushsection .text.__aeabi_uldivmod, "ax"
+
stmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) lr}
@ Test if B == 0
orrs ip, B_0, B_1 @ Z set -> B == 0
@@ -240,4 +242,5 @@ L_div_by_0:
mov R_0, #0
mov R_1, #0
ldmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) pc}
+.popsection
ENDPROC(__aeabi_uldivmod)
--
2.7.0