Hello,
it seems that the -mcmodel=small was not the right default for RTEMS
applications, since I get
relocation truncated to fit: R_PPC64_TOC16_DS against `.got'+118
errors quite quickly.
So, I try to add the -mcmodel option. However, some piece is missing:
/build/git-build/b-gcc-git-powerpc-rtems4.12/./gcc/xgcc
-B/build/git-build/b-gcc-git-powerpc-rtems4.12/./gcc/ -nostdinc
-B/build/git-build/b-gcc-git-powerpc-rtems4.12/powerpc-rtems4.12/me6500/m64/newlib/
-isystem
/build/git-build/b-gcc-git-powerpc-rtems4.12/powerpc-rtems4.12/me6500/m64/newlib/targ-include
-isystem /home/EB/sebastian_h/archive/gcc-git/newlib/libc/include
-B/opt/rtems-4.12/powerpc-rtems4.12/bin/
-B/opt/rtems-4.12/powerpc-rtems4.12/lib/ -isystem
/opt/rtems-4.12/powerpc-rtems4.12/include -isystem
/opt/rtems-4.12/powerpc-rtems4.12/sys-include -mcpu=e6500 -m64 -g -O2
-O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -isystem ./include -I. -I.
-I../../../.././gcc -I/home/EB/sebastian_h/archive/gcc-git/libgcc
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/.
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/../gcc
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/../include -g0
-finhibit-size-directive -fno-inline -fno-exceptions
-fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize
-fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -I. -I.
-I../../../.././gcc -I/home/EB/sebastian_h/archive/gcc-git/libgcc
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/.
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/../gcc
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/../include -o crtbeginS.o
-MT crtbeginS.o -MD -MP -MF crtbeginS.dep -msdata=none -O2 -c
/home/EB/sebastian_h/archive/gcc-git/libgcc/crtstuff.c -DCRT_BEGIN
-DCRTSTUFFS_O -fPIC -mcmodel=medium -save-temps
crtstuff.s: Assembler messages:
crtstuff.s:44: Error: can't resolve `.tm_clone_table' {.tm_clone_table
section} - `.LCTOC1' {.toc1 section}
crtstuff.s:45: Error: can't resolve `__TMC_END__' {*UND* section} -
`.LCTOC1' {.toc1 section}
crtstuff.s:82: Error: can't resolve `.tm_clone_table' {.tm_clone_table
section} - `.LCTOC1' {.toc1 section}
crtstuff.s:83: Error: can't resolve `__TMC_END__' {*UND* section} -
`.LCTOC1' {.toc1 section}
crtstuff.s:131: Error: can't resolve `.bss' {.bss section} - `.LCTOC1'
{.toc1 section}
crtstuff.s:143: Error: can't resolve `__dso_handle' {.sdata section} -
`.LCTOC1' {.toc1 section}
crtstuff.s:149: Error: can't resolve `__DTOR_END__' {*UND* section} -
`.LCTOC1' {.toc1 section}
crtstuff.s:150: Error: can't resolve `.dtors' {.dtors section} -
`.LCTOC1' {.toc1 section}
crtstuff.s:153: Error: can't resolve `.bss' {.bss section} - `.LCTOC1'
{.toc1 section}
crtstuff.s:157: Error: can't resolve `.dtors' {.dtors section} -
`.LCTOC1' {.toc1 section}
crtstuff.s:162: Error: can't resolve `.bss' {.bss section} - `.LCTOC1'
{.toc1 section}
crtstuff.s:185: Error: can't resolve `.eh_frame' {.eh_frame section} -
`.LCTOC1' {.toc1 section}
crtstuff.s:192: Error: can't resolve `.bss' {.bss section} - `.LCTOC1'
{.toc1 section}
crtstuff.s:226: Error: can't resolve `.bss' {.bss section} - `.LCTOC1'
{.toc1 section}
crtstuff.s:227: Error: can't resolve `.eh_frame' {.eh_frame section} -
`.LCTOC1' {.toc1 section}
The code generation works with -mcmodel=small and -mcmodel=large.
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.hu...@embedded-brains.de
PGP : Public key available on request.
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>From 7d2b18f303cc7cf62d29328b362e645027884270 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.hu...@embedded-brains.de>
Date: Fri, 11 Aug 2017 11:26:19 +0200
Subject: [PATCH] PowerPC/RTEMS: Enable -mcmodel option
---
gcc/config.gcc | 2 +-
gcc/config/rs6000/rtems.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+), 1 deletion(-)
diff --git a/gcc/config.gcc b/gcc/config.gcc
index a9196cd26d9..593631849bb 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -2416,7 +2416,7 @@ powerpc-*-eabi*)
;;
powerpc-*-rtems*)
tm_file="rs6000/biarch64.h ${tm_file} dbxelf.h elfos.h freebsd-spec.h newlib-stdint.h rs6000/sysv4.h rs6000/e500.h rs6000/rtems.h rtems.h"
- extra_options="${extra_options} rs6000/sysv4.opt"
+ extra_options="${extra_options} rs6000/sysv4.opt rs6000/linux64.opt"
tmake_file="${tmake_file} rs6000/t-fprules rs6000/t-rtems rs6000/t-ppccomm"
;;
powerpc*-*-linux*)
diff --git a/gcc/config/rs6000/rtems.h b/gcc/config/rs6000/rtems.h
index 8a62fdcbaf3..40940c1dfe6 100644
--- a/gcc/config/rs6000/rtems.h
+++ b/gcc/config/rs6000/rtems.h
@@ -37,6 +37,11 @@
#undef TARGET_AIX
#define TARGET_AIX TARGET_64BIT
+/* Copy and paste from linux64.h and freebsd64.h */
+#undef TARGET_CMODEL
+#define TARGET_CMODEL rs6000_current_cmodel
+#define SET_CMODEL(opt) rs6000_current_cmodel = opt
+
#undef TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS() \
do \
@@ -95,6 +100,24 @@
rs6000_isa_flags |= OPTION_MASK_POWERPC64; \
error ("-m64 requires a PowerPC64 cpu"); \
} \
+ if ((rs6000_isa_flags_explicit \
+ & OPTION_MASK_MINIMAL_TOC) != 0) \
+ { \
+ if (global_options_set.x_rs6000_current_cmodel \
+ && rs6000_current_cmodel != CMODEL_SMALL) \
+ error ("-mcmodel incompatible with other toc options"); \
+ SET_CMODEL (CMODEL_SMALL); \
+ } \
+ else \
+ { \
+ if (!global_options_set.x_rs6000_current_cmodel) \
+ SET_CMODEL (CMODEL_MEDIUM); \
+ if (rs6000_current_cmodel != CMODEL_SMALL) \
+ { \
+ TARGET_NO_FP_IN_TOC = 0; \
+ TARGET_NO_SUM_IN_TOC = 0; \
+ } \
+ } \
} \
} \
while (0)
@@ -141,6 +164,30 @@
#define RESTORE_FP_SUFFIX ""
/* Copy and paste from linux64.h and freebsd64.h */
+#undef ASM_PREFERRED_EH_DATA_FORMAT
+#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
+ (TARGET_64BIT || flag_pic \
+ ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
+ | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
+ : DW_EH_PE_absptr)
+
+/* Copy and paste from linux64.h and freebsd64.h */
+#undef TOC_SECTION_ASM_OP
+#define TOC_SECTION_ASM_OP \
+ (TARGET_64BIT \
+ ? "\t.section\t\".toc\",\"aw\"" \
+ : "\t.section\t\".got\",\"aw\"")
+
+/* Copy and paste from linux64.h and freebsd64.h */
+#undef MINIMAL_TOC_SECTION_ASM_OP
+#define MINIMAL_TOC_SECTION_ASM_OP \
+ (TARGET_64BIT \
+ ? "\t.section\t\".toc1\",\"aw\"" \
+ : (flag_pic \
+ ? "\t.section\t\".got2\",\"aw\"" \
+ : "\t.section\t\".got1\",\"aw\""))
+
+/* Copy and paste from linux64.h and freebsd64.h */
#undef ASM_DECLARE_FUNCTION_SIZE
#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
do \
--
2.12.3
.file "crtstuff.c"
.abiversion 2
.section .ctors,"aw",@progbits
.align 3
.type __CTOR_LIST__, @object
__CTOR_LIST__:
.quad -1
.section .dtors,"aw",@progbits
.align 3
.type __DTOR_LIST__, @object
__DTOR_LIST__:
.quad -1
.section .eh_frame,"a",@progbits
.align 2
.type __EH_FRAME_BEGIN__, @object
__EH_FRAME_BEGIN__:
.section .tm_clone_table,"aw",@progbits
.align 3
.type __TMC_LIST__, @object
__TMC_LIST__:
.section ".toc","aw"
.align 3
.LCTOC0:
.tc .LCTOC1[TC],.LCTOC1
.section ".toc1","aw"
.align 3
.LCTOC1 = .+32768
.LC0:
.quad _ITM_deregisterTMCloneTable
.section ".text"
.align 2
.p2align 4,,15
.type deregister_tm_clones, @function
deregister_tm_clones:
.LCF0:
0: addis 2,12,.TOC.-.LCF0@ha
addi 2,2,.TOC.-.LCF0@l
.localentry deregister_tm_clones,.-deregister_tm_clones
std 30,-16(1)
ld 30,.LCTOC0@toc(2)
stdu 1,-48(1)
addis 3,30,__TMC_LIST__@toc@ha
addis 9,30,__TMC_END__@toc@ha
addi 3,3,__TMC_LIST__-.LCTOC1@l
addi 9,9,__TMC_END__-.LCTOC1@l
cmpd 7,9,3
beq- 7,.L1
addis 9,30,.LC0@toc@ha
ld 9,.LC0-.LCTOC1@l(9)
cmpdi 7,9,0
beq- 7,.L1
mflr 0
std 2,24(1)
std 0,64(1)
mr 12,9
mtctr 9
bctrl
ld 2,24(1)
ld 0,64(1)
mtlr 0
.L1:
addi 1,1,48
ld 30,-16(1)
blr
.section ".toc1","aw"
.LC1:
.quad _ITM_registerTMCloneTable
.section ".text"
.align 2
.p2align 4,,15
.type register_tm_clones, @function
register_tm_clones:
.LCF1:
0: addis 2,12,.TOC.-.LCF1@ha
addi 2,2,.TOC.-.LCF1@l
.localentry register_tm_clones,.-register_tm_clones
std 30,-16(1)
ld 30,.LCTOC0@toc(2)
stdu 1,-48(1)
addis 3,30,__TMC_LIST__@toc@ha
addis 4,30,__TMC_END__@toc@ha
addi 3,3,__TMC_LIST__-.LCTOC1@l
addi 4,4,__TMC_END__-.LCTOC1@l
subf 4,3,4
sradi 4,4,3
sradi 4,4,1
addze. 4,4
beq- 0,.L8
addis 9,30,.LC1@toc@ha
ld 9,.LC1-.LCTOC1@l(9)
cmpdi 7,9,0
beq- 7,.L8
mflr 0
std 2,24(1)
std 0,64(1)
mr 12,9
mtctr 9
bctrl
ld 2,24(1)
ld 0,64(1)
mtlr 0
.L8:
addi 1,1,48
ld 30,-16(1)
blr
.hidden __dso_handle
.globl __dso_handle
.section .sdata,"aw",@progbits
.align 3
.type __dso_handle, @object
__dso_handle:
.quad __dso_handle
.section ".toc1","aw"
.LC2:
.quad __cxa_finalize
.LC3:
.quad __deregister_frame_info
.section ".text"
.align 2
.p2align 4,,15
.type __do_global_dtors_aux, @function
__do_global_dtors_aux:
.LCF2:
0: addis 2,12,.TOC.-.LCF2@ha
addi 2,2,.TOC.-.LCF2@l
.localentry __do_global_dtors_aux,.-__do_global_dtors_aux
std 30,-16(1)
ld 30,.LCTOC0@toc(2)
stdu 1,-64(1)
addis 9,30,completed.6203@toc@ha
lbz 9,completed.6203-.LCTOC1@l(9)
cmpwi 7,9,0
bne- 7,.L17
addis 9,30,.LC2@toc@ha
mflr 0
ld 9,.LC2-.LCTOC1@l(9)
std 0,80(1)
std 28,32(1)
cmpdi 7,9,0
std 31,56(1)
beq- 7,.L19
addis 9,30,__dso_handle@toc@ha
ld 3,__dso_handle-.LCTOC1@l(9)
bl __cxa_finalize
nop
.L19:
addis 9,30,__DTOR_END__@toc@ha
addis 31,30,__DTOR_LIST__@toc@ha
addi 9,9,__DTOR_END__-.LCTOC1@l
addi 31,31,__DTOR_LIST__-.LCTOC1@l
subf 31,31,9
addis 9,30,dtor_idx.6205@toc@ha
ld 9,dtor_idx.6205-.LCTOC1@l(9)
sradi 31,31,3
addi 31,31,-1
addis 28,30,__DTOR_LIST__@toc@ha
addi 28,28,__DTOR_LIST__-.LCTOC1@l
cmpld 7,9,31
bge- 7,.L20
std 29,40(1)
addis 29,30,dtor_idx.6205@toc@ha
addi 29,29,dtor_idx.6205-.LCTOC1@l
.p2align 4,,15
.L21:
addi 9,9,1
sldi 10,9,3
std 9,0(29)
ldx 9,28,10
std 2,24(1)
mr 12,9
mtctr 9
bctrl
ld 2,24(1)
ld 9,0(29)
cmpld 7,9,31
blt+ 7,.L21
ld 29,40(1)
.L20:
bl deregister_tm_clones
addis 9,30,.LC3@toc@ha
ld 9,.LC3-.LCTOC1@l(9)
cmpdi 7,9,0
beq- 7,.L22
addis 3,30,__EH_FRAME_BEGIN__@toc@ha
addi 3,3,__EH_FRAME_BEGIN__-.LCTOC1@l
bl __deregister_frame_info
nop
.L22:
li 9,1
addis 10,30,completed.6203@toc@ha
ld 0,80(1)
stb 9,completed.6203-.LCTOC1@l(10)
ld 28,32(1)
ld 31,56(1)
mtlr 0
.L17:
addi 1,1,64
ld 30,-16(1)
blr
.section ".fini","ax"
bl __do_global_dtors_aux
nop
.previous
.section ".toc1","aw"
.LC4:
.quad __register_frame_info
.section ".text"
.align 2
.p2align 4,,15
.type frame_dummy, @function
frame_dummy:
.LCF3:
0: addis 2,12,.TOC.-.LCF3@ha
addi 2,2,.TOC.-.LCF3@l
.localentry frame_dummy,.-frame_dummy
std 30,-16(1)
ld 30,.LCTOC0@toc(2)
stdu 1,-48(1)
addis 9,30,.LC4@toc@ha
ld 9,.LC4-.LCTOC1@l(9)
cmpdi 7,9,0
beq- 7,.L32
addis 4,30,object.6215@toc@ha
addis 3,30,__EH_FRAME_BEGIN__@toc@ha
mflr 0
addi 4,4,object.6215-.LCTOC1@l
addi 3,3,__EH_FRAME_BEGIN__-.LCTOC1@l
std 0,64(1)
bl __register_frame_info
nop
ld 0,64(1)
mtlr 0
.L32:
addi 1,1,48
ld 30,-16(1)
b register_tm_clones
.section ".init","ax"
bl frame_dummy
nop
.previous
.lcomm completed.6203,1,1
.type completed.6203, @object
.lcomm dtor_idx.6205,8,8
.type dtor_idx.6205, @object
.lcomm object.6215,48,8
.type object.6215, @object
.weak __register_frame_info
.weak __deregister_frame_info
.weak __cxa_finalize
.weak _ITM_registerTMCloneTable
.weak _ITM_deregisterTMCloneTable
.hidden __DTOR_END__
.hidden __TMC_END__
.ident "GCC: (GNU) 7.1.1 20170810 [gcc-7-branch revision e363899ddbf:1a4de6af07d:e943bd58a59a930f8708f844e1e352629a4a20f7]"
.section .note.GNU-stack,"",@progbits
