[PATCH] Use .init_array, .fini_array sections for ARM EABI (broke -target=avr)
Paul Schlie
schlie@comcast.net
Sat Apr 30 21:05:00 GMT 2005
> From: "Joseph S. Myers" <joseph@codesourcery.com>
>> On Sat, 30 Apr 2005, Daniel Jacobowitz wrote:
>>> The definition/use of __main is now dependant on INIT_ARRAY_SECTION_ASM_OP
>>> HAS_INIT_SECTION , and .init_array, resulting in __main not being defined as
>>> presumed by the avr when linking; and may possibly affect other things but
>>> haven't gotten that far yet.
>>>
>>> (a fix may be as simple as defining HAS_INIT_SECTION in libgcc2.c
>>> regardless of INIT_ARRAY_SECTION_ASM_OP, but not really sure?)
>>
>> You're going to have to provide more details, since I can't see how the
>> patch could cause the problem you're describing.
>>
>> Error messages, preprocessed source, and all the other sorts of details
>> that a bug report normally requires, please.
>
> Bootstrap on hppa2.0w-hpux fails today with:
>
> stage1/xgcc -Bstage1/
> -B/scratch/gcc/nightly-2005-04-30-mainline/hppa2.0w-hp-hpux11.11/build_gcc/ins
> tall/hppa2.0w-hp-hpux11.11/bin/
> -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes
> -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros
> -Wold-style-definition -Werror -fno-common -DHAVE_CONFIG_H
> -DGENERATOR_FILE -o build/genmodes \
> build/genmodes.o build/errors.o
> ../build-hppa2.0w-hp-hpux11.11/libiberty/libiberty.a
> /usr/ccs/bin/ld: Unsatisfied symbols:
> __main (first referenced in build/genmodes.o) (code)
> collect2: ld returned 1 exit status
> make[2]: *** [build/genmodes] Error 1
>
> This may or may not relate to the quoted garbled description of symptoms
> on avr; I haven't yet investigated it further.
Yup, that was much clearer than stating that __main was not being defined as
expected when linking (so if preferred):
Linking: main.elf
avr-gcc -mmcu=atmega64 -I. -g -Os -funsigned-char -funsigned-bitfields
-fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=main.o
-fdump-tree-all -da -I/usr/local/avr/include -std=gnu99
-funsafe-math-optimizations -Wp,-M,-MP,-MT,main.o,-MF,.dep/main.elf.d main.o
--output main.elf -Wl,-Map=main.map,--cref -lm
main.o: In function `main':
/Applications/avr/tests/test/main.c:18: undefined reference to `__main'
make: *** [main.elf] Error 1
---
main.lst:
1 .file "main.c"
2 .arch atmega64
3 __SREG__ = 0x3f
4 __SP_H__ = 0x3e
5 __SP_L__ = 0x3d
6 __tmp_reg__ = 0
7 __zero_reg__ = 1
8 .global __do_copy_data
9 .global __do_clear_bss
12 .text
13 .Ltext0:
30 .data
31 .LC0:
32 0000 6162 6364 .string "abcde"
32 6500
33 .text
35 .global foo
37 foo:
38 .stabd 46,0,0
1:main.c **** volatile char v;
2:main.c ****
3:main.c **** void foo ( void )
4:main.c **** {
40 .LM0:
41 /* prologue: frame size=5 */
42 0000 CF93 push r28
43 0002 DF93 push r29
44 0004 CDB7 in r28,__SP_L__
45 0006 DEB7 in r29,__SP_H__
46 0008 2597 sbiw r28,5
47 000a 0FB6 in __tmp_reg__,__SREG__
48 000c F894 cli
49 000e DEBF out __SP_H__,r29
50 0010 0FBE out __SREG__,__tmp_reg__
51 0012 CDBF out __SP_L__,r28
52 /* prologue end (size=10) */
5:main.c **** char x[5] = {"abcde"};
54 .LM1:
55 0014 DE01 movw r26,r28
56 0016 1196 adiw r26,1
57 0018 E0E0 ldi r30,lo8(.LC0)
58 001a F0E0 ldi r31,hi8(.LC0)
59 001c 85E0 ldi r24,lo8(5)
60 .L2:
62 .LM2:
63 001e 0190 ld r0,Z+
64 0020 0D92 st X+,r0
65 0022 8150 subi r24,lo8(-(-1))
66 0024 E1F7 brne .L2
6:main.c ****
7:main.c **** v = x[v];
68 .LM3:
69 0026 8091 0000 lds r24,v
70 002a FE01 movw r30,r28
71 002c E80F add r30,r24
72 002e F11D adc r31,__zero_reg__
73 0030 8181 ldd r24,Z+1
74 0032 8093 0000 sts v,r24
75 /* epilogue: frame size=5 */
76 0036 2596 adiw r28,5
77 0038 0FB6 in __tmp_reg__,__SREG__
78 003a F894 cli
79 003c DEBF out __SP_H__,r29
80 003e 0FBE out __SREG__,__tmp_reg__
81 0040 CDBF out __SP_L__,r28
82 0042 DF91 pop r29
83 0044 CF91 pop r28
84 0046 0895 ret
85 /* epilogue end (size=9) */
86 /* function foo size 37 (18) */
91 .Lscope0:
93 .stabd 78,0,0
94 .data
97 C.1.1222:
98 0006 61 .byte 97
99 0007 62 .byte 98
100 0008 63 .byte 99
101 0009 64 .byte 100
102 000a 65 .byte 101
103 .text
105 .global bar
107 bar:
108 .stabd 46,0,0
8:main.c **** }
9:main.c ****
10:main.c **** void bar ( void )
11:main.c **** {
110 .LM4:
111 /* prologue: frame size=5 */
112 0048 CF93 push r28
113 004a DF93 push r29
114 004c CDB7 in r28,__SP_L__
115 004e DEB7 in r29,__SP_H__
116 0050 2597 sbiw r28,5
117 0052 0FB6 in __tmp_reg__,__SREG__
118 0054 F894 cli
119 0056 DEBF out __SP_H__,r29
120 0058 0FBE out __SREG__,__tmp_reg__
121 005a CDBF out __SP_L__,r28
122 /* prologue end (size=10) */
12:main.c **** char y[5] = {'a','b','c','d','e'};
124 .LM5:
125 005c DE01 movw r26,r28
126 005e 1196 adiw r26,1
127 0060 E0E0 ldi r30,lo8(C.1.1222)
128 0062 F0E0 ldi r31,hi8(C.1.1222)
129 0064 85E0 ldi r24,lo8(5)
130 .L7:
132 .LM6:
133 0066 0490 lpm r0,Z
134 0068 0D92 st X+,r0
135 006a 8150 subi r24,lo8(-(-1))
136 006c E1F7 brne .L7
13:main.c ****
14:main.c **** v = y[v];
138 .LM7:
139 006e 8091 0000 lds r24,v
140 0072 FE01 movw r30,r28
141 0074 E80F add r30,r24
142 0076 F11D adc r31,__zero_reg__
143 0078 8181 ldd r24,Z+1
144 007a 8093 0000 sts v,r24
145 /* epilogue: frame size=5 */
146 007e 2596 adiw r28,5
147 0080 0FB6 in __tmp_reg__,__SREG__
148 0082 F894 cli
149 0084 DEBF out __SP_H__,r29
150 0086 0FBE out __SREG__,__tmp_reg__
151 0088 CDBF out __SP_L__,r28
152 008a DF91 pop r29
153 008c CF91 pop r28
154 008e 0895 ret
155 /* epilogue end (size=9) */
156 /* function bar size 37 (18) */
161 .Lscope1:
163 .stabd 78,0,0
164 .data
167 C.3.1233:
168 000b 61 .byte 97
169 000c 62 .byte 98
170 000d 63 .byte 99
171 000e 64 .byte 100
172 000f 65 .byte 101
173 .text
175 .global main
177 main:
178 .stabd 46,0,0
15:main.c **** }
16:main.c ****
17:main.c **** int main ( void )
18:main.c **** {
180 .LM8:
181 /* prologue: frame size=17 */
182 0090 C0E0 ldi r28,lo8(__stack - 17)
183 0092 D0E0 ldi r29,hi8(__stack - 17)
184 0094 DEBF out __SP_H__,r29
185 0096 CDBF out __SP_L__,r28
186 /* prologue end (size=4) */
187 0098 0E94 0000 call __main
19:main.c **** char x[5] = {"abcde"}; // Initializer string not
marked READONLY static const.
189 .LM9:
190 009c DE01 movw r26,r28
191 009e 1396 adiw r26,3
192 00a0 E0E0 ldi r30,lo8(.LC0)
193 00a2 F0E0 ldi r31,hi8(.LC0)
194 00a4 85E0 ldi r24,lo8(5)
195 .L12:
197 .LM10:
198 00a6 0190 ld r0,Z+
199 00a8 0D92 st X+,r0
200 00aa 8150 subi r24,lo8(-(-1))
201 00ac E1F7 brne .L12
20:main.c ****
21:main.c **** char y[5] = {'a','b','c','d','e'}; // Although
char arrary is correctly.
203 .LM11:
204 00ae DE01 movw r26,r28
205 00b0 1896 adiw r26,8
206 00b2 E0E0 ldi r30,lo8(C.3.1233)
207 00b4 F0E0 ldi r31,hi8(C.3.1233)
208 00b6 85E0 ldi r24,lo8(5)
209 .L13:
210 00b8 0490 lpm r0,Z
211 00ba 0D92 st X+,r0
212 00bc 8150 subi r24,lo8(-(-1))
213 00be E1F7 brne .L13
22:main.c ****
23:main.c **** volatile vc;
24:main.c ****
25:main.c **** long l;
26:main.c ****
27:main.c **** v = x[v];
215 .LM12:
216 00c0 8091 0000 lds r24,v
217 00c4 FE01 movw r30,r28
218 00c6 E80F add r30,r24
219 00c8 F11D adc r31,__zero_reg__
220 00ca 8381 ldd r24,Z+3
221 00cc 8093 0000 sts v,r24
28:main.c ****
29:main.c **** v = y[v];
223 .LM13:
224 00d0 8091 0000 lds r24,v
225 00d4 FE01 movw r30,r28
226 00d6 E80F add r30,r24
227 00d8 F11D adc r31,__zero_reg__
228 00da 8085 ldd r24,Z+8
229 00dc 8093 0000 sts v,r24
230 .LBB2:
231 .LBB3:
233 .LM14:
234 00e0 DE01 movw r26,r28
235 00e2 1D96 adiw r26,13
236 00e4 E0E0 ldi r30,lo8(.LC0)
237 00e6 F0E0 ldi r31,hi8(.LC0)
238 00e8 85E0 ldi r24,lo8(5)
239 .L14:
240 00ea 0190 ld r0,Z+
241 00ec 0D92 st X+,r0
242 00ee 8150 subi r24,lo8(-(-1))
243 00f0 E1F7 brne .L14
245 .LM15:
246 00f2 8091 0000 lds r24,v
247 00f6 FE01 movw r30,r28
248 00f8 E80F add r30,r24
249 00fa F11D adc r31,__zero_reg__
250 00fc 8585 ldd r24,Z+13
251 00fe 8093 0000 sts v,r24
252 .LBE3:
253 .LBE2:
30:main.c ****
31:main.c **** foo();
32:main.c ****
33:main.c **** bar();
255 .LM16:
256 0102 0E94 0000 call bar
34:main.c ****
35:main.c **** l = vc << 1;
258 .LM17:
259 0106 8981 ldd r24,Y+1
260 0108 9A81 ldd r25,Y+2
261 010a 880F lsl r24
262 010c 991F rol r25
263 010e AA27 clr r26
264 0110 97FD sbrc r25,7
265 0112 A095 com r26
266 0114 BA2F mov r27,r26
267 0116 8160 ori r24,lo8(1)
268 /* epilogue: frame size=17 */
269 0118 0C94 0000 jmp exit
270 /* epilogue end (size=2) */
271 /* function main size 73 (67) */
279 .Lscope2:
281 .stabd 78,0,0
282 .comm v,1,1
284 .Letext0:
285 /* File "main.c": code 147 = 0x0093 ( 103),
prologues 24, epilogues 20 */
DEFINED SYMBOLS
*ABS*:00000000 main.c
/var/tmp//ccziiwoR.s:3 *ABS*:0000003f __SREG__
/var/tmp//ccziiwoR.s:4 *ABS*:0000003e __SP_H__
/var/tmp//ccziiwoR.s:5 *ABS*:0000003d __SP_L__
/var/tmp//ccziiwoR.s:6 *ABS*:00000000 __tmp_reg__
/var/tmp//ccziiwoR.s:7 *ABS*:00000001 __zero_reg__
/var/tmp//ccziiwoR.s:37 .text:00000000 foo
*COM*:00000001 v
/var/tmp//ccziiwoR.s:97 .data:00000006 C.1.1222
/var/tmp//ccziiwoR.s:107 .text:00000048 bar
/var/tmp//ccziiwoR.s:167 .data:0000000b C.3.1233
/var/tmp//ccziiwoR.s:177 .text:00000090 main
UNDEFINED SYMBOLS
__do_copy_data
__do_clear_bss
__stack
__main
exit
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