avr
/
sha-2
2
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Implemented workaround for ld issue with large BSS 

The large arrays are now allocated on heap instead of in BSS. This
actually feels like a pretty stupid linker limitation, and the
workaround leads to code that is less readable. But it only impacts
the test program.

The issue was reported with GCC 7.3.0 and compiling for 64-bit arch on
MSYS2's MinGW compiler. GCC 7.3.0 for 64-bit on Linux (my own machine
and Travis) seems perfectly OK with a large BSS segment (around 3 GB
is what the test program uses for test data).

Reported issue:

$ make
cc -Wall -Wextra -Wpedantic   -c -o test.o test.c
cc -Wall -Wextra -Wpedantic   -c -o sha-256.o sha-256.c
cc   test.o sha-256.o   -o test
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/crt2.o: in function `__tmainCRTStartup':
C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:251:(.text+0x1cd): relocation truncated to fit: R_X86_64_PC32 against symbol `__imp_Sleep' defined in .idata$5 section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libkernel32.a(dkhchs01360.o)
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:278:(.text+0x255): relocation truncated to fit: R_X86_64_PC32 against symbol `__imp_SetUnhandledExceptionFilter' defined in .idata$5 section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libkernel32.a(dkhchs01346.o)
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:286:(.text+0x283): relocation truncated to fit: R_X86_64_PC32 against symbol `__mingw_winmain_hInstance' defined in COMMON section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/crt2.o
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:312:(.text+0x2f3): relocation truncated to fit: R_X86_64_PC32 against symbol `__mingw_winmain_lpCmdLine' defined in COMMON section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/crt2.o
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crtexe.c:238:(.text+0x475): relocation truncated to fit: R_X86_64_PC32 against symbol `__imp_GetStartupInfoA' defined in .idata$5 section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libkernel32.a(dkhchs00721.o)
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-gccmain.o): in function `__main':
C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/gccmain.c:74:(.text+0xb2): relocation truncated to fit: R_X86_64_PC32 against `.bss'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/gccmain.c:76:(.text+0xc2): relocation truncated to fit: R_X86_64_PC32 against `.bss'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-charmax.o): in function `my_lconv_init':
C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/charmax.c:19:(.text+0x3): relocation truncated to fit: R_X86_64_PC32 against symbol `__imp___lconv_init' defined in .idata$5 section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libmsvcrt.a(dkxcbs00090.o)
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-gs_support.o): in function `__security_init_cookie':
C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/gs_support.c:62:(.text+0x47): relocation truncated to fit: R_X86_64_PC32 against symbol `__imp_GetSystemTimeAsFileTime' defined in .idata$5 section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libkernel32.a(dkhchs00746.o)
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/gs_support.c:70:(.text+0x52): relocation truncated to fit: R_X86_64_PC32 against symbol `__imp_GetCurrentProcessId' defined in .idata$5 section in C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/lib/../lib/libkernel32.a(dkhchs00536.o)
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/repo/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/gs_support.c:71:(.text+0x5b): additional relocation overflows omitted from the output
collect2.exe: error: ld returned 1 exit status
make: *** [<builtin>: test] Error 1```
This commit is contained in:
Alain Mosnier 2018-07-28 19:16:41 +02:00
parent 23b53726f3
commit 9583456b32
1 changed files with 56 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
test.c
View File

@ -1,6 +1,7 @@
#include <stdint.h> #include <stdint.h>
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <stdlib.h>
#include "sha-256.h" #include "sha-256.h"
@ -49,37 +50,21 @@ static uint8_t data7[1000];
static uint8_t data8[1000]; static uint8_t data8[1000];
static uint8_t data9[1005]; static uint8_t data9[1005];
#if LARGE_MESSAGES #if LARGE_MESSAGES
static uint8_t data11[536870912]; #define SIZEOF_DATA11 536870912
static uint8_t data12[1090519040]; #define SIZEOF_DATA12 1090519040
static uint8_t data13[1610612798]; #define SIZEOF_DATA13 1610612798
static uint8_t * data11;
static uint8_t * data12;
static uint8_t * data13;
#endif #endif
static void construct_binary_messages(void)
{
size_t i;
for (i = 0; i < sizeof data7; i++)
data7[i] = 0;
for (i = 0; i < sizeof data8; i++)
data8[i] = 0x41;
for (i = 0; i < sizeof data9; i++)
data9[i] = 0x55;
#if LARGE_MESSAGES
for (i = 0; i < sizeof data11; i++)
data11[i] = 0x5a;
for (i = 0; i < sizeof data12; i++)
data12[i] = 0;
for (i = 0; i < sizeof data13; i++)
data13[i] = 0x42;
#endif
}
struct vector { struct vector {
const uint8_t *input; const uint8_t *input;
size_t input_len; size_t input_len;
const char *output; const char *output;
}; };
static const struct vector VECTORS[] = { static struct vector vectors[] = {
{ {
data1, data1,
sizeof data1, sizeof data1,
@ -128,28 +113,63 @@ static const struct vector VECTORS[] = {
#if LARGE_MESSAGES #if LARGE_MESSAGES
, ,
{ {
data12, NULL,
1000000, 1000000,
"d29751f2649b32ff572b5e0a9f541ea660a50f94ff0beedfb0b692b924cc8025" "d29751f2649b32ff572b5e0a9f541ea660a50f94ff0beedfb0b692b924cc8025"
}, },
{ {
data11, NULL,
sizeof data11, SIZEOF_DATA11,
"15a1868c12cc53951e182344277447cd0979536badcc512ad24c67e9b2d4f3dd" "15a1868c12cc53951e182344277447cd0979536badcc512ad24c67e9b2d4f3dd"
}, },
{ {
data12, NULL,
sizeof data12, SIZEOF_DATA12,
"461c19a93bd4344f9215f5ec64357090342bc66b15a148317d276e31cbc20b53" "461c19a93bd4344f9215f5ec64357090342bc66b15a148317d276e31cbc20b53"
}, },
{ {
data13, NULL,
sizeof data13, SIZEOF_DATA13,
"c23ce8a7895f4b21ec0daf37920ac0a262a220045a03eb2dfed48ef9b05aabea" "c23ce8a7895f4b21ec0daf37920ac0a262a220045a03eb2dfed48ef9b05aabea"
} }
#endif #endif
}; };
static void construct_binary_messages(void)
{
size_t i;
for (i = 0; i < sizeof data7; i++)
data7[i] = 0;
for (i = 0; i < sizeof data8; i++)
data8[i] = 0x41;
for (i = 0; i < sizeof data9; i++)
data9[i] = 0x55;
#if LARGE_MESSAGES
data11 = malloc(SIZEOF_DATA11);
data12 = malloc(SIZEOF_DATA12);
data13 = malloc(SIZEOF_DATA13);
for (i = 0; i < SIZEOF_DATA11; i++)
data11[i] = 0x5a;
for (i = 0; i < SIZEOF_DATA12; i++)
data12[i] = 0;
for (i = 0; i < SIZEOF_DATA13; i++)
data13[i] = 0x42;
vectors[9].input = data12;
vectors[10].input = data11;
vectors[11].input = data12;
vectors[12].input = data13;
#endif
}
static void destruct_binary_messages(void)
{
#if LARGE_MESSAGES
free(data11);
free(data12);
free(data13);
#endif
}
static void hash_to_string(char string[65], const uint8_t hash[32]) static void hash_to_string(char string[65], const uint8_t hash[32])
{ {
size_t i; size_t i;
@ -208,10 +228,14 @@ int main(void)
return 1; return 1;
} }
construct_binary_messages(); construct_binary_messages();
for (i = 0; i < (sizeof VECTORS / sizeof (struct vector)); i++) { for (i = 0; i < (sizeof vectors / sizeof (struct vector)); i++) {
const struct vector *vector = &VECTORS[i]; const struct vector *vector = &vectors[i];
if (test(vector->input, vector->input_len, vector->output)) if (test(vector->input, vector->input_len, vector->output))
{
destruct_binary_messages();
return 1; return 1;
}
} }
destruct_binary_messages();
return 0; return 0;
} }