https://sourceware.org/bugzilla/show_bug.cgi?id=32131
Bug ID: 32131
Summary: Linker should always check TLS relocation
Product: binutils
Version: 2.44 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
Target: i386, x86-64
[hjl@gnu-cfl-3 tls-3]$ vi tls-main1.c
[hjl@gnu-cfl-3 tls-3]$ make
gcc -B./ -m32 -O2 -g -mtls-dialect=gnu2 -c -o tls-main1.o tls-main1.c
gcc -B./ -m32 -o x tls-main1.o tls-gd1.o
tls-gd1.o: TLS transition from R_386_TLS_GD to R_386_TLS_IE_32 against `gd' at
0x12 in section `.text' failed
./ld: failed to set dynamic section sizes: bad value
collect2: error: ld returned 1 exit status
make: *** [Makefile:24: x] Error 1
[hjl@gnu-cfl-3 tls-3]$ make clean
rm -f *.o foo* *.so
[hjl@gnu-cfl-3 tls-3]$ ls
ld Makefile tls-def1.c tls-gd1.S tls-main1.c y
[hjl@gnu-cfl-3 tls-3]$ cat tls-gd1.S
.text
.p2align 4,,15
.globl get_gd
.type get_gd, @function
get_gd:
pushl %ebx
call __x86.get_pc_thunk.bx
addl $_GLOBAL_OFFSET_TABLE_, %ebx
subl $8, %esp
movl gd@tlsgd(,%ebx,1), %eax
call ___tls_get_addr@PLT
addl $8, %esp
popl %ebx
ret
.size get_gd, .-get_gd
.section .text,"axG",@progbits,__x86.get_pc_thunk.bx,comdat,unique,1
.globl __x86.get_pc_thunk.bx
.hidden __x86.get_pc_thunk.bx
.type __x86.get_pc_thunk.bx, @function
__x86.get_pc_thunk.bx:
movl (%esp), %ebx
ret
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-3 tls-3]$ cat tls-main1.c
extern int * get_gd (void);
__thread int gd = 4;
int
main ()
{
return get_gd () == &gd ? 0 : 1;
}
[hjl@gnu-cfl-3 tls-3]$ make y
gcc -B./ -m32 -O2 -g -c -o tls-main1.o tls-main1.c
gcc -B./ -m32 -g -shared -o libtls-gd1.so tls-gd1.S
gcc -B./ -m32 -o y tls-main1.o libtls-gd1.so -Wl,-R,.
[hjl@gnu-cfl-3 tls-3]$ ./y
Segmentation fault (core dumped)
[hjl@gnu-cfl-3 tls-3]$ make x
gcc -B./ -m32 -c -o tls-gd1.o tls-gd1.S
gcc -B./ -m32 -o x tls-main1.o tls-gd1.o
tls-gd1.o: TLS transition from R_386_TLS_GD to R_386_TLS_IE_32 against `gd' at
0x12 in section `.text' failed
./ld: failed to set dynamic section sizes: bad value
collect2: error: ld returned 1 exit status
make: *** [Makefile:24: x] Error 1
[hjl@gnu-cfl-3 tls-3]$
Linker should always issue an error for
movl gd@tlsgd(,%ebx,1), %eax
--
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