[Bug bootstrap/34189] New: Kernel hangs while booting when compiled with gcc-4.3 snapshot.
Hello all, I have successfully built SH4-Linux toolchain based on (binutils-2.17.50, gcc-4.3-20071012, glibc-2.6) for Renesas SH target I am facing problem while booting the Linux kernel on SH target. Targets Used for Testing: SH7751R2D+ and SH7780 Highlander RP I have successfully compiled Linux kernel using toolchain but kernel hangs after following message: Disk drive detected: TOSHIBA THNCF128MMG 3.10 STCB21M85008B24183C8 Set Transfer Mode result: 51 Initialize Device Parameters result: 50 IDLE result: 50 LILO boot: first-image Loading linuxdone. It is not even printing the banner of the kernel. The same kernel when compiled with gcc-4.2.1 based toolchain, it boots successfully on the target hardware Any help on this will be highly appreciated. Regards, Ashay Jaiswal KPIT Cummins Infosystems Ltd, Pune (INDIA) ~~ Free download of GNU based SH-Linux toolchains for Renesas' SHSeries. The following site also offers free technical support to its users. Visit http://www.kpitgnutools.com for details. Latest versions of KPIT GNU SH-Linux tools were released on October 19, 2007. ~~ -- Summary: Kernel hangs while booting when compiled with gcc-4.3 snapshot. Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: Ashay dot Jaiswal at kpitcummins dot com GCC build triplet: i686-pc-linux GCC host triplet: sh4-unknown-linux GCC target triplet: sh4-unknown-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34189
[Bug target/34189] Kernel hangs while booting when compiled with gcc-4.3 snapshot.
--- Comment #2 from Ashay dot Jaiswal at kpitcummins dot com 2007-11-23 05:11 --- (In reply to comment #1) We need a testcase to do anything about this. I have tested on released Linux kernel version 2.6.22.1 and kernel version 2.6.23.1 both hangs while booting, but boots successfully when cross compiled with gcc-4.2.1 based toolchain. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34189
[Bug c++/31948] New: SH- Mathematical Error handling is no working for valid code
Hello all,
I have successfully built SH4-Linux toolchain based on
(binutils-2.17, gcc-4.2-20061205, glibc-2.5) for Renesas SH target.
I am facing problem while executing the following C++ program.
--
#include stdio.h
#include cmath
#include cerrno
double value;
int main( void )
{
value = sqrt(-1.2);
if (errno != EDOM) {
printf(sqrt: GOT %f\n, value);
}
}
--
The above program compiles successfully with the sh4-linux toolchain.
While executing on target platform sqrt function is returning nan but
errno variable is not set to EDOM.
Command: sh4-linux-gcc name {here default target is m4}
Observations:
1. When the above program is compiled with -m4-nofpu target option or with
any other FPU less target option program executes successfully and the
errno variable is set to EDOM.
Command: sh4-linux-gcc -m4-nofpu name
Is there any relation with the target processor (i.e. floating point unit
processor or non - floating point unit processor)? Because the only difference
between success and failure condition in our case is the target switch we are
specifying (m4-nofpu or m4 respectively ).
Any help on this will be appreciated.
Regards,
Ashay Jaiswal
KPIT Cummins Infosystems Ltd,
Pune (INDIA)
~~
Free download of GNU based SH-Linux toolchains for Renesas' SH Series.
The following site also offers free technical support to its users.
Visit http://www.kpitgnutools.com for details.
Latest versions of KPIT GNU SH-Linux tools were released on April 5, 2007.
~
--
Summary: SH- Mathematical Error handling is no working for valid
code
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Ashay dot Jaiswal at kpitcummins dot com
GCC build triplet: i686-pc-linux
GCC host triplet: sh4-unknown-linux
GCC target triplet: sh4-unknown-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31948
[Bug c/31949] New: SH- Aliasing problem for incompatible pointers in c code
Hello all,
I have successfully built SH4-Linux toolchain based on
(binutils-2.17, gcc-4.2-20061205, glibc-2.5) for Renesas SH target.
I am facing problem while executing the following C program.
--
#include stdio.h
struct structB { int x; int y; };
struct structC { int x; int y; };
main()
{
struct structC varCs, *varCp=varCs, **varCpp=varCp;
struct structB *varBp;
varCs.x = 10;
varCs.y = 20;
varBp = *((struct structB **)varCpp);
varBp-x = varBp-y;
printf(%d,varCs.x);
}
--
The above program compiles successfully with the sh4-linux toolchain.
While executing on target platform it is generating wrong result.
Observations:
1. When the above program is compiled with '-O0' optimization the value of
varCs.x is printed as 20, which is the expected output.
Command: sh4-linux-gcc file name
2. When the above program is compiled with '-O2' optimization the program is
giving following errors:
a) Bus error when executed on SH7780 Highlander board.
b) Killing process due to unaligned access in user space when executed on
SH7751 R2D board.
Command: sh4-linux-gcc -O2 file name
3. When the above program is compiled with '-O2' and '-fno-strict-aliasing'
option the value of varCs.x is printed as 20.
Command: sh4-linux-gcc -O2 -fno-strict-aliasing file name
Is the above problem related to strict aliasing ? As with 'fno-strict-aliasing'
option the above code works fine.
Any help on this will be appreciated.
Regards,
Ashay Jaiswal
KPIT Cummins Infosystems Ltd,
Pune (INDIA)
~~
Free download of GNU based SH-Linux toolchains for Renesas' SH Series.
The following site also offers free technical support to its users.
Visit http://www.kpitgnutools.com for details.
Latest versions of KPIT GNU SH-Linux tools were released on April 5, 2007.
~
--
Summary: SH- Aliasing problem for incompatible pointers in c code
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Ashay dot Jaiswal at kpitcummins dot com
GCC build triplet: i686-pc-gnu
GCC host triplet: sh4-unknown-linux
GCC target triplet: sh4-unknown-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31949
[Bug c/31701] New: Program giving segmentation fault with '-O2' optimization.
Hello all,
I have successfully built SH4-Linux toolchain based on
(binutils-2.17, gcc-4.2-20061205, glibc-2.5) for Renesas SH target.
I am facing problem while executing the following program.
--
#include stdio.h
extern void func();
typedef struct abc {
char name[16];
}ABC;
main()
{
int i;
ABC buffer[20];
for (i=0; i20; i++)
buffer[i].name[0] = 't';
if (buffer[10].name[0] == 't')
printf(OK\n);
else
printf(NOT OK\n);
}
-
The above program when compiled with '-O0' optimization executes successfully,
but I am getting segmentation fault error while executing the program compiled
with '-O2' optimization.
Observations:
1. I found differences in the assembly output of the program when compiled
with '-O0' and '-O2' optimization.
It seems stack register get corrupted with '-O2' optimization.
Following code corrupts the stack register
L10:
mov.w .L18,r14
mov.l .L19,r1
add r14,r14
mov r14,r15here it is corrupting the stack register
mov.l @r15+,r14
jmp @r1
nop
.align 1
2. Program executes successfully when compiled with '-O2' and
'-fno-optimize-sibling-calls' options.
3. Same problem is encountered with gcc-4.0.1 and after reverting the
patch PR21265(http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21265) the program
executes successfully with '-O2' optimization. But this solution doesn't
work with gcc-4.2-20061205 based toolchain.
Any help on this will be appreciated.
Regards,
Ashay Jaiswal
KPIT Cummins Infosystems Ltd,
Pune (INDIA)
~~
Free download of GNU based SH-Linux toolchains for Renesas' SH Series.
The following site also offers free technical support to its users.
Visit http://www.kpitgnutools.com for details.
Latest versions of KPIT GNU SH-Linux tools were released on April 5, 2007.
~~
--
Summary: Program giving segmentation fault with '-O2'
optimization.
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Ashay dot Jaiswal at kpitcummins dot com
GCC build triplet: i686-pc-linux
GCC host triplet: sh4-unknown-linux
GCC target triplet: sh4-unknown-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31701
