http://sourceware.org/bugzilla/show_bug.cgi?id=13867
Bug #: 13867
Summary: wrong attributes for Cortex-M3
Product: binutils
Version: 2.22
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: unassig...@sourceware.org
ReportedBy: benjamin.h...@resol.de
Classification: Unclassified
Cite from mailing list [1]:
However, you have shown a bug in the linker's output here:
toolchain-test.elf:
Attribute Section: aeabi
File Attributes
Tag_CPU_name: "Cortex-M3"
Tag_CPU_arch: v7
Tag_CPU_arch_profile: Microcontroller
Tag_ARM_ISA_use: Yes
Tag_THUMB_ISA_use: Thumb-2
Cortex-M3 doesn't support ARM state instructions, but the linked image does.
The linker should output different attributes here (not least
Tag_CPU_arch_profile should not be 'Microcontroller').
Steps to reproduce:
a) input program
#include <stdlib.h>
int main(int argc, char **argv)
{
int x = atoi("123");
return x;
}
b) compile with
arm-none-eabi-gcc -o toolchain-test.elf -Wall -nostartfiles -msoft-float
-mlittle-endian -Wl,-t -mthumb -mcpu=cortex-m3 -Wl,--entry=main main.c
NOTE: the used library was compiled with arm-v4t
Attribute Section: aeabi
File Attributes
Tag_CPU_name: "ARM7TDMI"
Tag_CPU_arch: v4T
(this is definitive wrong, but should not affect linker attributes for linked
image)
c) arm-none-eabi-readelf
Attribute Section: aeabi
File Attributes
Tag_CPU_name: "Cortex-M3"
Tag_CPU_arch: v7
Tag_CPU_arch_profile: Microcontroller
Tag_ARM_ISA_use: Yes
Tag_THUMB_ISA_use: Thumb-2
Tag_ABI_PCS_wchar_t: 4
Tag_ABI_FP_denormal: Needed
Tag_ABI_FP_exceptions: Needed
Tag_ABI_FP_number_model: IEEE 754
Tag_ABI_align_needed: 8-byte
Tag_ABI_align_preserved: 8-byte, except leaf SP
Tag_ABI_enum_size: small
Tag_ABI_optimization_goals: Aggressive Debug
[1] mailing list post
http://sourceware.org/ml/binutils/2012-03/msg00215.html
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