Re: [avr-gcc-list] uint8_t SRAM variable for ATmega328p allocated at 0x060 (instead of 0x0100) in avr-gcc 4.6.2, 7.3.2

[Kirill Shklovsky]

> Could you pass -v and -Wl,--verbose to the link command line as well and
> show us the output? That'll tell us if avr-gcc passed the right VMA for
> .data, and will also print the linker script used, so we can see if
> you ran into the binutils bug JW mentioned.

$ /usr/local/avr/bin/avr-gcc
-Wl,--gc-sections,-Map,obj/testVolatile.elf.map  -mmcu=atmega328
/usr/local/avr/avr/lib/libm.a -o obj/testVolatile.elf obj/main.o -v
-Wl,--verbose -lm
Using built-in specs.
COLLECT_GCC=/usr/local/avr/bin/avr-gcc
COLLECT_LTO_WRAPPER=/usr/local/avr/libexec/gcc/avr/4.7.3/lto-wrapper.exe
Target: avr
Configured with: ../configure --prefix=/usr/local/avr --target=avr
--enable-languages=c,c++ --disable-nls --disable-libssp --with-dwarf2
Thread model: single
gcc version 4.7.3 (GCC)
COMPILER_PATH=/usr/local/avr/libexec/gcc/avr/4.7.3/:/usr/local/avr/libexec/gcc/avr/4.7.3/:/usr/local/avr/libexec/gcc/avr/:/usr/local/avr/lib/gcc/avr/4.7.3/:/usr/local/avr/lib/gcc/avr/:/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/bin/
LIBRARY_PATH=/usr/local/avr/lib/gcc/avr/4.7.3/avr5/:/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/:/usr/local/avr/lib/gcc/avr/4.7.3/:/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/
COLLECT_GCC_OPTIONS='-mmcu=atmega328' '-o' 'obj/testVolatile.elf' '-v'
 /usr/local/avr/libexec/gcc/avr/4.7.3/collect2.exe -m avr5 -Tdata
0x800100 -o obj/testVolatile.elf
/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/crtm328.o
-L/usr/local/avr/lib/gcc/avr/4.7.3/avr5
-L/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5
-L/usr/local/avr/lib/gcc/avr/4.7.3
-L/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib --gc-sections
-Map obj/testVolatile.elf.map /usr/local/avr/avr/lib/libm.a obj/main.o
--verbose -lm -lgcc -lc -lgcc
GNU ld (GNU Binutils) 2.22
  Supported emulations:
   avr2
   avr1
   avr25
   avr3
   avr31
   avr35
   avr4
   avr5
   avr51
   avr6
   avrxmega1
   avrxmega2
   avrxmega3
   avrxmega4
   avrxmega5
   avrxmega6
   avrxmega7
opened script file /usr/local/avr/avr/bin/../lib/ldscripts/avr5.x
using external linker script:
==================================================
/* Default linker script, for normal executables */
OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
OUTPUT_ARCH(avr:5)
MEMORY
{
  text   (rx)   : ORIGIN = 0, LENGTH = 128K
  data   (rw!x) : ORIGIN = 0x800060, LENGTH = 0xffa0
  eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = 64K
  fuse      (rw!x) : ORIGIN = 0x820000, LENGTH = 1K
  lock      (rw!x) : ORIGIN = 0x830000, LENGTH = 1K
  signature (rw!x) : ORIGIN = 0x840000, LENGTH = 1K
}
SECTIONS
{
  /* Read-only sections, merged into text segment: */
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    {
      *(.rel.text)
      *(.rel.text.*)
      *(.rel.gnu.linkonce.t*)
    }
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    {
      *(.rela.text)
      *(.rela.text.*)
      *(.rela.gnu.linkonce.t*)
    }
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    {
      *(.rel.rodata)
      *(.rel.rodata.*)
      *(.rel.gnu.linkonce.r*)
    }
  .rela.rodata   :
    {
      *(.rela.rodata)
      *(.rela.rodata.*)
      *(.rela.gnu.linkonce.r*)
    }
  .rel.data      :
    {
      *(.rel.data)
      *(.rel.data.*)
      *(.rel.gnu.linkonce.d*)
    }
  .rela.data     :
    {
      *(.rela.data)
      *(.rela.data.*)
      *(.rela.gnu.linkonce.d*)
    }
  .rel.ctors     : { *(.rel.ctors)      }
  .rela.ctors    : { *(.rela.ctors)     }
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  .rela.dtors    : { *(.rela.dtors)     }
  .rel.got       : { *(.rel.got)                }
  .rela.got      : { *(.rela.got)               }
  .rel.bss       : { *(.rel.bss)                }
  .rela.bss      : { *(.rela.bss)               }
  .rel.plt       : { *(.rel.plt)                }
  .rela.plt      : { *(.rela.plt)               }
  /* Internal text space or external memory.  */
  .text   :
  {
    *(.vectors)
    KEEP(*(.vectors))
    /* For data that needs to reside in the lower 64k of progmem.  */
    *(.progmem.gcc*)
    *(.progmem*)
    . = ALIGN(2);
     __trampolines_start = . ;
    /* The jump trampolines for the 16-bit limited relocs will reside here.  */
    *(.trampolines)
    *(.trampolines*)
     __trampolines_end = . ;
    /* For future tablejump instruction arrays for 3 byte pc devices.
       We don't relax jump/call instructions within these sections.  */
    *(.jumptables)
    *(.jumptables*)
    /* For code that needs to reside in the lower 128k progmem.  */
    *(.lowtext)
    *(.lowtext*)
     __ctors_start = . ;
     *(.ctors)
     __ctors_end = . ;
     __dtors_start = . ;
     *(.dtors)
     __dtors_end = . ;
    KEEP(SORT(*)(.ctors))
    KEEP(SORT(*)(.dtors))
    /* From this point on, we don't bother about wether the insns are
       below or above the 16 bits boundary.  */
    *(.init0)  /* Start here after reset.  */
    KEEP (*(.init0))
    *(.init1)
    KEEP (*(.init1))
    *(.init2)  /* Clear __zero_reg__, set up stack pointer.  */
    KEEP (*(.init2))
    *(.init3)
    KEEP (*(.init3))
    *(.init4)  /* Initialize data and BSS.  */
    KEEP (*(.init4))
    *(.init5)
    KEEP (*(.init5))
    *(.init6)  /* C++ constructors.  */
    KEEP (*(.init6))
    *(.init7)
    KEEP (*(.init7))
    *(.init8)
    KEEP (*(.init8))
    *(.init9)  /* Call main().  */
    KEEP (*(.init9))
    *(.text)
    . = ALIGN(2);
    *(.text.*)
    . = ALIGN(2);
    *(.fini9)  /* _exit() starts here.  */
    KEEP (*(.fini9))
    *(.fini8)
    KEEP (*(.fini8))
    *(.fini7)
    KEEP (*(.fini7))
    *(.fini6)  /* C++ destructors.  */
    KEEP (*(.fini6))
    *(.fini5)
    KEEP (*(.fini5))
    *(.fini4)
    KEEP (*(.fini4))
    *(.fini3)
    KEEP (*(.fini3))
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    KEEP (*(.fini2))
    *(.fini1)
    KEEP (*(.fini1))
    *(.fini0)  /* Infinite loop after program termination.  */
    KEEP (*(.fini0))
     _etext = . ;
  }  > text
  .data   : AT (ADDR (.text) + SIZEOF (.text))
  {
     PROVIDE (__data_start = .) ;
    *(.data)
    *(.data*)
    *(.rodata)  /* We need to include .rodata here if gcc is used */
    *(.rodata*) /* with -fdata-sections.  */
    *(.gnu.linkonce.d*)
    . = ALIGN(2);
     _edata = . ;
     PROVIDE (__data_end = .) ;
  }  > data
  .bss   : AT (ADDR (.bss))
  {
     PROVIDE (__bss_start = .) ;
    *(.bss)
    *(.bss*)
    *(COMMON)
     PROVIDE (__bss_end = .) ;
  }  > data
   __data_load_start = LOADADDR(.data);
   __data_load_end = __data_load_start + SIZEOF(.data);
  /* Global data not cleared after reset.  */
  .noinit  :
  {
     PROVIDE (__noinit_start = .) ;
    *(.noinit*)
     PROVIDE (__noinit_end = .) ;
     _end = . ;
     PROVIDE (__heap_start = .) ;
  }  > data
  .eeprom  :
  {
    *(.eeprom*)
     __eeprom_end = . ;
  }  > eeprom
  .fuse  :
  {
    KEEP(*(.fuse))
    KEEP(*(.lfuse))
    KEEP(*(.hfuse))
    KEEP(*(.efuse))
  }  > fuse
  .lock  :
  {
    KEEP(*(.lock*))
  }  > lock
  .signature  :
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  }  > signature
  /* Stabs debugging sections.  */
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     Symbols in the DWARF debugging sections are relative to the beginning
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  .debug_loc      0 : { *(.debug_loc) }
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}

==================================================
attempt to open
/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/crtm328.o
succeeded
/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/crtm328.o
attempt to open /usr/local/avr/avr/lib/libm.a succeeded
attempt to open obj/main.o succeeded
obj/main.o
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libm.so failed
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libm.a failed
attempt to open
/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/libm.so
failed
attempt to open
/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/libm.a
succeeded
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libgcc.so failed
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libgcc.a succeeded
(/usr/local/avr/lib/gcc/avr/4.7.3/avr5/libgcc.a)_exit.o
(/usr/local/avr/lib/gcc/avr/4.7.3/avr5/libgcc.a)_clear_bss.o
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libc.so failed
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libc.a failed
attempt to open
/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/libc.so
failed
attempt to open
/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/libc.a
succeeded
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libgcc.so failed
attempt to open /usr/local/avr/lib/gcc/avr/4.7.3/avr5/libgcc.a succeeded