[need your help] about the linker script "x86_64-linux-gnu / ldscripts / elf_x86_64.xce"

[zhtuan via Gcc]

hi,


I am using ldscripts / elf_x86_64.xce for linking one c++ program, and need to 
mlock the rodata during software startup phase(make sure there is no min 
pagefault during accessing the many large static const array), how can we get 
the address of that rodata(seem we could get the __executable_start/__bss_start 
by default)? could we add   PROVIDE (__rodata_start = .) and PROVIDE 
(__rodata_end = .) for those rodata part in elf_x86_64.xce? is there other 
solution? thanks in advance.


...
  PROVIDE (__etext = .);
  PROVIDE (_etext = .);
  PROVIDE (etext = .);
  . = ALIGN(CONSTANT (MAXPAGESIZE));
  /* Adjust the address for the rodata segment.  We want to adjust up to
     the same address within the page on the next page up.  */
  . = SEGMENT_START("rodata-segment", ALIGN(CONSTANT (MAXPAGESIZE)) + (. & 
(CONSTANT (MAXPAGESIZE) - 1)));
  .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
  .rodata1        : { *(.rodata1) }
  .eh_frame_hdr   : { *(.eh_frame_hdr) *(.eh_frame_entry .eh_frame_entry.*) }
  .eh_frame       : ONLY_IF_RO { KEEP (*(.eh_frame)) *(.eh_frame.*) }
  .gcc_except_table   : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) }
  .gnu_extab   : ONLY_IF_RO { *(.gnu_extab*) }
  /* These sections are generated by the Sun/Oracle C++ compiler.  */
  .exception_ranges   : ONLY_IF_RO { *(.exception_ranges*) }
  /* Adjust the address for the data segment.  We want to adjust up to
     the same address within the page on the next page up.  */


Regards
zhang huituan