CODEWITHSUNDEEP
cgcckernelx86-64elf
SpilledMango
SpilledMango

Reputation: 615

GCC store all strings in .rodata

In my x86-64 kernel, I am trying to map the .rodata ELF section as readonly. But all the string literals, are stored in a file-specific section, e.g. .rodata.str1.8. Are there any option for GCC to store all strings in .rodata instead, or can I concatenate the .rodata.str.x into .rodata using ld, objdump or anything else?

ENTRY(_start)

SECTIONS {
  . = 0xC0100000;
  kernel_memory_start = .;
  .boot ALIGN(8) :
  {
  *(.multiboot)
  }

  .text ALIGN(4K) : AT(ADDR(.text) - 0xC0000000)
  {
  kernel_text_start = .;
    *(.text)
  }
  kernel_text_end = .;
  .rodata ALIGN(4K) : AT(ADDR(.rodata) - 0xC0000000)
  {
    kernel_rodata_start = .;
  *(.rodata)
  }
  kernel_rodata_end = .;

  .data ALIGN(4K) : AT(ADDR(.data) - 0xC0000000)
  {
  kernel_data_start = .;
    *(.data)
  }
  kernel_data_end = .;

  .bss ALIGN(4K) : AT(ADDR(.bss) - 0xC0000000)
  {
  kernel_bss_start = .;
    *(.bss)
  }
  kernel_bss_end = .;
  kernel_memory_end = .;
}

Compiler flags:

gcc -ffreestanding -mcmodel=large -fno-pic -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-3dnow -mno-80387 -fno-unwind-tables ...

Linker flags:

ld -nostdlib -n ...

Upvotes: 1

Views: 1669

Answers (1)

prl
prl

Reputation: 12435

In your linker file, use *(.rodata*)

Upvotes: 3

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