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PR30592 objcopy: allow --set-section-flags to add or remove SHF_X86_64_LARGE

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For example, objcopy --set-section-flags .data=alloc,large will add
SHF_X86_64_LARGE to the .data section.  Omitting "large" will drop the
SHF_X86_64_LARGE flag.

The bfd_section flag is named generically, SEC_ELF_LARGE, in case other
processors want to follow SHF_X86_64_LARGE.  SEC_ELF_LARGE has the same
value as SEC_TIC54X_BLOCK used by coff.

bfd/
    * section.c: Define SEC_ELF_LARGE.
    * bfd-in2.h: Regenerate.
    * elf64-x86-64.c (elf_x86_64_section_flags, elf_x86_64_fake_sections,
    elf_x86_64_copy_private_section_data): New.

binutils/
    * NEWS: Mention the new feature for objcopy.
    * doc/binutils.texi: Mention "large".
    * objcopy.c (parse_flags): Parse "large".
    (check_new_section_flags): Error if "large" is used with a
    non-x86-64 ELF target.
    * testsuite/binutils-all/x86-64/large-sections.d: New.
    * testsuite/binutils-all/x86-64/large-sections.s: New.
    * testsuite/binutils-all/x86-64/large-sections-i386.d: New.
    * testsuite/binutils-all/x86-64/large-sections-2.d: New.
    * testsuite/binutils-all/x86-64/large-sections-2-x32.d: New.
This commit is contained in:
Fangrui Song
2023-07-09 10:57:19 -07:00
committed by Fangrui Song
parent 4fb2abb59d
commit 5e24da908d
13 changed files with 155 additions and 10 deletions
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15
binutils/testsuite/binutils-all/x86-64/large-sections-2-x32.d Normal file
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@@ -0,0 +1,15 @@
#source: large-sections.s
#PROG: objcopy
#as: --x32
#objcopy: --set-section-flags .ldata=alloc
#readelf: -S -W
#...
\[[ 0-9]+\] \.text.*[ \t]+PROGBITS[ \t0-9a-f]+AX[ \t]+.*
#...
\[[ 0-9]+\] \.data.*[ \t]+PROGBITS[ \t0-9a-f]+WA[ \t]+.*
#...
\[[ 0-9]+\] \.ltext.*[ \t]+PROGBITS[ \t0-9a-f]+AXl[ \t]+.*
#...
\[[ 0-9]+\] \.ldata.*[ \t]+PROGBITS[ \t0-9a-f]+WA[ \t]+.*
#pass

15
binutils/testsuite/binutils-all/x86-64/large-sections-2.d Normal file
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@@ -0,0 +1,15 @@
#source: large-sections.s
#PROG: objcopy
#as: --64
#objcopy: --set-section-flags .ldata=alloc
#readelf: -S -W
#...
\[[ 0-9]+\] \.text.*[ \t]+PROGBITS[ \t0-9a-f]+AX[ \t]+.*
#...
\[[ 0-9]+\] \.data.*[ \t]+PROGBITS[ \t0-9a-f]+WA[ \t]+.*
#...
\[[ 0-9]+\] \.ltext.*[ \t]+PROGBITS[ \t0-9a-f]+AXl[ \t]+.*
#...
\[[ 0-9]+\] \.ldata.*[ \t]+PROGBITS[ \t0-9a-f]+WA[ \t]+.*
#pass

6
binutils/testsuite/binutils-all/x86-64/large-sections-i386.d Normal file
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@@ -0,0 +1,6 @@
#source: large-sections.s
#PROG: objcopy
#as: --64
#objcopy: -O elf32-i386 --set-section-flags .data=alloc,large
#target: x86_64-*-linux*
#error: \A[^[]*\[.data\]: 'large' flag is ELF x86-64 specific

14
binutils/testsuite/binutils-all/x86-64/large-sections.d Normal file
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@@ -0,0 +1,14 @@
#PROG: objcopy
#as: --64
#objcopy: --set-section-flags .text=alloc,readonly,code,large --set-section-flags .data=alloc,large
#readelf: -S -W
#...
\[[ 0-9]+\] \.text.*[ \t]+PROGBITS[ \t0-9a-f]+AXl[ \t]+.*
#...
\[[ 0-9]+\] \.data.*[ \t]+PROGBITS[ \t0-9a-f]+WAl[ \t]+.*
#...
\[[ 0-9]+\] \.ltext.*[ \t]+PROGBITS[ \t0-9a-f]+AXl[ \t]+.*
#...
\[[ 0-9]+\] \.ldata.*[ \t]+PROGBITS[ \t0-9a-f]+WAl[ \t]+.*
#pass

8
binutils/testsuite/binutils-all/x86-64/large-sections.s Normal file
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@@ -0,0 +1,8 @@
.section .text, "ax"
nop
.section .data, "aw"
.byte 1
.section .ltext, "axl"
nop
.section .ldata, "awl"
.byte 1