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Clang's integrated assembler supports multiple section with the same name: .section .text,"ax",@progbits,unique,1 nop .section .text,"ax",@progbits,unique,2 nop "unique,N" assigns the number, N, as the section ID, to a section. The valid values of the section ID are between 0 and 4294967295. It can be used to distinguish different sections with the same section name. This is useful with -fno-unique-section-names -ffunction-sections. -ffunction-sections by default generates .text.foo, .text.bar, etc. Using the same string can save lots of space in .strtab. This patch adds section_id to bfd_section and reuses the linker internal bit in BFD section flags, SEC_LINKER_CREATED, for assmebler internal use to mark valid section_id. It also updates objdump to compare section pointers if 2 sections comes from the same file since 2 different sections can have the same section name. bfd/ PR gas/25380 * bfd-in2.h: Regenerated. * ecoff.c (bfd_debug_section): Add section_id. * section.c (bfd_section): Add section_id. (SEC_ASSEMBLER_SECTION_ID): New. (BFD_FAKE_SECTION): Add section_id. binutils/ PR gas/25380 * objdump.c (sym_ok): Return FALSE if 2 sections are in the same file with different section pointers. gas/ PR gas/25380 * config/obj-elf.c (section_match): Removed. (get_section): Also match SEC_ASSEMBLER_SECTION_ID and section_id. (obj_elf_change_section): Replace info and group_name arguments with match_p. Also update the section ID and flags from match_p. (obj_elf_section): Handle "unique,N". Update call to obj_elf_change_section. * config/obj-elf.h (elf_section_match): New. (obj_elf_change_section): Updated. * config/tc-arm.c (start_unwind_section): Update call to obj_elf_change_section. * config/tc-ia64.c (obj_elf_vms_common): Likewise. * config/tc-microblaze.c (microblaze_s_data): Likewise. (microblaze_s_sdata): Likewise. (microblaze_s_rdata): Likewise. (microblaze_s_bss): Likewise. * config/tc-mips.c (s_change_section): Likewise. * config/tc-msp430.c (msp430_profiler): Likewise. * config/tc-rx.c (parse_rx_section): Likewise. * config/tc-tic6x.c (tic6x_start_unwind_section): Likewise. * doc/as.texi: Document "unique,N" in .section directive. * testsuite/gas/elf/elf.exp: Run "unique,N" tests. * testsuite/gas/elf/section15.d: New file. * testsuite/gas/elf/section15.s: Likewise. * testsuite/gas/elf/section16.s: Likewise. * testsuite/gas/elf/section16a.d: Likewise. * testsuite/gas/elf/section16b.d: Likewise. * testsuite/gas/elf/section17.d: Likewise. * testsuite/gas/elf/section17.l: Likewise. * testsuite/gas/elf/section17.s: Likewise. * testsuite/gas/i386/unique.d: Likewise. * testsuite/gas/i386/unique.s: Likewise. * testsuite/gas/i386/x86-64-unique.d: Likewise. * testsuite/gas/i386/i386.exp: Run unique and x86-64-unique. ld/ PR gas/25380 * testsuite/ld-i386/pr22001-1c.S: Use "unique,N" in .section directives. * testsuite/ld-i386/tls-gd1.S: Likewise. * testsuite/ld-x86-64/pr21481b.S: Likewise.
65 lines
1.3 KiB
ArmAsm
65 lines
1.3 KiB
ArmAsm
.text
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.p2align 4,,15
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.globl get_gd
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.type get_gd, @function
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get_gd:
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pushl %ebx
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call __x86.get_pc_thunk.bx
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addl $_GLOBAL_OFFSET_TABLE_, %ebx
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subl $8, %esp
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leal gd@tlsgd(,%ebx,1), %eax
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call ___tls_get_addr@PLT
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addl $8, %esp
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popl %ebx
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ret
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.size get_gd, .-get_gd
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.p2align 4,,15
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.globl set_gd
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.type set_gd, @function
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set_gd:
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pushl %ebx
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call __x86.get_pc_thunk.bx
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addl $_GLOBAL_OFFSET_TABLE_, %ebx
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subl $8, %esp
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leal gd@tlsgd(%ebx), %eax
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call ___tls_get_addr@PLT
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nop
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movl 16(%esp), %edx
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movl %edx, (%eax)
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addl $8, %esp
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popl %ebx
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ret
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.size set_gd, .-set_gd
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.text
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.p2align 4,,15
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.globl test_gd
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.type test_gd, @function
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test_gd:
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call __x86.get_pc_thunk.cx
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addl $_GLOBAL_OFFSET_TABLE_, %ecx
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subl $12, %esp
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leal gd@tlsgd(%ecx), %eax
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call *___tls_get_addr@GOT(%ecx)
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movl 16(%esp), %ecx
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cmpl %ecx, (%eax)
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sete %al
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addl $12, %esp
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movzbl %al, %eax
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ret
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.size test_gd, .-test_gd
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.section .text,"axG",@progbits,__x86.get_pc_thunk.bx,comdat,unique,1
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.globl __x86.get_pc_thunk.bx
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.hidden __x86.get_pc_thunk.bx
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.type __x86.get_pc_thunk.bx, @function
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__x86.get_pc_thunk.bx:
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movl (%esp), %ebx
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ret
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.section .text,"axG",@progbits,__x86.get_pc_thunk.cx,comdat,unique,2
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.globl __x86.get_pc_thunk.cx
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.hidden __x86.get_pc_thunk.cx
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.type __x86.get_pc_thunk.cx, @function
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__x86.get_pc_thunk.cx:
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movl (%esp), %ecx
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ret
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.section .note.GNU-stack,"",@progbits
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