mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
233cc9c13a
If a backend supports it, PLT entry isn't needed when all references to a STT_GNU_IFUNC symbols are done via GOT or static function pointers. For GOT entries, We generate dynamic R_*_GLOB_DAT relocations for preemptable symbols and R_*_IRELATIVE relocations for non-preemptable symbols to update them with real function address. For static pointer pointers, we generate dynamic pointer relocations and store them in: 1. .rel[a].ifunc section in PIC object. 2. .rel[a].got section in dynamic executable. 3. .rel[a].iplt section in static executable. We don't allocate GOT entry if it isn't used. bfd/ PR ld/20253 * elf-bfd.h (_bfd_elf_allocate_ifunc_dyn_relocs): Add an bfd_boolean argument. * elf-ifunc.c (_bfd_elf_create_ifunc_sections): Replace "shared object" with "PIC object" in comments. (_bfd_elf_allocate_ifunc_dyn_relocs): Updated. Replace "shared object" with "PIC object" in comments. Avoid PLT if requested. Generate dynamic relocations for non-GOT references. Make room for the special first entry in PLT and allocate PLT entry only for PLT and PC-relative references. Store dynamic GOT relocations in .rel[a].iplt section for static executables. If PLT isn't used, always use GOT for symbol value. Don't allocate GOT entry if it isn't used. * elf32-i386.c (elf_i386_check_relocs): Increment PLT reference count only in the code section. Allocate dynamic pointer relocation against STT_GNU_IFUNC symbol in the non-code section. (elf_i386_adjust_dynamic_symbol): Increment PLT reference count only for PC-relative references. (elf_i386_allocate_dynrelocs): Pass TRUE to _bfd_elf_allocate_ifunc_dyn_relocs. (elf_i386_relocate_section): Allow R_386_GOT32/R_386_GOT32X relocations against STT_GNU_IFUNC symbols without PLT. Generate dynamic pointer relocation against STT_GNU_IFUNC symbol in the non-code section and store it in the proper REL section. Don't allow non-pointer relocation against STT_GNU_IFUNC symbol without PLT. (elf_i386_finish_dynamic_symbol): Generate dynamic R_386_IRELATIVE and R_386_GLOB_DAT GOT relocations against STT_GNU_IFUNC symbols without PLT. (elf_i386_finish_dynamic_sections): Don't handle local STT_GNU_IFUNC symbols here. (elf_i386_output_arch_local_syms): Handle local STT_GNU_IFUNC symbols here. (elf_backend_output_arch_local_syms): New. * elf32-x86-64.c (elf_i386_check_relocs): Increment PLT reference count only in the code section. Allocate dynamic pointer relocation against STT_GNU_IFUNC symbol in the non-code section. (elf_x86_64_adjust_dynamic_symbol): Increment PLT reference count only for PC-relative references. (elf_x86_64_allocate_dynrelocs): Pass TRUE to _bfd_elf_allocate_ifunc_dyn_relocs. (elf_x86_64_relocate_section): Allow R_X86_64_GOTPCREL, R_X86_64_GOTPCRELX, R_X86_64_REX_GOTPCRELX and R_X86_64_GOTPCREL64 relocations against STT_GNU_IFUNC symbols without PLT. Generate dynamic pointer relocation against STT_GNU_IFUNC symbol in the non-code section and store it in the proper RELA section. Don't allow non-pointer relocation against STT_GNU_IFUNC symbol without PLT. (elf_x86_64_finish_dynamic_symbol): Generate dynamic R_X86_64_IRELATIVE and R_X86_64_GLOB_DAT GOT relocations against STT_GNU_IFUNC symbols without PLT. (elf_x86_64_finish_dynamic_sections): Don't handle local STT_GNU_IFUNC symbols here. (elf_x86_64_output_arch_local_syms): Handle local STT_GNU_IFUNC symbols here. (elf_backend_output_arch_local_syms): New. * elfnn-aarch64.c (elfNN_aarch64_allocate_ifunc_dynrelocs): Pass FALSE to _bfd_elf_allocate_ifunc_dyn_relocs. ld/ PR ld/20253 * testsuite/ld-i386/i386.exp: Run PR ld/20253 tests. * testsuite/ld-i386/no-plt.exp: Likewise. * testsuite/ld-x86-64/no-plt.exp: Likewise. * testsuite/ld-i386/pr13302.d: Remove .rel.plt section. * testsuite/ld-ifunc/ifunc-13-i386.d: Likewise. * testsuite/ld-ifunc/ifunc-13-x86-64.d: Likewise. * testsuite/ld-ifunc/ifunc-15-i386.d: Likewise. * testsuite/ld-ifunc/ifunc-15-x86-64.d: Likewise. * testsuite/ld-x86-64/pr13082-5a.d: Likewise. * testsuite/ld-x86-64/pr13082-5b.d: Likewise. * testsuite/ld-x86-64/pr13082-6a.d: Likewise. * testsuite/ld-x86-64/pr13082-6b.d: Likewise. * testsuite/ld-i386/pr20244-2a.d: Remove .plt section. * testsuite/ld-ifunc/ifunc-21-i386.d: Likewise. * testsuite/ld-ifunc/ifunc-21-x86-64.d: Likewise. * testsuite/ld-ifunc/ifunc-22-i386.d: Likewise. * testsuite/ld-ifunc/ifunc-22-x86-64.d: Likewise. * testsuite/ld-i386/pr20244-2b.d: Updated. * testsuite/ld-i386/pr20244-2c.d: Likewise. * testsuite/ld-ifunc/ifunc-18a-i386.d: Likewise. * testsuite/ld-ifunc/ifunc-18a-x86-64.d: Likewise. * testsuite/ld-ifunc/ifunc-18b-i386.d: Likewise. * testsuite/ld-ifunc/ifunc-18b-x86-64.d: Likewise. * testsuite/ld-i386/pr20253-1a.c: New file. * testsuite/ld-i386/pr20253-1b.S: Likewise. * testsuite/ld-i386/pr20253-1c.S: Likewise. * testsuite/ld-i386/pr20253-1d.S: Likewise. * testsuite/ld-i386/pr20253-2a.c: Likewise. * testsuite/ld-i386/pr20253-2b.S: Likewise. * testsuite/ld-i386/pr20253-2c.S: Likewise. * testsuite/ld-i386/pr20253-2d.S: Likewise. * testsuite/ld-i386/pr20253-3.d: Likewise. * testsuite/ld-i386/pr20253-3.s: Likewise. * testsuite/ld-i386/pr20253-4.s: Likewise. * testsuite/ld-i386/pr20253-4a.d: Likewise. * testsuite/ld-i386/pr20253-4b.d: Likewise. * testsuite/ld-i386/pr20253-4c.d: Likewise. * testsuite/ld-i386/pr20253-5.d: Likewise. * testsuite/ld-i386/pr20253-5.s: Likewise. * testsuite/ld-ifunc/ifunc-23-x86.s: Likewise. * testsuite/ld-ifunc/ifunc-23a-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-23b-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-23c-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-24-x86.s: Likewise. * testsuite/ld-ifunc/ifunc-24a-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-24b-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-24c-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-25-x86.s: Likewise. * testsuite/ld-ifunc/ifunc-25a-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-25b-x86.d: Likewise. * testsuite/ld-ifunc/ifunc-25c-x86.d: Likewise. * testsuite/ld-x86-64/pr20253-1.s: Likewise. * testsuite/ld-x86-64/pr20253-1a.d: Likewise. * testsuite/ld-x86-64/pr20253-1b.d: Likewise. * testsuite/ld-x86-64/pr20253-1c.d: Likewise. * testsuite/ld-x86-64/pr20253-1d.d: Likewise. * testsuite/ld-x86-64/pr20253-1e.d: Likewise. * testsuite/ld-x86-64/pr20253-1f.d: Likewise. * testsuite/ld-x86-64/pr20253-1g.d: Likewise. * testsuite/ld-x86-64/pr20253-1h.d: Likewise. * testsuite/ld-x86-64/pr20253-1i.d: Likewise. * testsuite/ld-x86-64/pr20253-1j.d: Likewise. * testsuite/ld-x86-64/pr20253-1k.d: Likewise. * testsuite/ld-x86-64/pr20253-1l.d: Likewise. * testsuite/ld-x86-64/pr20253-2a.c: Likewise. * testsuite/ld-x86-64/pr20253-2b.S: Likewise. * testsuite/ld-x86-64/pr20253-2c.S: Likewise. * testsuite/ld-x86-64/pr20253-2d.S: Likewise. * testsuite/ld-x86-64/pr20253-3.d: Likewise. * testsuite/ld-x86-64/pr20253-3.s: Likewise. * testsuite/ld-x86-64/pr20253-4.s: Likewise. * testsuite/ld-x86-64/pr20253-4a.d: Likewise. * testsuite/ld-x86-64/pr20253-4b.d: Likewise. * testsuite/ld-x86-64/pr20253-4c.d: Likewise. * testsuite/ld-x86-64/pr20253-4d.d: Likewise. * testsuite/ld-x86-64/pr20253-4e.d: Likewise. * testsuite/ld-x86-64/pr20253-4f.d: Likewise. * testsuite/ld-x86-64/pr20253-5.s: Likewise. * testsuite/ld-x86-64/pr20253-5a.d: Likewise. * testsuite/ld-x86-64/pr20253-5b.d: Likewise. * testsuite/ld-ifunc/ifunc-18a-i386.d: Remove extra IRELATIVE relocation. * testsuite/ld-ifunc/ifunc-18a-x86-64.d: Likewise. * testsuite/ld-ifunc/ifunc-18b-i386.d: Likewise. * testsuite/ld-ifunc/ifunc-18b-x86-64.d: Likewise. * testsuite/ld-ifunc/ifunc-18a.s: Fix a typo. * testsuite/ld-x86-64/x86-64.exp: Run pr20253-1 tests.
53 lines
1.0 KiB
ArmAsm
53 lines
1.0 KiB
ArmAsm
.section .rodata.str1.1,"aMS",@progbits,1
|
|
.LC0:
|
|
.string "PASS"
|
|
.text
|
|
.globl check
|
|
.type check, @function
|
|
check:
|
|
pushl %ebx
|
|
call __x86.get_pc_thunk.bx
|
|
addl $_GLOBAL_OFFSET_TABLE_, %ebx
|
|
subl $8, %esp
|
|
call *get_func1@GOT(%ebx)
|
|
#ifdef CHECK_PLT
|
|
cmpl $func1, %eax
|
|
#else
|
|
cmpl func1@GOT(%ebx), %eax
|
|
#endif
|
|
jne .L3
|
|
movl func1_p@GOT(%ebx), %edx
|
|
cmpl %eax, (%edx)
|
|
jne .L3
|
|
call *func1@GOT(%ebx)
|
|
cmpl $1, %eax
|
|
jne .L3
|
|
call *call_func1@GOT(%ebx)
|
|
cmpl $1, %eax
|
|
jne .L3
|
|
call *get_func2@GOT(%ebx)
|
|
movl func2_p@GOT(%ebx), %edx
|
|
cmpl %eax, (%edx)
|
|
jne .L3
|
|
call *call_func2@GOT(%ebx)
|
|
cmpl $2, %eax
|
|
jne .L3
|
|
leal .LC0@GOTOFF(%ebx), %eax
|
|
subl $12, %esp
|
|
pushl %eax
|
|
call *puts@GOT(%ebx)
|
|
addl $24, %esp
|
|
popl %ebx
|
|
ret
|
|
.L3:
|
|
call *abort@GOT(%ebx)
|
|
.size check, .-check
|
|
.section .text.__x86.get_pc_thunk.bx,"axG",@progbits,__x86.get_pc_thunk.bx,comdat
|
|
.globl __x86.get_pc_thunk.bx
|
|
.hidden __x86.get_pc_thunk.bx
|
|
.type __x86.get_pc_thunk.bx, @function
|
|
__x86.get_pc_thunk.bx:
|
|
movl (%esp), %ebx
|
|
ret
|
|
.section .note.GNU-stack,"",@progbits
|