diff options
Diffstat (limited to 'sysdeps/x86_64/dl-tlsdesc.S')
| -rw-r--r-- | sysdeps/x86_64/dl-tlsdesc.S | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/sysdeps/x86_64/dl-tlsdesc.S b/sysdeps/x86_64/dl-tlsdesc.S index 3cb7c3d031..80d771cd88 100644 --- a/sysdeps/x86_64/dl-tlsdesc.S +++ b/sysdeps/x86_64/dl-tlsdesc.S @@ -1,5 +1,5 @@ /* Thread-local storage handling in the ELF dynamic linker. x86_64 version. - Copyright (C) 2004-2016 Free Software Foundation, Inc. + Copyright (C) 2004-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -37,6 +37,7 @@ cfi_startproc .align 16 _dl_tlsdesc_return: + _CET_ENDBR movq 8(%rax), %rax ret cfi_endproc @@ -58,6 +59,7 @@ _dl_tlsdesc_return: cfi_startproc .align 16 _dl_tlsdesc_undefweak: + _CET_ENDBR movq 8(%rax), %rax subq %fs:0, %rax ret @@ -96,6 +98,7 @@ _dl_tlsdesc_dynamic (register struct tlsdesc *tdp asm ("%rax")) cfi_startproc .align 16 _dl_tlsdesc_dynamic: + _CET_ENDBR /* Preserve call-clobbered registers that we modify. We need two scratch regs anyway. */ movq %rsi, -16(%rsp) @@ -128,7 +131,11 @@ _dl_tlsdesc_dynamic: movq %r10, 40(%rsp) movq %r11, 48(%rsp) /* %rdi already points to the tlsinfo data structure. */ +#ifdef NO_RTLD_HIDDEN + call JUMPTARGET (__tls_get_addr) +#else call HIDDEN_JUMPTARGET (__tls_get_addr) +#endif movq 8(%rsp), %rdx movq 16(%rsp), %rcx movq 24(%rsp), %r8 @@ -162,15 +169,17 @@ _dl_tlsdesc_dynamic: .align 16 /* The PLT entry will have pushed the link_map pointer. */ _dl_tlsdesc_resolve_rela: + _CET_ENDBR cfi_adjust_cfa_offset (8) - /* Save all call-clobbered registers. */ - subq $72, %rsp - cfi_adjust_cfa_offset (72) + /* Save all call-clobbered registers. Add 8 bytes for push in + the PLT entry to align the stack. */ + subq $80, %rsp + cfi_adjust_cfa_offset (80) movq %rax, (%rsp) movq %rdi, 8(%rsp) movq %rax, %rdi /* Pass tlsdesc* in %rdi. */ movq %rsi, 16(%rsp) - movq 72(%rsp), %rsi /* Pass link_map* in %rsi. */ + movq 80(%rsp), %rsi /* Pass link_map* in %rsi. */ movq %r8, 24(%rsp) movq %r9, 32(%rsp) movq %r10, 40(%rsp) @@ -187,8 +196,8 @@ _dl_tlsdesc_resolve_rela: movq 48(%rsp), %r11 movq 56(%rsp), %rdx movq 64(%rsp), %rcx - addq $80, %rsp - cfi_adjust_cfa_offset (-80) + addq $88, %rsp + cfi_adjust_cfa_offset (-88) jmp *(%rax) cfi_endproc .size _dl_tlsdesc_resolve_rela, .-_dl_tlsdesc_resolve_rela @@ -211,6 +220,7 @@ _dl_tlsdesc_resolve_rela: .align 16 _dl_tlsdesc_resolve_hold: 0: + _CET_ENDBR /* Save all call-clobbered registers. */ subq $72, %rsp cfi_adjust_cfa_offset (72) |