diff options
Diffstat (limited to 'nptl')
| -rw-r--r-- | nptl/ChangeLog | 2 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S | 128 |
2 files changed, 24 insertions, 106 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 2551faa..084ebe6 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -3,6 +3,8 @@ * sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S (__condvar_cleanup): Rewrite to use cfi directives instead of hand-coded unwind tables. + * sysdeps/unix/sysv/linux/x86_64/pthread_once.S (__pthread_once): + Likewise. 2009-06-12 Ulrich Drepper <drepper@redhat.com> diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S index c3b2b51..ccc1849 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -17,6 +17,7 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <sysdep.h> #include <kernel-features.h> #include <tcb-offsets.h> #include <lowlevellock.h> @@ -32,6 +33,15 @@ .align 16 __pthread_once: .LSTARTCODE: + cfi_startproc +#ifdef SHARED + cfi_personality(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect, + DW.ref.__gcc_personality_v0) + cfi_lsda(DW_EH_PE_pcrel | DW_EH_PE_sdata4, .LexceptSTART) +#else + cfi_personality(DW_EH_PE_udata4, __gcc_personality_v0) + cfi_lsda(DW_EH_PE_udata4, .LexceptSTART) +#endif testl $2, (%rdi) jz 1f xorl %eax, %eax @@ -39,7 +49,7 @@ __pthread_once: /* Preserve the function pointer. */ 1: pushq %rsi -.Lpush_rsi: + cfi_adjust_cfa_offset(8) xorq %r10, %r10 /* Not yet initialized or initialization in progress. @@ -86,9 +96,9 @@ __pthread_once: /* Preserve the pointer to the control variable. */ 3: pushq %rdi -.Lpush_rdi: + cfi_adjust_cfa_offset(8) pushq %rdi -.Lpush_rdi2: + cfi_adjust_cfa_offset(8) .LcleanupSTART: callq *16(%rsp) @@ -96,14 +106,14 @@ __pthread_once: /* Get the control variable address back. */ popq %rdi -.Lpop_rdi: + cfi_adjust_cfa_offset(-8) /* Sucessful run of the initializer. Signal that we are done. */ LOCK incl (%rdi) addq $8, %rsp -.Ladd1: + cfi_adjust_cfa_offset(-8) /* Wake up all other threads. */ movl $0x7fffffff, %edx @@ -117,10 +127,9 @@ __pthread_once: syscall 4: addq $8, %rsp -.Ladd2: + cfi_adjust_cfa_offset(-8) xorl %eax, %eax retq - .size __pthread_once,.-__pthread_once @@ -134,6 +143,7 @@ pthread_once = __pthread_once .type clear_once_control,@function .align 16 clear_once_control: + cfi_adjust_cfa_offset(3 * 8) movq (%rsp), %rdi movq %rax, %r8 movl $0, (%rdi) @@ -153,15 +163,15 @@ clear_once_control: call _Unwind_Resume@PLT hlt .LENDCODE: + cfi_endproc .size clear_once_control,.-clear_once_control .section .gcc_except_table,"a",@progbits .LexceptSTART: - .byte 0xff # @LPStart format (omit) - .byte 0xff # @TType format (omit) - .byte 0x01 # call-site format - # DW_EH_PE_uleb128 + .byte DW_EH_PE_omit # @LPStart format + .byte DW_EH_PE_omit # @TType format + .byte DW_EH_PE_uleb128 # call-site format .uleb128 .Lcstend-.Lcstbegin .Lcstbegin: .uleb128 .LcleanupSTART-.LSTARTCODE @@ -175,100 +185,6 @@ clear_once_control: .Lcstend: - .section .eh_frame,"a",@progbits -.LSTARTFRAME: - .long .LENDCIE-.LSTARTCIE # Length of the CIE. -.LSTARTCIE: - .long 0 # CIE ID. - .byte 1 # Version number. -#ifdef SHARED - .string "zPLR" # NUL-terminated augmentation - # string. -#else - .string "zPL" # NUL-terminated augmentation - # string. -#endif - .uleb128 1 # Code alignment factor. - .sleb128 -8 # Data alignment factor. - .byte 16 # Return address register - # column. -#ifdef SHARED - .uleb128 7 # Augmentation value length. - .byte 0x9b # Personality: DW_EH_PE_pcrel - # + DW_EH_PE_sdata4 - # + DW_EH_PE_indirect - .long DW.ref.__gcc_personality_v0-. - .byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel - # + DW_EH_PE_sdata4. - .byte 0x1b # FDE Encoding: DW_EH_PE_pcrel - # + DW_EH_PE_sdata4. -#else - .uleb128 10 # Augmentation value length. - .byte 0x0 # Personality: absolute - .quad __gcc_personality_v0 - .byte 0x0 # LSDA Encoding: absolute -#endif - .byte 0x0c # DW_CFA_def_cfa - .uleb128 7 - .uleb128 8 - .byte 0x90 # DW_CFA_offset, column 0x10 - .uleb128 1 - .align 8 -.LENDCIE: - - .long .LENDFDE-.LSTARTFDE # Length of the FDE. -.LSTARTFDE: - .long .LSTARTFDE-.LSTARTFRAME # CIE pointer. -#ifdef SHARED - .long .LSTARTCODE-. # PC-relative start address - # of the code. - .long .LENDCODE-.LSTARTCODE # Length of the code. - .uleb128 4 # Augmentation size - .long .LexceptSTART-. -#else - .quad .LSTARTCODE # Start address of the code. - .quad .LENDCODE-.LSTARTCODE # Length of the code. - .uleb128 8 # Augmentation size - .quad .LexceptSTART -#endif - .byte 4 # DW_CFA_advance_loc4 - .long .Lpush_rsi-.LSTARTCODE - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16 - .byte 4 # DW_CFA_advance_loc4 - .long .Lpush_rdi-.Lpush_rsi - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 24 - .byte 4 # DW_CFA_advance_loc4 - .long .Lpush_rdi2-.Lpush_rdi - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 32 - .byte 4 # DW_CFA_advance_loc4 - .long .Lpop_rdi-.Lpush_rdi2 - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 24 - .byte 4 # DW_CFA_advance_loc4 - .long .Ladd1-.Lpop_rdi - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16 - .byte 4 # DW_CFA_advance_loc4 - .long .Ladd2-.Ladd1 - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 8 - .byte 4 # DW_CFA_advance_loc4 - .long clear_once_control-.Ladd2 - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 32 -#if 0 - .byte 4 # DW_CFA_advance_loc4 - .long .Lpop_rdi3-clear_once_control - .byte 14 # DW_CFA_def_cfa_offset - .uleb128 16 -#endif - .align 8 -.LENDFDE: - - #ifdef SHARED .hidden DW.ref.__gcc_personality_v0 .weak DW.ref.__gcc_personality_v0 |