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Update. 

2003-07-01  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/x86_64/pthread_once.S: Add correct
	cleanup support and unwind info.
This commit is contained in:
Ulrich Drepper 2003-07-01 17:02:15 +00:00
parent b5d5b67be3
commit 3b985826ca
2 changed files with 137 additions and 19 deletions
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5
nptl/ChangeLog
View File

@ -1,3 +1,8 @@
2003-07-01 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/x86_64/pthread_once.S: Add correct
cleanup support and unwind info.
2003-06-30 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/i386/pthread_once.S (__pthread_once):

151
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S
View File

@ -35,6 +35,7 @@
.type __pthread_once,@function
.align 16
__pthread_once:
.LSTARTCODE:
testl $2, (%rdi)
jz 1f
xorl %eax, %eax
@ -42,6 +43,7 @@ __pthread_once:
/* Preserve the function pointer. */
1: pushq %rsi
.Lpush_rsi:
xorq %r10, %r10
/* Not yet initialized or initialization in progress.
@ -79,28 +81,15 @@ __pthread_once:
/* Preserve the pointer to the control variable. */
3: pushq %rdi
.Lpush_rdi:
/* Call the initializer function after setting up the
cancellation handler. */
subq $32, %rsp
/* Push the cleanup handler. */
leaq clear_once_control(%rip), %rsi
movq %rdi, %rdx
movq %rsp, %rdi
callq __pthread_cleanup_push /* Note: no @PLT. */
callq *40(%rsp)
/* Pop the cleanup handler. */
movq %rsp, %rdi
xorq %rsi, %rsi
callq __pthread_cleanup_pop /* Note: no @PLT. */
addq $32, %rsp
.LcleanupSTART:
callq *8(%rsp)
.LcleanupEND:
/* Get the control variable address back. */
popq %rdi
.Lpop_rdi:
/* Sucessful run of the initializer. Signal that we are done. */
LOCK
@ -113,6 +102,7 @@ __pthread_once:
syscall
4: addq $8, %rsp
.Ladd:
xorq %rax, %rax
retq
@ -129,6 +119,8 @@ pthread_once = __pthread_once
.type clear_once_control,@function
.align 16
clear_once_control:
movq (%rsp), %rdi
movq %rax, %r8
movl $0, (%rdi)
movl $0x7fffffff, %edx
@ -136,5 +128,126 @@ clear_once_control:
movq $SYS_futex, %rax
syscall
retq
movq %r8, %rdi
.LcallUR:
call _Unwind_Resume@PLT
hlt
.LENDCODE:
.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
.uleb128 .Lcstend-.Lcstbegin
.Lcstbegin:
.uleb128 .LcleanupSTART-.LSTARTCODE
.uleb128 .LcleanupEND-.LcleanupSTART
.uleb128 clear_once_control-.LSTARTCODE
.uleb128 0
.uleb128 .LcallUR-.LSTARTCODE
.uleb128 .LENDCODE-.LcallUR
.uleb128 0
.uleb128 0
.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 .Lpop_rdi-.Lpush_rdi
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 16
.byte 4 # DW_CFA_advance_loc4
.long .Ladd-.Lpop_rdi
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 8
.byte 4 # DW_CFA_advance_loc4
.long clear_once_control-.Ladd
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 24
#if 0
.byte 4 # DW_CFA_advance_loc4
.long .Lpop_rdi2-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
.section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
.align 8
.type DW.ref.__gcc_personality_v0, @object
.size DW.ref.__gcc_personality_v0, 8
DW.ref.__gcc_personality_v0:
.quad __gcc_personality_v0
#endif