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authorAndreas Schwab <schwab@redhat.com>2009-08-22 02:01:51 -0700
committerUlrich Drepper <drepper@redhat.com>2009-08-22 02:01:51 -0700
commit15efafdf07789322219cc8f938ac758f932fe208 (patch)
tree30e249a3b3fed95c18c78e7bffb260d361f9abb6 /nptl
parent464dc022eb0be4950e2f3a90fe4de6a17dc3d7d7 (diff)
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Add sigstack handling to Linux ____longjmp_chk on powerpc.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/pthread_rwlock_init.c13
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S122
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S138
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S104
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S92
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S89
6 files changed, 547 insertions, 11 deletions
diff --git a/nptl/pthread_rwlock_init.c b/nptl/pthread_rwlock_init.c
index 27f25ac..95d9da4 100644
--- a/nptl/pthread_rwlock_init.c
+++ b/nptl/pthread_rwlock_init.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2007, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -37,13 +37,7 @@ __pthread_rwlock_init (rwlock, attr)
iattr = ((const struct pthread_rwlockattr *) attr) ?: &default_attr;
- rwlock->__data.__lock = 0;
- rwlock->__data.__nr_readers = 0;
- rwlock->__data.__readers_wakeup = 0;
- rwlock->__data.__writer_wakeup = 0;
- rwlock->__data.__nr_readers_queued = 0;
- rwlock->__data.__nr_writers_queued = 0;
- rwlock->__data.__writer = 0;
+ memset (rwlock, '\0', sizeof (*rwlock));
rwlock->__data.__flags
= iattr->lockkind == PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP;
@@ -74,9 +68,6 @@ __pthread_rwlock_init (rwlock, attr)
header.private_futex));
#endif
- rwlock->__data.__pad1 = 0;
- rwlock->__data.__pad2 = 0;
-
return 0;
}
strong_alias (__pthread_rwlock_init, pthread_rwlock_init)
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
index 35eb09c..54a47e1 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
@@ -31,6 +31,127 @@
.align 16
__pthread_rwlock_rdlock:
cfi_startproc
+ movq $NRW_RC, %rax
+ LOCK
+ xaddq %rax, NRW_WORD(%rdi)
+ js .Lundo
+
+.Lagain1:
+ movq $(NRW_WL|NRW_WP), %rcx
+ movq $(NRW_WL|NRW_WW_MASK), %rdx
+ testq %rax, %rcx
+ setnz %cl
+ testq %rax, %rdx
+ setnz %dl
+ orb %cl, %dl
+ jnz .Lwait
+
+ xorl %eax, %eax
+ ret
+
+.Lwait: movq $NRW_WL, %rcx
+ testq %rcx, %rax
+ jz 4f
+
+ movl %fs:TID, %ecx
+ cmpl %ecx, WRITER(%rdi)
+ je .Ldeadlk
+
+4: xorq %r8, %r8
+ movq $NRW_RC, %rdx
+ addq %rdx, %rax
+ movq $(NRW_WL|NRW_AR), %rcx
+ movq $(NRW_WP|NRW_WW_MASK), %rdx
+ testq %rax, %rcx
+ setz %cl
+ testq %rax, %rdx
+ setnz %dl
+ testb %dl, %cl
+ jz 1f
+
+ movq $NRW_RW-NRW_RC, %rdx
+ addq %rax, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain1
+
+ movq $NRW_RC_MASK, %rax
+ testq %rdx, %rax
+ movl $1, %r8d
+ jz .Lwake_waiter
+
+1: xorq %r10, %r10
+ movl $NRW_R_WAKEUP, %r9d
+ movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi
+ xorl PSHARED(%rdi), %esi
+ leaq NRW_WORD+4(%rdi), %rdi
+2: shldq $32, %rax, %rdx
+ movl $__NR_futex, %eax
+ syscall
+ movq -4(%rdi), %rax
+
+5: movq $(NRW_WL|NRW_WP), %rcx
+ movq $(NRW_WL|NRW_WW_MASK), %rdx
+ testq %rax, %rcx
+ setnz %cl
+ testq %rax, %rdx
+ setnz %dl
+ orb %cl, %dl
+ jnz 2b
+
+ testl %r8d, %r8d
+ jz 3f
+
+ movq $NRW_RC-NRW_RW, %rcx
+ addq %rcx, %rdx
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz 5b
+
+3: xorl %eax, %eax
+ ret
+
+.Lwake_waiter:
+ movq %rdx, %r10
+ movl $__NR_futex, %eax
+ movl $(FUTEX_WAKE_BITSET|FUTEX_PRIVATE_FLAG), %esi
+ xorl PSHARED(%rdi), %esi
+ leaq NRW_WORD(%rdi), %rdi
+ movl $1, %edx
+ movl $NRW_W_WAKEUP, %r9d
+ syscall
+ leaq -NRW_WORD(%rdi), %rdi
+ movq %r10, %rdx
+ jmp 1b
+
+.Lundo: movq $-NRW_RC, %rcx
+ movq %rax, %rdx
+ subq %rcx, %rax
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jz .Lret
+
+ movq $NRW_RC_OVFL, %r8
+.Lagain2:
+ testq %r8, %rax
+ jz .Lagain1
+ leaq (%rax,%rcx), %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain2
+
+.Lret: movl $EAGAIN, %eax
+ ret
+
+.Ldeadlk:
+ movq $NRW_RC, %rdx
+ LOCK
+ subq %rdx, NRW_WORD(%rdi)
+
+ movl $EDEADLK, %eax
+ ret
+
+#if 0
xorq %r10, %r10
/* Get the lock. */
@@ -168,6 +289,7 @@ __pthread_rwlock_rdlock:
subq $MUTEX, %rdi
#endif
jmp 13b
+#endif
cfi_endproc
.size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S
index 23b218a..0fb925c 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S
@@ -34,6 +34,143 @@
.align 16
pthread_rwlock_timedrdlock:
cfi_startproc
+ movq %rsi, %r10
+ movq $NRW_RC, %rax
+ LOCK
+ xaddq %rax, NRW_WORD(%rdi)
+ js .Lundo
+
+.Lagain1:
+ movq $(NRW_WL|NRW_WP), %rcx
+ movq $(NRW_WL|NRW_WW_MASK), %rdx
+ testq %rax, %rcx
+ setnz %cl
+ testq %rax, %rdx
+ setnz %dl
+ orb %cl, %dl
+ jnz .Lwait
+
+ xorl %eax, %eax
+ ret
+
+.Lwait: movq $NRW_WL, %rcx
+ testq %rcx, %rax
+ jz 4f
+
+ movl %fs:TID, %ecx
+ cmpl %ecx, WRITER(%rdi)
+ je .Ldeadlk
+
+4: xorq %r8, %r8
+ movq $NRW_RC, %rdx
+ addq %rdx, %rax
+ movq $(NRW_WL|NRW_AR), %rcx
+ movq $(NRW_WP|NRW_WW_MASK), %rdx
+ testq %rax, %rcx
+ setz %cl
+ testq %rax, %rdx
+ setnz %dl
+ testb %dl, %cl
+ jz 1f
+
+ movq $NRW_RW-NRW_RC, %rdx
+ addq %rax, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain1
+
+ movq $NRW_RC_MASK, %rax
+ testq %rdx, %rax
+ movq $NRW_RW-NRW_RC, %r8
+ jz .Lwake_waiter
+
+1: movl $NRW_R_WAKEUP, %r9d
+ leaq NRW_WORD+4(%rdi), %rdi
+2: movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG|FUTEX_CLOCK_REALTIME), %esi
+ xorl PSHARED-(NRW_WORD+4)(%rdi), %esi
+ shldq $32, %rax, %rdx
+ movl $__NR_futex, %eax
+ syscall
+ movl %eax, %esi
+ movq -4(%rdi), %rax
+
+6: movq $(NRW_WL|NRW_WP), %rcx
+ movq $(NRW_WL|NRW_WW_MASK), %rdx
+ testq %rax, %rcx
+ setnz %cl
+ testq %rax, %rdx
+ setnz %dl
+ orb %cl, %dl
+ jz 5f
+
+ cmpl $-EWOULDBLOCK, %esi
+ je 2b
+
+ movq $-NRW_RC, %rdx
+ subq %r8, %rdx
+ addq %rax, %rdx
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz 6b
+
+ negl %esi
+ movl %esi, %eax
+ ret
+
+5: testl %r8d, %r8d
+ jz 3f
+
+ movq $NRW_RC-NRW_RW, %rcx
+ addq %rcx, %rdx
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz 6b
+
+3: xorl %eax, %eax
+ ret
+
+.Lwake_waiter:
+ movq %rdx, %r10
+ movl $__NR_futex, %eax
+ movl $(FUTEX_WAKE_BITSET|FUTEX_PRIVATE_FLAG), %esi
+ xorl PSHARED(%rdi), %esi
+ leaq NRW_WORD(%rdi), %rdi
+ movl $1, %edx
+ movl $NRW_W_WAKEUP, %r9d
+ syscall
+ leaq -NRW_WORD(%rdi), %rdi
+ movq %r10, %rdx
+ jmp 1b
+
+.Lundo: movq $-NRW_RC, %rcx
+ movq %rax, %rdx
+ subq %rcx, %rax
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jz .Lret
+
+ movq $NRW_RC_OVFL, %r8
+.Lagain2:
+ testq %r8, %rax
+ jz .Lagain1
+ leaq (%rax,%rcx), %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain2
+
+.Lret: movl $EAGAIN, %eax
+ ret
+
+.Ldeadlk:
+ movq $NRW_RC, %rdx
+ LOCK
+ subq %rdx, NRW_WORD(%rdi)
+
+ movl $EDEADLK, %eax
+ ret
+
+
+#if 0
pushq %r12
cfi_adjust_cfa_offset(8)
cfi_rel_offset(%r12, 0)
@@ -271,5 +408,6 @@ pthread_rwlock_timedrdlock:
19: movl $EINVAL, %edx
jmp 9b
+#endif
cfi_endproc
.size pthread_rwlock_timedrdlock,.-pthread_rwlock_timedrdlock
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S
index cd867b6..14d7637 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S
@@ -34,6 +34,109 @@
.align 16
pthread_rwlock_timedwrlock:
cfi_startproc
+ movq %rsi, %r10
+ movq NRW_WORD(%rdi), %rax
+.Lagain:
+ movq $(NRW_WW_MASK|NRW_WL|NRW_RC_MASK), %rdx
+ testq %rdx, %rax
+ jnz .Lwait
+
+ // XXX Probably make AR a don't-care for !WP. Unconditionally set it
+ movq $(NRW_AR|NRW_WL), %rdx
+ movq $NRW_WL, %rcx
+ testq $NRW_WP, %rax
+ cmovz %rcx, %rdx
+ orq %rax, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain
+
+ movl %fs:TID, %eax
+ movl %eax, WRITER(%rdi)
+
+ xorl %eax, %eax
+ ret
+
+.Lwait: movq $NRW_WL, %rcx
+ testq %rcx, %rax
+ jz 1f
+
+ movl %fs:TID, %eax
+ cmpl %eax, WRITER(%rdi)
+ je .Ldeadlk
+
+1: leaq NRW_WORD+4(%rdi), %rdi
+
+ movq $NRW_WW, %rdx
+ movq $NRW_WW_MASK, %rcx
+ addq %rax, %rdx
+ testq %rcx, %rdx
+ jz .Lovfl
+
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz .Lagain
+
+ movl $NRW_W_WAKEUP, %r9d
+.Lwait2:
+ movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG|FUTEX_CLOCK_REALTIME), %esi
+ movl $__NR_futex, %eax
+ xorl PSHARED-(NRW_WORD+4)(%rdi), %esi
+ syscall
+ movl %eax, %esi
+ movq -4(%rdi), %rax
+
+.Lagain2:
+ movq $(NRW_WL|NRW_RC_MASK), %rdx
+ movq $(NRW_WL|NRW_AR), %rcx
+ testq %rdx, %rax
+ movq $NRW_AR, %rsi
+ setz %cl
+ andq %rax, %rcx
+ cmpq %rsi, %rcx
+ sete %cl
+ orb %dl, %cl
+ jnz 2f
+
+ cmpl $-EWOULDBLOCK, %esi
+ jne .Lwait2
+
+ movq $-NRW_WW, %rdx
+ addq %rax, %rdx
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz .Lagain2
+
+ negl %esi
+ movl %esi, %eax
+ ret
+
+2: movq $-NRW_WW, %rdx
+ addq %rax, %rdx
+ xorl %ecx, %ecx
+ testq $NRW_WP, %rax
+ cmovz %rcx, %rsi
+ orq %rsi, %rdx
+
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz .Lagain2
+
+ movl %fs:TID, %eax
+ movl %eax, WRITER(%rdi)
+
+ xorl %eax, %eax
+ ret
+
+.Lovfl: movl $EAGAIN, %eax
+ ret
+
+.Ldeadlk:
+ movl $EDEADLK, %eax
+ ret
+
+
+#if 0
pushq %r12
cfi_adjust_cfa_offset(8)
cfi_rel_offset(%r12, 0)
@@ -263,5 +366,6 @@ pthread_rwlock_timedwrlock:
19: movl $EINVAL, %edx
jmp 9b
+#endif
cfi_endproc
.size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S
index 03391d0..1953637 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S
@@ -30,6 +30,97 @@
.align 16
__pthread_rwlock_unlock:
cfi_startproc
+ movq NRW_WORD(%rdi), %rax
+ movq $NRW_WL, %rdx
+ testq %rdx, %rax
+ jnz .Lunlock_writer
+
+.Lagain:
+ movq $-NRW_RC, %rdx
+ addq %rax, %rdx
+ movq $NRW_RC_MASK, %rcx
+ testq %rcx, %rdx
+ jz .Llast_reader
+
+1: LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain
+
+ xorl %eax, %eax
+ ret
+
+.Llast_reader:
+ movq $NRW_WW_MASK, %rcx
+ testq %rax, %rcx
+ jz 1b
+
+ movq $NRW_AR, %rcx
+ xorl %esi, %esi
+ testq $NRW_WP, %rax
+ cmovz %esi, %ecx
+ orq %rcx, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain
+
+.Lwake_writer:
+ movl $1, %edx
+ movl $NRW_W_WAKEUP, %r9d
+.Lwake: movl $(FUTEX_WAKE_BITSET|FUTEX_PRIVATE_FLAG), %esi
+ xorl PSHARED(%rdi), %esi
+ leaq NRW_WORD(%rdi), %rdi
+ movl $__NR_futex, %eax
+ syscall
+
+.Lout: xorl %eax, %eax
+ ret
+
+.Lunlock_writer:
+ movq %rax, %rdx
+ movq $NRW_WW_MASK, %rcx
+ testq %rcx, %rax
+ jz .Lno_writers
+ movq $NRW_RC_MASK, %rcx
+ testq %rcx, %rax
+ jz 2f
+ testq $NRW_WP, %rax
+ jz .Lwake_readers
+
+2: movq $~NRW_WL, %rcx
+ andq %rcx, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lunlock_writer
+ jmp .Lwake_writer
+
+.Lno_writers:
+ movq $~(NRW_WL|NRW_AR), %rcx
+ andq %rcx, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lunlock_writer
+
+ movq $(NRW_RW_MASK|NRW_RC_MASK), %rcx
+ testq %rcx, %rax
+ jz .Lout
+
+ movl $0x7fffffff, %edx
+ movl $NRW_R_WAKEUP, %r9d
+ jmp .Lwake
+
+.Lwake_readers:
+ movq $~NRW_WL, %rcx
+ andq %rcx, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lunlock_writer
+
+ movl $0x7fffffff, %edx
+ movl $NRW_R_WAKEUP, %r9d
+ jmp .Lwake
+
+
+#if 0
/* Get the lock. */
movl $1, %esi
xorl %eax, %eax
@@ -120,6 +211,7 @@ __pthread_rwlock_unlock:
#endif
callq __lll_unlock_wake
jmp 8b
+#endif
cfi_endproc
.size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
index be6b8d8..63fc2df 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
@@ -31,6 +31,94 @@
.align 16
__pthread_rwlock_wrlock:
cfi_startproc
+ movq NRW_WORD(%rdi), %rax
+.Lagain:
+ movq $(NRW_WW_MASK|NRW_WL|NRW_RC_MASK), %rdx
+ testq %rdx, %rax
+ jnz .Lwait
+
+ // XXX Probably make AR a don't-care for !WP. Unconditionally set it
+ movq $(NRW_AR|NRW_WL), %rdx
+ movq $NRW_WL, %rcx
+ testq $NRW_WP, %rax
+ cmovz %rcx, %rdx
+ orq %rax, %rdx
+ LOCK
+ cmpxchgq %rdx, NRW_WORD(%rdi)
+ jnz .Lagain
+
+ movl %fs:TID, %eax
+ movl %eax, WRITER(%rdi)
+
+ xorl %eax, %eax
+ ret
+
+.Lwait: movq $NRW_WL, %rcx
+ testq %rcx, %rax
+ jz 1f
+
+ movl %fs:TID, %eax
+ cmpl %eax, WRITER(%rdi)
+ je .Ldeadlk
+
+1: leaq NRW_WORD+4(%rdi), %rdi
+
+ movq $NRW_WW, %rdx
+ movq $NRW_WW_MASK, %rcx
+ addq %rax, %rdx
+ testq %rcx, %rdx
+ jz .Lovfl
+
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz .Lagain
+
+ xorq %r10, %r10
+ movl $NRW_W_WAKEUP, %r9d
+.Lwait2:
+ movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi
+ movl $__NR_futex, %eax
+ xorl PSHARED-(NRW_WORD+4)(%rdi), %esi
+ syscall
+ movq -4(%rdi), %rax
+
+.Lagain2:
+ movq $(NRW_WL|NRW_RC_MASK), %rdx
+ movq $(NRW_WL|NRW_AR), %rcx
+ testq %rdx, %rax
+ movq $NRW_AR, %rsi
+ setz %cl
+ andq %rax, %rcx
+ cmpq %rsi, %rcx
+ sete %cl
+ orb %dl, %cl
+ jz .Lwait2
+
+ movq $-NRW_WW, %rdx
+ addq %rax, %rdx
+ xorl %ecx, %ecx
+ testq $NRW_WP, %rax
+ cmovz %rcx, %rsi
+ orq %rsi, %rdx
+
+ LOCK
+ cmpxchgq %rdx, -4(%rdi)
+ jnz .Lagain2
+
+ movl %fs:TID, %eax
+ movl %eax, WRITER(%rdi)
+
+ xorl %eax, %eax
+ ret
+
+.Lovfl: movl $EAGAIN, %eax
+ ret
+
+.Ldeadlk:
+ movl $EDEADLK, %eax
+ ret
+
+#if 0
xorq %r10, %r10
/* Get the lock. */
@@ -156,6 +244,7 @@ __pthread_rwlock_wrlock:
subq $MUTEX, %rdi
#endif
jmp 13b
+#endif
cfi_endproc
.size __pthread_rwlock_wrlock,.-__pthread_rwlock_wrlock