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Code Issues Releases Activity

Futex is an aligned 32-bit integer. Use the proper instruction and

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operand when dereferencing futex pointer.
This commit is contained in:
Dmitry Chagin 2015-06-08 17:39:25 +00:00
parent 6b16d66497
commit c2bc5b15eb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=284159
1 changed files with 24 additions and 24 deletions
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48
sys/amd64/linux/linux_support.s
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@ -45,9 +45,9 @@ ENTRY(futex_xchgl)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
xchgq %rdi,(%rsi)
movq %rdi,(%rdx)
xorq %rax,%rax
xchgl %edi,(%rsi)
movl %edi,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
@ -60,9 +60,9 @@ ENTRY(futex_addl)
#ifdef SMP
lock
#endif
xaddq %rdi,(%rsi)
movq %rdi,(%rdx)
xorq %rax,%rax
xaddl %edi,(%rsi)
movl %edi,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
@ -72,16 +72,16 @@ ENTRY(futex_orl)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
movq (%rsi),%rax
1: movq %rax,%rcx
orq %rdi,%rcx
movl (%rsi),%eax
1: movl %eax,%ecx
orl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgq %rcx,(%rsi)
cmpxchgl %ecx,(%rsi)
jnz 1b
movq %rax,(%rdx)
xorq %rax,%rax
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
@ -91,16 +91,16 @@ ENTRY(futex_andl)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
movq (%rsi),%rax
1: movq %rax,%rcx
andq %rdi,%rcx
movl (%rsi),%eax
1: movl %eax,%ecx
andl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgq %rcx,(%rsi)
cmpxchgl %ecx,(%rsi)
jnz 1b
movq %rax,(%rdx)
xorq %rax,%rax
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
@ -110,15 +110,15 @@ ENTRY(futex_xorl)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
movq (%rsi),%rax
1: movq %rax,%rcx
xorq %rdi,%rcx
movl (%rsi),%eax
1: movl %eax,%ecx
xorl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgq %rcx,(%rsi)
cmpxchgl %ecx,(%rsi)
jnz 1b
movq %rax,(%rdx)
xorq %rax,%rax
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret