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- Add some ASM stuff needed for futexes (linuxolator).

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Sponsored by:	Google SoC 2006
Submitted by:	rdivacky
With help from:	kib
This commit is contained in:
Alexander Leidinger 2006-08-15 12:14:36 +00:00
parent 993182e57c
commit fb5592c084
1 changed files with 111 additions and 0 deletions
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111
sys/i386/i386/support.s
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@ -1522,6 +1522,12 @@ ENTRY(longjmp)
bbhead:
.long 0
#if defined(SMP) || !defined(_KERNEL)
#define MPLOCKED lock ;
#else
#define MPLOCKED
#endif
.text
NON_GPROF_ENTRY(__bb_init_func)
movl 4(%esp),%eax
@ -1530,3 +1536,108 @@ NON_GPROF_ENTRY(__bb_init_func)
movl %edx,16(%eax)
movl %eax,bbhead
NON_GPROF_RET
/* necessary for linux_futex support */
.text
futex_fault:
movl PCPU(CURPCB), %edx
movl $0, PCB_ONFAULT(%edx)
movl $-EFAULT, %eax
ret
/* int futex_xchgl(int oparg, caddr_t uaddr, int *oldval); */
.globl futex_xchgl
futex_xchgl:
movl PCPU(CURPCB), %eax
movl $futex_fault, PCB_ONFAULT(%eax)
movl 4(%esp), %eax
movl 8(%esp), %edx
cmpl $VM_MAXUSER_ADDRESS,%edx
ja futex_fault
MPLOCKED xchgl %eax, (%edx)
movl 0xc(%esp), %edx
movl %eax, (%edx)
xorl %eax, %eax
movl PCPU(CURPCB), %edx
movl $0, PCB_ONFAULT(%edx)
ret
/* int futex_addl(int oparg, caddr_t uaddr, int *oldval); */
.globl futex_addl
futex_addl:
movl PCPU(CURPCB), %eax
movl $futex_fault, PCB_ONFAULT(%eax)
movl 4(%esp), %eax
movl 8(%esp), %edx
cmpl $VM_MAXUSER_ADDRESS,%edx
ja futex_fault
MPLOCKED xaddl %eax, (%edx)
movl 0xc(%esp), %edx
movl %eax, (%edx)
xorl %eax, %eax
movl PCPU(CURPCB), %edx
movl $0, PCB_ONFAULT(%edx)
ret
/* int futex_orl(int oparg, caddr_t uaddr, int *oldval); */
.globl futex_orl
futex_orl:
movl PCPU(CURPCB), %eax
movl $futex_fault, PCB_ONFAULT(%eax)
movl 4(%esp), %eax
movl 8(%esp), %edx
cmpl $VM_MAXUSER_ADDRESS,%edx
ja futex_fault
MPLOCKED orl %eax, (%edx)
movl 0xc(%esp), %edx
movl %eax, (%edx)
xorl %eax, %eax
movl PCPU(CURPCB), %edx
movl $0, PCB_ONFAULT(%edx)
ret
/* int futex_andnl(int oparg, caddr_t uaddr, int *oldval); */
.globl futex_andnl
futex_andnl:
movl PCPU(CURPCB), %eax
movl $futex_fault, PCB_ONFAULT(%eax)
movl 4(%esp), %eax
movl 8(%esp), %edx
cmpl $VM_MAXUSER_ADDRESS,%edx
ja futex_fault
notl (%edx)
MPLOCKED andl %eax, (%edx)
movl 0xc(%esp), %edx
movl %eax, (%edx)
xorl %eax, %eax
movl PCPU(CURPCB), %edx
movl $0, PCB_ONFAULT(%edx)
ret
/* int futex_xorl(int oparg, caddr_t uaddr, int *oldval); */
.globl futex_xorl
futex_xorl:
movl PCPU(CURPCB), %eax
movl $futex_fault, PCB_ONFAULT(%eax)
movl 4(%esp), %eax
movl 8(%esp), %edx
cmpl $VM_MAXUSER_ADDRESS,%edx
ja futex_fault
MPLOCKED xorl %eax, (%edx)
movl 0xc(%esp), %edx
movl %eax, (%edx)
xorl %eax, %eax
movl PCPU(CURPCB), %edx
movl $0, PCB_ONFAULT(%edx)
ret