6846a68073
atomic_fetchadd_32. Without it gcc would use it as input
register for v and sometimes generate following code for
function call like atomic_fetchadd_32(&(fp)->f_count, -1):
801238b4: 2402ffff li v0,-1
801238b8: c2230018 ll v1,24(s1)
801238bc: 00431021 addu v0,v0,v1
801238c0: e2220018 sc v0,24(s1)
801238c4: 1040fffc beqz v0,801238b8 <dupfdopen+0x2e8>
801238c8: 00000000 nop
Which is definitly wrong because if sc fails v0 is set to 0
and previous value of -1 is overriden hence whole operation
turns to bogus
|
||
|---|---|---|
| .. | ||
| _bus_octeon.h | ||
| _bus.h | ||
| _inttypes.h | ||
| _limits.h | ||
| _stdint.h | ||
| _types.h | ||
| archtype.h | ||
| asm.h | ||
| asmacros.h | ||
| atomic.h | ||
| bootinfo.h | ||
| bswap.h | ||
| bus_dma.h | ||
| bus.h | ||
| cache_mipsNN.h | ||
| cache_r4k.h | ||
| cache.h | ||
| clock.h | ||
| clockvar.h | ||
| cpu.h | ||
| cpufunc.h | ||
| cpuinfo.h | ||
| cpuregs.h | ||
| cputypes.h | ||
| db_machdep.h | ||
| defs.h | ||
| elf.h | ||
| endian.h | ||
| exec.h | ||
| float.h | ||
| floatingpoint.h | ||
| fpu.h | ||
| frame.h | ||
| gdb_machdep.h | ||
| hwfunc.h | ||
| ieee.h | ||
| ieeefp.h | ||
| in_cksum.h | ||
| intr_machdep.h | ||
| iodev.h | ||
| kdb.h | ||
| limits.h | ||
| locore.h | ||
| md_var.h | ||
| memdev.h | ||
| metadata.h | ||
| minidump.h | ||
| mips_opcode.h | ||
| mp_watchdog.h | ||
| mutex.h | ||
| param.h | ||
| pcb.h | ||
| pci_cfgreg.h | ||
| pcpu.h | ||
| pltfm.h | ||
| pmap.h | ||
| pmc_mdep.h | ||
| ppireg.h | ||
| proc.h | ||
| profile.h | ||
| psl.h | ||
| pte.h | ||
| ptrace.h | ||
| queue.h | ||
| reg.h | ||
| regdef.h | ||
| regnum.h | ||
| reloc.h | ||
| resource.h | ||
| rm7000.h | ||
| runq.h | ||
| segments.h | ||
| setjmp.h | ||
| sf_buf.h | ||
| sigframe.h | ||
| signal.h | ||
| smp.h | ||
| stdarg.h | ||
| sysarch.h | ||
| timerreg.h | ||
| trap.h | ||
| ucontext.h | ||
| varargs.h | ||
| vmparam.h | ||