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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-03-17 13:30:54 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-03-18 07:43:46 +0100 |
| commit | d64f2e7a852326c5a6f06ec0197d0afae6d5eb2d (patch) | |
| tree | 2bafe21fa7241889c45143d1d27a2d7a37e27861 /c/src/lib/libbsp/sparc/shared/irq_asm.S | |
| parent | bspgetworkarea.c: File header now uses Doxygen (diff) | |
| download | rtems-d64f2e7a852326c5a6f06ec0197d0afae6d5eb2d.tar.bz2 | |
sparc: Fix SMP context switch
The value of register %g1 was overwritten in a delay slot. Use
additional %g4 register.
Bug introduced by 258ad71e9626c16f30b40e06c321326636c976ff.
Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libbsp/sparc/shared/irq_asm.S | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/c/src/lib/libbsp/sparc/shared/irq_asm.S b/c/src/lib/libbsp/sparc/shared/irq_asm.S index 0d70e8b3bf..b7f372c654 100644 --- a/c/src/lib/libbsp/sparc/shared/irq_asm.S +++ b/c/src/lib/libbsp/sparc/shared/irq_asm.S @@ -236,21 +236,21 @@ check_is_executing: ! We may have a new heir ! Read the executing and heir - ld [%g6 + PER_CPU_OFFSET_EXECUTING], %g1 - ld [%g6 + PER_CPU_OFFSET_HEIR], %g2 + ld [%g6 + PER_CPU_OFFSET_EXECUTING], %g2 + ld [%g6 + PER_CPU_OFFSET_HEIR], %g4 ! Update the executing only if necessary to avoid cache line ! monopolization. - cmp %g1, %g2 + cmp %g2, %g4 beq try_update_is_executing mov 1, %g1 ! Calculate the heir context pointer - sub %o1, %g1, %g1 - add %g1, %g2, %o1 + sub %o1, %g2, %g2 + add %g2, %g4, %o1 ! Update the executing - st %g2, [%g6 + PER_CPU_OFFSET_EXECUTING] + st %g4, [%g6 + PER_CPU_OFFSET_EXECUTING] ba try_update_is_executing mov 1, %g1 |