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Simplify TLS support in context switch

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There is no need to save the thread pointer in _CPU_Context_switch()
since it is a thread invariant.  It is initialized once in
_CPU_Context_Initialize().
This commit is contained in:
Sebastian Huber
2017-06-09 07:25:02 +02:00
parent a66accc553
commit 32b4a0c427
3 changed files with 7 additions and 13 deletions
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6
c/src/lib/libbsp/sparc/shared/irq_asm.S
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@@ -59,7 +59,11 @@
PUBLIC(_CPU_Context_switch)
SYM(_CPU_Context_switch):
st %g5, [%o0 + G5_OFFSET] ! save the global registers
st %g7, [%o0 + G7_OFFSET]
/*
* No need to save the thread pointer %g7 since it is a thread
* invariant. It is initialized once in _CPU_Context_Initialize().
*/
std %l0, [%o0 + L0_OFFSET] ! save the local registers
std %l2, [%o0 + L2_OFFSET]

1
c/src/lib/libcpu/powerpc/new-exceptions/cpu_asm.S
View File

@@ -336,7 +336,6 @@ PROC (_CPU_Context_switch):
PPC_GPR_STORE r30, PPC_CONTEXT_OFFSET_GPR30(r3)
PPC_GPR_STORE r31, PPC_CONTEXT_OFFSET_GPR31(r3)
stw r2, PPC_CONTEXT_OFFSET_GPR2(r3)
stw r11, PPC_CONTEXT_OFFSET_ISR_DISPATCH_DISABLE(r3)
#ifdef PPC_MULTILIB_ALTIVEC