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| author | Till Straumann <strauman@slac.stanford.edu> | 2008-07-16 22:04:06 +0000 |
|---|---|---|
| committer | Till Straumann <strauman@slac.stanford.edu> | 2008-07-16 22:04:06 +0000 |
| commit | 6ce3f7b7e2bf811fc1bf6914d11d238a5b06e271 (patch) | |
| tree | 762cf6cfb14ba0ac3dbb32e58ab2cf453098a467 /c/src/lib/libcpu | |
| parent | 2008-07-16 Till Straumann <strauman@slac.stanford.edu> (diff) | |
| download | rtems-6ce3f7b7e2bf811fc1bf6914d11d238a5b06e271.tar.bz2 | |
2008-07-16 Till Straumann <strauman@slac.stanford.edu>
* new-exceptions/cpu.c: propagate R2 to all task contexts
even if the ABI is SVR4. Cannot hurt...
Diffstat (limited to 'c/src/lib/libcpu')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/ChangeLog | 5 | ||||
| -rw-r--r-- | c/src/lib/libcpu/powerpc/new-exceptions/cpu.c | 10 |
2 files changed, 13 insertions, 2 deletions
diff --git a/c/src/lib/libcpu/powerpc/ChangeLog b/c/src/lib/libcpu/powerpc/ChangeLog index d003d89059..3c53b7e21e 100644 --- a/c/src/lib/libcpu/powerpc/ChangeLog +++ b/c/src/lib/libcpu/powerpc/ChangeLog @@ -1,5 +1,10 @@ 2008-07-16 Till Straumann <strauman@slac.stanford.edu> + * new-exceptions/cpu.c: propagate R2 to all task contexts + even if the ABI is SVR4. Cannot hurt... + +2008-07-16 Till Straumann <strauman@slac.stanford.edu> + * new-exceptions/cpu.c: use ppc_interrupt_get_disable_mask() to determine which bits to set/clear from _CPU_Context_Initialize(). diff --git a/c/src/lib/libcpu/powerpc/new-exceptions/cpu.c b/c/src/lib/libcpu/powerpc/new-exceptions/cpu.c index c80e1fe1d0..4f1de2114f 100644 --- a/c/src/lib/libcpu/powerpc/new-exceptions/cpu.c +++ b/c/src/lib/libcpu/powerpc/new-exceptions/cpu.c @@ -126,9 +126,15 @@ void _CPU_Context_Initialize( the_context->pc = (uint32_t)entry_point; #if (PPC_ABI == PPC_ABI_SVR4) - { unsigned r13 = 0; - asm volatile ("mr %0, 13" : "=r" ((r13))); + /* + * SVR4 says R2 is for 'system-reserved' use; it cannot hurt to + * propagate R2 to all task contexts. + */ + { uint32_t r2 = 0; + unsigned r13 = 0; + asm volatile ("mr %0,2; mr %1,13" : "=r" ((r2)), "=r" ((r13))); + the_context->gpr2 = r2; the_context->gpr13 = r13; } #elif (PPC_ABI == PPC_ABI_EABI) |