diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/vectors/vectors.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/vectors/vectors.S | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/vectors/vectors.S b/c/src/lib/libbsp/powerpc/shared/vectors/vectors.S index 692c1259c2..7ba2fe408d 100644 --- a/c/src/lib/libbsp/powerpc/shared/vectors/vectors.S +++ b/c/src/lib/libbsp/powerpc/shared/vectors/vectors.S @@ -40,9 +40,12 @@ SYM (default_exception_vector_code_prolog): */ stwu r1, - (EXCEPTION_FRAME_END)(r1) stw r3, GPR3_OFFSET(r1) + /* R2 should never change (EABI: pointer to .sdata2) - we + * save it nevertheless.. + */ stw r2, GPR2_OFFSET(r1) - mflr r2 - stw r2, EXC_LR_OFFSET(r1) + mflr r3 + stw r3, EXC_LR_OFFSET(r1) bl 0f 0: /* * r3 = exception vector entry point @@ -64,8 +67,8 @@ PUBLIC_VAR (push_normalized_frame) SYM (push_normalized_frame): stw r3, EXCEPTION_NUMBER_OFFSET(r1) stw r0, GPR0_OFFSET(r1) - mfsrr0 r2 - stw r2, SRR0_FRAME_OFFSET(r1) + mfsrr0 r3 + stw r3, SRR0_FRAME_OFFSET(r1) mfsrr1 r3 stw r3, SRR1_FRAME_OFFSET(r1) /* @@ -89,14 +92,14 @@ SYM (push_normalized_frame): stw r28, EXC_MSR_OFFSET(r1) mfdar r28 stw r28, EXC_DAR_OFFSET(r1) - /* - * compute SP at exception entry - */ - addi r2, r1, EXCEPTION_FRAME_END - /* - * store it at the right place - */ - stw r2, GPR1_OFFSET(r1) + /* + * compute SP at exception entry + */ + addi r3, r1, EXCEPTION_FRAME_END + /* + * store it at the right place + */ + stw r3, GPR1_OFFSET(r1) /* * Enable data and instruction address translation, exception nesting */ |