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Re: [RFA] Sparc libjava support update
From: Andrew Haley <aph@redhat.com>
Date: Sun, 21 Apr 2002 12:01:33 +0100 (BST)
What is the magic insn? Why does it cause regp to be off by one?
Is this what you want?
2002-04-21 David S. Miller <davem@redhat.com>
* include/dwarf2-signal.h (MAKE_THROW_FRAME, sparc32): Document
magic instruction reading sequence.
--- include/dwarf2-signal.h.~1~ Fri Apr 19 13:48:37 2002
+++ include/dwarf2-signal.h Sun Apr 21 04:01:38 2002
@@ -77,9 +77,11 @@
} *regp; \
unsigned int insn; \
__asm__ __volatile__("ld [%%i7 + 8], %0" : "=r" (insn)); \
+ /* mov __NR_sigaction, %g1; Old signal stack layout */ \
if (insn == 0x821020d8) \
regp = (struct sig_regs *) _sip; \
else \
+ /* mov __NR_rt_sigaction, %g1; New signal stack layout */ \
regp = (struct sig_regs *) (_sip + 1); \
regp->pc = regp->npc; \
regp->npc += 4; \