George Koehler 1dfd5524e4 In PowerPC top, don't delete addi r0, r0, 0 ... Also don't delete addis r0, r0, 0. These instructions are special cases that set r0 to zero. If we delete them, then r0 keeps its old value. I caught this bug because osxppc protects the .text segment against writing. (linuxppc doesn't protect it.) A program tried to set r0 to the NULL pointer, but top deleted the instruction, so r0 kept an old return address pointing into .text. Later the program checked that r0 wasn't NULL, tried to write to address r0, and crashed.		2017-01-26 12:44:32 -05:00
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as	Teach the assembler about PowerPC extended mnemonics.	2017-01-21 23:49:29 -05:00
libem	In PowerPC libem, remove tge.s and powerpc.h	2017-01-26 12:39:16 -05:00
libend	Mostly add support for the experimental and largely broken linuxppc platform.	2016-09-15 23:12:03 +02:00
mcg	Use a better NOT; and after remembering that PowerPC bit numbers are all	2017-01-07 01:03:15 +01:00
ncg	Rewrite how PowerPC ncg does conditional branches and tests.	2017-01-25 19:08:55 -05:00
top	In PowerPC top, don't delete addi r0, r0, 0	2017-01-26 12:44:32 -05:00