_mcount was doing awful things to its caller's stack frame.
Theoretically, we can get by with 16 bytes less of stack than I now
allocate, but GCC still considers functions that call _mcount to be leaf
functions, so that doesn't work. I think this is close enough; it only adds
one instruction. Is this OK? Do I need a "nop" after the subu? My MIPS
assembly knowledge is not that thorough.
--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer
--- glibc-2.2.3/sysdeps/mips/machine-gmon.h.orig Wed Jul 25 20:09:20 2001
+++ glibc-2.2.3/sysdeps/mips/machine-gmon.h Wed Jul 25 21:14:09 2001
@@ -35,22 +35,23 @@
".set noreorder;" \
".set noat;" \
CPLOAD \
- "sw $4,8($29);" \
- "sw $5,12($29);" \
- "sw $6,16($29);" \
- "sw $7,20($29);" \
- "sw $1,0($29);" \
- "sw $31,4($29);" \
+ "subu $29,$29,40;" \
+ "sw $4,24($29);" \
+ "sw $5,28($29);" \
+ "sw $6,32($29);" \
+ "sw $7,36($29);" \
+ "sw $1,16($29);" \
+ "sw $31,20($29);" \
"move $5,$31;" \
"jal __mcount;" \
"move $4,$1;" \
- "lw $4,8($29);" \
- "lw $5,12($29);" \
- "lw $6,16($29);" \
- "lw $7,20($29);" \
- "lw $31,4($29);" \
- "lw $1,0($29);" \
- "addu $29,$29,8;" \
+ "lw $4,24($29);" \
+ "lw $5,28($29);" \
+ "lw $6,32($29);" \
+ "lw $7,36($29);" \
+ "lw $31,20($29);" \
+ "lw $1,16($29);" \
+ "addu $29,$29,48;" \
"j $31;" \
"move $31,$1;" \
".set reorder;" \
