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[PARISC] Add printing of fpregs state to stack dump

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We're using fp regs now in the kernel, so we want to print them
on stack dump

Signed-off-by: Thibaut VARENE <varenet@parisc-linux.org>

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Thibaut Varene 2005-10-21 22:49:25 -04:00 committed by Kyle McMartin
parent 74d13f84a9
commit eba917273e
1 changed files with 31 additions and 6 deletions
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37
arch/parisc/kernel/traps.c
View file

@ -74,7 +74,10 @@ void show_regs(struct pt_regs *regs)
char *level;
unsigned long cr30;
unsigned long cr31;
/* carlos says that gcc understands better memory in a struct,
* and it makes our life easier with fpregs -- T-Bone */
struct { u32 sw[2]; } s;
level = user_mode(regs) ? KERN_DEBUG : KERN_CRIT;
printk("%s\n", level); /* don't want to have that pretty register dump messed up */
@ -103,11 +106,33 @@ void show_regs(struct pt_regs *regs)
printk("%s\n", buf);
}
#if RIDICULOUSLY_VERBOSE
for (i = 0; i < 32; i += 2)
printk("%sFR%02d : %016lx FR%2d : %016lx", level, i,
regs->fr[i], i+1, regs->fr[i+1]);
#endif
/* FR are 64bit everywhere. Need to use asm to get the content
* of fpsr/fper1, and we assume that we won't have a FP Identify
* in our way, otherwise we're screwed.
* The fldd is used to restore the T-bit if there was one, as the
* store clears it anyway.
* BTW, PA2.0 book says "thou shall not use fstw on FPSR/FPERs". */
__asm__ (
"fstd %%fr0,0(%1) \n\t"
"fldd 0(%1),%%fr0 \n\t"
: "=m" (s) : "r" (&s) : "%r0"
);
printk("%s\n", level);
printk("%s VZOUICununcqcqcqcqcqcrmunTDVZOUI\n", level);
printbinary(buf, s.sw[0], 32);
printk("%sFPSR: %s\n", level, buf);
printk("%sFPER1: %08x\n", level, s.sw[1]);
/* here we'll print fr0 again, tho it'll be meaningless */
for (i = 0; i < 32; i += 4) {
int j;
p = buf;
p += sprintf(p, "%sfr%02d-%02d ", level, i, i + 3);
for (j = 0; j < 4; j++)
p += sprintf(p, " %016llx", (i+j) == 0 ? 0 : regs->fr[i+j]);
printk("%s\n", buf);
}
cr30 = mfctl(30);
cr31 = mfctl(31);