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Commit eba91727 authored by Thibaut Varene's avatar Thibaut Varene Committed by Kyle McMartin
Browse files

[PARISC] Add printing of fpregs state to stack dump 



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

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

Signed-off-by: default avatarKyle McMartin <kyle@parisc-linux.org>
parent 74d13f84

arch/parisc/kernel/traps.c

+31 −6
Original line number Diff line number Diff line
@@ -74,6 +74,9 @@ 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;
@@ -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);