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authorThibaut Varene <varenet@parisc-linux.org>2005-10-21 22:49:25 -0400
committerKyle McMartin <kyle@parisc-linux.org>2005-10-21 22:49:25 -0400
commiteba917273eb8579dd8ae36f6645518ca5579a2ab (patch)
treee2f6e86ea96e42bcfa78661a5d69e4c050218f2c /arch/parisc/kernel/traps.c
parent[PARISC] Fix compile warning in pci.h (diff)
downloadlinux-dev-eba917273eb8579dd8ae36f6645518ca5579a2ab.tar.xz
linux-dev-eba917273eb8579dd8ae36f6645518ca5579a2ab.zip
[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: Thibaut VARENE <varenet@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'arch/parisc/kernel/traps.c')
-rw-r--r--arch/parisc/kernel/traps.c37
1 files changed, 31 insertions, 6 deletions
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index d2e5b229a2f4..15914f0235a0 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -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);