diff options
author | Thibaut Varene <varenet@parisc-linux.org> | 2005-10-22 02:49:25 (GMT) |
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committer | Kyle McMartin <kyle@parisc-linux.org> | 2005-10-22 02:49:25 (GMT) |
commit | eba917273eb8579dd8ae36f6645518ca5579a2ab (patch) | |
tree | e2f6e86ea96e42bcfa78661a5d69e4c050218f2c /arch/parisc/kernel/traps.c | |
parent | 74d13f84a9905e02a025d952ced6abb2e064f1c1 (diff) | |
download | linux-eba917273eb8579dd8ae36f6645518ca5579a2ab.tar.xz |
[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.c | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c index d2e5b22..15914f0 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); |