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Treat synchronous VFP exception just like aynchronous: as an FP exception,

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not as illegal instruction
This commit is contained in:
Oleksandr Tymoshenko 2015-11-01 21:59:56 +00:00
parent bb3d23fd35
commit 0265aa0a15
2 changed files with 3 additions and 2 deletions
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4
sys/arm/arm/vfp.c
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@ -179,12 +179,12 @@ vfp_bounce(u_int addr, u_int insn, struct trapframe *frame, int code)
fpexc = fmrx(fpexc);
if (fpexc & VFPEXC_EN) {
/* Clear any exceptions */
fmxr(fpexc, fpexc & ~(VFPEXC_EX | VFPEXC_FP2V));
fmxr(fpexc, fpexc & ~(VFPEXC_EX | VFPEXC_DEX | VFPEXC_FP2V));
/* kill the process - we do not handle emulation */
critical_exit();
if (fpexc & VFPEXC_EX) {
if (fpexc & (VFPEXC_EX | VFPEXC_DEX)) {
/* We have an exception, signal a SIGFPE */
ksiginfo_init_trap(&ksi);
ksi.ksi_signo = SIGFPE;

1
sys/arm/include/vfp.h
View File

@ -92,6 +92,7 @@
/* VFPEXC */
#define VFPEXC_EX (0x80000000) /* exception v1 v2 */
#define VFPEXC_EN (0x40000000) /* vfp enable */
#define VFPEXC_DEX (0x20000000) /* Synchronous exception */
#define VFPEXC_FP2V (0x10000000) /* FPINST2 valid */
#define VFPEXC_INV (0x00000080) /* Input exception */
#define VFPEXC_UFC (0x00000008) /* Underflow exception */