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| author | Warner Losh <imp@bsdimp.com> | 2022-01-24 01:29:53 -0700 |
|---|---|---|
| committer | Warner Losh <imp@bsdimp.com> | 2022-01-28 15:52:38 -0700 |
| commit | 7f96d0a93c9f252fc65b0ad49121a62889ec560e (patch) | |
| tree | 10bee802dc87c32f573f57b99db1a287dc628f9d /bsd-user/arm/signal.c | |
| parent | 224474622e61f24c4b991fca03e32113eaac91cb (diff) | |
| download | focaccia-qemu-7f96d0a93c9f252fc65b0ad49121a62889ec560e.tar.gz focaccia-qemu-7f96d0a93c9f252fc65b0ad49121a62889ec560e.zip | |
bsd-user/arm/signal.c: get_mcontext should zero vfp data
FreeBSD's get_mcontext doesn't return any vfp data. Instead, it zeros out the vfp feilds (and all the spare fields). Impelement this behavior. We're still missing the sysarch(ARM_GET_VFPCONTEXT) syscall, though. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'bsd-user/arm/signal.c')
| -rw-r--r-- | bsd-user/arm/signal.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/bsd-user/arm/signal.c b/bsd-user/arm/signal.c index 9026343b47..2b1dd745d1 100644 --- a/bsd-user/arm/signal.c +++ b/bsd-user/arm/signal.c @@ -109,6 +109,15 @@ abi_long get_mcontext(CPUARMState *env, target_mcontext_t *mcp, int flags) gr[TARGET_REG_LR] = tswap32(env->regs[14]); gr[TARGET_REG_PC] = tswap32(env->regs[15]); + /* + * FreeBSD's get_mcontext doesn't save VFP info, but sets the pointer and + * size to zero. Applications that need the VFP state use + * sysarch(ARM_GET_VFPSTATE) and are expected to adjust mcontext after that. + */ + mcp->mc_vfp_size = 0; + mcp->mc_vfp_ptr = 0; + memset(&mcp->mc_spare, 0, sizeof(mcp->mc_spare)); + return 0; } |