Date: Tue, 24 May 2005 21:17:12 GMT From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 77413 for review Message-ID: <200505242117.j4OLHCZl094817@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=77413 Change 77413 by peter@peter_melody on 2005/05/24 21:16:11 flesh out set_regs32(). This might be complete. Affected files ... .. //depot/projects/hammer/sys/amd64/ia32/ia32_reg.c#3 edit Differences ... ==== //depot/projects/hammer/sys/amd64/ia32/ia32_reg.c#3 (text+ko) ==== @@ -44,6 +44,9 @@ #include <machine/pcb.h> #include <machine/cpufunc.h> +#define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) +#define EFL_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) + int fill_regs32(struct thread *td, struct reg32 *regs) { @@ -74,8 +77,34 @@ int set_regs32(struct thread *td, struct reg32 *regs) { + struct pcb *pcb; + struct trapframe *tp; - return (ENOSYS); + tp = td->td_frame; + if (!EFL_SECURE(regs->r_eflags, tp->tf_rflags) || !CS_SECURE(regs->r_cs)) + return (EINVAL); + pcb = td->td_pcb; + load_fs(regs->r_fs); + pcb->pcb_fs = regs->r_fs; + load_es(regs->r_es); + pcb->pcb_es = regs->r_es; + load_ds(regs->r_ds); + pcb->pcb_ds = regs->r_ds; + tp->tf_rdi = regs->r_edi; + tp->tf_rsi = regs->r_esi; + tp->tf_rbp = regs->r_ebp; + tp->tf_rbx = regs->r_ebx; + tp->tf_rdx = regs->r_edx; + tp->tf_rcx = regs->r_ecx; + tp->tf_rax = regs->r_eax; + tp->tf_rip = regs->r_eip; + tp->tf_cs = regs->r_cs; + tp->tf_rflags = regs->r_eflags; + tp->tf_rsp = regs->r_esp; + tp->tf_ss = regs->r_ss; + load_gs(regs->r_gs); + pcb->pcb_gs = regs->r_gs; + return (0); } int
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