Author: jhb Date: Fri Jan 17 19:01:59 2020 New Revision: 356839 URL: https://svnweb.freebsd.org/changeset/base/356839
Log: Save and restore floating point registers in get/set_mcontext(). arm64 and riscv were only saving and restoring floating point registers for sendsig() and sys_sigreturn(), but not for getcontext(), setcontext(), and swapcontext(). While here, remove an always-false check for uap being NULL from sys_sigreturn(). Reviewed by: br, mhorne Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D23218 Modified: head/sys/arm64/arm64/machdep.c head/sys/riscv/riscv/machdep.c Modified: head/sys/arm64/arm64/machdep.c ============================================================================== --- head/sys/arm64/arm64/machdep.c Fri Jan 17 17:57:34 2020 (r356838) +++ head/sys/arm64/arm64/machdep.c Fri Jan 17 19:01:59 2020 (r356839) @@ -98,6 +98,8 @@ __FBSDID("$FreeBSD$"); #include <dev/ofw/openfirm.h> #endif +static void get_fpcontext(struct thread *td, mcontext_t *mcp); +static void set_fpcontext(struct thread *td, mcontext_t *mcp); enum arm64_bus arm64_bus_method = ARM64_BUS_NONE; @@ -473,6 +475,7 @@ get_mcontext(struct thread *td, mcontext_t *mcp, int c mcp->mc_gpregs.gp_sp = tf->tf_sp; mcp->mc_gpregs.gp_lr = tf->tf_lr; mcp->mc_gpregs.gp_elr = tf->tf_elr; + get_fpcontext(td, mcp); return (0); } @@ -495,6 +498,7 @@ set_mcontext(struct thread *td, mcontext_t *mcp) tf->tf_lr = mcp->mc_gpregs.gp_lr; tf->tf_elr = mcp->mc_gpregs.gp_elr; tf->tf_spsr = mcp->mc_gpregs.gp_spsr; + set_fpcontext(td, mcp); return (0); } @@ -667,15 +671,12 @@ sys_sigreturn(struct thread *td, struct sigreturn_args ucontext_t uc; int error; - if (uap == NULL) - return (EFAULT); if (copyin(uap->sigcntxp, &uc, sizeof(uc))) return (EFAULT); error = set_mcontext(td, &uc.uc_mcontext); if (error != 0) return (error); - set_fpcontext(td, &uc.uc_mcontext); /* Restore signal mask. */ kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); @@ -747,7 +748,6 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask /* Fill in the frame to copy out */ bzero(&frame, sizeof(frame)); get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); - get_fpcontext(td, &frame.sf_uc.uc_mcontext); frame.sf_si = ksi->ksi_info; frame.sf_uc.uc_sigmask = *mask; frame.sf_uc.uc_stack = td->td_sigstk; Modified: head/sys/riscv/riscv/machdep.c ============================================================================== --- head/sys/riscv/riscv/machdep.c Fri Jan 17 17:57:34 2020 (r356838) +++ head/sys/riscv/riscv/machdep.c Fri Jan 17 19:01:59 2020 (r356839) @@ -99,6 +99,9 @@ __FBSDID("$FreeBSD$"); #include <dev/ofw/openfirm.h> #endif +static void get_fpcontext(struct thread *td, mcontext_t *mcp); +static void set_fpcontext(struct thread *td, mcontext_t *mcp); + struct pcpu __pcpu[MAXCPU]; static struct trapframe proc0_tf; @@ -352,6 +355,7 @@ get_mcontext(struct thread *td, mcontext_t *mcp, int c mcp->mc_gpregs.gp_tp = tf->tf_tp; mcp->mc_gpregs.gp_sepc = tf->tf_sepc; mcp->mc_gpregs.gp_sstatus = tf->tf_sstatus; + get_fpcontext(td, mcp); return (0); } @@ -372,6 +376,7 @@ set_mcontext(struct thread *td, mcontext_t *mcp) tf->tf_gp = mcp->mc_gpregs.gp_gp; tf->tf_sepc = mcp->mc_gpregs.gp_sepc; tf->tf_sstatus = mcp->mc_gpregs.gp_sstatus; + set_fpcontext(td, mcp); return (0); } @@ -522,8 +527,6 @@ sys_sigreturn(struct thread *td, struct sigreturn_args ucontext_t uc; int error; - if (uap == NULL) - return (EFAULT); if (copyin(uap->sigcntxp, &uc, sizeof(uc))) return (EFAULT); @@ -540,8 +543,6 @@ sys_sigreturn(struct thread *td, struct sigreturn_args if (error != 0) return (error); - set_fpcontext(td, &uc.uc_mcontext); - /* Restore signal mask. */ kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); @@ -612,7 +613,6 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask /* Fill in the frame to copy out */ bzero(&frame, sizeof(frame)); get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); - get_fpcontext(td, &frame.sf_uc.uc_mcontext); frame.sf_si = ksi->ksi_info; frame.sf_uc.uc_sigmask = *mask; frame.sf_uc.uc_stack = td->td_sigstk; _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
