/*- * Copyright (C) 2006 Semihalf, Marian Balakowicz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (C) 2001 Benno Rice * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $ */ /*- * Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 TooLs GmbH. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_compat.h" #include "opt_ddb.h" #include "opt_kstack_pages.h" #include "opt_msgbuf.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB extern vm_offset_t ksym_start, ksym_end; #endif #ifdef DEBUG #define debugf(fmt, args...) printf(fmt, ##args) #else #define debugf(fmt, args...) #endif extern unsigned char kernel_text[]; extern unsigned char _etext[]; extern unsigned char _edata[]; extern unsigned char __bss_start[]; extern unsigned char __sbss_start[]; extern unsigned char __sbss_end[]; extern unsigned char _end[]; extern void dcache_enable(void); extern void dcache_inval(void); extern void icache_enable(void); extern void icache_inval(void); struct kva_md_info kmi; struct pcpu __pcpu[MAXCPU]; struct trapframe frame0; int cold = 1; long realmem = 0; long Maxmem = 0; struct bootinfo *bootinfo; char machine[] = "powerpc"; SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); int cacheline_size = 32; SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, CTLFLAG_RD, &cacheline_size, 0, ""); int hw_direct_map = 0; int ppc64 = 0; static void cpu_e500_startup(void *); SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_e500_startup, NULL); void print_kernel_section_addr(void); void print_bootinfo(void); void print_kenv(void); u_int e500_init(u_int32_t, u_int32_t, void *); static void cpu_e500_startup(void *dummy) { int indx, size; /* Initialise the decrementer-based clock. */ decr_init(); /* Good {morning,afternoon,evening,night}. */ cpu_setup(PCPU_GET(cpuid)); printf("real memory = %ld (%ld MB)\n", ptoa(physmem), ptoa(physmem) / 1048576); realmem = physmem; /* Display any holes after the first chunk of extended memory. */ if (bootverbose) { printf("Physical memory chunk(s):\n"); for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { size = phys_avail[indx + 1] - phys_avail[indx]; printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", phys_avail[indx], phys_avail[indx + 1] - 1, size, size / PAGE_SIZE); } } vm_ksubmap_init(&kmi); printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), ptoa(cnt.v_free_count) / 1048576); /* Set up buffers, so they can be used to read disk labels. */ bufinit(); vm_pager_bufferinit(); } static char * kenv_next(char *cp) { if (cp != NULL) { while (*cp != 0) cp++; cp++; if (*cp == 0) cp = NULL; } return (cp); } void print_kenv(void) { int len; char *cp; debugf("loader passed (static) kenv:\n"); if (kern_envp == NULL) { debugf(" no env, null ptr\n"); return; } debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp); len = 0; for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) debugf(" %x %s\n", (u_int32_t)cp, cp); } void print_bootinfo(void) { struct bi_mem_region *mr; struct bi_eth_addr *eth; int i, j; debugf("bootinfo:\n"); if (bootinfo == NULL) { debugf(" no bootinfo, null ptr\n"); return; } debugf(" version = 0x%08x\n", bootinfo->bi_version); debugf(" ccsrbar = 0x%08x\n", bootinfo->bi_bar_base); debugf(" cpu_clk = 0x%08x\n", bootinfo->bi_cpu_clk); debugf(" bus_clk = 0x%08x\n", bootinfo->bi_bus_clk); debugf(" mem regions:\n"); mr = (struct bi_mem_region *)bootinfo->bi_data; for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) debugf(" #%d, base = 0x%08x, size = 0x%08x\n", i, mr->mem_base, mr->mem_size); debugf(" eth addresses:\n"); eth = (struct bi_eth_addr *)mr; for (i = 0; i < bootinfo->bi_eth_addr_no; i++, eth++) { debugf(" #%d, addr = ", i); for (j = 0; j < 6; j++) debugf("%02x ", eth->mac_addr[j]); debugf("\n"); } } void print_kernel_section_addr(void) { debugf("kernel image addresses:\n"); debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text); debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext); debugf(" _edata = 0x%08x\n", (uint32_t)_edata); debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start); debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end); debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start); debugf(" _end = 0x%08x\n", (uint32_t)_end); } struct bi_mem_region * bootinfo_mr(void) { return ((struct bi_mem_region *)bootinfo->bi_data); } struct bi_eth_addr * bootinfo_eth(void) { struct bi_mem_region *mr; struct bi_eth_addr *eth; int i; /* Advance to the eth section */ mr = bootinfo_mr(); for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) ; eth = (struct bi_eth_addr *)mr; return (eth); } u_int e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) { struct pcpu *pc; void *kmdp; vm_offset_t end; uint32_t csr; kmdp = NULL; end = endkernel; /* * Parse metadata and fetch parameters. This must be done as the first * step as we need bootinfo data to at least init the console */ if (mdp != NULL) { preload_metadata = mdp; kmdp = preload_search_by_type("elf kernel"); if (kmdp != NULL) { bootinfo = (struct bootinfo *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_BOOTINFO); boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); #ifdef DDB ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); #endif } } else { /* * We should scream but how? - without CCSR bar (in bootinfo) * cannot even output anything... */ /* * FIXME add return value and handle in the locore so we can * return to the loader maybe? (this seems not very easy to * restore everything as the TLB have all been reprogrammed * in the locore etc...) */ while(1); } /* Initialize TLB1 handling */ tlb1_init(bootinfo->bi_bar_base); /* Reset Time Base */ mttb(0); /* Init params/tunables that can be overridden by the loader. */ init_param1(); /* Start initializing proc0 and thread0. */ proc_linkup(&proc0, &thread0); thread0.td_frame = &frame0; /* Set up per-cpu data and store the pointer in SPR general 0. */ pc = &__pcpu[0]; pcpu_init(pc, 0, sizeof(struct pcpu)); pc->pc_curthread = &thread0; __asm __volatile("mtsprg 0, %0" :: "r"(pc)); /* Initialize system mutexes. */ mutex_init(); /* Initialize the console before printing anything. */ cninit(); /* Print out some debug info... */ debugf("e500_init: console initialized\n"); debugf(" arg1 startkernel = 0x%08x\n", startkernel); debugf(" arg2 endkernel = 0x%08x\n", endkernel); debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp); debugf(" end = 0x%08x\n", (u_int32_t)end); debugf(" boothowto = 0x%08x\n", boothowto); debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA); debugf(" MSR = 0x%08x\n", mfmsr()); debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0)); debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1)); debugf(" BUCSR = 0x%08x\n", mfspr(SPR_BUCSR)); __asm __volatile("msync; isync"); csr = ccsr_read4(OCP85XX_L2CTL); debugf(" L2CTL = 0x%08x\n", csr); print_bootinfo(); print_kernel_section_addr(); print_kenv(); //tlb1_print_entries(); //tlb1_print_tlbentries(); kdb_init(); #ifdef KDB if (boothowto & RB_KDB) kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); #endif /* Initialise platform module */ platform_probe_and_attach(); /* Initialise virtual memory. */ pmap_mmu_install(MMU_TYPE_BOOKE, 0); pmap_bootstrap(startkernel, end); debugf("MSR = 0x%08x\n", mfmsr()); //tlb1_print_entries(); //tlb1_print_tlbentries(); /* Initialize params/tunables that are derived from memsize. */ init_param2(physmem); /* Finish setting up thread0. */ thread0.td_pcb = (struct pcb *) ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - sizeof(struct pcb)) & ~15); bzero((void *)thread0.td_pcb, sizeof(struct pcb)); pc->pc_curpcb = thread0.td_pcb; /* Initialise the message buffer. */ msgbufinit(msgbufp, MSGBUF_SIZE); /* Enable Machine Check interrupt. */ mtmsr(mfmsr() | PSL_ME); isync(); /* Enable D-cache if applicable */ csr = mfspr(SPR_L1CSR0); if ((csr & L1CSR0_DCE) == 0) { dcache_inval(); dcache_enable(); } csr = mfspr(SPR_L1CSR0); if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR0_DCE) == 0) printf("L1 D-cache %sabled\n", (csr & L1CSR0_DCE) ? "en" : "dis"); /* Enable L1 I-cache if applicable. */ csr = mfspr(SPR_L1CSR1); if ((csr & L1CSR1_ICE) == 0) { icache_inval(); icache_enable(); } csr = mfspr(SPR_L1CSR1); if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR1_ICE) == 0) printf("L1 I-cache %sabled\n", (csr & L1CSR1_ICE) ? "en" : "dis"); debugf("e500_init: SP = 0x%08x\n", ((uintptr_t)thread0.td_pcb - 16) & ~15); debugf("e500_init: e\n"); return (((uintptr_t)thread0.td_pcb - 16) & ~15); } #define RES_GRANULE 32 extern uint32_t tlb0_miss_locks[]; /* Initialise a struct pcpu. */ void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) { pcpu->pc_tid_next = TID_MIN; #ifdef SMP uint32_t *ptr; int words_per_gran = RES_GRANULE / sizeof(uint32_t); ptr = &tlb0_miss_locks[cpuid * words_per_gran]; pcpu->pc_booke_tlb_lock = ptr; *ptr = MTX_UNOWNED; *(ptr + 1) = 0; /* recurse counter */ #endif } /* Set set up registers on exec. */ void exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) { struct trapframe *tf; struct ps_strings arginfo; tf = trapframe(td); bzero(tf, sizeof *tf); tf->fixreg[1] = -roundup(-stack + 8, 16); /* * XXX Machine-independent code has already copied arguments and * XXX environment to userland. Get them back here. */ (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); /* * Set up arguments for _start(): * _start(argc, argv, envp, obj, cleanup, ps_strings); * * Notes: * - obj and cleanup are the auxilliary and termination * vectors. They are fixed up by ld.elf_so. * - ps_strings is a NetBSD extention, and will be * ignored by executables which are strictly * compliant with the SVR4 ABI. * * XXX We have to set both regs and retval here due to different * XXX calling convention in trap.c and init_main.c. */ /* * XXX PG: these get overwritten in the syscall return code. * execve() should return EJUSTRETURN, like it does on NetBSD. * Emulate by setting the syscall return value cells. The * registers still have to be set for init's fork trampoline. */ td->td_retval[0] = arginfo.ps_nargvstr; td->td_retval[1] = (register_t)arginfo.ps_argvstr; tf->fixreg[3] = arginfo.ps_nargvstr; tf->fixreg[4] = (register_t)arginfo.ps_argvstr; tf->fixreg[5] = (register_t)arginfo.ps_envstr; tf->fixreg[6] = 0; /* auxillary vector */ tf->fixreg[7] = 0; /* termination vector */ tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ tf->srr0 = entry; tf->srr1 = PSL_USERSET; td->td_pcb->pcb_flags = 0; } int fill_regs(struct thread *td, struct reg *regs) { struct trapframe *tf; tf = td->td_frame; memcpy(regs, tf, sizeof(struct reg)); return (0); } int fill_fpregs(struct thread *td, struct fpreg *fpregs) { return (0); } /* * Flush the D-cache for non-DMA I/O so that the I-cache can * be made coherent later. */ void cpu_flush_dcache(void *ptr, size_t len) { /* TBD */ } /* * Construct a PCB from a trapframe. This is called from kdb_trap() where * we want to start a backtrace from the function that caused us to enter * the debugger. We have the context in the trapframe, but base the trace * on the PCB. The PCB doesn't have to be perfect, as long as it contains * enough for a backtrace. */ void makectx(struct trapframe *tf, struct pcb *pcb) { pcb->pcb_lr = tf->srr0; pcb->pcb_sp = tf->fixreg[1]; } /* * get_mcontext/sendsig helper routine that doesn't touch the * proc lock. */ static int grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) { struct pcb *pcb; pcb = td->td_pcb; memset(mcp, 0, sizeof(mcontext_t)); mcp->mc_vers = _MC_VERSION; mcp->mc_flags = 0; memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); if (flags & GET_MC_CLEAR_RET) { mcp->mc_gpr[3] = 0; mcp->mc_gpr[4] = 0; } /* XXX Altivec context ? */ mcp->mc_len = sizeof(*mcp); return (0); } int get_mcontext(struct thread *td, mcontext_t *mcp, int flags) { int error; error = grab_mcontext(td, mcp, flags); if (error == 0) { PROC_LOCK(curthread->td_proc); mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); PROC_UNLOCK(curthread->td_proc); } return (error); } int set_mcontext(struct thread *td, const mcontext_t *mcp) { struct pcb *pcb; struct trapframe *tf; pcb = td->td_pcb; tf = td->td_frame; if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp)) return (EINVAL); memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); /* XXX Altivec context? */ return (0); } int sigreturn(struct thread *td, struct sigreturn_args *uap) { struct proc *p; ucontext_t uc; int error; CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { CTR1(KTR_SIG, "sigreturn: efault td=%p", td); return (EFAULT); } error = set_mcontext(td, &uc.uc_mcontext); if (error != 0) return (error); p = td->td_proc; PROC_LOCK(p); td->td_sigmask = uc.uc_sigmask; SIG_CANTMASK(td->td_sigmask); signotify(td); PROC_UNLOCK(p); CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); return (EJUSTRETURN); } #ifdef COMPAT_FREEBSD4 int freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) { return sigreturn(td, (struct sigreturn_args *)uap); } #endif /* * cpu_idle * * Set Wait state enable. */ void cpu_idle (int busy) { register_t msr; msr = mfmsr(); #ifdef INVARIANTS if ((msr & PSL_EE) != PSL_EE) { struct thread *td = curthread; printf("td msr %x\n", td->td_md.md_saved_msr); panic("ints disabled in idleproc!"); } #endif #if 0 /* * Freescale E500 core RM section 6.4.1 */ msr = msr | PSL_WE; __asm__(" msync;" " mtmsr %0;" " isync;" "loop: b loop" : /* no output */ : "r" (msr)); #endif } int cpu_idle_wakeup(int cpu) { return (0); } void spinlock_enter(void) { struct thread *td; td = curthread; if (td->td_md.md_spinlock_count == 0) td->td_md.md_saved_msr = intr_disable(); td->td_md.md_spinlock_count++; critical_enter(); } void spinlock_exit(void) { struct thread *td; td = curthread; critical_exit(); td->td_md.md_spinlock_count--; if (td->td_md.md_spinlock_count == 0) intr_restore(td->td_md.md_saved_msr); } /* Shutdown the CPU as much as possible. */ void cpu_halt(void) { mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE)); while (1); } int set_regs(struct thread *td, struct reg *regs) { struct trapframe *tf; tf = td->td_frame; memcpy(tf, regs, sizeof(struct reg)); return (0); } int fill_dbregs(struct thread *td, struct dbreg *dbregs) { /* No debug registers on PowerPC */ return (ENOSYS); } int set_dbregs(struct thread *td, struct dbreg *dbregs) { /* No debug registers on PowerPC */ return (ENOSYS); } int set_fpregs(struct thread *td, struct fpreg *fpregs) { return (0); } int ptrace_set_pc(struct thread *td, unsigned long addr) { struct trapframe *tf; tf = td->td_frame; tf->srr0 = (register_t)addr; return (0); } int ptrace_single_step(struct thread *td) { struct trapframe *tf; tf = td->td_frame; tf->srr1 |= PSL_DE; tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC); return (0); } int ptrace_clear_single_step(struct thread *td) { struct trapframe *tf; tf = td->td_frame; tf->srr1 &= ~PSL_DE; tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC); return (0); } void kdb_cpu_clear_singlestep(void) { register_t r; r = mfspr(SPR_DBCR0); mtspr(SPR_DBCR0, r & ~DBCR0_IC); kdb_frame->srr1 &= ~PSL_DE; } void kdb_cpu_set_singlestep(void) { register_t r; r = mfspr(SPR_DBCR0); mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM); kdb_frame->srr1 |= PSL_DE; } void sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) { struct trapframe *tf; struct sigframe *sfp; struct sigacts *psp; struct sigframe sf; struct thread *td; struct proc *p; int oonstack, rndfsize; int sig, code; td = curthread; p = td->td_proc; PROC_LOCK_ASSERT(p, MA_OWNED); sig = ksi->ksi_signo; code = ksi->ksi_code; psp = p->p_sigacts; mtx_assert(&psp->ps_mtx, MA_OWNED); tf = td->td_frame; oonstack = sigonstack(tf->fixreg[1]); rndfsize = ((sizeof(sf) + 15) / 16) * 16; CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, catcher, sig); /* * Save user context */ memset(&sf, 0, sizeof(sf)); grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); sf.sf_uc.uc_sigmask = *mask; sf.sf_uc.uc_stack = td->td_sigstk; sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; /* * Allocate and validate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size - rndfsize); } else { sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); } /* * Translate the signal if appropriate (Linux emu ?) */ if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; /* * Save the floating-point state, if necessary, then copy it. */ /* XXX */ /* * Set up the registers to return to sigcode. * * r1/sp - sigframe ptr * lr - sig function, dispatched to by blrl in trampoline * r3 - sig number * r4 - SIGINFO ? &siginfo : exception code * r5 - user context * srr0 - trampoline function addr */ tf->lr = (register_t)catcher; tf->fixreg[1] = (register_t)sfp; tf->fixreg[FIRSTARG] = sig; tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; if (SIGISMEMBER(psp->ps_siginfo, sig)) { /* * Signal handler installed with SA_SIGINFO. */ tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; /* * Fill siginfo structure. */ sf.sf_si = ksi->ksi_info; sf.sf_si.si_signo = sig; sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ? tf->cpu.booke.dear : tf->srr0); } else { /* Old FreeBSD-style arguments. */ tf->fixreg[FIRSTARG+1] = code; tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ? tf->cpu.booke.dear : tf->srr0; } mtx_unlock(&psp->ps_mtx); PROC_UNLOCK(p); tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); /* * copy the frame out to userland. */ if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { /* * Process has trashed its stack. Kill it. */ CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); PROC_LOCK(p); sigexit(td, SIGILL); } CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->srr0, tf->fixreg[1]); PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } void bzero(void *buf, size_t len) { caddr_t p; p = buf; while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { *p++ = 0; len--; } while (len >= sizeof(u_long) * 8) { *(u_long*) p = 0; *((u_long*) p + 1) = 0; *((u_long*) p + 2) = 0; *((u_long*) p + 3) = 0; len -= sizeof(u_long) * 8; *((u_long*) p + 4) = 0; *((u_long*) p + 5) = 0; *((u_long*) p + 6) = 0; *((u_long*) p + 7) = 0; p += sizeof(u_long) * 8; } while (len >= sizeof(u_long)) { *(u_long*) p = 0; len -= sizeof(u_long); p += sizeof(u_long); } while (len) { *p++ = 0; len--; } } /* * XXX what is the better/proper place for this routine? */ int mem_valid(vm_offset_t addr, int len) { return (1); }