Removed loads of old debugging code and special swi codes used during
earlier stages of the NetBSD/arm32 development. Added support for the architecture defined SWI's. Currently The IMB and IMB-range architecture defined SWI's for the ARM810 are currently recognised. Various comments cleaned up.
This commit is contained in:
mark
parent
cbf4892982
commit
0ecc08d0df
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@ -1,4 +1,4 @@
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/* $NetBSD: syscall.c,v 1.8 1996/10/13 03:05:59 christos Exp $ */
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/* $NetBSD: syscall.c,v 1.9 1996/10/15 03:08:45 mark Exp $ */
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/*
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* Copyright (c) 1994,1995 Mark Brinicombe.
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@ -80,14 +80,14 @@
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/*
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* CONTINUE_AFTER_SYSCALL_BUG is used to determine whether the kernel
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* should continue running following a swi instruction in SVC mode.
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* This was used for debugging.
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* This was used for debugging and can problably be removed altogether
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*/
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#define CONTINUE_AFTER_SYSCALL_BUG
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#ifdef PORTMASTER
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/*#define CONTINUE_AFTER_SYSCALL_BUG*/
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#endif
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extern int pmap_debug_level;
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extern u_int kmodule_size;
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extern u_int kmodule_base;
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u_int arm700bugcount = 0;
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extern int vnodeconsolebug;
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extern int usertraceback;
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@ -114,10 +114,16 @@ extern void pmap_debug __P((int level));
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extern u_int disassemble __P((u_int addr));
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extern void debug_show_all_procs __P((int argc, char *argv[]));
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#ifdef VALIDATE_TRAPFRAME
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#define SYSCALL_SPECIAL_RETURN \
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userret(p, frame->tf_pc, sticks); \
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validate_trapframe(frame, 4); \
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return;
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#else
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#define SYSCALL_SPECIAL_RETURN \
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userret(p, frame->tf_pc, sticks); \
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return;
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#endif /* VALIDATE_TRAPFRAME */
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/*
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* syscall(frame):
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@ -155,15 +161,9 @@ syscall(frame, code)
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printf("The system should now be considered very unstable :-(\n");
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sigexit(curproc, SIGILL);
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/* Not reached */
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/* Not reached */
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(void)splx(s);
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userret(curproc, frame->tf_pc, curproc->p_sticks);
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#ifdef VALIDATE_TRAPFRAME
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validate_trapframe(frame, 4);
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#endif
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return;
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panic("data_abort_handler: How did we get here ?\n");
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#else
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panic("syscall in kernel mode !\n");
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#endif
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@ -182,6 +182,8 @@ syscall(frame, code)
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if ((ReadWord(frame->tf_pc - 4) & 0x0f000000) != 0x0f000000) {
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#ifdef ARM700BUGTRACK
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/* Verbose bug tracking */
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int loop;
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printf("ARM700 just stumbled at 0x%08x\n", frame->tf_pc - 4);
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@ -194,7 +196,7 @@ syscall(frame, code)
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printf("MMU Fault address=%08x status=%08x\n", cpu_faultaddress(), cpu_faultstatus());
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printf("Page table entry for 0x%08x at 0x%08x = 0x%08x\n", frame->tf_pc - 4, vtopte(frame->tf_pc - 4),
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*vtopte(frame->tf_pc - 4));
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#endif
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#endif /* ARM700BUGTRACK */
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frame->tf_pc -= 4;
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++arm700bugcount;
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@ -215,7 +217,7 @@ syscall(frame, code)
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postmortem(frame);
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panic("syscall in non SVC mode !");
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}
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#endif
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#endif /* DIAGNOSTIC */
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/*
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* Enable interrupts if they were enable before the exception.
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@ -231,53 +233,52 @@ syscall(frame, code)
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p = curproc;
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sticks = p->p_sticks;
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p->p_md.md_regs = frame;
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opc = frame->tf_pc;
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params = (caddr_t)&frame->tf_r0;
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regparams = 4;
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if (pmap_debug_level >= -1)
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if (code > 0x00f00000) {
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/*
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* Support for the Architecture defined SWI's in case the
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* processor does not support them.
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*/
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switch (code) {
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case 0x00f00000 : /* IMB */
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case 0x00f00001 : /* IMB_range */
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/* Do nothing as there is no prefetch unit that needs flushing */
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break;
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default:
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/* Undefined so illegal instruction */
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trapsignal(p, SIGILL, ReadWord(frame->tf_pc - 4));
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break;
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}
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userret(p, frame->tf_pc, sticks);
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return;
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}
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if (pmap_debug_level >= -1)
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printf("\x1b[31mSYSCALL\x1b[0m: code=%08x lr=%08x pid=%d\n",
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code, frame->tf_pc, p->p_pid);
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opc = frame->tf_pc;
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params = (caddr_t)&frame->tf_r0;
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regparams = 4;
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nsys = p->p_emul->e_nsysent;
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callp = p->p_emul->e_sysent;
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switch (code) {
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case 0x1002:
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printf((char *)frame->tf_r0, frame->tf_r1, frame->tf_r2, frame->tf_r3);
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SYSCALL_SPECIAL_RETURN;
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break;
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switch (code) {
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/* Nasty development hacks - If only we had a proper debugger */
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case 0x1003:
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printf("%s", (char *)frame->tf_r0);
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SYSCALL_SPECIAL_RETURN;
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break;
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/* case 0x1004:
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if (frame->tf_r0 != 0)
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panic((char *)frame->tf_r0, frame->tf_r1, frame->tf_r2,
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frame->tf_r3);
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panic("SYSCALL 0x1004 panic\n");
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break;*/
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/* case 0x1007:
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pmap_debug(frame->tf_r0);
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SYSCALL_SPECIAL_RETURN;
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break;*/
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#ifdef PORTMASTER
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/*
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* Things only the portmaster ever needs to play with.
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* NOTE: Enabling these options will effectively remove
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* ALL kernel SECURITY and thus ALL system SECURITY.
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*/
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case 0x1008:
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switch (frame->tf_r0) {
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case 0 :
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debug_show_all_procs(frame->tf_r1, (char **)frame->tf_r2);
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break;
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#ifdef FPE
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case 4 :
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fpe_dump_prof();
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break;
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#endif
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case 5 :
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pmap_dump_pvs();
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break;
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case 6:
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WriteWord(frame->tf_r1, frame->tf_r2);
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break;
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@ -296,12 +297,6 @@ syscall(frame, code)
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case 11:
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frame->tf_r0 = ReadShort(frame->tf_r1);
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break;
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case 16:
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pmap_pagedir_dump();
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break;
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/* case 32:
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frame->tf_r0 = pmap_next_phys_page(frame->tf_r1);
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break;*/
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default:
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printf("Unknown SYS_special call (%d)\n", frame->tf_r0);
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break;
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@ -309,44 +304,6 @@ syscall(frame, code)
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SYSCALL_SPECIAL_RETURN;
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break;
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case 0x100a:
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printf("Warning: This syscall is about to be revoked (0x100a)\n");
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frame->tf_r0 = pmap_page_attributes(frame->tf_r0);
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SYSCALL_SPECIAL_RETURN;
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break;
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/*
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case 0x1010:
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frame->tf_r0 = kmodule_base;
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SYSCALL_SPECIAL_RETURN;
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break;
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case 0x1011:
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frame->tf_r0 = kmodule_size;
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SYSCALL_SPECIAL_RETURN;
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break;
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case 0x1012:
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if (frame->tf_r1 < kmodule_size) {
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bcopy((char *)frame->tf_r0, (char *)kmodule_base,
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frame->tf_r1);
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frame->tf_r0 = 0;
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}
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else
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frame->tf_r0 = 1;
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SYSCALL_SPECIAL_RETURN;
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break;
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case 0x1013:
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{
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int (*caller)();
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caller = (void *)frame->tf_r0;
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frame->tf_r0 = (*caller)(printf, install_coproc_handler);
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}
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SYSCALL_SPECIAL_RETURN;
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break;
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*/
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#if NHYDRABUS > 0
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case 0x1014:
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frame->tf_r0 = hydrascratch.physical;
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@ -368,79 +325,30 @@ syscall(frame, code)
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kmem_free(kernel_map, frame->tf_r0, frame->tf_r1);
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SYSCALL_SPECIAL_RETURN;
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break;
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#endif
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#if 0
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case 0x1020:
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vprint(frame->tf_r0, frame->tf_r1);
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SYSCALL_SPECIAL_RETURN;
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break;
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case 0x1021:
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{ struct vnode *vp;
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vp = (struct vp *)frame->tf_r0;
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if (vp->v_numoutput > 0 && vp->v_usecount == 0 && vp->v_writecount == 0) {
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printf("Patching vnode %08x\n", vp);
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vprint(NULL, vp);
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if (--vp->v_numoutput < 0)
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panic("vwakeup: neg numoutput");
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if ((vp->v_flag & VBWAIT) && vp->v_numoutput <= 0) {
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vp->v_flag &= ~VBWAIT;
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wakeup((caddr_t)&vp->v_numoutput);
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}
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#endif /* NHYDRABUS */
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case 0x1029:
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switch (frame->tf_r0) {
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case 0:
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frame->tf_r0 = p->p_uticks;
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break;
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case 1:
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frame->tf_r0 = p->p_sticks;
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break;
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case 2:
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frame->tf_r0 = p->p_iticks;
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break;
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default:
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frame->tf_r0 = -1;
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break;
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}
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SYSCALL_SPECIAL_RETURN;
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}
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break;
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case 0x1022:
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{ struct vnode *vp;
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vp = (struct vp *)frame->tf_r0;
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if (vp->v_numoutput == 0 && vp->v_usecount == 0 && vp->v_writecount == 0) {
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printf("Patching vnode %08x\n", vp);
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vprint(NULL, vp);
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if ((vp->v_flag & VBWAIT) && vp->v_numoutput <= 0) {
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vp->v_flag &= ~VBWAIT;
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wakeup((caddr_t)&vp->v_numoutput);
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}
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}
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SYSCALL_SPECIAL_RETURN;
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}
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break;
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case 0x1023:
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wakeup((caddr_t)frame->tf_r0);
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SYSCALL_SPECIAL_RETURN;
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break;
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/*
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case 0x1024:
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dumpvndbuf((struct vnode *)frame->tf_r0);
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SYSCALL_SPECIAL_RETURN;
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break;
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case 0x1025:
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dumpvncbuf((struct vnode *)frame->tf_r0);
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SYSCALL_SPECIAL_RETURN;
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break;
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*/
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/* case 0x1026:
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vfs_bufstats();
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SYSCALL_SPECIAL_RETURN;
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break;
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*/
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case 0x1027:
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bcopy(frame->tf_r0, frame->tf_r1, sizeof(struct vnode));
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SYSCALL_SPECIAL_RETURN;
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break;
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case 0x1028:
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vnodeconsolebug = frame->tf_r0;
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SYSCALL_SPECIAL_RETURN;
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break;
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#endif
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case 0x102a:
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usertraceback = frame->tf_r0;
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SYSCALL_SPECIAL_RETURN;
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break;
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#ifdef RC7500
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#ifndef CPU_ARM7500
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case 0x102b:
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frame->tf_r0 = vmem_mapdram();
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SYSCALL_SPECIAL_RETURN;
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@ -455,23 +363,30 @@ syscall(frame, code)
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frame->tf_r0 = vmem_cachectl(frame->tf_r0);
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SYSCALL_SPECIAL_RETURN;
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break;
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#endif /* RC7500 */
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#endif /* CPU_ARM7500 */
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#ifdef DDB /* Sometimes I want to enter the debugger outside of the interrupt handler */
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case 0x102e:
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Debugger();
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SYSCALL_SPECIAL_RETURN;
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break;
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#endif /* DDB */
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#endif /* PORTMASTER */
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case SYS_syscall:
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/* Don't to to look in user space, we have it in the the trapframe */
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/* code = fuword(params);*/
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code = ReadWord(params);
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params += sizeof(int);
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regparams -= 1;
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printf("SYS_syscall: code=%d %02x", code, code);
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break;
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case SYS___syscall:
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if (callp != sysent)
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break;
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/* Since this will be a register we look in the trapframe not user land */
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/* code = fuword(params + _QUAD_LOWWORD * sizeof(int));*/
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/* Since this will be a register ... */
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code = ReadWord(params + _QUAD_LOWWORD * sizeof(int));
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params += sizeof(quad_t);
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regparams -= 2;
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@ -496,19 +411,13 @@ syscall(frame, code)
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disassemble(frame->tf_pc-4);
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disassemble(frame->tf_pc);
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disassemble(frame->tf_pc+4);
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#endif
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#endif /* POSTMORTEM */
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pmap_debug(-2);
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}
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argsize = callp->sy_argsize;
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if (argsize > (regparams * sizeof(int)))
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argsize = regparams*sizeof(int);
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/* if (argsize && (error = copyin(params, (caddr_t)args, argsize))) {
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#ifdef SYSCALL_DEBUG
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scdebug_call(p, code, callp->sy_narg, args);
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#endif
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goto bad;
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}*/
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if (argsize)
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bcopy(params, (caddr_t)args, argsize);
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@ -536,10 +445,13 @@ syscall(frame, code)
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switch (error) {
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case 0:
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/*
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* Reinitialize proc pointer `p' as it may be different
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* if this is a child returning from fork syscall.
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*/
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/*
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* Reinitialize proc pointer `p' as it may be different
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* if this is a child returning from fork syscall.
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*
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* XXX fork now returns via the child_return so is this
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* needed ?
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*/
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p = curproc;
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frame->tf_r0 = rval[0];
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frame->tf_r1 = rval[1];
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@ -547,15 +459,15 @@ syscall(frame, code)
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break;
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case ERESTART:
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/*
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* Reconstruct the pc. opc contains the odl pc address which is
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* the instruction after the swi.
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*/
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/*
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* Reconstruct the pc. opc contains the old pc address which is
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* the instruction after the swi.
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*/
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frame->tf_pc = opc - 4;
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break;
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case EJUSTRETURN:
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/* nothing to do */
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/* nothing to do */
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break;
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default:
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@ -569,7 +481,9 @@ syscall(frame, code)
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scdebug_ret(p, code, error, rval[0]);
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#endif
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#ifdef VALIDATE_TRAPFRAME
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validate_trapframe(frame, 4);
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#endif
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userret(p, frame->tf_pc, sticks);
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@ -578,7 +492,9 @@ syscall(frame, code)
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ktrsysret(p->p_tracep, code, error, rval[0]);
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#endif
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#ifdef VALIDATE_TRAPFRAME
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validate_trapframe(frame, 4);
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#endif
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}
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|
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