1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11 
  12 .file   "trap.s"
  13 
  14 #include <sys/asm_linkage.h>
  15 #include <sys/cpu_asm.h>
  16 
  17 /*
  18  * Create a section into which to place the exception vector, such that we can
  19  * force it to be mapped where it needs to be.  Currently at 0x0, since
  20  * we don't set the high vector bit (SCTLR.V)
  21  *
  22  * Each instruction in the vector jumps to its own address + 24, which is the
  23  * matching entry in exception_table.  We do this to insure that we get
  24  * effectively infinite displacement, which we can't achieve in one
  25  * instruction otherwise (and gas complains).
  26  *
  27  * The handler for each exception type saves a trap frame (struct regs, though
  28  * with some bits unusual) and calls the associated handler from trap_table.
  29  *
  30  * XXX: On CPUs with the security extensions, there are actually 2 additional
  31  * exception vectors: secure, and monitor.  We ignore them.
  32  */
  33 .pushsection ".exception_vector", "ax"
  34         ldr     pc, [pc, #24]
  35         ldr     pc, [pc, #24]
  36         ldr     pc, [pc, #24]
  37         ldr     pc, [pc, #24]
  38         ldr     pc, [pc, #24]
  39         ldr     pc, [pc, #24]
  40         ldr     pc, [pc, #24]

   1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11 
  12 .file   "trap.s"
  13 
  14 #include <sys/asm_linkage.h>
  15 #include <sys/cpu_asm.h>
  16 
  17 /*
  18  * Create a section into which to place the exception vector, such that we can
  19  * force it to be mapped where it needs to be.

  20  *
  21  * Each instruction in the vector jumps to its own address + 24, which is the
  22  * matching entry in exception_table.  We do this to insure that we get
  23  * effectively infinite displacement, which we can't achieve in one
  24  * instruction otherwise (and gas complains).
  25  *
  26  * The handler for each exception type saves a trap frame (struct regs, though
  27  * with some bits unusual) and calls the associated handler from trap_table.
  28  *
  29  * XXX: On CPUs with the security extensions, there are actually 2 additional
  30  * exception vectors: secure, and monitor.  We ignore them.
  31  */
  32 .pushsection ".exception_vector", "ax"
  33         ldr     pc, [pc, #24]
  34         ldr     pc, [pc, #24]
  35         ldr     pc, [pc, #24]
  36         ldr     pc, [pc, #24]
  37         ldr     pc, [pc, #24]
  38         ldr     pc, [pc, #24]
  39         ldr     pc, [pc, #24]