diff options
author | 2017-04-25 03:31:15 -0700 | |
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committer | 2017-05-22 06:48:08 +0000 | |
commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/roms/ipxe/src/arch/i386/core/gdbmach.c | |
parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/core/gdbmach.c')
-rw-r--r-- | qemu/roms/ipxe/src/arch/i386/core/gdbmach.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/core/gdbmach.c b/qemu/roms/ipxe/src/arch/i386/core/gdbmach.c deleted file mode 100644 index d92a4ac08..000000000 --- a/qemu/roms/ipxe/src/arch/i386/core/gdbmach.c +++ /dev/null @@ -1,184 +0,0 @@ -/* - * Copyright (C) 2008 Stefan Hajnoczi <stefanha@gmail.com>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stddef.h> -#include <stdio.h> -#include <assert.h> -#include <ipxe/uaccess.h> -#include <ipxe/gdbstub.h> -#include <librm.h> -#include <gdbmach.h> - -/** @file - * - * GDB architecture-specific bits for i386 - * - */ - -enum { - DR7_CLEAR = 0x00000400, /* disable hardware breakpoints */ - DR6_CLEAR = 0xffff0ff0, /* clear breakpoint status */ -}; - -/** Hardware breakpoint, fields stored in x86 bit pattern form */ -struct hwbp { - int type; /* type (1=write watchpoint, 3=access watchpoint) */ - unsigned long addr; /* linear address */ - size_t len; /* length (0=1-byte, 1=2-byte, 3=4-byte) */ - int enabled; -}; - -static struct hwbp hwbps [ 4 ]; -static gdbreg_t dr7 = DR7_CLEAR; - -static struct hwbp *gdbmach_find_hwbp ( int type, unsigned long addr, size_t len ) { - struct hwbp *available = NULL; - unsigned int i; - for ( i = 0; i < sizeof hwbps / sizeof hwbps [ 0 ]; i++ ) { - if ( hwbps [ i ].type == type && hwbps [ i ].addr == addr && hwbps [ i ].len == len ) { - return &hwbps [ i ]; - } - if ( !hwbps [ i ].enabled ) { - available = &hwbps [ i ]; - } - } - return available; -} - -static void gdbmach_commit_hwbp ( struct hwbp *bp ) { - unsigned int regnum = bp - hwbps; - - /* Set breakpoint address */ - assert ( regnum < ( sizeof hwbps / sizeof hwbps [ 0 ] ) ); - switch ( regnum ) { - case 0: - __asm__ __volatile__ ( "movl %0, %%dr0\n" : : "r" ( bp->addr ) ); - break; - case 1: - __asm__ __volatile__ ( "movl %0, %%dr1\n" : : "r" ( bp->addr ) ); - break; - case 2: - __asm__ __volatile__ ( "movl %0, %%dr2\n" : : "r" ( bp->addr ) ); - break; - case 3: - __asm__ __volatile__ ( "movl %0, %%dr3\n" : : "r" ( bp->addr ) ); - break; - } - - /* Set type */ - dr7 &= ~( 0x3 << ( 16 + 4 * regnum ) ); - dr7 |= bp->type << ( 16 + 4 * regnum ); - - /* Set length */ - dr7 &= ~( 0x3 << ( 18 + 4 * regnum ) ); - dr7 |= bp->len << ( 18 + 4 * regnum ); - - /* Set/clear local enable bit */ - dr7 &= ~( 0x3 << 2 * regnum ); - dr7 |= bp->enabled << 2 * regnum; -} - -int gdbmach_set_breakpoint ( int type, unsigned long addr, size_t len, int enable ) { - struct hwbp *bp; - - /* Check and convert breakpoint type to x86 type */ - switch ( type ) { - case GDBMACH_WATCH: - type = 0x1; - break; - case GDBMACH_AWATCH: - type = 0x3; - break; - default: - return 0; /* unsupported breakpoint type */ - } - - /* Only lengths 1, 2, and 4 are supported */ - if ( len != 2 && len != 4 ) { - len = 1; - } - len--; /* convert to x86 breakpoint length bit pattern */ - - /* Calculate linear address by adding segment base */ - addr += virt_offset; - - /* Set up the breakpoint */ - bp = gdbmach_find_hwbp ( type, addr, len ); - if ( !bp ) { - return 0; /* ran out of hardware breakpoints */ - } - bp->type = type; - bp->addr = addr; - bp->len = len; - bp->enabled = enable; - gdbmach_commit_hwbp ( bp ); - return 1; -} - -static void gdbmach_disable_hwbps ( void ) { - /* Store and clear hardware breakpoints */ - __asm__ __volatile__ ( "movl %0, %%dr7\n" : : "r" ( DR7_CLEAR ) ); -} - -static void gdbmach_enable_hwbps ( void ) { - /* Clear breakpoint status register */ - __asm__ __volatile__ ( "movl %0, %%dr6\n" : : "r" ( DR6_CLEAR ) ); - - /* Restore hardware breakpoints */ - __asm__ __volatile__ ( "movl %0, %%dr7\n" : : "r" ( dr7 ) ); -} - -__asmcall void gdbmach_handler ( int signo, gdbreg_t *regs ) { - gdbmach_disable_hwbps(); - gdbstub_handler ( signo, regs ); - gdbmach_enable_hwbps(); -} - -static void * gdbmach_interrupt_vectors[] = { - gdbmach_nocode_sigfpe, /* Divide by zero */ - gdbmach_nocode_sigtrap, /* Debug trap */ - NULL, /* Non-maskable interrupt */ - gdbmach_nocode_sigtrap, /* Breakpoint */ - gdbmach_nocode_sigstkflt, /* Overflow */ - gdbmach_nocode_sigstkflt, /* Bound range exceeded */ - gdbmach_nocode_sigill, /* Invalid opcode */ - NULL, /* Device not available */ - gdbmach_withcode_sigbus, /* Double fault */ - NULL, /* Coprocessor segment overrun */ - gdbmach_withcode_sigsegv, /* Invalid TSS */ - gdbmach_withcode_sigsegv, /* Segment not present */ - gdbmach_withcode_sigsegv, /* Stack segment fault */ - gdbmach_withcode_sigsegv, /* General protection fault */ - gdbmach_withcode_sigsegv, /* Page fault */ -}; - -void gdbmach_init ( void ) { - unsigned int i; - - for ( i = 0 ; i < ( sizeof ( gdbmach_interrupt_vectors ) / - sizeof ( gdbmach_interrupt_vectors[0] ) ) ; i++ ) { - set_interrupt_vector ( i, gdbmach_interrupt_vectors[i] ); - } -} |