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ChangeSet 1.1328, 2005/03/20 11:53:26+00:00, iap10@xxxxxxxxxxxxxxxxxxxx
I added support to Anthony's vm-tools so that it can start VMX enabled
partitions directly (including forking off a copy of the device-model
with the user's environment variables, such as $DISPLAY). For this I
found
it useful to harden xc_vmx_build.c so that it doesn't dump core when
called
incorrectly.
Signed-Off-By: Leendert van Doorn <leendert@xxxxxxxxxxxxxx>
Signed-off-by: ian.pratt@xxxxxxxxxxxx
xc_vmx_build.c | 53 +++++++++++++++++++++++++++++++++++------------------
1 files changed, 35 insertions(+), 18 deletions(-)
diff -Nru a/tools/libxc/xc_vmx_build.c b/tools/libxc/xc_vmx_build.c
--- a/tools/libxc/xc_vmx_build.c 2005-03-20 15:03:14 -05:00
+++ b/tools/libxc/xc_vmx_build.c 2005-03-20 15:03:14 -05:00
@@ -108,7 +108,7 @@
mem_mapp->nr_map = nr_map;
}
-static void zap_mmio_range(int xc_handle, u32 dom,
+static int zap_mmio_range(int xc_handle, u32 dom,
l2_pgentry_t *vl2tab,
unsigned long mmio_range_start,
unsigned long mmio_range_size)
@@ -123,12 +123,17 @@
vl2e = vl2tab[l2_table_offset(mmio_addr)];
vl1tab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
PROT_READ|PROT_WRITE, vl2e >> PAGE_SHIFT);
+ if (vl1tab == 0) {
+ PERROR("Failed zap MMIO range");
+ return -1;
+ }
vl1tab[l1_table_offset(mmio_addr)] = 0;
munmap(vl1tab, PAGE_SIZE);
}
+ return 0;
}
-static void zap_mmio_ranges(int xc_handle, u32 dom,
+static int zap_mmio_ranges(int xc_handle, u32 dom,
unsigned long l2tab,
struct mem_map *mem_mapp)
{
@@ -136,14 +141,17 @@
l2_pgentry_t *vl2tab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
PROT_READ|PROT_WRITE,
l2tab >> PAGE_SHIFT);
+ if (vl2tab == 0)
+ return -1;
for (i = 0; i < mem_mapp->nr_map; i++) {
if ((mem_mapp->map[i].type == E820_IO)
&& (mem_mapp->map[i].caching_attr == MEMMAP_UC))
- zap_mmio_range(xc_handle, dom,
- vl2tab, mem_mapp->map[i].addr,
- mem_mapp->map[i].size);
+ if (zap_mmio_range(xc_handle, dom, vl2tab,
+ mem_mapp->map[i].addr, mem_mapp->map[i].size) == -1)
+ return -1;
}
munmap(vl2tab, PAGE_SIZE);
+ return 0;
}
static int setup_guest(int xc_handle,
@@ -334,9 +342,10 @@
l2tab | MMU_EXTENDED_COMMAND, MMUEXT_PIN_L2_TABLE) )
goto error_out;
- boot_paramsp = xc_map_foreign_range(
- xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
- page_array[(vboot_params_start-dsi.v_start)>>PAGE_SHIFT]);
+ if ((boot_paramsp = xc_map_foreign_range(
+ xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
+ page_array[(vboot_params_start-dsi.v_start)>>PAGE_SHIFT])) == 0)
+ goto error_out;
memset(boot_paramsp, 0, sizeof(*boot_paramsp));
strncpy((char *)boot_paramsp->cmd_line, cmdline, 0x800);
@@ -393,7 +402,8 @@
/* memsize is in megabytes */
build_e820map(mem_mapp, memsize << 20);
- zap_mmio_ranges(xc_handle, dom, l2tab, mem_mapp);
+ if (zap_mmio_ranges(xc_handle, dom, l2tab, mem_mapp) == -1)
+ goto error_out;
boot_paramsp->e820_map_nr = mem_mapp->nr_map;
for (i=0; i<mem_mapp->nr_map; i++) {
boot_paramsp->e820_map[i].addr = mem_mapp->map[i].addr;
@@ -402,9 +412,10 @@
}
munmap(boot_paramsp, PAGE_SIZE);
- boot_gdtp = xc_map_foreign_range(
- xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
- page_array[(vboot_gdt_start-dsi.v_start)>>PAGE_SHIFT]);
+ if ((boot_gdtp = xc_map_foreign_range(
+ xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
+ page_array[(vboot_gdt_start-dsi.v_start)>>PAGE_SHIFT])) == 0)
+ goto error_out;
memset(boot_gdtp, 0, PAGE_SIZE);
boot_gdtp[12*4 + 0] = boot_gdtp[13*4 + 0] = 0xffff; /* limit */
boot_gdtp[12*4 + 1] = boot_gdtp[13*4 + 1] = 0x0000; /* base */
@@ -413,8 +424,10 @@
munmap(boot_gdtp, PAGE_SIZE);
/* shared_info page starts its life empty. */
- shared_info = xc_map_foreign_range(
- xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE, shared_info_frame);
+ if ((shared_info = xc_map_foreign_range(
+ xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
+ shared_info_frame)) == 0)
+ goto error_out;
memset(shared_info, 0, sizeof(shared_info_t));
/* Mask all upcalls... */
for ( i = 0; i < MAX_VIRT_CPUS; i++ )
@@ -720,8 +733,10 @@
for ( done = 0; done < phdr->p_filesz; done += chunksz )
{
pa = (phdr->p_paddr + done) - vstart - LINUX_PAGE_OFFSET;
- va = xc_map_foreign_range(
- xch, dom, PAGE_SIZE, PROT_WRITE, parray[pa>>PAGE_SHIFT]);
+ if ((va = xc_map_foreign_range(
+ xch, dom, PAGE_SIZE, PROT_WRITE,
+ parray[pa>>PAGE_SHIFT])) == 0)
+ return -1;
chunksz = phdr->p_filesz - done;
if ( chunksz > (PAGE_SIZE - (pa & (PAGE_SIZE-1))) )
chunksz = PAGE_SIZE - (pa & (PAGE_SIZE-1));
@@ -733,8 +748,10 @@
for ( ; done < phdr->p_memsz; done += chunksz )
{
pa = (phdr->p_paddr + done) - vstart - LINUX_PAGE_OFFSET;
- va = xc_map_foreign_range(
- xch, dom, PAGE_SIZE, PROT_WRITE, parray[pa>>PAGE_SHIFT]);
+ if ((va = xc_map_foreign_range(
+ xch, dom, PAGE_SIZE, PROT_WRITE,
+ parray[pa>>PAGE_SHIFT])) == 0)
+ return -1;
chunksz = phdr->p_memsz - done;
if ( chunksz > (PAGE_SIZE - (pa & (PAGE_SIZE-1))) )
chunksz = PAGE_SIZE - (pa & (PAGE_SIZE-1));
-------------------------------------------------------
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