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authorDamien Zammit <damien@zamaudio.com>2019-05-19 20:33:21 +1000
committerDamien Zammit <damien@zamaudio.com>2019-07-12 20:59:50 +1000
commitf834c15afb49aa340c44374c6e00ef303b076ace (patch)
treedc0294476eaaf19420ed7d1b1f3b3b487efda33a /src
parent1d71669e577f5f2eb02542851696d3bcb722a80b (diff)
x86: Use MAP_SHARED for memory/rom region mmap && fix mode
Diffstat (limited to 'src')
-rw-r--r--src/x86_pci.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/src/x86_pci.c b/src/x86_pci.c
index 786ee3c..e61f6f5 100644
--- a/src/x86_pci.c
+++ b/src/x86_pci.c
@@ -445,7 +445,7 @@ pci_device_x86_read_rom(struct pci_device *dev, void *buffer)
if (memfd == -1)
return errno;
- bios = mmap(NULL, dev->rom_size, PROT_READ, 0, memfd, d->rom_base);
+ bios = mmap(NULL, dev->rom_size, PROT_READ, MAP_SHARED, memfd, d->rom_base);
if (bios == MAP_FAILED) {
close(memfd);
return errno;
@@ -594,12 +594,12 @@ pci_device_x86_region_probe (struct pci_device *dev, int reg_num)
}
/* Map the region in our space */
- memfd = open ("/dev/mem", O_RDONLY | O_CLOEXEC);
+ memfd = open ("/dev/mem", O_RDWR | O_CLOEXEC);
if (memfd == -1)
return errno;
dev->regions[reg_num].memory =
- mmap (NULL, dev->regions[reg_num].size, PROT_READ | PROT_WRITE, 0,
+ mmap (NULL, dev->regions[reg_num].size, PROT_READ | PROT_WRITE, MAP_SHARED,
memfd, dev->regions[reg_num].base_addr);
if (dev->regions[reg_num].memory == MAP_FAILED)
{
@@ -607,8 +607,6 @@ pci_device_x86_region_probe (struct pci_device *dev, int reg_num)
close (memfd);
return errno;
}
-
- close (memfd);
}
return 0;
@@ -857,10 +855,10 @@ pci_device_x86_map_range(struct pci_device *dev,
prot |= PROT_WRITE;
map->memory = mmap(NULL, map->size, prot, MAP_SHARED, memfd, map->base);
- close(memfd);
- if (map->memory == MAP_FAILED)
+ if (map->memory == MAP_FAILED) {
+ close(memfd);
return errno;
-
+ }
return 0;
}