3rd-party/linux-kernel-module-cheat
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virt_to_phys: fix multiple read size

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build-buildroot: add --make-args
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2018-10-30 00:00:00 +00:00
parent b5b646ffd4
commit 873737bd1f
5 changed files with 47 additions and 5 deletions
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1
userland/README.adoc Normal file
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@@ -0,0 +1 @@
https://github.com/cirosantilli/linux-kernel-module-cheat#userland-directory

8
userland/common.h
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@@ -34,14 +34,16 @@ int pagemap_get_entry(PagemapEntry *entry, int pagemap_fd, uintptr_t vaddr)
size_t nread;
ssize_t ret;
uint64_t data;
uintptr_t vpn;
vpn = vaddr / sysconf(_SC_PAGE_SIZE);
nread = 0;
while (nread < sizeof(data)) {
ret = pread(
pagemap_fd,
&data,
sizeof(data),
(vaddr / sysconf(_SC_PAGE_SIZE)) * sizeof(data) + nread
sizeof(data) - nread,
vpn * sizeof(data) + nread
);
nread += ret;
if (ret <= 0) {
@@ -61,7 +63,7 @@ int pagemap_get_entry(PagemapEntry *entry, int pagemap_fd, uintptr_t vaddr)
* @param[out] paddr physical address
* @param[in] pid process to convert for
* @param[in] vaddr virtual address to get entry for
* @return 0 for success, 1 for failure
* @return 0 for success, 1 for failure
*/
int virt_to_phys_user(uintptr_t *paddr, pid_t pid, uintptr_t vaddr)
{