diff options
Diffstat (limited to 'toolchain/uClibc/uClibc-0.9.33-lstat-stat-fstat-Use-64bit-version-of-syscall.patch')
| -rw-r--r-- | toolchain/uClibc/uClibc-0.9.33-lstat-stat-fstat-Use-64bit-version-of-syscall.patch | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/toolchain/uClibc/uClibc-0.9.33-lstat-stat-fstat-Use-64bit-version-of-syscall.patch b/toolchain/uClibc/uClibc-0.9.33-lstat-stat-fstat-Use-64bit-version-of-syscall.patch new file mode 100644 index 000000000..a9d1c960c --- /dev/null +++ b/toolchain/uClibc/uClibc-0.9.33-lstat-stat-fstat-Use-64bit-version-of-syscall.patch @@ -0,0 +1,179 @@ +From b813377f6c746118a9d2625e6b29ffeec4233663 Mon Sep 17 00:00:00 2001 +From: Khem Raj <raj.khem@gmail.com> +Date: Fri, 3 Feb 2012 20:06:55 -0800 +Subject: [PATCH 3/4] lstat/stat/fstat: Use 64bit version of syscall if + available + +This is needed for stat'ing loop devices > 255 +since otherwise kernel returns EOVERFLOW becasue +it needs st_rdev/st_dev to be larger than 16bits but +in kernel it uses __old_kernel_stat for stat +syscall which has st_rdev/st_dev as unsigned short + +Add a testcase + +Signed-off-by: Khem Raj <raj.khem@gmail.com> +Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> +--- + libc/sysdeps/linux/common/fstat.c | 18 ++++++++++++++---- + libc/sysdeps/linux/common/lstat.c | 19 ++++++++++++++----- + libc/sysdeps/linux/common/stat.c | 18 ++++++++++++++---- + test/stat/stat-loop256.c | 32 ++++++++++++++++++++++++++++++++ + 4 files changed, 74 insertions(+), 13 deletions(-) + create mode 100644 test/stat/stat-loop256.c + +diff --git a/libc/sysdeps/linux/common/fstat.c b/libc/sysdeps/linux/common/fstat.c +index acc639b..4726a68 100644 +--- a/libc/sysdeps/linux/common/fstat.c ++++ b/libc/sysdeps/linux/common/fstat.c +@@ -12,18 +12,28 @@ + #include <sys/stat.h> + #include "xstatconv.h" + +-#define __NR___syscall_fstat __NR_fstat +-static __inline__ _syscall2(int, __syscall_fstat, int, fd, struct kernel_stat *, buf) +- + int fstat(int fd, struct stat *buf) + { + int result; ++#ifdef __NR_fstat64 ++ /* normal stat call has limited values for various stat elements ++ * e.g. uid device major/minor etc. ++ * so we use 64 variant if available ++ * in order to get newer versions of stat elements ++ */ ++ struct kernel_stat64 kbuf; ++ result = INLINE_SYSCALL(fstat64, 2, fd, &kbuf); ++ if (result == 0) { ++ __xstat32_conv(&kbuf, buf); ++ } ++#else + struct kernel_stat kbuf; + +- result = __syscall_fstat(fd, &kbuf); ++ result = INLINE_SYSCALL(fstat, 2, fd, &kbuf); + if (result == 0) { + __xstat_conv(&kbuf, buf); + } ++#endif + return result; + } + libc_hidden_def(fstat) +diff --git a/libc/sysdeps/linux/common/lstat.c b/libc/sysdeps/linux/common/lstat.c +index aa77447..db72d1f 100644 +--- a/libc/sysdeps/linux/common/lstat.c ++++ b/libc/sysdeps/linux/common/lstat.c +@@ -12,19 +12,28 @@ + #include <sys/stat.h> + #include "xstatconv.h" + +-#define __NR___syscall_lstat __NR_lstat +-static __inline__ _syscall2(int, __syscall_lstat, +- const char *, file_name, struct kernel_stat *, buf) +- + int lstat(const char *file_name, struct stat *buf) + { + int result; ++#ifdef __NR_lstat64 ++ /* normal stat call has limited values for various stat elements ++ * e.g. uid device major/minor etc. ++ * so we use 64 variant if available ++ * in order to get newer versions of stat elements ++ */ ++ struct kernel_stat64 kbuf; ++ result = INLINE_SYSCALL(lstat64, 2, file_name, &kbuf); ++ if (result == 0) { ++ __xstat32_conv(&kbuf, buf); ++ } ++#else + struct kernel_stat kbuf; + +- result = __syscall_lstat(file_name, &kbuf); ++ result = INLINE_SYSCALL(lstat, 2, file_name, &kbuf); + if (result == 0) { + __xstat_conv(&kbuf, buf); + } ++#endif + return result; + } + libc_hidden_def(lstat) +diff --git a/libc/sysdeps/linux/common/stat.c b/libc/sysdeps/linux/common/stat.c +index a6ab291..829f35a 100644 +--- a/libc/sysdeps/linux/common/stat.c ++++ b/libc/sysdeps/linux/common/stat.c +@@ -12,20 +12,30 @@ + #include <sys/stat.h> + #include "xstatconv.h" + +-#define __NR___syscall_stat __NR_stat + #undef stat +-static __inline__ _syscall2(int, __syscall_stat, +- const char *, file_name, struct kernel_stat *, buf) + + int stat(const char *file_name, struct stat *buf) + { + int result; ++#ifdef __NR_stat64 ++ /* normal stat call has limited values for various stat elements ++ * e.g. uid device major/minor etc. ++ * so we use 64 variant if available ++ * in order to get newer versions of stat elements ++ */ ++ struct kernel_stat64 kbuf; ++ result = INLINE_SYSCALL(stat64, 2, file_name, &kbuf); ++ if (result == 0) { ++ __xstat32_conv(&kbuf, buf); ++ } ++#else + struct kernel_stat kbuf; + +- result = __syscall_stat(file_name, &kbuf); ++ result = INLINE_SYSCALL(stat, 2, file_name, &kbuf); + if (result == 0) { + __xstat_conv(&kbuf, buf); + } ++#endif + return result; + } + libc_hidden_def(stat) +diff --git a/test/stat/stat-loop256.c b/test/stat/stat-loop256.c +new file mode 100644 +index 0000000..14284c1 +--- /dev/null ++++ b/test/stat/stat-loop256.c +@@ -0,0 +1,32 @@ ++#include <stdio.h> ++#include <unistd.h> ++#include <stdlib.h> ++#include <sys/stat.h> ++int main() ++{ ++ struct stat statbuf; ++ int ret = 0; ++ char* loop255 = "/dev/loop255"; ++ char* loop256 = "/dev/loop256"; ++ mode_t mode = 0660; ++ mknod(loop255, mode, 0x7ff); ++ mknod(loop256, mode, 0x100700); ++ ret = stat(loop255, &statbuf); ++ if(ret < 0) { ++ printf("stat: Cant stat %s\n",loop255); ++ unlink(loop255); ++ exit(1); ++ } ++ ret = stat(loop256, &statbuf); ++ if(ret < 0) { ++ printf("stat: Cant stat %s\n",loop256); ++ unlink(loop255); ++ unlink(loop256); ++ exit(1); ++ } ++ ++ unlink(loop255); ++ unlink(loop256); ++ exit(0); ++} ++ +-- +1.7.8.3 + |