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libc: Add ftruncate64 and improve 64-bit parameter syscall handling.

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This patch improves the handling of 64-bit parameters in syscalls on ARM.
The ARM EABI mandates that 64-bit quantities be passed in even/odd register
pairs, which requires special treatment.

This allows us to simplify our implementations of pread() and pwrite()
and remove the C stubs for pread64() and pwrite64().

Also add ftruncate64() to <unistd.h>

Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef

Bug 3107933
This commit is contained in:
David 'Digit' Turner
2010-12-16 16:47:14 +01:00
parent 4a7f31fad7
commit 95d751feac
23 changed files with 181 additions and 116 deletions
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5
libc/SYSCALLS.TXT
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@@ -85,8 +85,8 @@ int acct(const char* filepath) 51
# file descriptors
ssize_t read (int, void*, size_t) 3
ssize_t write (int, const void*, size_t) 4
ssize_t __pread64:pread64 (int, void *, size_t, off_t, off_t) 180
ssize_t __pwrite64:pwrite64 (int, void *, size_t, off_t, off_t) 181
ssize_t pread64 (int, void *, size_t, off64_t) 180
ssize_t pwrite64 (int, void *, size_t, off64_t) 181
int __open:open (const char*, int, mode_t) 5
int __openat:openat (int, const char*, int, mode_t) 322,295
int close (int) 6
@@ -116,6 +116,7 @@ int pipe2(int *, int) 359,331
int dup2(int, int) 63
int select:_newselect(int, struct fd_set *, struct fd_set *, struct fd_set *, struct timeval *) 142
int ftruncate(int, off_t) 93
int ftruncate64(int, off64_t) 194
int getdents:getdents64(unsigned int, struct dirent *, unsigned int) 217,220
int fsync(int) 118
int fdatasync(int) 148