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| author | David 'Digit' Turner <digit@google.com> | 2010-12-16 16:47:14 +0100 |
|---|---|---|
| committer | David 'Digit' Turner <digit@google.com> | 2010-12-16 17:04:41 +0100 |
| commit | 95d751feacdb58d3fbc36f3f21a895a3ec2f065b (patch) | |
| tree | fc598e3e60c32a6bb576e224d27f37905769f0e8 /libc/arch-x86/syscalls | |
| parent | 4a7f31fad74417696ce740b1f5c14e4de0740e33 (diff) | |
| download | bionic-95d751feacdb58d3fbc36f3f21a895a3ec2f065b.zip bionic-95d751feacdb58d3fbc36f3f21a895a3ec2f065b.tar.gz bionic-95d751feacdb58d3fbc36f3f21a895a3ec2f065b.tar.bz2 | |
libc: Add ftruncate64 and improve 64-bit parameter syscall handling.
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
Diffstat (limited to 'libc/arch-x86/syscalls')
| -rw-r--r-- | libc/arch-x86/syscalls/ftruncate64.S | 29 | ||||
| -rw-r--r-- | libc/arch-x86/syscalls/pread64.S (renamed from libc/arch-x86/syscalls/__pread64.S) | 6 | ||||
| -rw-r--r-- | libc/arch-x86/syscalls/pwrite64.S (renamed from libc/arch-x86/syscalls/__pwrite64.S) | 6 |
3 files changed, 35 insertions, 6 deletions
diff --git a/libc/arch-x86/syscalls/ftruncate64.S b/libc/arch-x86/syscalls/ftruncate64.S new file mode 100644 index 0000000..66835ab --- /dev/null +++ b/libc/arch-x86/syscalls/ftruncate64.S @@ -0,0 +1,29 @@ +/* autogenerated by gensyscalls.py */ +#include <sys/linux-syscalls.h> + + .text + .type ftruncate64, @function + .globl ftruncate64 + .align 4 + +ftruncate64: + pushl %ebx + pushl %ecx + pushl %edx + mov 16(%esp), %ebx + mov 20(%esp), %ecx + mov 24(%esp), %edx + movl $__NR_ftruncate64, %eax + int $0x80 + cmpl $-129, %eax + jb 1f + negl %eax + pushl %eax + call __set_errno + addl $4, %esp + orl $-1, %eax +1: + popl %edx + popl %ecx + popl %ebx + ret diff --git a/libc/arch-x86/syscalls/__pread64.S b/libc/arch-x86/syscalls/pread64.S index 3114673..eb004a9 100644 --- a/libc/arch-x86/syscalls/__pread64.S +++ b/libc/arch-x86/syscalls/pread64.S @@ -2,11 +2,11 @@ #include <sys/linux-syscalls.h> .text - .type __pread64, @function - .globl __pread64 + .type pread64, @function + .globl pread64 .align 4 -__pread64: +pread64: pushl %ebx pushl %ecx pushl %edx diff --git a/libc/arch-x86/syscalls/__pwrite64.S b/libc/arch-x86/syscalls/pwrite64.S index 28f6536..01389f8 100644 --- a/libc/arch-x86/syscalls/__pwrite64.S +++ b/libc/arch-x86/syscalls/pwrite64.S @@ -2,11 +2,11 @@ #include <sys/linux-syscalls.h> .text - .type __pwrite64, @function - .globl __pwrite64 + .type pwrite64, @function + .globl pwrite64 .align 4 -__pwrite64: +pwrite64: pushl %ebx pushl %ecx pushl %edx |