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sreadahead: adding readahead system call into bionic libc

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Add bionic libc to support readahead system call.
This is needed to enable sreadahead to work.

Change-Id: I3856e1a3833db82e6cf42fd34af7631bd40cc723
Author: Winson Yung <winson.w.yung@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
This commit is contained in:
Bruce Beare 2011-07-13 10:23:50 -07:00
parent a37f372973
commit e30e909363
9 changed files with 86 additions and 0 deletions
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1
libc/SYSCALLS.TXT
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@ -50,6 +50,7 @@ gid_t getegid:getegid32 () 202
uid_t getresuid:getresuid32 () 209
gid_t getresgid:getresgid32 () 211
pid_t gettid() 224
ssize_t readahead(int, off64_t, size_t) 225
int getgroups:getgroups32(int, gid_t *) 205
pid_t getpgid(pid_t) 132
pid_t getppid() 64

1
libc/arch-arm/syscalls.mk
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@ -14,6 +14,7 @@ syscall_src += arch-arm/syscalls/getegid.S
syscall_src += arch-arm/syscalls/getresuid.S
syscall_src += arch-arm/syscalls/getresgid.S
syscall_src += arch-arm/syscalls/gettid.S
syscall_src += arch-arm/syscalls/readahead.S
syscall_src += arch-arm/syscalls/getgroups.S
syscall_src += arch-arm/syscalls/getpgid.S
syscall_src += arch-arm/syscalls/getppid.S

16
libc/arch-arm/syscalls/readahead.S Normal file
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@ -0,0 +1,16 @@
/* autogenerated by gensyscalls.py */
#include <machine/asm.h>
#include <sys/linux-syscalls.h>
ENTRY(readahead)
mov ip, sp
.save {r4, r5, r6, r7}
stmfd sp!, {r4, r5, r6, r7}
ldmfd ip, {r4, r5, r6}
ldr r7, =__NR_readahead
swi #0
ldmfd sp!, {r4, r5, r6, r7}
movs r0, r0
bxpl lr
b __set_syscall_errno
END(readahead)

1
libc/arch-sh/syscalls.mk
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@ -15,6 +15,7 @@ syscall_src += arch-sh/syscalls/getegid.S
syscall_src += arch-sh/syscalls/getresuid.S
syscall_src += arch-sh/syscalls/getresgid.S
syscall_src += arch-sh/syscalls/gettid.S
syscall_src += arch-sh/syscalls/readahead.S
syscall_src += arch-sh/syscalls/getgroups.S
syscall_src += arch-sh/syscalls/getpgid.S
syscall_src += arch-sh/syscalls/getppid.S

32
libc/arch-sh/syscalls/readahead.S Normal file
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@ -0,0 +1,32 @@
/* autogenerated by gensyscalls.py */
#include <sys/linux-syscalls.h>
.text
.type readahead, @function
.globl readahead
.align 4
readahead:
/* invoke trap */
mov.l 0f, r3 /* trap num */
trapa #(4 + 0x10)
/* check return value */
cmp/pz r0
bt __NR_readahead_end
/* keep error number */
sts.l pr, @-r15
mov.l 1f, r1
jsr @r1
mov r0, r4
lds.l @r15+, pr
__NR_readahead_end:
rts
nop
.align 2
0: .long __NR_readahead
1: .long __set_syscall_errno

1
libc/arch-x86/syscalls.mk
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@ -15,6 +15,7 @@ syscall_src += arch-x86/syscalls/getegid.S
syscall_src += arch-x86/syscalls/getresuid.S
syscall_src += arch-x86/syscalls/getresgid.S
syscall_src += arch-x86/syscalls/gettid.S
syscall_src += arch-x86/syscalls/readahead.S
syscall_src += arch-x86/syscalls/getgroups.S
syscall_src += arch-x86/syscalls/getpgid.S
syscall_src += arch-x86/syscalls/getppid.S

32
libc/arch-x86/syscalls/readahead.S Normal file
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@ -0,0 +1,32 @@
/* autogenerated by gensyscalls.py */
#include <sys/linux-syscalls.h>
.text
.type readahead, @function
.globl readahead
.align 4
readahead:
pushl %ebx
pushl %ecx
pushl %edx
pushl %esi
mov 20(%esp), %ebx
mov 24(%esp), %ecx
mov 28(%esp), %edx
mov 32(%esp), %esi
movl $__NR_readahead, %eax
int $0x80
cmpl $-129, %eax
jb 1f
negl %eax
pushl %eax
call __set_errno
addl $4, %esp
orl $-1, %eax
1:
popl %esi
popl %edx
popl %ecx
popl %ebx
ret

1
libc/include/sys/linux-syscalls.h
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@ -20,6 +20,7 @@
#define __NR_getresuid32 (__NR_SYSCALL_BASE + 209)
#define __NR_getresgid32 (__NR_SYSCALL_BASE + 211)
#define __NR_gettid (__NR_SYSCALL_BASE + 224)
#define __NR_readahead (__NR_SYSCALL_BASE + 225)
#define __NR_getgroups32 (__NR_SYSCALL_BASE + 205)
#define __NR_getpgid (__NR_SYSCALL_BASE + 132)
#define __NR_getppid (__NR_SYSCALL_BASE + 64)

1
libc/include/sys/linux-unistd.h
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@ -20,6 +20,7 @@ gid_t getegid (void);
uid_t getresuid (void);
gid_t getresgid (void);
pid_t gettid (void);
ssize_t readahead (int, off64_t, size_t);
int getgroups (int, gid_t *);
pid_t getpgid (pid_t);
pid_t getppid (void);