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MIPS: 32/64-bit VDSO support 

File libc/SYSCALLS.TXT is updated to generate bionic's system call wrappers
for clock_gettime() & gettimeofday() that will be called if kernel vdso
implementations fail to execute.
The system call wrappers are generated using a python script gensyscalls.py.

Since all architectures support vdso now, there is no more need for conditional
statements regarding supported architectures in libc/bionic/vdso.cpp &
libc/private/bionic_vdso.h files.

Test: builds
Change-Id: I7213f29c179a7929851499d78a72900638ae861a
Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com>
This commit is contained in:
Goran Ferenc 2017-05-30 16:00:41 +02:00 committed by Elliott Hughes
parent 15eaaddef9
commit 996f6decfa
7 changed files with 13 additions and 22 deletions
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6
libc/SYSCALLS.TXT
View File

@ -350,7 +350,5 @@ int __set_tls:set_thread_area(void*) mips,mips64
int __set_thread_area:set_thread_area(void*) x86
# vdso stuff.
int clock_gettime(clockid_t, timespec*) mips,mips64
int __clock_gettime:clock_gettime(clockid_t, timespec*) arm,arm64,x86,x86_64
int gettimeofday(timeval*, timezone*) mips,mips64
int __gettimeofday:gettimeofday(timeval*, timezone*) arm,arm64,x86,x86_64
int __clock_gettime:clock_gettime(clockid_t, timespec*) all
int __gettimeofday:gettimeofday(timeval*, timezone*) all

4
libc/arch-mips/syscalls/clock_gettime.S → libc/arch-mips/syscalls/__clock_gettime.S
View File

@ -2,7 +2,7 @@
#include <private/bionic_asm.h>
ENTRY(clock_gettime)
ENTRY(__clock_gettime)
.set noreorder
.cpload t9
li v0, __NR_clock_gettime
@ -16,4 +16,4 @@ ENTRY(clock_gettime)
j t9
nop
.set reorder
END(clock_gettime)
END(__clock_gettime)

4
libc/arch-mips/syscalls/gettimeofday.S → libc/arch-mips/syscalls/__gettimeofday.S
View File

@ -2,7 +2,7 @@
#include <private/bionic_asm.h>
ENTRY(gettimeofday)
ENTRY(__gettimeofday)
.set noreorder
.cpload t9
li v0, __NR_gettimeofday
@ -16,4 +16,4 @@ ENTRY(gettimeofday)
j t9
nop
.set reorder
END(gettimeofday)
END(__gettimeofday)

5
libc/arch-mips64/syscalls/clock_gettime.S → libc/arch-mips64/syscalls/__clock_gettime.S
View File

@ -2,7 +2,7 @@
#include <private/bionic_asm.h>
ENTRY(clock_gettime)
ENTRY(__clock_gettime)
.set push
.set noreorder
li v0, __NR_clock_gettime
@ -22,4 +22,5 @@ ENTRY(clock_gettime)
j t9
move ra, t0
.set pop
END(clock_gettime)
END(__clock_gettime)
.hidden __clock_gettime

5
libc/arch-mips64/syscalls/gettimeofday.S → libc/arch-mips64/syscalls/__gettimeofday.S
View File

@ -2,7 +2,7 @@
#include <private/bionic_asm.h>
ENTRY(gettimeofday)
ENTRY(__gettimeofday)
.set push
.set noreorder
li v0, __NR_gettimeofday
@ -22,4 +22,5 @@ ENTRY(gettimeofday)
j t9
move ra, t0
.set pop
END(gettimeofday)
END(__gettimeofday)
.hidden __gettimeofday

9
libc/bionic/vdso.cpp
View File

@ -17,8 +17,6 @@
#include "private/bionic_globals.h"
#include "private/bionic_vdso.h"
#if defined(__aarch64__) || defined(__arm__) || defined(__i386__) || defined(__x86_64__)
#include <limits.h>
#include <link.h>
#include <string.h>
@ -112,10 +110,3 @@ void __libc_init_vdso(libc_globals* globals, KernelArgumentBlock& args) {
}
}
}
#else
void __libc_init_vdso(libc_globals*, KernelArgumentBlock&) {
}
#endif

2
libc/private/bionic_vdso.h
View File

@ -34,7 +34,7 @@
#if defined(__aarch64__)
#define VDSO_CLOCK_GETTIME_SYMBOL "__kernel_clock_gettime"
#define VDSO_GETTIMEOFDAY_SYMBOL "__kernel_gettimeofday"
#elif defined(__arm__) || defined(__i386__) || defined(__x86_64__)
#else
#define VDSO_CLOCK_GETTIME_SYMBOL "__vdso_clock_gettime"
#define VDSO_GETTIMEOFDAY_SYMBOL "__vdso_gettimeofday"
#endif