bionic/libc/arch-mips64/syscalls/__getpid.S

/* Generated by gensyscalls.py. Do not edit. */

#include <private/bionic_asm.h>

ENTRY(__getpid)
    .set push
    .set noreorder
    li v0, __NR_getpid
    syscall
    bnez a3, 1f
    move a0, v0
    j ra
    nop
1:
    move t0, ra
    bal     2f
    nop
2:
    .cpsetup ra, t1, 2b
    LA t9,__set_errno
    .cpreturn
    j t9
    move ra, t0
    .set pop
END(__getpid)
.hidden __getpid
[MIPS64] Add syscall related files Change-Id: I2f5d05df0e767538a6fe467ca0a2386325f8b71f Signed-off-by: Chris Dearman <chris.dearman@imgtec.com> Signed-off-by: Raghu Gandham <raghu.gandham@imgtec.com> Signed-off-by: Duane Sand <duane.sand@imgtec.com> 2014-02-06 01:59:23 +01:00			`/* Generated by gensyscalls.py. Do not edit. */`

Make mips/mips64 syscall stubs more like the other architectures. Change-Id: I55f8c1a95f643a6e484f12fbcc25e2c77e55b6b8 2014-02-19 23:54:31 +01:00			`#include <private/bionic_asm.h>`
[MIPS64] Add syscall related files Change-Id: I2f5d05df0e767538a6fe467ca0a2386325f8b71f Signed-off-by: Chris Dearman <chris.dearman@imgtec.com> Signed-off-by: Raghu Gandham <raghu.gandham@imgtec.com> Signed-off-by: Duane Sand <duane.sand@imgtec.com> 2014-02-06 01:59:23 +01:00
Cache getpid. In practice, with this implementation we never need to make a system call. We get the main thread's tid (which is the same as our pid) back from the set_tid_address system call we have to make during initialization. A new pthread will have the same pid as its parent, and a fork child's main (and only) thread will have a pid equal to its tid, which we get for free from the kernel before clone returns. The only time we'd actually have to make a getpid system call now is if we take a signal during fork and the signal handler calls getpid. (That, or we call getpid in the dynamic linker while it's still dealing with its own relocations and hasn't even set up the main thread yet.) Bug: 15387103 Change-Id: I6d4718ed0a5c912fc75b5f738c49a023dbed5189 2014-06-20 01:39:01 +02:00			`ENTRY(__getpid)`
[MIPS64] Add syscall related files Change-Id: I2f5d05df0e767538a6fe467ca0a2386325f8b71f Signed-off-by: Chris Dearman <chris.dearman@imgtec.com> Signed-off-by: Raghu Gandham <raghu.gandham@imgtec.com> Signed-off-by: Duane Sand <duane.sand@imgtec.com> 2014-02-06 01:59:23 +01:00			`.set push`
			`.set noreorder`
			`li v0, __NR_getpid`
			`syscall`
			`bnez a3, 1f`
			`move a0, v0`
			`j ra`
			`nop`
			`1:`
			`move t0, ra`
			`bal 2f`
			`nop`
			`2:`
			`.cpsetup ra, t1, 2b`
			`LA t9,__set_errno`
			`.cpreturn`
			`j t9`
			`move ra, t0`
			`.set pop`
Cache getpid. In practice, with this implementation we never need to make a system call. We get the main thread's tid (which is the same as our pid) back from the set_tid_address system call we have to make during initialization. A new pthread will have the same pid as its parent, and a fork child's main (and only) thread will have a pid equal to its tid, which we get for free from the kernel before clone returns. The only time we'd actually have to make a getpid system call now is if we take a signal during fork and the signal handler calls getpid. (That, or we call getpid in the dynamic linker while it's still dealing with its own relocations and hasn't even set up the main thread yet.) Bug: 15387103 Change-Id: I6d4718ed0a5c912fc75b5f738c49a023dbed5189 2014-06-20 01:39:01 +02:00			`END(__getpid)`
			`.hidden __getpid`