mirror of
https://sourceware.org/git/glibc.git
synced 2025-01-10 03:10:09 +00:00
* sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Prefix stubs with __syscall_, move nop inside, adjust users by +4.
2004-01-15 Richard Henderson <rth@redhat.com> * sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Prefix stubs with __syscall_, move nop inside, adjust users by +4.
This commit is contained in:
parent
5ef6ae4bdb
commit
23e50ece45
@ -1,3 +1,8 @@
|
||||
2004-01-15 Richard Henderson <rth@redhat.com>
|
||||
|
||||
* sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Prefix stubs with
|
||||
__syscall_, move nop inside, adjust users by +4.
|
||||
|
||||
2004-01-14 Steven Munroe <sjmunroe@us.ibm.com>
|
||||
|
||||
* include/libc-symbols.h [HAVE_ASM_GLOBAL_DOT_NAME]
|
||||
|
@ -26,7 +26,6 @@
|
||||
|
||||
This just about halves signal delivery time. */
|
||||
|
||||
#ifdef __NR_rt_sigaction
|
||||
.text
|
||||
|
||||
ENTRY(__syscall_rt_sigaction)
|
||||
@ -42,12 +41,20 @@ ENTRY(__syscall_rt_sigaction)
|
||||
|
||||
beq a1, 0f
|
||||
ldl t0, 8(a1) # sa_flags
|
||||
ldah a4, sigreturn(gp) !gprelhigh
|
||||
ldah t1, rt_sigreturn(gp) !gprelhigh
|
||||
lda a4, sigreturn(a4) !gprellow
|
||||
lda t1, rt_sigreturn(t1) !gprellow
|
||||
and t0, 0x00000040, t0 # SA_SIGINFO
|
||||
|
||||
/* The unwinder will subtract one from the return address when
|
||||
attempting to find the call instruction that led us here.
|
||||
Since we didn't get here via a normal call, if we do nothing
|
||||
we would pick up the wrong symbol and the wrong FDE. Account
|
||||
for this by adding a nop to the start of the function and
|
||||
then skipping it here by adding 4. */
|
||||
ldah a4, __syscall_sigreturn+4(gp) !gprelhigh
|
||||
ldah t1, __syscall_rt_sigreturn+4(gp) !gprelhigh
|
||||
lda a4, __syscall_sigreturn+4(a4) !gprellow
|
||||
lda t1, __syscall_rt_sigreturn+4(t1) !gprellow
|
||||
and t0, 0x40, t0 # SA_SIGINFO
|
||||
cmovne t0, t1, a4
|
||||
|
||||
0: ldi v0, __NR_rt_sigaction
|
||||
callsys
|
||||
bne a3, SYSCALL_ERROR_LABEL
|
||||
@ -57,10 +64,10 @@ PSEUDO_END(__syscall_rt_sigaction)
|
||||
|
||||
/* To enable unwinding through the signal frame without special hackery
|
||||
elsewhere, describe the entire struct sigcontext with unwind info.
|
||||
Note that we begin the unwind info one instruction before the start
|
||||
of the function; the unwinder will subtract one from the return address
|
||||
attempting to find the call instruction that led us here, since we
|
||||
didn't get here via a normal call. */
|
||||
|
||||
In order to minimize the size of the encoding, we set the CFA to the
|
||||
end of the sigcontext, which makes all of the registers have small
|
||||
negative offsets from that. */
|
||||
|
||||
.macro SIGCONTEXT_REGS_I base, from=0
|
||||
cfi_offset (\from, \base + (4 + \from) * 8)
|
||||
@ -91,34 +98,23 @@ PSEUDO_END(__syscall_rt_sigaction)
|
||||
cfi_startproc
|
||||
cfi_return_column (64)
|
||||
SIGCONTEXT_REGS -648
|
||||
|
||||
cfi_def_cfa_offset (648)
|
||||
__syscall_sigreturn:
|
||||
nop
|
||||
sigreturn:
|
||||
mov sp, a0
|
||||
ldi v0, __NR_sigreturn
|
||||
callsys
|
||||
cfi_endproc
|
||||
.size sigreturn, .-sigreturn
|
||||
.type sigreturn, @function
|
||||
.size __syscall_sigreturn, .-__syscall_sigreturn
|
||||
.type __syscall_sigreturn, @function
|
||||
|
||||
cfi_startproc
|
||||
cfi_return_column (64)
|
||||
SIGCONTEXT_REGS -648
|
||||
cfi_def_cfa_offset (176 + 648)
|
||||
__syscall_rt_sigreturn:
|
||||
nop
|
||||
rt_sigreturn:
|
||||
mov sp,a0
|
||||
ldi v0,__NR_rt_sigreturn
|
||||
callsys
|
||||
cfi_endproc
|
||||
.size rt_sigreturn, .-rt_sigreturn
|
||||
.type rt_sigreturn, @function
|
||||
.size __syscall_rt_sigreturn, .-__syscall_rt_sigreturn
|
||||
.type __syscall_rt_sigreturn, @function
|
||||
|
||||
#else
|
||||
ENTRY(__syscall_rt_sigaction)
|
||||
ldgp $29,0($27)
|
||||
.prologue 1
|
||||
ldi $0,ENOSYS
|
||||
SYSCALL_ERROR_HANDLER
|
||||
END(__syscall_rt_sigaction)
|
||||
#endif
|
||||
cfi_endproc
|
||||
|
Loading…
Reference in New Issue
Block a user