lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-30 22:43:12 +03:00
Code Activity

* sysdeps/alpha/dl-machine.h (RTLD_START): Fix top-of-stack backtrace. * sysdeps/unix/sysv/linux/alpha/clone.S: Likewise. * sysdeps/alpha/elf/start.S: Likewise. Remove pointless allocation. * sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Use standard ldgp entry sequence and explicit relocs. Add unwind info for sigreturn and rt_sigreturn. * configure.in (libc_cv_asm_cfi_directives): Test .cfi_remember_state. * configure: Regenerate.

Browse Source 
* sysdeps/alpha/dl-machine.h (RTLD_START): Fix top-of-stack backtrace.
        * sysdeps/unix/sysv/linux/alpha/clone.S: Likewise.
        * sysdeps/alpha/elf/start.S: Likewise.  Remove pointless allocation.
        * sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Use standard ldgp
        entry sequence and explicit relocs.  Add unwind info for sigreturn
        and rt_sigreturn.
        * configure.in (libc_cv_asm_cfi_directives): Test .cfi_remember_state.
        * configure: Regenerate.
This commit is contained in:
Richard Henderson
2003-06-06 05:54:15 +00:00
parent a56e4568df
commit f212e8dcf8
8 changed files with 116 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

93
sysdeps/unix/sysv/linux/alpha/rt_sigaction.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1998 Free Software Foundation, Inc.
/* Copyright (C) 1998, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@cygnus.com>, 1998
@ -28,55 +28,92 @@
#ifdef __NR_rt_sigaction
.text
ENTRY(__syscall_rt_sigaction)
.frame sp,0,ra,0
#ifdef PROF
ldgp gp,0(pv)
#ifdef PROF
.set noat
lda AT, _mcount
jsr AT, (AT), _mcount
.set at
#endif
/* Indicate non-standard use of our PV. */
.prologue 2
.prologue 1
beq a1, 0f
ldl t0, 8(a1) # sa_flags
lda a4, sigreturn-__syscall_rt_sigaction(pv)
lda t1, rt_sigreturn-__syscall_rt_sigaction(pv)
and t0, 0x00000040, t0 # SA_SIGINFO
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(a4) !gprellow
and t0, 0x00000040, t0 # SA_SIGINFO
cmovne t0, t1, a4
0: ldi v0,__NR_rt_sigaction
0: ldi v0, __NR_rt_sigaction
callsys
bne a3,1f
bne a3, SYSCALL_ERROR_LABEL
ret
1:
#ifndef PROF
br gp,2f
2: ldgp gp,0(gp)
#endif
SYSCALL_ERROR_HANDLER
PSEUDO_END(__syscall_rt_sigaction)
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. */
.align 5
.ent sigreturn
sigreturn:
.prologue 0
mov sp,a0
ldi v0,__NR_sigreturn
callsys
.end sigreturn
.macro SIGCONTEXT_REGS_I base, from=0
cfi_offset (\from, \base + (4 + \from) * 8)
.if 30-\from
SIGCONTEXT_REGS_I \base, "(\from+1)"
.endif
.endm
.macro SIGCONTEXT_REGS_F base, from=32
cfi_offset (\from, \base + (4 + 1 + \from) * 8)
.if 62-\from
SIGCONTEXT_REGS_F \base, "(\from+1)"
.endif
.endm
.macro SIGCONTEXT_REGS base
SIGCONTEXT_REGS_I \base
SIGCONTEXT_REGS_F \base
cfi_offset (63, \base + (4 + 32 + 1 + 32) * 8)
cfi_offset (64, \base + 2 * 8)
.endm
.align 4
.ent rt_sigreturn
nop
nop
nop
cfi_startproc
cfi_return_column (64)
SIGCONTEXT_REGS -648
cfi_def_cfa_offset (648)
nop
sigreturn:
mov sp, a0
ldi v0, __NR_sigreturn
callsys
cfi_endproc
.size sigreturn, .-sigreturn
.type sigreturn, @function
cfi_startproc
cfi_return_column (64)
SIGCONTEXT_REGS -648
cfi_def_cfa_offset (176 + 648)
nop
rt_sigreturn:
.prologue 0
mov sp,a0
ldi v0,__NR_rt_sigreturn
callsys
.end rt_sigreturn
cfi_endproc
.size rt_sigreturn, .-rt_sigreturn
.type rt_sigreturn, @function
#else
ENTRY(__syscall_rt_sigaction)
ldgp $29,0($27)