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[PATCH v2 20/36] linux-user/hppa: Add vdso and use it for rt_sigreturn
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From: |
Richard Henderson |
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Subject: |
[PATCH v2 20/36] linux-user/hppa: Add vdso and use it for rt_sigreturn |
|
Date: |
Tue, 6 Jul 2021 16:49:16 -0700 |
Building the vdso itself is not actually wired up to anything, since
we require a cross-compiler. Just check in that file for now.
Drop the now-unused 9 trampoline words, and describe the frame
without the trampoline in __kernel_rt_sigreturn.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/elfload.c | 4 +
linux-user/hppa/signal.c | 8 +-
linux-user/hppa/Makefile.vdso | 6 ++
linux-user/hppa/meson.build | 6 ++
linux-user/hppa/vdso.S | 149 ++++++++++++++++++++++++++++++++++
linux-user/hppa/vdso.ld | 75 +++++++++++++++++
linux-user/hppa/vdso.so | Bin 0 -> 5196 bytes
7 files changed, 241 insertions(+), 7 deletions(-)
create mode 100644 linux-user/hppa/Makefile.vdso
create mode 100644 linux-user/hppa/vdso.S
create mode 100644 linux-user/hppa/vdso.ld
create mode 100755 linux-user/hppa/vdso.so
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 40cc79b129..ec3a854b44 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -1496,6 +1496,10 @@ static inline void init_thread(struct target_pt_regs
*regs,
#define STACK_GROWS_DOWN 0
#define STACK_ALIGNMENT 64
+#include "vdso.c.inc"
+
+#define vdso_image_info() &vdso_image_info
+
static inline void init_thread(struct target_pt_regs *regs,
struct image_info *infop)
{
diff --git a/linux-user/hppa/signal.c b/linux-user/hppa/signal.c
index 0e266f472d..44e2db6d3e 100644
--- a/linux-user/hppa/signal.c
+++ b/linux-user/hppa/signal.c
@@ -40,7 +40,6 @@ struct target_ucontext {
};
struct target_rt_sigframe {
- abi_uint tramp[9];
target_siginfo_t info;
struct target_ucontext uc;
/* hidden location of upper halves of pa2.0 64-bit gregs */
@@ -138,14 +137,9 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
setup_sigcontext(&frame->uc.tuc_mcontext, env);
- __put_user(0x34190000, frame->tramp + 0); /* ldi 0,%r25 */
- __put_user(0x3414015a, frame->tramp + 1); /* ldi __NR_rt_sigreturn,%r20 */
- __put_user(0xe4008200, frame->tramp + 2); /* be,l 0x100(%sr2,%r0) */
- __put_user(0x08000240, frame->tramp + 3); /* nop */
-
unlock_user_struct(frame, frame_addr, 1);
- env->gr[2] = h2g(frame->tramp);
+ env->gr[2] = default_rt_sigreturn;
env->gr[30] = sp;
env->gr[26] = sig;
env->gr[25] = h2g(&frame->info);
diff --git a/linux-user/hppa/Makefile.vdso b/linux-user/hppa/Makefile.vdso
new file mode 100644
index 0000000000..d4362c4961
--- /dev/null
+++ b/linux-user/hppa/Makefile.vdso
@@ -0,0 +1,6 @@
+CROSS_CC ?= hppa-linux-gnu-gcc
+
+vdso.so: vdso.S vdso.ld Makefile.vdso
+ $(CROSS_CC) -nostdlib -shared -Wl,-T,vdso.ld \
+ -Wl,-h,linux-vdso.so.1 -Wl,--build-id=sha1 \
+ -Wl,--hash-style=sysv vdso.S -o $@
diff --git a/linux-user/hppa/meson.build b/linux-user/hppa/meson.build
index 4709508a09..e065a16a96 100644
--- a/linux-user/hppa/meson.build
+++ b/linux-user/hppa/meson.build
@@ -3,3 +3,9 @@ syscall_nr_generators += {
arguments: [ meson.current_source_dir() / 'syscallhdr.sh',
'@INPUT@', '@OUTPUT@', '@EXTRA_ARGS@' ],
output: '@BASENAME@_nr.h')
}
+
+gen = [
+ gen_vdso.process('vdso.so', extra_args: ['-r', '__kernel_rt_sigreturn'])
+]
+
+linux_user_ss.add(when: 'TARGET_HPPA', if_true: gen)
diff --git a/linux-user/hppa/vdso.S b/linux-user/hppa/vdso.S
new file mode 100644
index 0000000000..eeae2c999a
--- /dev/null
+++ b/linux-user/hppa/vdso.S
@@ -0,0 +1,149 @@
+/*
+ * hppa linux kernel vdso replacement.
+ *
+ * Copyright 2021 Linaro, Ltd.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <asm/unistd.h>
+
+ .text
+
+#define sizeof_rt_sigframe 696
+#define offsetof_sigcontext 152
+#define offsetof_sigcontext_gr offsetof_sigcontext + 4
+#define offsetof_sigcontext_fr offsetof_sigcontext_gr + 32 * 4
+#define offsetof_sigcontext_iasq offsetof_sigcontext_fr + 32 * 8
+#define offsetof_sigcontext_iaoq offsetof_sigcontext_iasq + 8
+#define offsetof_sigcontext_sar offsetof_sigcontext_iaoq + 8
+
+ /*
+ * While this frame is marked as a signal frame, that only applies
+ * to how this return address is handled for the outer frame.
+ * The return address that arrived here, from the inner frame, is
+ * not marked as a signal frame and so the unwinder still tries to
+ * subtract 1 to examine the presumed call insn. Thus we must
+ * extend the unwind info to a nop before the start.
+ */
+
+ .cfi_startproc simple
+ .cfi_signal_frame
+
+ /* Compare pa32_fallback_frame_state from libgcc. */
+
+ /* Record the size of the stack frame. */
+ .cfi_def_cfa 30, -sizeof_rt_sigframe
+
+ /* Record save offset of general registers. */
+ .cfi_offset 1, offsetof_sigcontext_gr + 1 * 4
+ .cfi_offset 2, offsetof_sigcontext_gr + 2 * 4
+ .cfi_offset 3, offsetof_sigcontext_gr + 3 * 4
+ .cfi_offset 4, offsetof_sigcontext_gr + 4 * 4
+ .cfi_offset 5, offsetof_sigcontext_gr + 5 * 4
+ .cfi_offset 6, offsetof_sigcontext_gr + 6 * 4
+ .cfi_offset 7, offsetof_sigcontext_gr + 7 * 4
+ .cfi_offset 8, offsetof_sigcontext_gr + 8 * 4
+ .cfi_offset 9, offsetof_sigcontext_gr + 9 * 4
+ .cfi_offset 10, offsetof_sigcontext_gr + 10 * 4
+ .cfi_offset 11, offsetof_sigcontext_gr + 11 * 4
+ .cfi_offset 12, offsetof_sigcontext_gr + 12 * 4
+ .cfi_offset 13, offsetof_sigcontext_gr + 13 * 4
+ .cfi_offset 14, offsetof_sigcontext_gr + 14 * 4
+ .cfi_offset 15, offsetof_sigcontext_gr + 15 * 4
+ .cfi_offset 16, offsetof_sigcontext_gr + 16 * 4
+ .cfi_offset 17, offsetof_sigcontext_gr + 17 * 4
+ .cfi_offset 18, offsetof_sigcontext_gr + 18 * 4
+ .cfi_offset 19, offsetof_sigcontext_gr + 19 * 4
+ .cfi_offset 20, offsetof_sigcontext_gr + 20 * 4
+ .cfi_offset 21, offsetof_sigcontext_gr + 21 * 4
+ .cfi_offset 22, offsetof_sigcontext_gr + 22 * 4
+ .cfi_offset 23, offsetof_sigcontext_gr + 23 * 4
+ .cfi_offset 24, offsetof_sigcontext_gr + 24 * 4
+ .cfi_offset 25, offsetof_sigcontext_gr + 25 * 4
+ .cfi_offset 26, offsetof_sigcontext_gr + 26 * 4
+ .cfi_offset 27, offsetof_sigcontext_gr + 27 * 4
+ .cfi_offset 28, offsetof_sigcontext_gr + 28 * 4
+ .cfi_offset 29, offsetof_sigcontext_gr + 29 * 4
+ .cfi_offset 30, offsetof_sigcontext_gr + 30 * 4
+ .cfi_offset 31, offsetof_sigcontext_gr + 31 * 4
+
+ /* Record save offset of fp registers, left and right halves. */
+ .cfi_offset 32, offsetof_sigcontext_fr + 4 * 8
+ .cfi_offset 33, offsetof_sigcontext_fr + 4 * 8 + 4
+ .cfi_offset 34, offsetof_sigcontext_fr + 5 * 8
+ .cfi_offset 35, offsetof_sigcontext_fr + 5 * 8 + 4
+ .cfi_offset 36, offsetof_sigcontext_fr + 6 * 8
+ .cfi_offset 37, offsetof_sigcontext_fr + 6 * 8 + 4
+ .cfi_offset 38, offsetof_sigcontext_fr + 7 * 8
+ .cfi_offset 39, offsetof_sigcontext_fr + 7 * 8 + 4
+ .cfi_offset 40, offsetof_sigcontext_fr + 8 * 8
+ .cfi_offset 41, offsetof_sigcontext_fr + 8 * 8 + 4
+ .cfi_offset 42, offsetof_sigcontext_fr + 9 * 8
+ .cfi_offset 43, offsetof_sigcontext_fr + 9 * 8 + 4
+ .cfi_offset 44, offsetof_sigcontext_fr + 10 * 8
+ .cfi_offset 45, offsetof_sigcontext_fr + 10 * 8 + 4
+ .cfi_offset 46, offsetof_sigcontext_fr + 11 * 8
+ .cfi_offset 47, offsetof_sigcontext_fr + 11 * 8 + 4
+ .cfi_offset 48, offsetof_sigcontext_fr + 12 * 8
+ .cfi_offset 49, offsetof_sigcontext_fr + 12 * 8 + 4
+ .cfi_offset 50, offsetof_sigcontext_fr + 13 * 8
+ .cfi_offset 51, offsetof_sigcontext_fr + 13 * 8 + 4
+ .cfi_offset 52, offsetof_sigcontext_fr + 14 * 8
+ .cfi_offset 53, offsetof_sigcontext_fr + 14 * 8 + 4
+ .cfi_offset 54, offsetof_sigcontext_fr + 15 * 8
+ .cfi_offset 55, offsetof_sigcontext_fr + 15 * 8 + 4
+ .cfi_offset 56, offsetof_sigcontext_fr + 16 * 8
+ .cfi_offset 57, offsetof_sigcontext_fr + 16 * 8 + 4
+ .cfi_offset 58, offsetof_sigcontext_fr + 17 * 8
+ .cfi_offset 59, offsetof_sigcontext_fr + 17 * 8 + 4
+ .cfi_offset 60, offsetof_sigcontext_fr + 18 * 8
+ .cfi_offset 61, offsetof_sigcontext_fr + 18 * 8 + 4
+ .cfi_offset 62, offsetof_sigcontext_fr + 19 * 8
+ .cfi_offset 63, offsetof_sigcontext_fr + 19 * 8 + 4
+ .cfi_offset 64, offsetof_sigcontext_fr + 20 * 8
+ .cfi_offset 65, offsetof_sigcontext_fr + 20 * 8 + 4
+ .cfi_offset 66, offsetof_sigcontext_fr + 21 * 8
+ .cfi_offset 67, offsetof_sigcontext_fr + 21 * 8 + 4
+ .cfi_offset 68, offsetof_sigcontext_fr + 22 * 8
+ .cfi_offset 69, offsetof_sigcontext_fr + 22 * 8 + 4
+ .cfi_offset 70, offsetof_sigcontext_fr + 23 * 8
+ .cfi_offset 71, offsetof_sigcontext_fr + 23 * 8 + 4
+ .cfi_offset 72, offsetof_sigcontext_fr + 24 * 8
+ .cfi_offset 73, offsetof_sigcontext_fr + 24 * 8 + 4
+ .cfi_offset 74, offsetof_sigcontext_fr + 25 * 8
+ .cfi_offset 75, offsetof_sigcontext_fr + 25 * 8 + 4
+ .cfi_offset 76, offsetof_sigcontext_fr + 26 * 8
+ .cfi_offset 77, offsetof_sigcontext_fr + 26 * 8 + 4
+ .cfi_offset 78, offsetof_sigcontext_fr + 27 * 8
+ .cfi_offset 79, offsetof_sigcontext_fr + 27 * 8 + 4
+ .cfi_offset 80, offsetof_sigcontext_fr + 28 * 8
+ .cfi_offset 81, offsetof_sigcontext_fr + 28 * 8 + 4
+ .cfi_offset 82, offsetof_sigcontext_fr + 29 * 8
+ .cfi_offset 83, offsetof_sigcontext_fr + 29 * 8 + 4
+ .cfi_offset 84, offsetof_sigcontext_fr + 30 * 8
+ .cfi_offset 85, offsetof_sigcontext_fr + 30 * 8 + 4
+ .cfi_offset 86, offsetof_sigcontext_fr + 31 * 8
+ .cfi_offset 87, offsetof_sigcontext_fr + 31 * 8 + 4
+
+ /* Record save offset of %sar */
+ .cfi_offset 88, offsetof_sigcontext_sar
+
+ /* Record save offset of return address, iaoq[0]. */
+ .cfi_return_column 89
+ .cfi_offset 89, offsetof_sigcontext_iaoq
+
+ nop
+
+__kernel_rt_sigreturn:
+
+ ldi 0, %r25
+ ldi __NR_rt_sigreturn, %r20
+ be,l 0x100(%sr2, %r0), %sr0, %r31
+ nop
+
+ .cfi_endproc
+
+ .size __kernel_rt_sigreturn, . - __kernel_rt_sigreturn
+ .type __kernel_rt_sigreturn, @function
+ .globl __kernel_rt_sigreturn
diff --git a/linux-user/hppa/vdso.ld b/linux-user/hppa/vdso.ld
new file mode 100644
index 0000000000..fed994c3eb
--- /dev/null
+++ b/linux-user/hppa/vdso.ld
@@ -0,0 +1,75 @@
+/*
+ * Linker script for linux hppa vdso.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Note that the kernel does not implement a vdso for hppa.
+ * Mirror the symbol that other targets use for this, e.g. i386.
+ */
+
+VERSION {
+ QEMU {
+ global:
+ __kernel_rt_sigreturn;
+ local: *;
+ };
+}
+
+
+PHDRS {
+ phdr PT_PHDR FLAGS(4) PHDRS;
+ data PT_LOAD FLAGS(6) FILEHDR PHDRS;
+ text PT_LOAD FLAGS(5);
+ dynamic PT_DYNAMIC FLAGS(4);
+ note PT_NOTE FLAGS(4);
+ eh_frame_hdr PT_GNU_EH_FRAME;
+}
+
+SECTIONS {
+ . = SIZEOF_HEADERS;
+
+ /* The following, including the FILEHDRS and PHDRS, are modified
+ when we relocate the binary. We want them to be initially
+ writable for the relocation; we'll force them read-only after. */
+ .note : { *(.note*) } :data :note
+ .dynamic : { *(.dynamic) } :data :dynamic
+ .dynsym : { *(.dynsym) } :data
+ .data : {
+ /* There ought not be any real read-write data.
+ But since we manipulated the segment layout,
+ we have to put these sections somewhere. */
+ *(.data*)
+ *(.sdata*)
+ *(.got.plt) *(.got)
+ *(.gnu.linkonce.d.*)
+ *(.bss*)
+ *(.dynbss*)
+ *(.gnu.linkonce.b.*)
+ }
+
+ .rodata : { *(.rodata) }
+ .hash : { *(.hash) }
+ .gnu.hash : { *(.gnu.hash) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+ .eh_frame_hdr : { *(.eh_frame_hdr) } :data :eh_frame_hdr
+ .eh_frame : { *(.eh_frame) } :data
+
+ . = ALIGN(4096);
+ .text : { *(.text*) } :text
+}
diff --git a/linux-user/hppa/vdso.so b/linux-user/hppa/vdso.so
new file mode 100755
index
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GIT binary patch
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--
2.25.1
- Re: [PATCH v2 13/36] linux-user/arm: Drop v1 signal frames, (continued)
- [PATCH v2 14/36] linux-user/arm: Drop "_v2" from symbols in signal.c, Richard Henderson, 2021/07/06
- [PATCH v2 12/36] linux-user/aarch64: Add vdso and use it for rt_sigreturn, Richard Henderson, 2021/07/06
- [PATCH v2 15/36] target/arm: Add isar_feature_aa32_a32, Richard Henderson, 2021/07/06
- [PATCH v2 17/36] linux-user/alpha: Implement setup_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 18/36] linux-user/cris: Implement setup_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 16/36] linux-user/arm: Add vdso and use it for rt_sigreturn, Richard Henderson, 2021/07/06
- [PATCH v2 19/36] linux-user/hexagon: Implement setup_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 20/36] linux-user/hppa: Add vdso and use it for rt_sigreturn,
Richard Henderson <=
- [PATCH v2 21/36] linux-user/x86_64: Raise SIGSEGV if SA_RESTORER not set, Richard Henderson, 2021/07/06
- [PATCH v2 23/36] linux-user/x86_64: Add vdso, Richard Henderson, 2021/07/06
- [PATCH v2 22/36] linux-user/i386: Add vdso and use it for sigreturn, Richard Henderson, 2021/07/06
- [PATCH v2 28/36] linux-user/nios2: Document non-use of setup_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 25/36] linux-user/microblaze: Implement setup_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 29/36] linux-user/openrisc: Implement setup_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 27/36] linux-user/mips: Implement setup_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 26/36] linux-user/mips: Tidy install_sigtramp, Richard Henderson, 2021/07/06
- [PATCH v2 24/36] linux-user/m68k: Implement setup_sigtramp, Richard Henderson, 2021/07/06