From 00cc2934b2f02c469bd28cae0f1ac09e289a5ae9 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 14 Aug 2023 13:22:57 -0700 Subject: [PATCH] linux-user/loongarch64: Add vdso MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Requires a relatively recent binutils version in order to avoid spurious R_LARCH_NONE relocations. The presence of these relocs are diagnosed by our gen-vdso tool. Tested-by: Song Gao Reviewed-by: Song Gao Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- linux-user/elfload.c | 2 + linux-user/loongarch64/Makefile.vdso | 11 ++ linux-user/loongarch64/meson.build | 4 + linux-user/loongarch64/signal.c | 17 +++- linux-user/loongarch64/vdso-asmoffset.h | 8 ++ linux-user/loongarch64/vdso.S | 130 ++++++++++++++++++++++++ linux-user/loongarch64/vdso.ld | 73 +++++++++++++ linux-user/loongarch64/vdso.so | Bin 0 -> 3560 bytes linux-user/meson.build | 1 + 9 files changed, 245 insertions(+), 1 deletion(-) create mode 100644 linux-user/loongarch64/Makefile.vdso create mode 100644 linux-user/loongarch64/meson.build create mode 100644 linux-user/loongarch64/vdso-asmoffset.h create mode 100644 linux-user/loongarch64/vdso.S create mode 100644 linux-user/loongarch64/vdso.ld create mode 100755 linux-user/loongarch64/vdso.so diff --git a/linux-user/elfload.c b/linux-user/elfload.c index e2d90b84a9..4e6e0059e6 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1197,6 +1197,8 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *en #define elf_check_arch(x) ((x) == EM_LOONGARCH) +#define VDSO_HEADER "vdso.c.inc" + static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) { diff --git a/linux-user/loongarch64/Makefile.vdso b/linux-user/loongarch64/Makefile.vdso new file mode 100644 index 0000000000..369de13344 --- /dev/null +++ b/linux-user/loongarch64/Makefile.vdso @@ -0,0 +1,11 @@ +include $(BUILD_DIR)/tests/tcg/loongarch64-linux-user/config-target.mak + +SUBDIR = $(SRC_PATH)/linux-user/loongarch64 +VPATH += $(SUBDIR) + +all: $(SUBDIR)/vdso.so + +$(SUBDIR)/vdso.so: vdso.S vdso.ld vdso-asmoffset.h + $(CC) -o $@ -nostdlib -shared -fpic -Wl,-h,linux-vdso.so.1 \ + -Wl,--build-id=sha1 -Wl,--hash-style=both \ + -Wl,--no-warn-rwx-segments -Wl,-T,$(SUBDIR)/vdso.ld $< diff --git a/linux-user/loongarch64/meson.build b/linux-user/loongarch64/meson.build new file mode 100644 index 0000000000..17896535f0 --- /dev/null +++ b/linux-user/loongarch64/meson.build @@ -0,0 +1,4 @@ +vdso_inc = gen_vdso.process('vdso.so', + extra_args: ['-r', '__vdso_rt_sigreturn']) + +linux_user_ss.add(when: 'TARGET_LOONGARCH64', if_true: vdso_inc) diff --git a/linux-user/loongarch64/signal.c b/linux-user/loongarch64/signal.c index 39572c1190..afcee641a6 100644 --- a/linux-user/loongarch64/signal.c +++ b/linux-user/loongarch64/signal.c @@ -10,9 +10,9 @@ #include "user-internals.h" #include "signal-common.h" #include "linux-user/trace.h" - #include "target/loongarch/internals.h" #include "target/loongarch/vec.h" +#include "vdso-asmoffset.h" /* FP context was used */ #define SC_USED_FP (1 << 0) @@ -24,6 +24,11 @@ struct target_sigcontext { uint64_t sc_extcontext[0] QEMU_ALIGNED(16); }; +QEMU_BUILD_BUG_ON(sizeof(struct target_sigcontext) != sizeof_sigcontext); +QEMU_BUILD_BUG_ON(offsetof(struct target_sigcontext, sc_pc) + != offsetof_sigcontext_pc); +QEMU_BUILD_BUG_ON(offsetof(struct target_sigcontext, sc_regs) + != offsetof_sigcontext_gr); #define FPU_CTX_MAGIC 0x46505501 #define FPU_CTX_ALIGN 8 @@ -33,6 +38,9 @@ struct target_fpu_context { uint32_t fcsr; } QEMU_ALIGNED(FPU_CTX_ALIGN); +QEMU_BUILD_BUG_ON(offsetof(struct target_fpu_context, regs) + != offsetof_fpucontext_fr); + #define CONTEXT_INFO_ALIGN 16 struct target_sctx_info { uint32_t magic; @@ -40,6 +48,8 @@ struct target_sctx_info { uint64_t padding; } QEMU_ALIGNED(CONTEXT_INFO_ALIGN); +QEMU_BUILD_BUG_ON(sizeof(struct target_sctx_info) != sizeof_sctx_info); + struct target_ucontext { abi_ulong tuc_flags; abi_ptr tuc_link; @@ -54,6 +64,11 @@ struct target_rt_sigframe { struct target_ucontext rs_uc; }; +QEMU_BUILD_BUG_ON(sizeof(struct target_rt_sigframe) + != sizeof_rt_sigframe); +QEMU_BUILD_BUG_ON(offsetof(struct target_rt_sigframe, rs_uc.tuc_mcontext) + != offsetof_sigcontext); + /* * These two structures are not present in guest memory, are private * to the signal implementation, but are largely copied from the diff --git a/linux-user/loongarch64/vdso-asmoffset.h b/linux-user/loongarch64/vdso-asmoffset.h new file mode 100644 index 0000000000..60d113822f --- /dev/null +++ b/linux-user/loongarch64/vdso-asmoffset.h @@ -0,0 +1,8 @@ +#define sizeof_rt_sigframe 0x240 +#define sizeof_sigcontext 0x110 +#define sizeof_sctx_info 0x10 + +#define offsetof_sigcontext 0x130 +#define offsetof_sigcontext_pc 0 +#define offsetof_sigcontext_gr 8 +#define offsetof_fpucontext_fr 0 diff --git a/linux-user/loongarch64/vdso.S b/linux-user/loongarch64/vdso.S new file mode 100644 index 0000000000..780a5fda12 --- /dev/null +++ b/linux-user/loongarch64/vdso.S @@ -0,0 +1,130 @@ +/* + * Loongarch64 linux replacement vdso. + * + * Copyright 2023 Linaro, Ltd. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include +#include +#include "vdso-asmoffset.h" + + + .text + +.macro endf name + .globl \name + .type \name, @function + .size \name, . - \name +.endm + +.macro vdso_syscall name, nr +\name: + li.w $a7, \nr + syscall 0 + jr $ra +endf \name +.endm + + .cfi_startproc + +vdso_syscall __vdso_gettimeofday, __NR_gettimeofday +vdso_syscall __vdso_clock_gettime, __NR_clock_gettime +vdso_syscall __vdso_clock_getres, __NR_clock_getres +vdso_syscall __vdso_getcpu, __NR_getcpu + + .cfi_endproc + +/* + * Start the unwind info at least one instruction before the signal + * trampoline, because the unwinder will assume we are returning + * after a call site. + */ + + .cfi_startproc simple + .cfi_signal_frame + +#define B_GR offsetof_sigcontext_gr +#define B_FR sizeof_sigcontext + sizeof_sctx_info + offsetof_fpucontext_fr + + .cfi_def_cfa 2, offsetof_sigcontext + + /* Return address */ + .cfi_return_column 64 + .cfi_offset 64, offsetof_sigcontext_pc /* pc */ + + /* Integer registers */ + .cfi_offset 1, B_GR + 1 * 8 + .cfi_offset 2, B_GR + 2 * 8 + .cfi_offset 3, B_GR + 3 * 8 + .cfi_offset 4, B_GR + 4 * 8 + .cfi_offset 5, B_GR + 5 * 8 + .cfi_offset 6, B_GR + 6 * 8 + .cfi_offset 7, B_GR + 7 * 8 + .cfi_offset 8, B_GR + 8 * 8 + .cfi_offset 9, B_GR + 9 * 8 + .cfi_offset 10, B_GR + 10 * 8 + .cfi_offset 11, B_GR + 11 * 8 + .cfi_offset 12, B_GR + 12 * 8 + .cfi_offset 13, B_GR + 13 * 8 + .cfi_offset 14, B_GR + 14 * 8 + .cfi_offset 15, B_GR + 15 * 8 + .cfi_offset 16, B_GR + 16 * 8 + .cfi_offset 17, B_GR + 17 * 8 + .cfi_offset 18, B_GR + 18 * 8 + .cfi_offset 19, B_GR + 19 * 8 + .cfi_offset 20, B_GR + 20 * 8 + .cfi_offset 21, B_GR + 21 * 8 + .cfi_offset 22, B_GR + 22 * 8 + .cfi_offset 23, B_GR + 23 * 8 + .cfi_offset 24, B_GR + 24 * 8 + .cfi_offset 25, B_GR + 25 * 8 + .cfi_offset 26, B_GR + 26 * 8 + .cfi_offset 27, B_GR + 27 * 8 + .cfi_offset 28, B_GR + 28 * 8 + .cfi_offset 29, B_GR + 29 * 8 + .cfi_offset 30, B_GR + 30 * 8 + .cfi_offset 31, B_GR + 31 * 8 + + /* Floating point registers */ + .cfi_offset 32, B_FR + 0 + .cfi_offset 33, B_FR + 1 * 8 + .cfi_offset 34, B_FR + 2 * 8 + .cfi_offset 35, B_FR + 3 * 8 + .cfi_offset 36, B_FR + 4 * 8 + .cfi_offset 37, B_FR + 5 * 8 + .cfi_offset 38, B_FR + 6 * 8 + .cfi_offset 39, B_FR + 7 * 8 + .cfi_offset 40, B_FR + 8 * 8 + .cfi_offset 41, B_FR + 9 * 8 + .cfi_offset 42, B_FR + 10 * 8 + .cfi_offset 43, B_FR + 11 * 8 + .cfi_offset 44, B_FR + 12 * 8 + .cfi_offset 45, B_FR + 13 * 8 + .cfi_offset 46, B_FR + 14 * 8 + .cfi_offset 47, B_FR + 15 * 8 + .cfi_offset 48, B_FR + 16 * 8 + .cfi_offset 49, B_FR + 17 * 8 + .cfi_offset 50, B_FR + 18 * 8 + .cfi_offset 51, B_FR + 19 * 8 + .cfi_offset 52, B_FR + 20 * 8 + .cfi_offset 53, B_FR + 21 * 8 + .cfi_offset 54, B_FR + 22 * 8 + .cfi_offset 55, B_FR + 23 * 8 + .cfi_offset 56, B_FR + 24 * 8 + .cfi_offset 57, B_FR + 25 * 8 + .cfi_offset 58, B_FR + 26 * 8 + .cfi_offset 59, B_FR + 27 * 8 + .cfi_offset 60, B_FR + 28 * 8 + .cfi_offset 61, B_FR + 29 * 8 + .cfi_offset 62, B_FR + 30 * 8 + .cfi_offset 63, B_FR + 31 * 8 + + nop + +__vdso_rt_sigreturn: + li.w $a7, __NR_rt_sigreturn + syscall 0 + .cfi_endproc +endf __vdso_rt_sigreturn diff --git a/linux-user/loongarch64/vdso.ld b/linux-user/loongarch64/vdso.ld new file mode 100644 index 0000000000..682446ed0c --- /dev/null +++ b/linux-user/loongarch64/vdso.ld @@ -0,0 +1,73 @@ +/* + * Linker script for linux loongarch64 replacement vdso. + * + * Copyright 2023 Linaro, Ltd. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +VERSION { + LINUX_5.10 { + global: + __vdso_getcpu; + __vdso_clock_getres; + __vdso_clock_gettime; + __vdso_gettimeofday; + __vdso_rt_sigreturn; + + local: *; + }; +} + + +PHDRS { + phdr PT_PHDR FLAGS(4) PHDRS; + load PT_LOAD FLAGS(7) FILEHDR PHDRS; + dynamic PT_DYNAMIC FLAGS(4); + eh_frame_hdr PT_GNU_EH_FRAME; + note PT_NOTE FLAGS(4); +} + +SECTIONS { + /* + * We can't prelink to any address without knowing something about + * the virtual memory space of the host, since that leaks over into + * the available memory space of the guest. + */ + . = 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*) } :load :note + .dynamic : { *(.dynamic) } :load :dynamic + .dynsym : { *(.dynsym) } :load + /* + * There ought not be any real read-write data. + * But since we manipulated the segment layout, + * we have to put these sections somewhere. + */ + .data : { + *(.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) } :load :eh_frame_hdr + .eh_frame : { *(.eh_frame) } :load + + .text : { *(.text*) } :load =0xd503201f +} diff --git a/linux-user/loongarch64/vdso.so b/linux-user/loongarch64/vdso.so new file mode 100755 index 0000000000000000000000000000000000000000..bfaa26f2bfe1aaa01d9a349b8b030ef6323e1f8e GIT binary patch literal 3560 zcmc&%|4$r66ra5Rj;76P?0 z*pkLHYK<{!)EKHwLri1P7+ZfbCjMajKaBm!V50tDu=w8YyuH2cp)oP>9lM{I&%8Hp zXLj~8gA7MHeVQiNbm6WE5mF5|x7&qwgpg0iJ4G?pw^^Ls9SZ#nWrv<>Jc~e?al4l|Sbrr}2@GURkPzG*L^O6Z1o0 zZQxR4^6J;qwR=BlPwiV9O)S*Bz9|f2E}l&r6A9CtoKB?29A1Vu*s!Ds2$jnW)gtYFeN| zw>bJ9NW=J%e$Dv}pkqi2l>63vMIiy&S@4|!eIB;WL6Hf?87P^7(iCi;g0dIDpM>&p zsEEUkQP?>GmCpm5hF#CW9mBBu8Q3!jcShl^eyHk$y%D(k1O&RFx)bi{fP35Ez7W*h zkWl-Tg!{jg@W2-m>eeJY_?d)#*Cagjsf7Kj5+1%P;lLFM^&d-USdnn>BMHF|B|P%J zgvR$IG`%C?(AyFoeM>^~n-UJcA>pytBpkUYq2*Nxk6)1R#Il5==Oi3klJMlMML52( z2v7a7XwT0Ej{O*3{0;c8oWtc+FKUE{_`iE4SN`5rUdj33Z0r68yRN3OAn5oGS#RAA zxJNnqpU>-#4(9V)=|YjCv-$qTj^5_;C64aq^QEGY{^|IovTo-4mpS`TKL77@N<+O^ zQtOucA&szjr7z6aS%us49#Q^Y-RwoakPgNa@6|8bq{!c^gXb0R)y;Pm@72d^$QRN< zVRW48Ywhi67e;^dWP7+{C>l0UD4uTZ3LAs1ZIQ5n+JZZ+5$-lRqpiJRqq`$2jIPMZ zw$_Mova@p_JeYIbQqTTIrj!agisuqHha-K=)30E5VcLw1ieT2v*qG!}Ds3i2FustA zO;3(l1@uLXnK2QZNX-V5v24=j&5X^=B{JE`bSkf6#6>WXG{!Tr>4cGtqbJuy&`ivm zIHCW61+Wj=b9mq9?~>78U%5oIuehxiE7rcFNM5&$d|u;yjrTCtW7>b|EW`Qvyu-Mz z`lWcv&GCGWIfNX2Dkx5t@p@-uf7R^7Gf#R)doSnb^BE(xlX3qX$MevFZNKALiR1Y^ z$GBCz)hXWERNoxW=RZb1@3Fr}7Q_i`*mUJ*y<+5jlAoXRFg}a%boS#q>l!1CkBrv{ zkKbm67{>xV6UTec;nnP@kmrqQTE^~pKF={Wdj{;yk6V`&&$7tpK1QB@&gbbaFE{%T t^8Y9M)xhXH4|s8YUVn6E