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Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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include $(BUILD_DIR)/tests/tcg/riscv64-linux-user/config-target.mak | ||
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SUBDIR = $(SRC_PATH)/linux-user/riscv | ||
VPATH += $(SUBDIR) | ||
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all: $(SUBDIR)/vdso-32.so $(SUBDIR)/vdso-64.so | ||
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LDFLAGS = -nostdlib -shared -fpic -Wl,-h,linux-vdso.so.1 -Wl,--build-id=sha1 \ | ||
-Wl,--hash-style=both -Wl,-T,$(SUBDIR)/vdso.ld | ||
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$(SUBDIR)/vdso-32.so: vdso.S vdso.ld vdso-asmoffset.h | ||
$(CC) -o $@ $(LDFLAGS) -mabi=ilp32d -march=rv32g $< | ||
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$(SUBDIR)/vdso-64.so: vdso.S vdso.ld vdso-asmoffset.h | ||
$(CC) -o $@ $(LDFLAGS) -mabi=lp64d -march=rv64g $< |
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vdso_32_inc = gen_vdso.process('vdso-32.so', | ||
extra_args: ['-r', '__vdso_rt_sigreturn']) | ||
vdso_64_inc = gen_vdso.process('vdso-64.so', | ||
extra_args: ['-r', '__vdso_rt_sigreturn']) | ||
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linux_user_ss.add(when: 'TARGET_RISCV32', if_true: vdso_32_inc) | ||
linux_user_ss.add(when: 'TARGET_RISCV64', if_true: vdso_64_inc) |
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#ifdef TARGET_ABI32 | ||
# define sizeof_rt_sigframe 0x2b0 | ||
# define offsetof_uc_mcontext 0x120 | ||
# define offsetof_freg0 0x80 | ||
#else | ||
# define sizeof_rt_sigframe 0x340 | ||
# define offsetof_uc_mcontext 0x130 | ||
# define offsetof_freg0 0x100 | ||
#endif |
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/* | ||
* RISC-V linux replacement vdso. | ||
* | ||
* Copyright 2021 Linaro, Ltd. | ||
* | ||
* SPDX-License-Identifier: GPL-2.0-or-later | ||
*/ | ||
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#include <asm/unistd.h> | ||
#include <asm/errno.h> | ||
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#if __riscv_xlen == 32 | ||
# define TARGET_ABI32 | ||
#endif | ||
#include "vdso-asmoffset.h" | ||
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.text | ||
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.macro endf name | ||
.globl \name | ||
.type \name, @function | ||
.size \name, . - \name | ||
.endm | ||
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.macro raw_syscall nr | ||
li a7, \nr | ||
ecall | ||
.endm | ||
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.macro vdso_syscall name, nr | ||
\name: | ||
raw_syscall \nr | ||
ret | ||
endf \name | ||
.endm | ||
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__vdso_gettimeofday: | ||
.cfi_startproc | ||
#ifdef __NR_gettimeofday | ||
raw_syscall __NR_gettimeofday | ||
ret | ||
#else | ||
/* No gettimeofday, fall back to clock_gettime64. */ | ||
beq a1, zero, 1f | ||
sw zero, 0(a1) /* tz->tz_minuteswest = 0 */ | ||
sw zero, 4(a1) /* tz->tz_dsttime = 0 */ | ||
1: addi sp, sp, -32 | ||
.cfi_adjust_cfa_offset 32 | ||
sw a0, 16(sp) /* save tv */ | ||
mv a0, sp | ||
raw_syscall __NR_clock_gettime64 | ||
lw t0, 0(sp) /* timespec.tv_sec.low */ | ||
lw t1, 4(sp) /* timespec.tv_sec.high */ | ||
lw t2, 8(sp) /* timespec.tv_nsec.low */ | ||
lw a1, 16(sp) /* restore tv */ | ||
addi sp, sp, 32 | ||
.cfi_adjust_cfa_offset -32 | ||
bne a0, zero, 9f /* syscall error? */ | ||
li a0, -EOVERFLOW | ||
bne t1, zero, 9f /* y2038? */ | ||
li a0, 0 | ||
li t3, 1000 | ||
divu t2, t2, t3 /* nsec -> usec */ | ||
sw t0, 0(a1) /* tz->tv_sec */ | ||
sw t2, 4(a1) /* tz->tv_usec */ | ||
9: ret | ||
#endif | ||
.cfi_endproc | ||
endf __vdso_gettimeofday | ||
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.cfi_startproc | ||
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#ifdef __NR_clock_gettime | ||
vdso_syscall __vdso_clock_gettime, __NR_clock_gettime | ||
#else | ||
vdso_syscall __vdso_clock_gettime, __NR_clock_gettime64 | ||
#endif | ||
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#ifdef __NR_clock_getres | ||
vdso_syscall __vdso_clock_getres, __NR_clock_getres | ||
#else | ||
vdso_syscall __vdso_clock_getres, __NR_clock_getres_time64 | ||
#endif | ||
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vdso_syscall __vdso_getcpu, __NR_getcpu | ||
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__vdso_flush_icache: | ||
/* qemu does not need to flush the icache */ | ||
li a0, 0 | ||
ret | ||
endf __vdso_flush_icache | ||
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.cfi_endproc | ||
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/* | ||
* Start the unwind info at least one instruction before the signal | ||
* trampoline, because the unwinder will assume we are returning | ||
* after a call site. | ||
*/ | ||
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.cfi_startproc simple | ||
.cfi_signal_frame | ||
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#define sizeof_reg (__riscv_xlen / 4) | ||
#define sizeof_freg 8 | ||
#define B_GR (offsetof_uc_mcontext - sizeof_rt_sigframe) | ||
#define B_FR (offsetof_uc_mcontext - sizeof_rt_sigframe + offsetof_freg0) | ||
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.cfi_def_cfa 2, sizeof_rt_sigframe | ||
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/* Return address */ | ||
.cfi_return_column 64 | ||
.cfi_offset 64, B_GR + 0 /* pc */ | ||
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/* Integer registers */ | ||
.cfi_offset 1, B_GR + 1 * sizeof_reg /* r1 (ra) */ | ||
.cfi_offset 2, B_GR + 2 * sizeof_reg /* r2 (sp) */ | ||
.cfi_offset 3, B_GR + 3 * sizeof_reg | ||
.cfi_offset 4, B_GR + 4 * sizeof_reg | ||
.cfi_offset 5, B_GR + 5 * sizeof_reg | ||
.cfi_offset 6, B_GR + 6 * sizeof_reg | ||
.cfi_offset 7, B_GR + 7 * sizeof_reg | ||
.cfi_offset 8, B_GR + 8 * sizeof_reg | ||
.cfi_offset 9, B_GR + 9 * sizeof_reg | ||
.cfi_offset 10, B_GR + 10 * sizeof_reg | ||
.cfi_offset 11, B_GR + 11 * sizeof_reg | ||
.cfi_offset 12, B_GR + 12 * sizeof_reg | ||
.cfi_offset 13, B_GR + 13 * sizeof_reg | ||
.cfi_offset 14, B_GR + 14 * sizeof_reg | ||
.cfi_offset 15, B_GR + 15 * sizeof_reg | ||
.cfi_offset 16, B_GR + 16 * sizeof_reg | ||
.cfi_offset 17, B_GR + 17 * sizeof_reg | ||
.cfi_offset 18, B_GR + 18 * sizeof_reg | ||
.cfi_offset 19, B_GR + 19 * sizeof_reg | ||
.cfi_offset 20, B_GR + 20 * sizeof_reg | ||
.cfi_offset 21, B_GR + 21 * sizeof_reg | ||
.cfi_offset 22, B_GR + 22 * sizeof_reg | ||
.cfi_offset 23, B_GR + 23 * sizeof_reg | ||
.cfi_offset 24, B_GR + 24 * sizeof_reg | ||
.cfi_offset 25, B_GR + 25 * sizeof_reg | ||
.cfi_offset 26, B_GR + 26 * sizeof_reg | ||
.cfi_offset 27, B_GR + 27 * sizeof_reg | ||
.cfi_offset 28, B_GR + 28 * sizeof_reg | ||
.cfi_offset 29, B_GR + 29 * sizeof_reg | ||
.cfi_offset 30, B_GR + 30 * sizeof_reg | ||
.cfi_offset 31, B_GR + 31 * sizeof_reg /* r31 */ | ||
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.cfi_offset 32, B_FR + 0 /* f0 */ | ||
.cfi_offset 33, B_FR + 1 * sizeof_freg /* f1 */ | ||
.cfi_offset 34, B_FR + 2 * sizeof_freg | ||
.cfi_offset 35, B_FR + 3 * sizeof_freg | ||
.cfi_offset 36, B_FR + 4 * sizeof_freg | ||
.cfi_offset 37, B_FR + 5 * sizeof_freg | ||
.cfi_offset 38, B_FR + 6 * sizeof_freg | ||
.cfi_offset 39, B_FR + 7 * sizeof_freg | ||
.cfi_offset 40, B_FR + 8 * sizeof_freg | ||
.cfi_offset 41, B_FR + 9 * sizeof_freg | ||
.cfi_offset 42, B_FR + 10 * sizeof_freg | ||
.cfi_offset 43, B_FR + 11 * sizeof_freg | ||
.cfi_offset 44, B_FR + 12 * sizeof_freg | ||
.cfi_offset 45, B_FR + 13 * sizeof_freg | ||
.cfi_offset 46, B_FR + 14 * sizeof_freg | ||
.cfi_offset 47, B_FR + 15 * sizeof_freg | ||
.cfi_offset 48, B_FR + 16 * sizeof_freg | ||
.cfi_offset 49, B_FR + 17 * sizeof_freg | ||
.cfi_offset 50, B_FR + 18 * sizeof_freg | ||
.cfi_offset 51, B_FR + 19 * sizeof_freg | ||
.cfi_offset 52, B_FR + 20 * sizeof_freg | ||
.cfi_offset 53, B_FR + 21 * sizeof_freg | ||
.cfi_offset 54, B_FR + 22 * sizeof_freg | ||
.cfi_offset 55, B_FR + 23 * sizeof_freg | ||
.cfi_offset 56, B_FR + 24 * sizeof_freg | ||
.cfi_offset 57, B_FR + 25 * sizeof_freg | ||
.cfi_offset 58, B_FR + 26 * sizeof_freg | ||
.cfi_offset 59, B_FR + 27 * sizeof_freg | ||
.cfi_offset 60, B_FR + 28 * sizeof_freg | ||
.cfi_offset 61, B_FR + 29 * sizeof_freg | ||
.cfi_offset 62, B_FR + 30 * sizeof_freg | ||
.cfi_offset 63, B_FR + 31 * sizeof_freg /* f31 */ | ||
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nop | ||
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__vdso_rt_sigreturn: | ||
raw_syscall __NR_rt_sigreturn | ||
endf __vdso_rt_sigreturn | ||
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.cfi_endproc |
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/* | ||
* Linker script for linux riscv replacement vdso. | ||
* | ||
* Copyright 2021 Linaro, Ltd. | ||
* | ||
* SPDX-License-Identifier: GPL-2.0-or-later | ||
*/ | ||
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VERSION { | ||
LINUX_4.15 { | ||
global: | ||
__vdso_rt_sigreturn; | ||
__vdso_gettimeofday; | ||
__vdso_clock_gettime; | ||
__vdso_clock_getres; | ||
__vdso_getcpu; | ||
__vdso_flush_icache; | ||
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local: *; | ||
}; | ||
} | ||
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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); | ||
} | ||
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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; | ||
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/* | ||
* 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.*) | ||
} | ||
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.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 | ||
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.text : { *(.text*) } :load =0xd503201f | ||
} |