mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-06 14:00:16 +02:00
Ryan Houdek
abb8de0966
These need to be bit-exact following exactly what is shown in the assembly. libunwind parses where EIP is to see if it is in a stack frame. Also needsto live in VDSO otherwise backtrace doesn't work.
67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
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/*
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$info$
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tags: thunklibs|VDSO
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desc: Linux VDSO thunking
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$end_info$
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*/
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#include <stdio.h>
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#include <cstring>
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#include <sched.h>
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#include <sys/time.h>
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#include <time.h>
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#include "Types.h"
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#include "common/Guest.h"
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#include "thunkgen_guest_libVDSO.inl"
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extern "C" {
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time_t __vdso_time(time_t *tloc) __attribute__((alias("fexfn_pack_time")));
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int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz) __attribute__((alias("fexfn_pack_gettimeofday")));
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int __vdso_clock_gettime(clockid_t, struct timespec *) __attribute__((alias("fexfn_pack_clock_gettime")));
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int __vdso_clock_getres(clockid_t, struct timespec *) __attribute__((alias("fexfn_pack_clock_getres")));
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int __vdso_getcpu(uint32_t *, uint32_t *) __attribute__((alias("fexfn_pack_getcpu")));
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#if __SIZEOF_POINTER__ == 4
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int __vdso_clock_gettime64(clockid_t, struct timespec64 *) __attribute__((alias("fexfn_pack_clock_gettime64")));
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__attribute__((naked))
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int __kernel_vsyscall() {
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asm volatile(R"(
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.intel_syntax noprefix
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int 0x80;
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ret;
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.att_syntax prefix
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)"
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::: "memory");
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}
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__attribute__((naked))
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void __kernel_sigreturn() {
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asm volatile(R"(
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.intel_syntax noprefix
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pop eax;
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mov eax, 0x77;
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int 0x80;
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nop;
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.att_syntax prefix
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)"
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::: "memory");
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}
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__attribute__((naked))
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void __kernel_rt_sigreturn() {
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asm volatile(R"(
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.intel_syntax noprefix
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mov eax, 0xad;
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int 0x80;
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.att_syntax prefix
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)"
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::: "memory");
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}
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#endif
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}
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