mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-07-07 11:48:30 +00:00
Add x86_64-linux-gnu emulator
I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
This commit is contained in:
Justine Tunney
parent
467504308a
commit
f4f4caab0e
1052 changed files with 65667 additions and 7825 deletions
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@ -29,4 +29,4 @@ abort: push %bp
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mov %sp,%bp
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rlcall panic
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int3
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.endfn abort,weak,protected
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.endfn abort,weak
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns 𝑥+𝑦, aborting on overflow.
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/
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns 𝑥+𝑦, aborting on overflow.
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/
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns 𝑥+𝑦, aborting on overflow.
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/
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@ -30,8 +30,9 @@
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/ @see -ftrapv
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__addvti3:
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mov %rdi,%rax
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add %rsi,%rax
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adc %rdi,%rdx
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add %rdx,%rax
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mov %rsi,%rdx
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adc %rcx,%rdx
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jo 1f
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ret
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1: push %rbp
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@ -28,6 +28,7 @@
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/ @mode long,legacy,real
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/ @noreturn
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__assert_fail:
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int3
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push %bp
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mov %sp,%bp
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rlcall panic
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@ -24,7 +24,6 @@
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/ Returns address of errno variable.
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/ @note this isn't a universal definition
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__errno_location:
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.leafprologue
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lea errno(%rip),%rax
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.leafepilogue
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ezlea errno,ax
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ret
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.endfn __errno_location,globl,hidden
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@ -32,6 +32,7 @@
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/ @noreturn
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_exit: push %bp
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mov %sp,%bp
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.weak _Exit
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rlcall _Exit
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int3
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.endfn _exit,weak,protected
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.endfn _exit,weak
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@ -34,15 +34,13 @@
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__privileged_start = 0
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__test_start = 0
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__ro = 0
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__piro_start = 0
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__relo_start = 0
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__relo_end = 0
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__piro_end = 0
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.globl _base
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.globl ape.xlm
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.globl __piro_start
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.globl __relo_start
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.globl __relo_end
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.globl __piro_end
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.globl __privileged_start
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.globl __ro
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.globl __test_start
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@ -54,9 +52,8 @@
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.weak _base
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.weak ape.xlm
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.weak __piro_start
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.weak __relo_start
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.weak __relo_end
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.weak __piro_end
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.weak __privileged_start
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.weak __ro
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.weak __test_start
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns 𝑥*𝑦, aborting on overflow.
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/
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@ -31,6 +31,11 @@
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__mulvdi3:
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mov %rdi,%rax
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imul %rsi
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jc __on_arithmetic_overflow
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jc 1f
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ret
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1: push %rbp
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mov %rsp,%rbp
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call __on_arithmetic_overflow
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pop %rbp
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ret
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.endfn __mulvdi3,globl
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns 𝑥*𝑦, aborting on overflow.
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/
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@ -31,6 +31,11 @@
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__mulvsi3:
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mov %edi,%eax
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imul %esi
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jc __on_arithmetic_overflow
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jc 1f
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ret
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1: push %rbp
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mov %rsp,%rbp
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call __on_arithmetic_overflow
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pop %rbp
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ret
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.endfn __mulvsi3,globl
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@ -18,27 +18,119 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns 𝑥*𝑦, aborting on overflow.
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/
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/ TODO(jart): is this ok?
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/
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/ @param rdi:rsi is int128 𝑥
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/ @param rdx:rcx is int128 𝑦
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/ @return rdx:rax is 𝑥*𝑦
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/ @see -ftrapv
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__mulvti3:
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push %rbp
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mov %rsp,%rbp
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push %rbx
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push %rbx
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push %r12
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push %r13
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push %r14
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push %r15
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mov %rdx,%r10
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mov %rdi,%rdx
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xor %r11d,%r11d
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mov %r10,%rax
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sar $63,%rdx
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sar $63,%rax
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cmp %rsi,%rdx
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jne 4f
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cmp %rcx,%rax
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jne 5f
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mov %rdi,%rax
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imul %r10
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mov %rax,%r14
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mov %rdx,%r8
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jmp 2f
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5: mov %r10,%r12
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mov %rcx,%r13
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mov %rcx,%r8
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mov %rdi,%rbx
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jmp 6f
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4: cmp %rcx,%rax
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jne 7f
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mov %rdi,%r12
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mov %rsi,%r13
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mov %rsi,%r8
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mov %r10,%rbx
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6: mov %rdi,%rax
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mul %r10
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mov %rax,%r14
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mov %rbx,%rax
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mov %rdx,%r15
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mul %r8
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test %r8,%r8
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jns 8f
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xor %r8d,%r8d
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sub %r8,%rax
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sbb %rbx,%rdx
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8: test %rbx,%rbx
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jns 9f
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sub %r12,%rax
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sbb %r13,%rdx
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9: mov %r15,%r8
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xor %r9d,%r9d
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add %rax,%r8
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adc %rdx,%r9
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mov %r8,%rdx
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sar $63,%rdx
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cmp %r9,%rdx
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je 2f
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imul %r10,%rsi
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mov %rdi,%rax
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imul %rdx,%rsi
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imul %rdi,%rcx
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add %rsi,%rcx
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mul %rdx
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jc 1f
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add %rcx,%rdx
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jo 1f
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mul %r10
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lea (%rsi,%rcx),%r8
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add %rdx,%r8
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mov %rax,%r14
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jmp 3f
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7: mov %rsi,%r8
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mov %rcx,%rdx
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mov %rdi,%rax
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imul %rdi,%rdx
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imul %r10,%r8
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add %rdx,%r8
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mul %r10
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mov %rax,%r14
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lea 1(%rsi),%rax
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add %rdx,%r8
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cmp $1,%rax
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ja 3f
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lea 1(%rcx),%rax
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cmp $1,%rax
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ja 3f
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cmp %rcx,%rsi
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jne 11f
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cmp %r14,%r11
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mov %r11,%rax
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sbb %r8,%rax
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jl 2f
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jmp 3f
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11: test %r8,%r8
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js 2f
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3: mov $1,%r11d
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2: test %r11,%r11
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je 1f
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mov %r8,-8(%rbp)
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call __on_arithmetic_overflow
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mov -8(%rbp),%r8
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1: mov %r14,%rax
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mov %r8,%rdx
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pop %r15
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pop %r14
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pop %r13
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pop %r12
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pop %rbx
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leave
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ret
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1: jmp __on_arithmetic_overflow
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.endfn __mulvti3,globl
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns -𝑥, aborting on overflow (two's complement bane).
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/
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns -𝑥, aborting on overflow (two's complement bane).
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/
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@ -18,9 +18,9 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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.text.likely
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.source __FILE__
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.privileged
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.alignfunc
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/ Returns -𝑥, aborting on overflow.
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/
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@ -31,11 +31,14 @@ __negvti2:
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mov %rdi,%rax
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mov %rsi,%rdx
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neg %rax
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not %rdx
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cmc
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adc $0,%rdx
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/ TODO(jart): Make sure this is correct.
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jo 1f
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neg %rdx
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jo 1f
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ret
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1: jmp __on_arithmetic_overflow
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1: push %rbp
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mov %rsp,%rbp
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call __on_arithmetic_overflow
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pop %rbp
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ret
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.endfn __negvti2,globl
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@ -18,12 +18,10 @@
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.text.unlikely
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.privileged
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.source __FILE__
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/ Arithmetic overflow handler.
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/
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/ @see libc/testlib/arithmeticoverflowhook.S
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/ @see -ftrapv
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__on_arithmetic_overflow:
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push %rbp
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@ -30,4 +30,4 @@ panic: push %bp
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cli
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1: hlt
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jmp 1b
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.endfn panic,weak,protected
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.endfn panic,weak
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@ -17,20 +17,10 @@
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "ape/macros.h"
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.real
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.source __FILE__
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.code16 # ∩ .code32 ∩ .code64
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#include "libc/macros.h"
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/ Thrice re-imagined Unix user process termination API stub.
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/
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/ @param edi is exit code ∈ [0,256)
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/ @see libc/runtime/_exit.c
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/ @mode long,legacy,real
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/ @asyncsignalsafe
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/ @noreturn
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_Exit: push %bp
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mov %sp,%bp
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rlcall panic
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int3
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.endfn _Exit,weak,protected
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/ See -mfunction-return=thunk
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__x86_return_thunk:
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ret
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.endfn __x86_return_thunk,weak
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.source __FILE__
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41
libc/stubs/stackchkguard.S
Normal file
41
libc/stubs/stackchkguard.S
Normal file
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@ -0,0 +1,41 @@
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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||||
╞══════════════════════════════════════════════════════════════════════════════╡
|
||||
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
||||
│ │
|
||||
│ This program is free software; you can redistribute it and/or modify │
|
||||
│ it under the terms of the GNU General Public License as published by │
|
||||
│ the Free Software Foundation; version 2 of the License. │
|
||||
│ │
|
||||
│ This program 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 │
|
||||
│ General Public License for more details. │
|
||||
│ │
|
||||
│ You should have received a copy of the GNU General Public License │
|
||||
│ along with this program; if not, write to the Free Software │
|
||||
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
|
||||
│ 02110-1301 USA │
|
||||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||||
#include "libc/macros.h"
|
||||
#include "libc/notice.inc"
|
||||
.source __FILE__
|
||||
|
||||
/ Canary for -fstack-protector.
|
||||
/
|
||||
/ This global is referenced by synthetic code generated by GCC.
|
||||
/ The -mstack-protector-guard=global flag might need to be passed.
|
||||
/
|
||||
/ @note this value is protected by piro
|
||||
.initbss 200,_init___stack_chk_guard
|
||||
__stack_chk_guard:
|
||||
.quad 0
|
||||
.endobj __stack_chk_guard,globl
|
||||
.previous
|
||||
|
||||
.init.start 301,_init___stack_chk_guard
|
||||
rdtsc
|
||||
stosl
|
||||
xchg %edx,%eax
|
||||
stosl
|
||||
.init.end 301,_init___stack_chk_guard
|
||||
|
|
@ -17,7 +17,7 @@ PKGS += LIBC_STUBS
|
|||
|
||||
LIBC_STUBS_ARTIFACTS += LIBC_STUBS_A
|
||||
LIBC_STUBS = $(LIBC_STUBS_A)
|
||||
LIBC_STUBS_A = o/libc/stubs/stubs.a
|
||||
LIBC_STUBS_A = o/$(MODE)/libc/stubs/stubs.a
|
||||
LIBC_STUBS_A_FILES := $(wildcard libc/stubs/*.S)
|
||||
|
||||
LIBC_STUBS_A_HDRS = \
|
||||
|
|
@ -28,7 +28,7 @@ LIBC_STUBS_A_SRCS = \
|
|||
|
||||
LIBC_STUBS_A_OBJS = \
|
||||
$(LIBC_STUBS_A_SRCS:%=o/$(MODE)/%.zip.o) \
|
||||
$(LIBC_STUBS_A_SRCS:%.S=o/%.o)
|
||||
$(LIBC_STUBS_A_SRCS:%.S=o/$(MODE)/%.o)
|
||||
|
||||
LIBC_STUBS_A_CHECKS = \
|
||||
$(LIBC_STUBS_A).pkg \
|
||||
|
|
@ -47,7 +47,7 @@ LIBC_STUBS_LIBS = $(foreach x,$(LIBC_STUBS_ARTIFACTS),$($(x)))
|
|||
LIBC_STUBS_SRCS = $(foreach x,$(LIBC_STUBS_ARTIFACTS),$($(x)_SRCS))
|
||||
LIBC_STUBS_CHECKS = $(foreach x,$(LIBC_STUBS_ARTIFACTS),$($(x)_CHECKS))
|
||||
LIBC_STUBS_OBJS = $(foreach x,$(LIBC_STUBS_ARTIFACTS),$($(x)_OBJS))
|
||||
$(LIBC_STUBS_OBJS): $(BUILD_FILES) libc/stubs/stubs.mk
|
||||
|
||||
.PHONY: o/libc/stubs
|
||||
o/libc/stubs: $(LIBC_STUBS_CHECKS)
|
||||
.PHONY: o/$(MODE)/libc/stubs
|
||||
o/$(MODE)/libc/stubs: \
|
||||
$(LIBC_STUBS_CHECKS)
|
||||
|
|
|
|||
|
|
@ -18,9 +18,9 @@
|
|||
│ 02110-1301 USA │
|
||||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||||
#include "libc/macros.h"
|
||||
.align 16
|
||||
.text.likely
|
||||
.source __FILE__
|
||||
.privileged
|
||||
.alignfunc
|
||||
|
||||
/ Returns 𝑥-𝑦, aborting on overflow.
|
||||
/
|
||||
|
|
|
|||
|
|
@ -18,9 +18,9 @@
|
|||
│ 02110-1301 USA │
|
||||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||||
#include "libc/macros.h"
|
||||
.align 16
|
||||
.text.likely
|
||||
.source __FILE__
|
||||
.privileged
|
||||
.alignfunc
|
||||
|
||||
/ Returns 𝑥-𝑦, aborting on overflow.
|
||||
/
|
||||
|
|
|
|||
|
|
@ -18,9 +18,9 @@
|
|||
│ 02110-1301 USA │
|
||||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||||
#include "libc/macros.h"
|
||||
.align 16
|
||||
.text.likely
|
||||
.source __FILE__
|
||||
.privileged
|
||||
.alignfunc
|
||||
|
||||
/ Returns 𝑥-𝑦, aborting on overflow.
|
||||
/
|
||||
|
|
@ -30,8 +30,9 @@
|
|||
/ @see -ftrapv
|
||||
__subvti3:
|
||||
mov %rdi,%rax
|
||||
sub %rsi,%rax
|
||||
sbb %rdi,%rdx
|
||||
sub %rdx,%rax
|
||||
mov %rsi,%rdx
|
||||
sbb %rcx,%rdx
|
||||
jo 1f
|
||||
ret
|
||||
1: push %rbp
|
||||
|
|
|
|||
63
libc/stubs/sysv2nt.S
Normal file
63
libc/stubs/sysv2nt.S
Normal file
|
|
@ -0,0 +1,63 @@
|
|||
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
|
||||
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
|
||||
╞══════════════════════════════════════════════════════════════════════════════╡
|
||||
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
||||
│ │
|
||||
│ This program is free software; you can redistribute it and/or modify │
|
||||
│ it under the terms of the GNU General Public License as published by │
|
||||
│ the Free Software Foundation; version 2 of the License. │
|
||||
│ │
|
||||
│ This program 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 │
|
||||
│ General Public License for more details. │
|
||||
│ │
|
||||
│ You should have received a copy of the GNU General Public License │
|
||||
│ along with this program; if not, write to the Free Software │
|
||||
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
|
||||
│ 02110-1301 USA │
|
||||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||||
#include "libc/macros.h"
|
||||
.text.windows
|
||||
|
||||
/ Epilogues for calling functions w/ Microsoft x64 convention.
|
||||
/
|
||||
/ @param %rax is address of windows x64 function to call
|
||||
/ @param %rsi is ignored
|
||||
/ @param %rdx,%rcx,%r8,%r9,stack are params (unlimited)
|
||||
/ @param %xmm0,%xmm1,%xmm2 are double params (limited to 3)
|
||||
/ @return is in %rax, %xmm0, or %st
|
||||
/ @note GCC 4.8+ and Clang can avoid this indirection
|
||||
/ @note thunk that jumps here must setup frame
|
||||
/ @note this is so much faster than nt2sysv()
|
||||
__sysv2nt14:
|
||||
pushq 72(%rbp)
|
||||
pushq 64(%rbp)
|
||||
__sysv2nt12:
|
||||
pushq 56(%rbp)
|
||||
pushq 48(%rbp)
|
||||
__sysv2nt10:
|
||||
pushq 40(%rbp)
|
||||
pushq 32(%rbp)
|
||||
__sysv2nt8:
|
||||
pushq 24(%rbp)
|
||||
pushq 16(%rbp)
|
||||
__sysv2nt6:
|
||||
push %r9
|
||||
push %r8
|
||||
__sysv2nt:
|
||||
mov %rdx,%r8
|
||||
mov %rcx,%r9
|
||||
mov %rdi,%rcx
|
||||
mov %rsi,%rdx
|
||||
sub $32,%rsp
|
||||
call *%rax
|
||||
leave
|
||||
ret
|
||||
.endfn __sysv2nt,globl,hidden
|
||||
.endfn __sysv2nt6,globl,hidden
|
||||
.endfn __sysv2nt8,globl,hidden
|
||||
.endfn __sysv2nt10,globl,hidden
|
||||
.endfn __sysv2nt12,globl,hidden
|
||||
.endfn __sysv2nt14,globl,hidden
|
||||
.source __FILE__
|
||||
|
|
@ -18,9 +18,33 @@
|
|||
│ 02110-1301 USA │
|
||||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||||
#include "libc/macros.h"
|
||||
#include "ape/relocations.h"
|
||||
#include "libc/zip.h"
|
||||
|
||||
/ ZIP Central Directory.
|
||||
.section .piro.data.sort.zip.3,"a",@progbits
|
||||
.hidden __zip_start
|
||||
.globl __zip_start
|
||||
.type __zip_start,@object
|
||||
.align kZipCdirAlign
|
||||
__zip_start:
|
||||
.endfn __zip_start,weak
|
||||
|
||||
.previous/*
|
||||
...
|
||||
decentralized content
|
||||
...
|
||||
*/.section .piro.data.sort.zip.5,"a",@progbits
|
||||
.align kZipCdirAlign
|
||||
__zip_end:
|
||||
.endfn __zip_end,weak
|
||||
.long kZipCdirHdrMagic # magic
|
||||
.short 0 # disk
|
||||
.short 0 # starting disk
|
||||
.short v_zip_records # records on disk
|
||||
.short v_zip_records # records
|
||||
.long v_zip_cdirsize # size of central directory
|
||||
.long RVA(__zip_start) # central directory offset
|
||||
.short v_zip_commentsize # comment size
|
||||
.endobj __zip_end,globl,hidden
|
||||
.weak v_zip_records
|
||||
.weak v_zip_cdirsize
|
||||
.weak v_zip_commentsize
|
||||
.previous
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue