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This change progresses our AARCH64 support:

- The AARCH64 build and tests are now passing
- Add 128-bit floating-point support to printf()
- Fix clone() so it initializes cosmo's x28 TLS register
- Fix TLS memory layout issue with aarch64 _Alignas vars
- Revamp microbenchmarking tools so they work on aarch64
- Make some subtle improvements to aarch64 crash reporting
- Make kisdangerous() memory checks more accurate on aarch64
- Remove sys_open() since it's not available on Linux AARCH64

This change makes general improvements to Cosmo and Redbean:

- Introduce GetHostIsa() function in Redbean
- You can now feature check using pledge(0, 0)
- You can now feature check using unveil("",0)
- Refactor some more x86-specific asm comments
- Refactor and write docs for some libm functions
- Make the mmap() API behave more similar to Linux
- Fix WIFSIGNALED() which wrongly returned true for zero
- Rename some obscure cosmo keywords from noFOO to dontFOO
This commit is contained in:
Justine Tunney 2023-06-03 08:12:13 -07:00
parent 5655c9a4e7
commit 8f522cb702
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GPG key ID: BE714B4575D6E328
116 changed files with 1194 additions and 1025 deletions
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88
libc/runtime/openexecutable.S
View file

@ -33,50 +33,50 @@
_OpenExecutable:
push %rbp
mov %rsp,%rbp
pushq __NR_open(%rip) # -0x08(%rbp)
pushq __NR_mmap(%rip) # -0x10(%rbp)
pushq __NR_munmap(%rip) # -0x18(%rbp)
pushq O_RDWR(%rip) # -0x20(%rbp)
pushq MAP_ANONYMOUS(%rip) # -0x28(%rbp)
pushq MAP_PRIVATE(%rip) # -0x30(%rbp)
pushq MAP_FIXED(%rip) # -0x38(%rbp)
pushq __NR_mprotect(%rip) # -0x40(%rbp)
pushq O_RDONLY(%rip) # -0x48(%rbp)
push %rbx # code buffer
push %r12 # data buffer
push %r14 # filename
push %r15 # fd
pushq __NR_open(%rip) // -0x08(%rbp)
pushq __NR_mmap(%rip) // -0x10(%rbp)
pushq __NR_munmap(%rip) // -0x18(%rbp)
pushq O_RDWR(%rip) // -0x20(%rbp)
pushq MAP_ANONYMOUS(%rip) // -0x28(%rbp)
pushq MAP_PRIVATE(%rip) // -0x30(%rbp)
pushq MAP_FIXED(%rip) // -0x38(%rbp)
pushq __NR_mprotect(%rip) // -0x40(%rbp)
pushq O_RDONLY(%rip) // -0x48(%rbp)
push %rbx // code buffer
push %r12 // data buffer
push %r14 // filename
push %r15 // fd
// Get filename.
lea program_executable_name(%rip),%r14
// Allocate code buffer.
mov -0x10(%rbp),%eax # __NR_mmap
mov -0x10(%rbp),%eax // __NR_mmap
xor %edi,%edi
mov $PAGESIZE,%esi
mov $PROT_READ|PROT_WRITE,%edx
mov -0x28(%rbp),%r10d # MAP_ANONYMOUS
or -0x30(%rbp),%r10d # MAP_PRIVATE
mov -0x28(%rbp),%r10d // MAP_ANONYMOUS
or -0x30(%rbp),%r10d // MAP_PRIVATE
mov $-1,%r8
mov $0,%r9
push %r9 # openbsd:pad
push %r9 # openbsd:align
push %r9 // openbsd:pad
push %r9 // openbsd:align
syscall
pop %r9
pop %r9
mov %rax,%rbx
// Allocate data buffer.
mov -0x10(%rbp),%eax # __NR_mmap
mov -0x10(%rbp),%eax // __NR_mmap
xor %edi,%edi
mov $ape_ram_filesz,%esi
mov $PROT_READ|PROT_WRITE,%edx
mov -0x28(%rbp),%r10d # MAP_ANONYMOUS
or -0x30(%rbp),%r10d # MAP_PRIVATE
mov -0x28(%rbp),%r10d // MAP_ANONYMOUS
or -0x30(%rbp),%r10d // MAP_PRIVATE
mov $-1,%r8
mov $0,%r9
push %r9 # openbsd:pad
push %r9 # openbsd:align
push %r9 // openbsd:pad
push %r9 // openbsd:align
syscall
pop %r9
pop %r9
@ -95,7 +95,7 @@ _OpenExecutable:
rep movsb
// Change protection.
mov -0x40(%rbp),%eax # __NR_mprotect
mov -0x40(%rbp),%eax // __NR_mprotect
mov %rbx,%rdi
mov $PAGESIZE,%esi
mov $PROT_READ|PROT_EXEC,%edx
@ -106,63 +106,63 @@ _OpenExecutable:
// <LIMBO>
// Unmap code segment.
8: mov -0x18(%rbp),%eax # __NR_munmap
8: mov -0x18(%rbp),%eax // __NR_munmap
mov $ape_rom_vaddr,%edi
mov $ape_rom_filesz,%esi
syscall
// Unmap data segment.
mov -0x18(%rbp),%eax # __NR_munmap
mov -0x18(%rbp),%eax // __NR_munmap
mov $ape_ram_vaddr,%edi
mov $ape_ram_filesz,%esi
syscall
// Open executable in read-write mode.
mov -0x08(%rbp),%eax # __NR_open
mov -0x08(%rbp),%eax // __NR_open
mov %r14,%rdi
mov -0x20(%rbp),%esi # O_RDWR
clc # clear carry flag
mov -0x20(%rbp),%esi // O_RDWR
clc // clear carry flag
syscall
jc .Lohno # bsd error
jc .Lohno // bsd error
cmp $-4095,%eax
jae .Lohno # linux error
jae .Lohno // linux error
jmp .Lok
// Open executable in read-only mode.
.Lohno: mov -0x08(%rbp),%eax # __NR_open
.Lohno: mov -0x08(%rbp),%eax // __NR_open
mov %r14,%rdi
mov -0x48(%rbp),%esi # O_RDONLY
mov -0x48(%rbp),%esi // O_RDONLY
syscall
.Lok: mov %eax,%r15d
// Map code segment.
mov -0x10(%rbp),%eax # __NR_mmap
mov -0x10(%rbp),%eax // __NR_mmap
mov $ape_rom_vaddr,%edi
mov $ape_rom_filesz,%esi
mov $PROT_READ|PROT_EXEC,%edx
mov -0x38(%rbp),%r10d # MAP_FIXED
or -0x30(%rbp),%r10d # MAP_PRIVATE
mov -0x38(%rbp),%r10d // MAP_FIXED
or -0x30(%rbp),%r10d // MAP_PRIVATE
mov %r15d,%r8d
mov $ape_rom_offset,%r9d
push %r9 # openbsd:pad
push %r9 # openbsd:align
push %r9 // openbsd:pad
push %r9 // openbsd:align
syscall
pop %r9
pop %r9
// Allocate data segment.
mov -0x10(%rbp),%eax # __NR_mmap
mov -0x10(%rbp),%eax // __NR_mmap
mov $ape_ram_vaddr,%edi
mov $ape_ram_filesz,%esi
mov $PROT_READ|PROT_WRITE,%edx
mov -0x38(%rbp),%r10d # MAP_FIXED
or -0x30(%rbp),%r10d # MAP_PRIVATE
or -0x28(%rbp),%r10d # MAP_ANONYMOUS
mov -0x38(%rbp),%r10d // MAP_FIXED
or -0x30(%rbp),%r10d // MAP_PRIVATE
or -0x28(%rbp),%r10d // MAP_ANONYMOUS
mov $-1,%r8
mov $0,%r9
push %r9 # openbsd:pad
push %r9 # openbsd:align
push %r9 // openbsd:pad
push %r9 // openbsd:align
syscall
pop %r9
pop %r9