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You can now say `gdb hello.com.dbg` and it'll work perfectly.
This commit is contained in:
Justine Tunney
parent
afc986f741
commit
fbc4fcbb71
18 changed files with 230 additions and 67 deletions
|
|
@ -259,6 +259,9 @@ SECTIONS {
|
|||
.debug_ranges 0 : { *(.debug_ranges) }
|
||||
.debug_macro 0 : { *(.debug_macro) }
|
||||
.debug_addr 0 : { *(.debug_addr) }
|
||||
.debug_names 0 : { *(.debug_names) }
|
||||
.debug_loclists 0 : { *(.debug_loclists) }
|
||||
.debug_str_offsets 0 : { *(.debug_str_offsets) }
|
||||
.ARM.attributes 0 : { KEEP(*(.ARM.attributes)) KEEP(*(.gnu.attributes)) }
|
||||
.note.gnu.arm.ident 0 : { KEEP(*(.note.gnu.arm.ident)) }
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||||
|
||||
|
|
|
|||
24
ape/ape.lds
24
ape/ape.lds
|
|
@ -386,6 +386,13 @@ SECTIONS {
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|||
_tbss_end = .;
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||||
} :Tls
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||||
|
||||
.eh_frame : {
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||||
__eh_frame_start = .;
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||||
KEEP(*(.eh_frame))
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||||
*(.eh_frame.*)
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||||
__eh_frame_end = .;
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||||
} :Ram
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||||
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||||
.data . : {
|
||||
/*BEGIN: Read/Write Data */
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||||
#if SupportsWindows()
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||||
|
|
@ -426,11 +433,6 @@ SECTIONS {
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|||
KEEP(*(.dtors))
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||||
__fini_array_end = .;
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||||
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||||
__eh_frame_start = .;
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||||
KEEP(*(.eh_frame))
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||||
*(.eh_frame.*)
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||||
__eh_frame_end = .;
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||||
|
||||
/*BEGIN: Post-Initialization Read-Only */
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||||
. = ALIGN(. != 0 ? __SIZEOF_POINTER__ : 0);
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KEEP(*(SORT_BY_NAME(.piro.relo.sort.*)))
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|
|
@ -439,7 +441,6 @@ SECTIONS {
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|||
KEEP(*(.piro.pad.data))
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||||
*(.igot.plt)
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KEEP(*(.dataepilogue))
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. = ALIGN(. != 0 ? CONSTANT(COMMONPAGESIZE) : 0);
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/*END: NT FORK COPYING */
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_edata = .;
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|
@ -519,6 +520,9 @@ SECTIONS {
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|||
.debug_rnglists 0 : { *(.debug_rnglists) }
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||||
.debug_macro 0 : { *(.debug_macro) }
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||||
.debug_addr 0 : { *(.debug_addr) }
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||||
.debug_names 0 : { *(.debug_names) }
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||||
.debug_loclists 0 : { *(.debug_loclists) }
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||||
.debug_str_offsets 0 : { *(.debug_str_offsets) }
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.gnu.attributes 0 : { KEEP(*(.gnu.attributes)) }
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.GCC.command.line 0 : { *(.GCC.command.line) }
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|
@ -582,11 +586,11 @@ ape_rom_memsz = ape_rom_filesz;
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ape_rom_align = CONSTANT(COMMONPAGESIZE);
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ape_rom_rva = RVA(ape_rom_vaddr);
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ape_ram_vaddr = ADDR(.data);
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ape_ram_vaddr = ADDR(.eh_frame);
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ape_ram_offset = ape_ram_vaddr - __executable_start;
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ape_ram_paddr = LOADADDR(.data);
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ape_ram_filesz = ADDR(.bss) - ADDR(.data);
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ape_ram_memsz = _end - ADDR(.data);
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ape_ram_paddr = LOADADDR(.eh_frame);
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ape_ram_filesz = ADDR(.bss) - ADDR(.eh_frame);
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ape_ram_memsz = _end - ADDR(.eh_frame);
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ape_ram_align = CONSTANT(COMMONPAGESIZE);
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ape_ram_rva = RVA(ape_ram_vaddr);
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|
|
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@ -28,8 +28,8 @@
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// @return rdi is rdi+edx
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.text.startup
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__getntsyspath:
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push %rbp
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mov %rsp,%rbp
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beg
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pro
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push %rdx
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movpp %rdi,%rcx # call f=%rax(p1=%rcx,p2=%rdx)
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sub $40,%rsp
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@ -55,6 +55,7 @@ __getntsyspath:
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jne 2f
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movb $'/',-1(%rdi)
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2: .loop 1b
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leave
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epi
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ret
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end
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.endfn __getntsyspath,globl,hidden
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|
|
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|
|
@ -47,7 +47,14 @@ __oops_win32:
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// @note ape.S and ape-loader both set RCX to XNU on Darwin
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// @noreturn
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_start:
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#ifdef __x86_64__
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.cfi_startproc
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#if defined(__x86_64__)
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.cfi_undefined rip
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#elif defined(__aarch64__)
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.cfi_undefined x30
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#endif /* __x86_64__ */
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#if defined(__x86_64__)
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#if SupportsFreebsd()
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// detect free besiyata dishmaya
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|
|
@ -159,4 +166,5 @@ _start:
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#else
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#error "architecture unsupported"
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||||
#endif /* __x86_64__ */
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.cfi_endproc
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.endfn _start,weak,hidden
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|
|
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|
|
@ -21,16 +21,15 @@
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.privileged
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cosmo_futex_thunk:
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beg
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||||
pro
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#ifdef __x86_64__
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push %rbp
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mov %rsp,%rbp
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mov %rcx,%r10
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mov __NR_futex,%eax
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clc
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syscall
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jnc 1f
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neg %eax
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1: pop %rbp
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#elif defined(__aarch64__)
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ldr x7,=__hostos
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ldr w7,[x7]
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@ -46,5 +45,7 @@ cosmo_futex_thunk:
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#else
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#error "unsupported architecture"
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#endif /* __x86_64__ */
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1: ret
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1: epi
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ret
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end
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.endfn cosmo_futex_thunk,globl,hidden
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|
|
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@ -26,7 +26,9 @@
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// @see setcontext()
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.ftrace1
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getcontext:
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beg
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||||
.ftrace2
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#include "libc/intrin/getcontext.inc"
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jmp __getcontextsig
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end
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.endfn getcontext,globl
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|
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@ -31,17 +31,17 @@
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// @returnstwice
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.ftrace1
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swapcontext:
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beg
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.ftrace2
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#include "libc/intrin/getcontext.inc"
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#ifdef __x86_64__
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push %rbp
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mov %rsp,%rbp
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push %rsi
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push %rsi
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pro
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cpush %rsi
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cpush %rsi
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call __swapcontextsig
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pop %rdi
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pop %rdi
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pop %rbp
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cpop %rdi
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cpop %rdi
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epi
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test %eax,%eax
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jnz 1f
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#elif defined(__aarch64__)
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@ -56,4 +56,5 @@ swapcontext:
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#endif
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jmp __tailcontext
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1: ret
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end
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.endfn swapcontext,globl
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|
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@ -24,9 +24,9 @@
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//
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// @return 0 on success, or -1 w/ errno
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sys_sched_yield:
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beg
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||||
#ifdef __x86_64__
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push %rbp
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mov %rsp,%rbp
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pro
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xor %eax,%eax
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mov __hostos(%rip),%dl
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@ -84,13 +84,16 @@ sys_sched_yield:
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// fails a positive or negative errno might get returned.
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#endif
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9: leave
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9: epi
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ret
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#elif defined(__aarch64__)
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stp x29,x30,[sp,-32]!
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mov x29,sp
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.cfi_adjust_cfa_offset 32
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.cfi_rel_offset x29,16
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.cfi_rel_offset x30,24
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mov x3,0
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mov x2,0
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add x4,sp,16
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@ -101,10 +104,14 @@ sys_sched_yield:
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mov x16,#0x5d // select(0,0,0,0,&blah) for xnu
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svc 0
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ldp x29,x30,[sp],32
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.cfi_adjust_cfa_offset -32
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.cfi_restore x30
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.cfi_restore x29
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ret
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#else
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#error "arch unsupported"
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#endif
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end
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.endfn sys_sched_yield,globl
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.previous
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@ -158,6 +158,60 @@
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.weak \canonical
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.endm
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.macro beg
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.cfi_startproc
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.endm
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.macro pro
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#if defined(__x86_64__)
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push %rbp
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.cfi_adjust_cfa_offset 8
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.cfi_rel_offset %rbp,0
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mov %rsp,%rbp
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.cfi_def_cfa_register %rbp
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#elif defined(__aarch64__)
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stp x29,x30,[sp,-16]!
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mov x29,sp
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.cfi_adjust_cfa_offset 16
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.cfi_rel_offset x29,0
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.cfi_rel_offset x30,8
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#else
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#error "unsupported architecture"
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#endif
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.endm
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.macro epi
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#if defined(__x86_64__)
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.cfi_def_cfa_register %rsp
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leave
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.cfi_adjust_cfa_offset -8
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.cfi_restore %rbp
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#elif defined(__aarch64__)
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ldp x29,x30,[sp],#16
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.cfi_adjust_cfa_offset -16
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.cfi_restore x30
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.cfi_restore x29
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#else
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#error "unsupported architecture"
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#endif
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.endm
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.macro end
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.cfi_endproc
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.endm
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.macro cpush reg:req
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push \reg
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.cfi_adjust_cfa_offset 8
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.cfi_rel_offset \reg,0
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.endm
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.macro cpop reg:req
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pop \reg
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.cfi_adjust_cfa_offset -8
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.cfi_restore \reg
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.endm
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||||
#ifdef __aarch64__
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.macro jmp dest:req
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b \dest
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|
|
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@ -7,8 +7,8 @@
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|||
// @note public domain
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||||
// @see en.wikipedia.org/wiki/Sorting_network
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djbsort_avx2:
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push %rbp
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mov %rsp,%rbp
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beg
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||||
pro
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push %r15
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push %r14
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push %r13
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|
@ -795,11 +795,13 @@ djbsort_avx2:
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pop %r13
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pop %r14
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pop %r15
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pop %rbp
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||||
epi
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||||
ret
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||||
end
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.endfn djbsort_avx2,globl,hidden
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|
||||
minmax_vector:
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beg
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||||
cmp $7,%rdx
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jg .L13
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.L2: test %rdx,%rdx
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||||
|
|
@ -838,9 +840,11 @@ minmax_vector:
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sub $8,%rdx
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jne .L7
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||||
ret
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||||
end
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||||
.endfn minmax_vector
|
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|
||||
int32_twostages_32:
|
||||
beg
|
||||
sub $-128,%rdi
|
||||
.L17: lea -128(%rdi),%rax
|
||||
test %rsi,%rsi
|
||||
|
|
@ -866,13 +870,14 @@ int32_twostages_32:
|
|||
add $512,%rdi
|
||||
jmp .L17
|
||||
.L21: ret
|
||||
end
|
||||
.endfn int32_twostages_32
|
||||
|
||||
int32_threestages:
|
||||
push %rbp
|
||||
beg
|
||||
pro
|
||||
imul $-24,%rdx,%r8
|
||||
lea 0(,%rdx,8),%rax
|
||||
mov %rsp,%rbp
|
||||
push %r15
|
||||
push %r14
|
||||
push %r13
|
||||
|
|
@ -961,11 +966,13 @@ int32_threestages:
|
|||
pop %r13
|
||||
pop %r14
|
||||
pop %r15
|
||||
pop %rbp
|
||||
epi
|
||||
ret
|
||||
end
|
||||
.endfn int32_threestages
|
||||
|
||||
merge16_finish:
|
||||
beg
|
||||
vpminsd %ymm1,%ymm0,%ymm3
|
||||
vpmaxsd %ymm1,%ymm0,%ymm0
|
||||
vperm2i128 $32,%ymm0,%ymm3,%ymm2
|
||||
|
|
@ -994,9 +1001,11 @@ merge16_finish:
|
|||
.L31: vmovdqu %ymm2,(%rdi)
|
||||
vmovdqu %ymm0,32(%rdi)
|
||||
ret
|
||||
end
|
||||
.endfn merge16_finish
|
||||
|
||||
int32_sort_2power:
|
||||
beg
|
||||
push %r13
|
||||
lea 16(%rsp),%r13
|
||||
andq $-32,%rsp
|
||||
|
|
@ -2075,6 +2084,7 @@ int32_sort_2power:
|
|||
lea -16(%r13),%rsp
|
||||
pop %r13
|
||||
ret
|
||||
end
|
||||
.endfn int32_sort_2power
|
||||
|
||||
.rodata.cst32
|
||||
|
|
|
|||
|
|
@ -32,7 +32,8 @@
|
|||
// @param rax,rdx,xmm0,xmm1,st0,st1 is return value
|
||||
// @see test/libc/runtime/gc_test.c
|
||||
.ftrace1
|
||||
__gc: .ftrace2
|
||||
__gc: beg
|
||||
.ftrace2
|
||||
|
||||
#ifdef __x86_64__
|
||||
|
||||
|
|
@ -47,8 +48,7 @@ __gc: .ftrace2
|
|||
mov 8(%r8),%r9
|
||||
mov 16(%r8),%rdi
|
||||
push 24(%r8)
|
||||
push %rbp
|
||||
mov %rsp,%rbp
|
||||
pro
|
||||
sub $32,%rsp
|
||||
mov %rax,-8(%rbp)
|
||||
mov %rdx,-16(%rbp)
|
||||
|
|
@ -57,7 +57,7 @@ __gc: .ftrace2
|
|||
movdqa -32(%rbp),%xmm0
|
||||
mov -16(%rbp),%rdx
|
||||
mov -8(%rbp),%rax
|
||||
leave
|
||||
epi
|
||||
ret
|
||||
9: ud2
|
||||
nop
|
||||
|
|
@ -102,4 +102,5 @@ __gc: .ftrace2
|
|||
|
||||
#endif /* __x86_64__ */
|
||||
|
||||
end
|
||||
.endfn __gc,globl,hidden
|
||||
|
|
|
|||
|
|
@ -31,7 +31,9 @@
|
|||
// @noreturn
|
||||
.ftrace1
|
||||
gclongjmp:
|
||||
beg
|
||||
.ftrace2
|
||||
pro
|
||||
#ifdef __x86_64__
|
||||
push %rbp
|
||||
mov %rsp,%rbp
|
||||
|
|
@ -65,4 +67,5 @@ gclongjmp:
|
|||
#else
|
||||
#error "unsupported architecture"
|
||||
#endif /* __x86_64__ */
|
||||
end
|
||||
.endfn gclongjmp,globl
|
||||
|
|
|
|||
|
|
@ -26,7 +26,7 @@
|
|||
// @see gclongjmp()
|
||||
// @see siglongjmp()
|
||||
.ftrace1
|
||||
longjmp:
|
||||
longjmp:beg
|
||||
.ftrace2
|
||||
_longjmp:
|
||||
#ifdef __x86_64__
|
||||
|
|
@ -61,6 +61,7 @@ _longjmp:
|
|||
#else
|
||||
#error "unsupported architecture"
|
||||
#endif
|
||||
end
|
||||
.endfn longjmp,globl
|
||||
.endfn _longjmp,globl
|
||||
.alias longjmp,siglongjmp
|
||||
|
|
|
|||
|
|
@ -30,8 +30,8 @@
|
|||
// @note slower than __sysv2nt
|
||||
// @see NT2SYSV() macro
|
||||
__nt2sysv:
|
||||
push %rbp
|
||||
mov %rsp,%rbp
|
||||
beg
|
||||
pro
|
||||
sub $256,%rsp
|
||||
push %rbx
|
||||
push %rdi
|
||||
|
|
@ -48,6 +48,7 @@ __nt2sysv:
|
|||
pop %rsi
|
||||
pop %rdi
|
||||
pop %rbx
|
||||
leave
|
||||
epi
|
||||
ret
|
||||
end
|
||||
.endfn __nt2sysv,globl,hidden
|
||||
|
|
|
|||
|
|
@ -30,18 +30,18 @@
|
|||
// @param 8(rsp) x6 is arg
|
||||
// @return tid of child on success, or -errno on error
|
||||
sys_clone_linux:
|
||||
beg
|
||||
pro
|
||||
#ifdef __x86_64__
|
||||
push %rbp
|
||||
mov %rsp,%rbp
|
||||
push %rbx
|
||||
cpush %rbx
|
||||
mov %rcx,%r10
|
||||
mov 16(%rbp),%rbx
|
||||
mov $56,%eax // __NR_clone
|
||||
syscall
|
||||
test %rax,%rax
|
||||
jz 2f
|
||||
0: pop %rbx
|
||||
pop %rbp
|
||||
0: cpop %rbx
|
||||
epi
|
||||
ret
|
||||
2: xor %ebp,%ebp // child thread
|
||||
mov %rbx,%rdi // arg
|
||||
|
|
@ -50,15 +50,13 @@ sys_clone_linux:
|
|||
mov $60,%eax // __NR_exit(exitcode)
|
||||
syscall
|
||||
#elif defined(__aarch64__)
|
||||
stp x29,x30,[sp,#-16]!
|
||||
mov x29,sp
|
||||
mov x8,x3 // swap x3 and x4
|
||||
mov x3,x4 // swap x3 and x4
|
||||
mov x4,x8 // swap x3 and x4
|
||||
mov x8,#220 // __NR_clone
|
||||
svc #0
|
||||
cbz x0,2f
|
||||
ldp x29,x30,[sp],#16
|
||||
epi
|
||||
ret
|
||||
2: mov x29,#0 // wipe backtrace
|
||||
mov x28,x3 // set cosmo tls
|
||||
|
|
@ -69,4 +67,5 @@ sys_clone_linux:
|
|||
#else
|
||||
#error "unsupported architecture"
|
||||
#endif
|
||||
end
|
||||
.endfn sys_clone_linux,globl,hidden
|
||||
|
|
|
|||
|
|
@ -32,8 +32,8 @@
|
|||
// @param rdx is environ
|
||||
// @param rcx is auxv
|
||||
// @noreturn
|
||||
cosmo: push %rbp
|
||||
mov %rsp,%rbp
|
||||
cosmo: beg
|
||||
pro
|
||||
mov %edi,%r12d
|
||||
mov %rsi,%r13
|
||||
mov %rdx,%r14
|
||||
|
|
@ -104,7 +104,10 @@ cosmo: push %rbp
|
|||
je 2f
|
||||
push %rax
|
||||
push %rax
|
||||
call .Largs
|
||||
mov %r12d,%edi
|
||||
mov %r13,%rsi
|
||||
mov %r14,%rdx
|
||||
mov %r15,%rcx
|
||||
call *(%rax)
|
||||
pop %rax
|
||||
pop %rax
|
||||
|
|
@ -112,17 +115,15 @@ cosmo: push %rbp
|
|||
jmp 1b
|
||||
|
||||
// call main()
|
||||
2: call .Largs
|
||||
2: mov %r12d,%edi
|
||||
mov %r13,%rsi
|
||||
mov %r14,%rdx
|
||||
mov %r15,%rcx
|
||||
.weak main
|
||||
call main
|
||||
xchg %eax,%edi
|
||||
call exit
|
||||
|
||||
.Largs: mov %r12d,%edi
|
||||
mov %r13,%rsi
|
||||
mov %r14,%rdx
|
||||
mov %r15,%rcx
|
||||
ret
|
||||
end
|
||||
.endfn cosmo,weak
|
||||
|
||||
// Enables Thread Local Storage.
|
||||
|
|
|
|||
|
|
@ -28,8 +28,12 @@ ftrace_hook:
|
|||
|
||||
cmpl $0,__ftrace(%rip)
|
||||
jle 1f
|
||||
.cfi_startproc
|
||||
push %rbp
|
||||
.cfi_def_cfa_offset 16
|
||||
.cfi_offset %rbp, -16
|
||||
mov %rsp,%rbp
|
||||
.cfi_def_cfa_register %rbp
|
||||
and $-16,%rsp
|
||||
sub $128,%rsp
|
||||
movdqu %xmm0,-0x80(%rbp)
|
||||
|
|
@ -41,13 +45,21 @@ ftrace_hook:
|
|||
movdqu %xmm6,-0x20(%rbp)
|
||||
movdqu %xmm7,-0x10(%rbp)
|
||||
push %rax
|
||||
.cfi_offset %rax, -24
|
||||
push %rcx
|
||||
.cfi_offset %rcx, -32
|
||||
push %rdx
|
||||
.cfi_offset %rdx, -40
|
||||
push %rdi
|
||||
.cfi_offset %rdi, -48
|
||||
push %rsi
|
||||
.cfi_offset %rsi, -56
|
||||
push %r8
|
||||
.cfi_offset %r8, -64
|
||||
push %r9
|
||||
.cfi_offset %r9, -72
|
||||
push %r10
|
||||
.cfi_offset %r10, -80
|
||||
call ftracer
|
||||
movdqu -0x80(%rbp),%xmm0
|
||||
movdqu -0x70(%rbp),%xmm1
|
||||
|
|
@ -66,12 +78,20 @@ ftrace_hook:
|
|||
pop %rcx
|
||||
pop %rax
|
||||
leave
|
||||
.cfi_restore %rbp
|
||||
.cfi_def_cfa %rsp, 8
|
||||
1: ret
|
||||
.cfi_endproc
|
||||
|
||||
#elif defined(__aarch64__)
|
||||
|
||||
stp x29,x30,[sp,-384]!
|
||||
.cfi_startproc
|
||||
.cfi_def_cfa_offset 384
|
||||
.cfi_offset 29, -384 // x29 (fp) is saved at [sp - 384]
|
||||
.cfi_offset 30, -376 // x30 (lr) is saved at [sp - 376]
|
||||
mov x29,sp
|
||||
.cfi_def_cfa_register 29
|
||||
stp x0,x1,[sp,16]
|
||||
|
||||
adrp x0,__ftrace
|
||||
|
|
@ -80,18 +100,45 @@ ftrace_hook:
|
|||
ble 1f
|
||||
|
||||
stp x2,x3,[sp,32]
|
||||
.cfi_offset 2, -352
|
||||
.cfi_offset 3, -344
|
||||
stp x4,x5,[sp,48]
|
||||
.cfi_offset 4, -336
|
||||
.cfi_offset 5, -328
|
||||
stp x6,x7,[sp,64]
|
||||
.cfi_offset 6, -320
|
||||
.cfi_offset 7, -312
|
||||
stp x8,x9,[sp,80]
|
||||
.cfi_offset 8, -304
|
||||
.cfi_offset 9, -296
|
||||
stp x10,x11,[sp,96]
|
||||
.cfi_offset 10, -288
|
||||
.cfi_offset 11, -280
|
||||
stp x12,x13,[sp,112]
|
||||
.cfi_offset 12, -272
|
||||
.cfi_offset 13, -264
|
||||
stp x14,x15,[sp,128]
|
||||
.cfi_offset 14, -256
|
||||
.cfi_offset 15, -248
|
||||
stp x16,x19,[sp,160]
|
||||
.cfi_offset 16, -224
|
||||
.cfi_offset 19, -216
|
||||
stp x20,x21,[sp,176]
|
||||
.cfi_offset 20, -208
|
||||
.cfi_offset 21, -200
|
||||
stp x22,x23,[sp,192]
|
||||
.cfi_offset 22, -192
|
||||
.cfi_offset 23, -184
|
||||
stp x24,x25,[sp,208]
|
||||
.cfi_offset 24, -176
|
||||
.cfi_offset 25, -168
|
||||
stp x26,x27,[sp,224]
|
||||
.cfi_offset 26, -160
|
||||
.cfi_offset 27, -152
|
||||
stp x17,x28,[sp,240]
|
||||
.cfi_offset 17, -144
|
||||
.cfi_offset 28, -136
|
||||
// No CFI directives needed for FP registers
|
||||
stp q0,q1,[sp,256]
|
||||
stp q2,q3,[sp,288]
|
||||
stp q4,q5,[sp,320]
|
||||
|
|
@ -119,7 +166,12 @@ ftrace_hook:
|
|||
|
||||
1: ldp x0,x1,[sp,16]
|
||||
ldp x29,x30,[sp],384
|
||||
.cfi_restore 29
|
||||
.cfi_restore 30
|
||||
.cfi_def_cfa 7, 0 // On some ARM systems the stack pointer is represented by register 7
|
||||
.cfi_def_cfa_offset 0
|
||||
ret
|
||||
.cfi_endproc
|
||||
|
||||
#endif /* __x86_64__ */
|
||||
.endfn ftrace_hook,globl,hidden
|
||||
|
|
|
|||
|
|
@ -102,8 +102,8 @@ __pid: .quad 0
|
|||
.previous
|
||||
|
||||
systemfive_cp:
|
||||
push %rbp
|
||||
mov %rsp,%rbp // so backtraces work
|
||||
beg
|
||||
pro
|
||||
systemfive_cancellable: // our pthread_cancel() miracle code
|
||||
cmpb $0,__tls_enabled(%rip) // inspired by the musl libc design!
|
||||
je 1f // we handle linux and bsd together!
|
||||
|
|
@ -123,7 +123,7 @@ systemfive_cancellable: // our pthread_cancel() miracle code
|
|||
clc // no cancellable system calls exist
|
||||
syscall // that have 7+ args on the bsd OSes
|
||||
systemfive_cancellable_end: // i/o calls park here for long time
|
||||
pop %rbp
|
||||
epi
|
||||
jnc 2f
|
||||
neg %rax // turns bsd errno to system v errno
|
||||
2: cmp $-4095,%rax // but we still check again on eintr
|
||||
|
|
@ -144,11 +144,13 @@ systemfive_cancellable_end: // i/o calls park here for long time
|
|||
je systemfive_errno // we aren't actually cancelled
|
||||
jmp 4f // now we are in fact cancelled
|
||||
systemfive_cancel: // SIGTHR will jump here too
|
||||
pop %rbp
|
||||
epi
|
||||
4: jmp _pthread_cancel_ack // tail call
|
||||
.weak _pthread_cancel_ack // must be linked if we're cancelled
|
||||
end
|
||||
#if IsModeDbg()
|
||||
not_a_cancellation_point: // need BEGIN/END_CANCELLATION_POINT
|
||||
beg
|
||||
nop
|
||||
.weak report_cancellation_point
|
||||
5: ezlea report_cancellation_point,cx
|
||||
|
|
@ -157,6 +159,7 @@ not_a_cancellation_point: // need BEGIN/END_CANCELLATION_POINT
|
|||
call *%rcx
|
||||
6: ud2
|
||||
nop
|
||||
end
|
||||
#endif
|
||||
.globl systemfive_cancellable_end
|
||||
.globl systemfive_cancellable
|
||||
|
|
@ -166,19 +169,20 @@ not_a_cancellation_point: // need BEGIN/END_CANCELLATION_POINT
|
|||
.Lanchorpoint:
|
||||
#if SupportsLinux() || SupportsMetal()
|
||||
systemfive_linux:
|
||||
beg
|
||||
and $0xfff,%eax // remove nonlinux bits from ordinal
|
||||
cmp $0xfff,%eax // checks if unsupported by platform
|
||||
je systemfive_enosys // never taken branches cost nothing
|
||||
btr $11,%eax // 0x800 means a call is cancellable
|
||||
jc systemfive_cp // it is handled by the holiest code
|
||||
mov %rcx,%r10 // syscall instruction clobbers %rcx
|
||||
push %rbp // linux never reads args from stack
|
||||
mov %rsp,%rbp // having frame will help backtraces
|
||||
pro // linux never reads args from stack
|
||||
syscall // this is known as a context switch
|
||||
pop %rbp // next we check to see if it failed
|
||||
epi // next we check to see if it failed
|
||||
cmp $-4095,%rax // system five nexgen32e abi § a.2.1
|
||||
jae systemfive_error // encodes errno as neg return value
|
||||
ret
|
||||
end
|
||||
.endfn systemfive_linux,globl,hidden
|
||||
systemfive_error:
|
||||
neg %eax
|
||||
|
|
@ -186,27 +190,35 @@ systemfive_error:
|
|||
.endfn systemfive_error,globl,hidden
|
||||
#endif
|
||||
systemfive_errno:
|
||||
beg
|
||||
xchg %eax,%ecx
|
||||
call __errno_location
|
||||
mov %ecx,(%rax) // normalize to c library convention
|
||||
push $-1 // negative one is only error result
|
||||
pop %rax // the push pop is to save code size
|
||||
ret
|
||||
end
|
||||
.endfn systemfive_errno,globl,hidden
|
||||
systemfive_enosys:
|
||||
beg
|
||||
mov ENOSYS(%rip),%eax
|
||||
jmp systemfive_errno
|
||||
end
|
||||
.endfn systemfive_enosys,globl,hidden
|
||||
#if SupportsNetbsd()
|
||||
systemfive_netbsd:
|
||||
beg
|
||||
shr $4*13,%rax
|
||||
jmp systemfive_bsdscrub
|
||||
end
|
||||
.endfn systemfive_netbsd,globl,hidden
|
||||
#endif
|
||||
#if SupportsOpenbsd()
|
||||
systemfive_openbsd:
|
||||
beg
|
||||
shr $4*10,%rax
|
||||
jmp systemfive_bsdscrub
|
||||
end
|
||||
.endfn systemfive_openbsd,globl,hidden
|
||||
#endif
|
||||
#if SupportsFreebsd()
|
||||
|
|
@ -222,6 +234,7 @@ systemfive_bsdscrub:
|
|||
// 𝑠𝑙𝑖𝑑𝑒
|
||||
.endfn systemfive_bsdscrub,globl,hidden
|
||||
systemfive_bsd:
|
||||
beg
|
||||
cmp $0xfff,%ax
|
||||
je systemfive_enosys
|
||||
btr $11,%eax // checks/reset the 800 cancellable bit
|
||||
|
|
@ -230,6 +243,7 @@ systemfive_bsd:
|
|||
syscall // bsd will need arg on stack sometimes
|
||||
jc systemfive_errno // bsd sets carry flag if %rax is errno
|
||||
ret
|
||||
end
|
||||
.endfn systemfive_bsd
|
||||
#endif
|
||||
#if SupportsXnu()
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue