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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/i386/linux/linux_locore.asm
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#include "linux_assym.h"			/* system definitions */

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#include <machine/asmacros.h>			/* miscellaneous asm macros */

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#include <i386/linux/linux_syscall.h>		/* system call numbers */

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	.data

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	.globl linux_platform

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linux_platform:

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	.asciz "i686"

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	.text

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ENTRY(linux_vdso_sigcode)

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	.cfi_startproc

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	.cfi_signal_frame

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	.cfi_def_cfa	%esp, LINUX_SIGF_SC

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	.cfi_offset	%gs, L_SC_GS

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	.cfi_offset	%fs, L_SC_FS

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	.cfi_offset	%es, L_SC_ES

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	.cfi_offset	%ds, L_SC_DS

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	.cfi_offset	%cs, L_SC_CS

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	.cfi_offset	%ss, L_SC_SS

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#ifdef __clang__

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	.cfi_offset	%flags, L_SC_EFLAGS

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#else

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	.cfi_offset	%eflags, L_SC_EFLAGS

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#endif

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	.cfi_offset	%edi, L_SC_EDI

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	.cfi_offset	%esi, L_SC_ESI

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	.cfi_offset	%ebp, L_SC_EBP

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	.cfi_offset	%ebx, L_SC_EBX

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	.cfi_offset	%edx, L_SC_EDX

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	.cfi_offset	%ecx, L_SC_ECX

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	.cfi_offset	%eax, L_SC_EAX

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	.cfi_offset	%eip, L_SC_EIP

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	.cfi_offset	%esp, L_SC_ESP

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	movl	%esp, %ebx			/* sigframe for sigreturn */

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	call	*%edi				/* call signal handler */

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	popl	%eax				/* gcc unwind code need this */

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	.cfi_def_cfa	%esp, LINUX_SIGF_SC-4

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	movl	$LINUX_SYS_linux_sigreturn, %eax

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	int	$0x80

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0:	jmp	0b

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	.cfi_endproc

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END(linux_vdso_sigcode)

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ENTRY(linux_vdso_rt_sigcode)

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	.cfi_startproc

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	.cfi_signal_frame

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	.cfi_def_cfa	%esp, LINUX_RT_SIGF_UC + LINUX_RT_SIGF_SC

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	.cfi_offset	%gs, L_SC_GS

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	.cfi_offset	%fs, L_SC_FS

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	.cfi_offset	%es, L_SC_ES

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	.cfi_offset	%ds, L_SC_DS

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	.cfi_offset	%cs, L_SC_CS

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	.cfi_offset	%ss, L_SC_SS

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#ifdef __clang__

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	.cfi_offset	%flags, L_SC_EFLAGS

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#else

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	.cfi_offset	%eflags, L_SC_EFLAGS

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#endif

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	.cfi_offset	%edi, L_SC_EDI

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	.cfi_offset	%esi, L_SC_ESI

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	.cfi_offset	%ebp, L_SC_EBP

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	.cfi_offset	%ebx, L_SC_EBX

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	.cfi_offset	%edx, L_SC_EDX

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	.cfi_offset	%ecx, L_SC_ECX

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	.cfi_offset	%eax, L_SC_EAX

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	.cfi_offset	%eip, L_SC_EIP

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	.cfi_offset	%esp, L_SC_ESP

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	leal	LINUX_RT_SIGF_UC(%esp), %ebx	/* linux ucontext for rt_sigreturn */

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	call	*%edi				/* call signal handler */

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	movl	$LINUX_SYS_linux_rt_sigreturn, %eax

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	int	$0x80

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0:	jmp	0b

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	.cfi_endproc

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END(linux_vdso_rt_sigcode)

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ENTRY(__kernel_sigreturn)

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	.cfi_startproc

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	.cfi_signal_frame

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	popl	%eax				/* gcc unwind code need this */

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	movl	$LINUX_SYS_linux_sigreturn, %eax

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	int	$0x80

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0:	jmp	0b

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	.cfi_endproc

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END(__kernel_sigreturn)

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ENTRY(__kernel_rt_sigreturn)

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	.cfi_startproc

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	.cfi_signal_frame

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	movl	$LINUX_SYS_linux_rt_sigreturn, %eax

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	int	$0x80

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0:	jmp	0b

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	.cfi_endproc

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END(__kernel_rt_sigreturn)

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ENTRY(__kernel_vsyscall)

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	.cfi_startproc

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	int $0x80

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	ret

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	.cfi_endproc

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END(__kernel_vsyscall)

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#if 0

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	.section .note.Linux, "a",@note

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	.long 2f - 1f		/* namesz */

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	.balign 4

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	.long 4f - 3f		/* descsz */

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	.long 0

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1:

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	.asciz "Linux"

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2:

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	.balign 4

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3:

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	.long LINUX_VERSION_CODE

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4:

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	.balign 4

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	.previous

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#endif

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