############################################################################

##  mmglue: midipix architecture- and target-specific bits for musl libc  ##

##  Copyright (C) 2013--2023  SysDeer Technologies, LLC                   ##

##  Released under the Standard MIT License; see COPYING.MMGLUE.          ##

############################################################################

.text

.globl	___sigsetjmp

.globl	_sigsetjmp

.def __sigsetjmp; .scl 2; .type 32; .endef

.def sigsetjmp; .scl 2; .type 32; .endef

___sigsetjmp:

_sigsetjmp:

				# int sigsetjmp(sigjmp_buf jmp_buf, int save_mask);

				#

				# 8(%esp): save_mask

				# 4(%esp): jmp_buf

				# 0(%esp): return address

	movl  8(%esp),%edx	# edx  <-- save_mask

	test  %edx,%edx 	# save signal mask?

	jnz   1f		# yes: save mask

	jmp   ___setjmp		# no:  setjmp

1:

				# typedef unsigned long __jmp_buf[6];

				#

				# typedef struct __jmp_buf_tag {

				#	__jmp_buf __jb;

				#	unsigned long __fl;

				# 	unsigned long __ss[16];

				# }

				#

	movl  4(%esp),%ecx	# ecx  <-- jmp_buf

	popl  36(%ecx) 		# save return address to .__ss[2]

	movl  %ebx,40(%ecx)	# save ebx (arbitrary choice) to .__ss[3]

	movl  %ecx,%ebx		# save pointer to __jmp_buf to ebx

	call  ___setjmp

	pushl 36(%ebx) 		# push previously saved return address

	movl  %ebx,4(%esp) 	# save pointer to __jmp_buf to 4(%esp) (arg 0)

	movl  %eax,8(%esp)	# save setjmp return value to 8(%esp) (arg 1)

	movl  40(%ebx),%ebx	# restore ebx from .__ss[3]

	jmp ___sigsetjmp_tail	# defer to __sigsetjmp_tail

	.section .got$sigsetjmp,"r"

	.global __imp__sigsetjmp

__imp__sigsetjmp:

	.long _sigsetjmp

	.linkonce discard