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