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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:
test %edx,%edx # save signal mask?
jnz 1f # yes: save mask
jmp setjmp # no: setjmp
1:
# typedef unsigned long __jmp_buf[10];
#
# typedef struct __jmp_buf_tag {
# __jmp_buf __jb;
# unsigned long __fl;
# unsigned long __ss[16];
# }
#
popq 0x68(%rcx) # save return address to .__ss[2]
movq %rbx,0x70(%rcx) # save rbx (arbitrary choice) to .__ss[3]
movq %rcx,%rbx # save pointer to __jmp_buf to rbx
call __setjmp
pushq 0x68(%rbx) # push previously saved return address
movq %rbx,%rcx # save pointer to __jmp_buf to rcx (arg 0)
movl %eax,%edx # save setjmp return value to rdx (arg 1)
movq 0x70(%rcx),%rbx # restore rbx from .__ss[3]
jmp __sigsetjmp_tail # defer to __sigsetjmp_tail
.section .got$sigsetjmp,"r"
.global __imp_sigsetjmp
__imp_sigsetjmp:
.quad sigsetjmp
.linkonce discard
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