37 lines
837 B
ArmAsm
37 lines
837 B
ArmAsm
/*
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* \brief Linux syscall() binding
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* \author Christian Prochaska
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* \date 2009-07-14
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*
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* based on glibc-2.9/sysdeps/unix/sysv/linux/x86_64/syscall.S
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*
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* error case:
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* glibc's syscall() function returns -1 and sets errno
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* lx_syscall() returns -errno
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*/
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#define L(name) name
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.text
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.globl lx_syscall
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.type lx_syscall, @function
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lx_syscall:
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movq %rdi, %rax /* Syscall number -> rax. */
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movq %rsi, %rdi /* shift arg1 - arg5. */
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movq %rdx, %rsi
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movq %rcx, %rdx
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movq %r8, %r10
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movq %r9, %r8
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movq 8(%rsp),%r9 /* arg6 is on the stack. */
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syscall /* Do the system call. */
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L(pseudo_end):
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ret /* Return to caller. */
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/*
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* Allow stacks to be mapped executable (needed because Genode does not
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* offer an API to handle non-execute mappings yet).
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*/
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.section .note.GNU-stack, "", @progbits
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