4a9b1c6aab
This patch introduces a new platform 'linux_arm' for building and running Genode/Linux on an ARM device. Known limitations: - libc 'setjmp()'/'longjmp()' doesn't currently save/restore floating point registers Fixes #746.
30 lines
619 B
ArmAsm
30 lines
619 B
ArmAsm
/*
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* \brief Linux syscall() binding
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* \author Christian Prochaska
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* \date 2012-05-05
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*
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* based on eglibc-2.11.3/ports/sysdeps/unix/sysv/linux/arm/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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.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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mov ip, sp
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stmfd sp!, {r4, r5, r6, r7}
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mov r7, r0
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mov r0, r1
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mov r1, r2
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mov r2, r3
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ldmfd ip, {r3, r4, r5, r6}
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swi 0x0
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ldmfd sp!, {r4, r5, r6, r7}
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bx lr
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/* tell the linker that this code does not need an executable stack */
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.section .note.GNU-stack, "", %progbits
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