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f44f1e7da7
Building a statically linked UML kernel on a Centos 6.9 host resulted in
the following linking failure (GCC 4.4, glibc-2.12):
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libpthread.a(libpthread.o):
In function `siglongjmp':
(.text+0x8490): multiple definition of `longjmp'
arch/x86/um/built-in.o:/local/users/fainelli/openwrt/trunk/build_dir/target-x86_64_musl/linux-uml/linux-4.4.69/arch/x86/um/setjmp_64.S:44:
first defined here
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libpthread.a(libpthread.o):
In function `sem_open':
(.text+0x77cd): warning: the use of `mktemp' is dangerous, better use
`mkstemp'
collect2: ld returned 1 exit status
make[4]: *** [vmlinux] Error 1
Adopt a solution similar to the one done for vmap where we define
longjmp/setjmp to be kernel_longjmp/setjmp. In the process, make sure we
do rename the functions in arch/x86/um/setjmp_*.S accordingly.
Fixes: a7df4716d1 ("um: link with -lpthread")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
55 lines
1002 B
ArmAsm
55 lines
1002 B
ArmAsm
#
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# arch/x86_64/setjmp.S
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#
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# setjmp/longjmp for the x86-64 architecture
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#
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#
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# The jmp_buf is assumed to contain the following, in order:
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# %rbx
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# %rsp (post-return)
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# %rbp
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# %r12
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# %r13
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# %r14
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# %r15
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# <return address>
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#
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.text
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.align 4
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.globl kernel_setjmp
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.type kernel_setjmp, @function
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kernel_setjmp:
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pop %rsi # Return address, and adjust the stack
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xorl %eax,%eax # Return value
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movq %rbx,(%rdi)
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movq %rsp,8(%rdi) # Post-return %rsp!
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push %rsi # Make the call/return stack happy
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movq %rbp,16(%rdi)
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movq %r12,24(%rdi)
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movq %r13,32(%rdi)
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movq %r14,40(%rdi)
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movq %r15,48(%rdi)
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movq %rsi,56(%rdi) # Return address
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ret
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.size kernel_setjmp,.-kernel_setjmp
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.text
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.align 4
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.globl kernel_longjmp
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.type kernel_longjmp, @function
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kernel_longjmp:
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movl %esi,%eax # Return value (int)
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movq (%rdi),%rbx
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movq 8(%rdi),%rsp
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movq 16(%rdi),%rbp
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movq 24(%rdi),%r12
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movq 32(%rdi),%r13
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movq 40(%rdi),%r14
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movq 48(%rdi),%r15
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jmp *56(%rdi)
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.size kernel_longjmp,.-kernel_longjmp
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