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https://github.com/edk2-porting/linux-next.git
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b428b51ed9
Fix commit 5f4c6bc1f3: it spits out warnings
about missing syscall prototype (it is in <unistd.h>) and it does not
recognize that two uses of _syscallX are to be resolved against kernel
headers in the source tree, not against _syscallX; they in fact do not
compile and would not work anyway.
If _syscallX macros will be removed from the kernel tree altogether, the
only reasonable solution for that piece of code is switching to open-coded
inline assembly (it's remapping the whole executable from memory, except
the page containing this code).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
#include <errno.h>
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#include <sys/ptrace.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#include <asm/ldt.h>
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#include "sysdep/tls.h"
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#include "uml-config.h"
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/* TLS support - we basically rely on the host's one.*/
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/* In TT mode, this should be called only by the tracing thread, and makes sense
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* only for PTRACE_SET_THREAD_AREA. In SKAS mode, it's used normally.
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*
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*/
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#ifndef PTRACE_GET_THREAD_AREA
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#define PTRACE_GET_THREAD_AREA 25
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#endif
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#ifndef PTRACE_SET_THREAD_AREA
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#define PTRACE_SET_THREAD_AREA 26
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#endif
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int os_set_thread_area(user_desc_t *info, int pid)
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{
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int ret;
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ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number,
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(unsigned long) info);
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if (ret < 0)
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ret = -errno;
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return ret;
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}
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#ifdef UML_CONFIG_MODE_SKAS
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int os_get_thread_area(user_desc_t *info, int pid)
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{
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int ret;
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ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number,
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(unsigned long) info);
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if (ret < 0)
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ret = -errno;
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return ret;
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}
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#endif
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#ifdef UML_CONFIG_MODE_TT
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#include "linux/unistd.h"
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int do_set_thread_area_tt(user_desc_t *info)
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{
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int ret;
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ret = syscall(__NR_set_thread_area,info);
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if (ret < 0) {
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ret = -errno;
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}
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return ret;
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}
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int do_get_thread_area_tt(user_desc_t *info)
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{
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int ret;
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ret = syscall(__NR_get_thread_area,info);
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if (ret < 0) {
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ret = -errno;
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}
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return ret;
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}
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#endif /* UML_CONFIG_MODE_TT */
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