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include(CheckCSourceCompiles)
include(CheckIncludeFile)
macro(pc_from_ucontext variable)
set(HAVE_${variable} OFF)
check_include_file("ucontext.h" HAVE_UCONTEXT_H)
if(EXISTS /etc/redhat-release)
set(redhat7_release_pattern "Red Hat Linux release 7")
file(STRINGS /etc/redhat-release redhat_release_match
LIMIT_COUNT 1
REGEX ${redhat7_release_pattern})
if(redhat_release_match MATCHES ${redhat7_release_pattern})
set(HAVE_SYS_UCONTEXT_H OFF)
else()
check_include_file("sys/ucontext.h" HAVE_SYS_UCONTEXT_H)
endif()
else()
check_include_file("sys/ucontext.h" HAVE_SYS_UCONTEXT_H)
endif()
check_include_file("cygwin/signal.h" HAVE_CYGWIN_SIGNAL_H)
set(pc_fields
"uc_mcontext.gregs[REG_PC]" # Solaris x86 (32 + 64 bit)
"uc_mcontext.gregs[REG_EIP]" # Linux (i386)
"uc_mcontext.gregs[REG_RIP]" # Linux (x86_64)
"uc_mcontext.sc_ip" # Linux (ia64)
"uc_mcontext.pc" # Linux (mips)
"uc_mcontext.uc_regs->gregs[PT_NIP]" # Linux (ppc)
"uc_mcontext.psw.addr" # Linux (s390)
"uc_mcontext.gregs[R15]" # Linux (arm old [untested])
"uc_mcontext.arm_pc" # Linux (arm arch 5)
"uc_mcontext.gp_regs[PT_NIP]" # Suse SLES 11 (ppc64)
"uc_mcontext.mc_eip" # FreeBSD (i386)
"uc_mcontext.mc_rip" # FreeBSD (x86_64 [untested])
"uc_mcontext.__gregs[_REG_EIP]" # NetBSD (i386)
"uc_mcontext.__gregs[_REG_RIP]" # NetBSD (x86_64)
"uc_mcontext->ss.eip" # OS X (i386, <=10.4)
"uc_mcontext->__ss.__eip" # OS X (i386, >=10.5)
"uc_mcontext->ss.rip" # OS X (x86_64)
"uc_mcontext->__ss.__rip" # OS X (>=10.5 [untested])
"uc_mcontext->ss.srr0" # OS X (ppc, ppc64 [untested])
"uc_mcontext->__ss.__srr0") # OS X (>=10.5 [untested])
set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE=1)
if(HAVE_CYGWIN_SIGNAL_H)
set(_inc "cygwin/signal.h")
elseif(HAVE_SYS_UCONTEXT_H)
set(_inc "sys/ucontext.h")
elseif(HAVE_UCONTEXT_H)
set(_inc "ucontext.h")
endif()
foreach(pc_field IN LISTS pc_fields)
string(MAKE_C_IDENTIFIER ${pc_field} pc_field_id)
check_c_source_compiles(
"#include <${_inc}>\nint main() { ucontext_t u; return u.${pc_field} == 0; }"
HAVE_${pc_field_id})
if(HAVE_${pc_field_id})
set(HAVE_${variable} ON)
set(${variable} ${pc_field})
break()
endif()
endforeach()
endmacro()
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