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Code Issues Releases Activity

Allow IA64 cross-compilation

Browse source 
Change the way we generate the cursor header files, so that we do not
need to invoke IA64 binaries, which would fail when cross-compiling
libunwind.

Adopt the strategy used in the Linux kernel build system, and parse our
annotated offset information from the assembler file produced by the
compiler.
This commit is contained in:
Tommi Rantala 2012-07-31 15:01:02 +03:00
parent a06f189baf
commit 354b3fd45b
3 changed files with 40 additions and 73 deletions
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15
src/Makefile.am
View file

@ -400,14 +400,15 @@ endif
libunwind_setjmp_la_SOURCES += arm/siglongjmp.S
else
if ARCH_IA64
ia64_mk_Gcursor_i_SOURCES = ia64/mk_Gcursor_i.c
ia64_mk_Lcursor_i_SOURCES = ia64/mk_Lcursor_i.c
noinst_PROGRAMS = ia64/mk_Gcursor_i ia64/mk_Lcursor_i
BUILT_SOURCES = Gcursor_i.h Lcursor_i.h
Gcursor_i.h: ia64/mk_Gcursor_i
ia64/mk_Gcursor_i > $@
Lcursor_i.h: ia64/mk_Lcursor_i
ia64/mk_Lcursor_i > $@
mk_Gcursor_i.s: ia64/mk_Gcursor_i.c
$(COMPILE) -S ia64/mk_Gcursor_i.c -o mk_Gcursor_i.s
mk_Lcursor_i.s: ia64/mk_Lcursor_i.c
$(COMPILE) -S ia64/mk_Lcursor_i.c -o mk_Lcursor_i.s
Gcursor_i.h: mk_Gcursor_i.s
ia64/mk_cursor_i mk_Gcursor_i.s > Gcursor_i.h
Lcursor_i.h: mk_Lcursor_i.s
ia64/mk_cursor_i mk_Lcursor_i.s > Lcursor_i.h
lib_LTLIBRARIES += libunwind-ia64.la
libunwind_la_SOURCES = $(libunwind_la_SOURCES_ia64)

91
src/ia64/mk_Gcursor_i.c
View file

@ -25,8 +25,6 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/* Utility to generate cursor_i.h. */
#include <stdio.h>
#include "libunwind_i.h"
#ifdef offsetof
@ -35,72 +33,33 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#define offsetof(type,field) ((char *) &((type *) 0)->field - (char *) 0)
static struct
{
const char name[256];
unsigned long value;
}
tab[] =
{
{ "IP_OFF", offsetof (struct cursor, ip) },
{ "PR_OFF", offsetof (struct cursor, pr) },
{ "BSP_OFF", offsetof (struct cursor, bsp) },
{ "PSP_OFF", offsetof (struct cursor, psp) },
{ "PFS_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_PFS]) },
{ "RNAT_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_RNAT]) },
{ "UNAT_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_UNAT]) },
{ "LC_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_LC]) },
{ "FPSR_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_FPSR]) },
{ "B1_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B1]) },
{ "B2_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B2]) },
{ "B3_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B3]) },
{ "B4_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B4]) },
{ "B5_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B5]) },
{ "F2_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F2]) },
{ "F3_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F3]) },
{ "F4_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F4]) },
{ "F5_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F5]) },
{ "FR_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F16]) },
{ "LOC_SIZE",
(offsetof (struct cursor, loc[1]) - offsetof (struct cursor, loc[0]))
},
{ "SIGCONTEXT_ADDR_OFF", offsetof (struct cursor, sigcontext_addr) },
};
static const char *tabs = "\t\t\t\t\t\t\t\t\t\t";
#define OFFSET(sym, offset) \
asm volatile("\n->" #sym " %0" : : "i" (offset))
int
main (int argc, char **argv)
main (void)
{
const char *space;
int i, num_tabs;
size_t len;
printf ("#ifndef cursor_i_h\n");
printf ("#define cursor_i_h\n\n");
printf ("/*\n * DO NOT MODIFY\n *\n * This file was generated by "
"%s.\n *\n */\n\n", argv[0]);
for (i = 0; i < (int) (sizeof (tab) / sizeof (tab[0])); ++i)
{
if (tab[i].name[0] == '\0')
printf ("\n");
else
{
len = strlen (tab[i].name);
num_tabs = (40 - len) / 8;
if (num_tabs <= 0)
space = " ";
else
space = strchr(tabs, '\0') - (40 - len) / 8;
printf ("#define %s%s%lu\t/* 0x%lx */\n",
tab[i].name, space, tab[i].value, tab[i].value);
}
}
printf ("\n#endif /* cursor_i_h */\n");
OFFSET("IP_OFF", offsetof (struct cursor, ip));
OFFSET("PR_OFF", offsetof (struct cursor, pr));
OFFSET("BSP_OFF", offsetof (struct cursor, bsp));
OFFSET("PSP_OFF", offsetof (struct cursor, psp));
OFFSET("PFS_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_PFS]));
OFFSET("RNAT_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_RNAT]));
OFFSET("UNAT_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_UNAT]));
OFFSET("LC_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_LC]));
OFFSET("FPSR_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_FPSR]));
OFFSET("B1_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B1]));
OFFSET("B2_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B2]));
OFFSET("B3_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B3]));
OFFSET("B4_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B4]));
OFFSET("B5_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_B5]));
OFFSET("F2_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F2]));
OFFSET("F3_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F3]));
OFFSET("F4_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F4]));
OFFSET("F5_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F5]));
OFFSET("FR_LOC_OFF", offsetof (struct cursor, loc[IA64_REG_F16]));
OFFSET("LOC_SIZE",
(offsetof (struct cursor, loc[1]) - offsetof (struct cursor, loc[0])));
OFFSET("SIGCONTEXT_ADDR_OFF", offsetof (struct cursor, sigcontext_addr));
return 0;
}

7
src/ia64/mk_cursor_i Executable file
View file

@ -0,0 +1,7 @@
#!/bin/sh
test -z "$1" && exit 1
echo "/* GENERATED */"
echo "#ifndef cursor_i_h"
echo "#define cursor_i_h"
sed -ne 's/^->"\(\S*\)" \(\d*\)/#define \1 \2/p' < $1 || exit $?
echo "#endif"