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| author | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2018-04-27 11:52:21 +0200 |
|---|---|---|
| committer | Luc Van Oostenryck <luc.vanoostenryck@gmail.com> | 2018-05-01 14:09:21 +0200 |
| commit | e517edeb7cac6ecda0a951b776fae8d640df5fb2 (patch) | |
| tree | c75edfaa7a76f9f36ce73c01318a27f190058dd0 /lib.c | |
| parent | 08482b36803bbd896fb2a429b35a75629b23e067 (diff) | |
| download | sparse-dev-e517edeb7cac6ecda0a951b776fae8d640df5fb2.tar.gz | |
add a flag -mx32 ILP32 env on 64 bit archs
Currently, we have the -m32 & -m64 flags to force sparse to
behave as a 32 or 64 bit arch, independently of the arch used
to build sparse. Good.
However, on x86-64, '-m32' is there to force the 32 bit instructions
& ABI but there is another flag '-mx32' for the x32 ABI which use the
x86-64 instructions / 64 bit registers but where the pointers and
long ints are 32 bit.
Add the same flag, '-mx32', to support this ABI with the proper size
alignment for pointers and longs and to predefine __ILP32__ as it is
done by 'GCC -mx32'.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Acked-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Diffstat (limited to 'lib.c')
| -rw-r--r-- | lib.c | 12 |
1 files changed, 12 insertions, 0 deletions
@@ -278,12 +278,15 @@ static enum { STANDARD_C89, enum { ARCH_LP32, + ARCH_X32, ARCH_LP64, ARCH_LLP64, }; #ifdef __LP64__ #define ARCH_M64_DEFAULT ARCH_LP64 +#elif defined(__x86_64__) +#define ARCH_M64_DEFAULT ARCH_X32 #else #define ARCH_M64_DEFAULT ARCH_LP32 #endif @@ -427,6 +430,8 @@ static char **handle_switch_m(char *arg, char **next) arch_m64 = ARCH_LP64; } else if (!strcmp(arg, "m32")) { arch_m64 = ARCH_LP32; + } else if (!strcmp(arg, "mx32")) { + arch_m64 = ARCH_X32; } else if (!strcmp(arg, "msize-llp64")) { arch_m64 = ARCH_LLP64; } else if (!strcmp(arg, "msize-long")) { @@ -444,6 +449,11 @@ static char **handle_switch_m(char *arg, char **next) static void handle_arch_m64_finalize(void) { switch (arch_m64) { + case ARCH_X32: + max_int_alignment = 8; + add_pre_buffer("#weak_define __ILP32__ 1\n"); + add_pre_buffer("#weak_define _ILP32 1\n"); + goto case_x86_64; case ARCH_LP32: /* default values */ return; @@ -465,6 +475,8 @@ static void handle_arch_m64_finalize(void) case_64bit_common: bits_in_pointer = 64; pointer_alignment = 8; + /* fall through */ + case_x86_64: #ifdef __x86_64__ add_pre_buffer("#weak_define __x86_64__ 1\n"); #endif |