diff options
Diffstat (limited to 'coregrind/m_main.c')
| -rw-r--r-- | coregrind/m_main.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/coregrind/m_main.c b/coregrind/m_main.c index d5e762dc..acfcdda7 100644 --- a/coregrind/m_main.c +++ b/coregrind/m_main.c @@ -1626,6 +1626,7 @@ Int valgrind_main ( Int argc, HChar **argv, HChar **envp ) "AMD Athlon or above)\n"); VG_(printf)(" * AMD Athlon64/Opteron\n"); VG_(printf)(" * PowerPC (most; ppc405 and above)\n"); + VG_(printf)(" * System z (64bit only - s390x; z900 and above)\n"); VG_(printf)("\n"); VG_(exit)(1); } @@ -1937,6 +1938,8 @@ Int valgrind_main ( Int argc, HChar **argv, HChar **envp ) iters = 5; # elif defined(VGP_arm_linux) iters = 1; +# elif defined(VGP_s390x_linux) + iters = 10; # elif defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) iters = 4; # elif defined(VGO_darwin) @@ -2777,6 +2780,47 @@ asm("\n" "\tnop\n" "\ttrap\n" ); +#elif defined(VGP_s390x_linux) +/* + This is the canonical entry point, usually the first thing in the text + segment. Most registers' values are unspecified, except for: + + %r14 Contains a function pointer to be registered with `atexit'. + This is how the dynamic linker arranges to have DT_FINI + functions called for shared libraries that have been loaded + before this code runs. + + %r15 The stack contains the arguments and environment: + 0(%r15) argc + 8(%r15) argv[0] + ... + (8*argc)(%r15) NULL + (8*(argc+1))(%r15) envp[0] + ... + NULL +*/ +asm("\n\t" + ".text\n\t" + ".globl _start\n\t" + ".type _start,@function\n\t" + "_start:\n\t" + /* set up the new stack in %r1 */ + "larl %r1, vgPlain_interim_stack\n\t" + "larl %r5, 1f\n\t" + "ag %r1, 0(%r5)\n\t" + "ag %r1, 2f-1f(%r5)\n\t" + "nill %r1, 0xFFF0\n\t" + /* install it, and collect the original one */ + "lgr %r2, %r15\n\t" + "lgr %r15, %r1\n\t" + /* call _start_in_C_linux, passing it the startup %r15 */ + "brasl %r14, _start_in_C_linux\n\t" + /* trigger execution of an invalid opcode -> halt machine */ + "j .+2\n\t" + "1: .quad "VG_STRINGIFY(VG_STACK_GUARD_SZB)"\n\t" + "2: .quad "VG_STRINGIFY(VG_STACK_ACTIVE_SZB)"\n\t" + ".previous\n" +); #elif defined(VGP_arm_linux) asm("\n" "\t.align 2\n" |