From: Julian Seward <jseward@acm.org>
Date: Sat, 19 Nov 2005 02:02:57 +0000 (+0000)
Subject: Counterpart to r5202: restore previous assembler state with .previous
X-Git-Tag: svn/VALGRIND_3_1_0~28
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19e8e951e58a21fdfd53779b4cd166ce5237c8b6;p=thirdparty%2Fvalgrind.git

Counterpart to r5202: restore previous assembler state with .previous


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5204
---

diff --git a/coregrind/m_main.c b/coregrind/m_main.c
index 71bd0e2e24..8f4b4b7c75 100644
--- a/coregrind/m_main.c
+++ b/coregrind/m_main.c
@@ -2801,6 +2801,7 @@ asm("\n"
     "\tpushl %eax\n"
     "\tcall  _start_in_C\n"
     "\thlt\n"
+    ".previous\n"
 );
 #elif defined(VGP_amd64_linux)
 asm("\n"
@@ -2818,6 +2819,7 @@ asm("\n"
     /* call _start_in_C, passing it the startup %rsp */
     "\tcall  _start_in_C\n"
     "\thlt\n"
+    ".previous\n"
 );
 #elif defined(VGP_ppc32_linux)
 asm("\n"
@@ -2843,6 +2845,7 @@ asm("\n"
     "\tmr 1,16\n"
     "\tbl _start_in_C\n"
     "\ttrap\n"
+    ".previous\n"
 );
 #else
 #error "_start: needs implementation on this platform"
diff --git a/coregrind/m_signals.c b/coregrind/m_signals.c
index 272887f6a5..9dcf1879fe 100644
--- a/coregrind/m_signals.c
+++ b/coregrind/m_signals.c
@@ -400,19 +400,22 @@ extern void my_sigreturn(void);
    ".text\n" \
    "my_sigreturn:\n" \
    "	movl	$" #name ", %eax\n" \
-   "	int	$0x80\n"
+   "	int	$0x80\n" \
+   ".previous\n"
 #elif defined(VGP_amd64_linux)
 #  define _MYSIG(name) \
    ".text\n" \
    "my_sigreturn:\n" \
    "	movq	$" #name ", %rax\n" \
-   "	syscall\n"
+   "	syscall\n" \
+   ".previous\n"
 #elif defined(VGP_ppc32_linux)
 #  define _MYSIG(name) \
    ".text\n" \
    "my_sigreturn:\n" \
    "	li	0, " #name "\n" \
-   "	sc\n"
+   "	sc\n" \
+   ".previous\n"
 #else
 #  error Unknown platform
 #endif
diff --git a/coregrind/m_syscall.c b/coregrind/m_syscall.c
index 084604c997..fa94a4b856 100644
--- a/coregrind/m_syscall.c
+++ b/coregrind/m_syscall.c
@@ -130,6 +130,7 @@ asm(
 "	popl	%edi\n"
 "	popl	%esi\n"
 "	ret\n"
+".previous\n"
 );
 #elif defined(VGP_amd64_linux)
 /* Incoming args (syscall number + up to 6 args) come in %rdi, %rsi,
@@ -163,6 +164,7 @@ asm(
 "	movq    8(%rsp), %r9\n"	 /* last arg from stack */
 "	syscall\n"
 "	ret\n"
+".previous\n"
 );
 #elif defined(VGP_ppc32_linux)
 /* Incoming args (syscall number + up to 6 args) come in %r0, %r3:%r8
@@ -194,6 +196,7 @@ asm(
 "        mfcr    4\n"           /* %cr -> low word of return var          */
 "        rlwinm  4,4,4,31,31\n" /* rotate flag bit so to lsb, and mask it */
 "        blr\n"                 /* and return                             */
+".previous\n"
 );
 #else
 #  error Unknown platform
diff --git a/coregrind/m_syswrap/syswrap-amd64-linux.c b/coregrind/m_syswrap/syswrap-amd64-linux.c
index dd64dedfb4..11e7e65411 100644
--- a/coregrind/m_syswrap/syswrap-amd64-linux.c
+++ b/coregrind/m_syswrap/syswrap-amd64-linux.c
@@ -95,6 +95,7 @@ asm(
 "   popq   %rdi\n"         // arg1 to correct arg reg
 "   ret\n"                 // jump to f
 "   ud2\n"                 // should never get here
+".previous\n"
 );
 
 /*
@@ -171,6 +172,7 @@ asm(
 
 "1:\n"  // PARENT or ERROR
 "       ret\n"
+".previous\n"
 );
 
 #undef __NR_CLONE
diff --git a/coregrind/m_syswrap/syswrap-ppc32-linux.c b/coregrind/m_syswrap/syswrap-ppc32-linux.c
index a6160f088f..63ed323ed3 100644
--- a/coregrind/m_syswrap/syswrap-ppc32-linux.c
+++ b/coregrind/m_syswrap/syswrap-ppc32-linux.c
@@ -110,6 +110,7 @@ asm(
 "   mtcr 0\n\t"            // CAB: Need this?
 "   bctr\n\t"              // jump to dst
 "   trap\n"                // should never get here
+".previous\n"
 );
 
 
@@ -206,6 +207,7 @@ asm(
 "       lwz     31,28(1)\n"
 "       addi    1,1,32\n"
 "       blr\n"
+".previous\n"
 );
 
 #undef __NR_CLONE
diff --git a/coregrind/m_syswrap/syswrap-x86-linux.c b/coregrind/m_syswrap/syswrap-x86-linux.c
index d65ece209e..8f1ecf5119 100644
--- a/coregrind/m_syswrap/syswrap-x86-linux.c
+++ b/coregrind/m_syswrap/syswrap-x86-linux.c
@@ -95,6 +95,7 @@ asm(
 "   movl $0, %ebp\n"
 "   ret\n"                 // jump to f
 "   ud2\n"                 // should never get here
+".previous\n"
 );
 
 
@@ -178,6 +179,7 @@ asm(
 "        pop     %edi\n"
 "        pop     %ebx\n"
 "        ret\n"
+".previous\n"
 );
 
 #undef FSZ