#define MASK_NO_IDENT 0x08000000 /* suppress .ident */
#define MASK_NO_UNDERSCORES 0x04000000 /* suppress leading _ */
#define MASK_LARGE_ALIGN 0x02000000 /* align to >word boundaries */
-#define MASK_MCOUNT 0x01000000 /* profiling uses mcount */
+#define MASK_NO_MCOUNT 0x01000000 /* profiling uses mcount_ptr */
#define TARGET_HALF_PIC (target_flags & MASK_HALF_PIC)
#define TARGET_DEBUG (target_flags & MASK_HALF_PIC_DEBUG)
#define TARGET_IDENT ((target_flags & MASK_NO_IDENT) == 0)
#define TARGET_UNDERSCORES ((target_flags & MASK_NO_UNDERSCORES) == 0)
#define TARGET_LARGE_ALIGN (target_flags & MASK_LARGE_ALIGN)
-#define TARGET_MCOUNT (target_flags & MASK_MCOUNT)
+#define TARGET_MCOUNT ((target_flags & MASK_NO_MCOUNT) == 0)
#undef SUBTARGET_SWITCHES
#define SUBTARGET_SWITCHES \
{ "no-underscores", MASK_NO_UNDERSCORES}, \
{ "large-align", MASK_LARGE_ALIGN}, \
{ "no-large-align",-MASK_LARGE_ALIGN}, \
- { "mcount", MASK_MCOUNT}, \
- { "no-mcount", -MASK_MCOUNT},
+ { "mcount", -MASK_NO_MCOUNT}, \
+ { "no-mcount", MASK_NO_MCOUNT},
/* OSF/rose uses stabs, not dwarf. */
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
/* Temporarily turn off long double being 96 bits. */
#undef LONG_DOUBLE_TYPE_SIZE
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE, LABELNO) \
+/* This macro generates the assembly code for function entry.
+ FILE is a stdio stream to output the code to.
+ SIZE is an int: how many units of temporary storage to allocate.
+ Refer to the array `regs_ever_live' to determine which registers
+ to save; `regs_ever_live[I]' is nonzero if register number I
+ is ever used in the function. This macro is responsible for
+ knowing which registers should not be saved even if used.
+
+ We override it here to allow for the new profiling code to go before
+ the prologue and the old mcount code to go after the prologue (and
+ after %ebx has been set up for ELF shared library support). */
+
+#define OSF_PROFILE_BEFORE_PROLOGUE \
+ (!TARGET_MCOUNT \
+ && !current_function_needs_context \
+ && (!flag_pic \
+ || !frame_pointer_needed \
+ || (!current_function_uses_pic_offset_table \
+ && !current_function_uses_const_pool)))
+
+#undef FUNCTION_PROLOGUE
+#define FUNCTION_PROLOGUE(FILE, SIZE) \
do \
{ \
- if (TARGET_MCOUNT && flag_pic) \
- { \
- fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%edx\n", \
- LPREFIX, LABELNO); \
- fprintf (FILE, "\tcall *_mcount@GOT(%%ebx)\n"); \
- } \
+ char *prefix = (TARGET_UNDERSCORES) ? "_" : ""; \
+ char *lprefix = LPREFIX; \
+ int labelno = profile_label_no; \
\
- /* Note that OSF/rose blew it in terms of calling mcount, since \
- OSF/rose prepends a leading underscore, but mcount's doesn't. \
- OSF/elf fixes this by not prepending leading underscores. */ \
- else if (TARGET_MCOUNT) \
+ if (profile_flag && OSF_PROFILE_BEFORE_PROLOGUE) \
{ \
- fprintf (FILE, "\tmovl $%sP%d,%%edx\n", LPREFIX, LABELNO); \
- fprintf (FILE, "\tcall _mcount\n"); \
+ if (!flag_pic) \
+ { \
+ fprintf (FILE, "\tleal %sP%d,%%edx\n", lprefix, labelno); \
+ fprintf (FILE, "\tcall *%s_mcount_ptr\n", prefix); \
+ } \
+ else \
+ { \
+ static int call_no = 0; \
+ \
+ fprintf (FILE, "\tcall %sPc%d\n", lprefix, call_no); \
+ fprintf (FILE, "%sPc%d:\tpopl %%eax\n", lprefix, call_no); \
+ fprintf (FILE, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-%sPc%d],%%eax\n", \
+ lprefix, call_no++); \
+ fprintf (FILE, "\tleal $%sP%d@GOTOFF(%%eax),%%edx\n", \
+ lprefix, labelno); \
+ fprintf (FILE, "\tmovl %s_mcount_ptr@GOT(%%eax),%%eax\n", \
+ prefix); \
+ fprintf (FILE, "\tcall *%%eax\n"); \
+ } \
} \
\
- else \
+ function_prologue (FILE, SIZE); \
+ } \
+while (0)
+
+/* A C statement or compound statement to output to FILE some assembler code to
+ call the profiling subroutine `mcount'. Before calling, the assembler code
+ must load the address of a counter variable into a register where `mcount'
+ expects to find the address. The name of this variable is `LP' followed by
+ the number LABELNO, so you would generate the name using `LP%d' in a
+ `fprintf'.
+
+ The details of how the address should be passed to `mcount' are determined
+ by your operating system environment, not by GNU CC. To figure them out,
+ compile a small program for profiling using the system's installed C
+ compiler and look at the assembler code that results. */
+
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE, LABELNO) \
+do \
+ { \
+ if (!OSF_PROFILE_BEFORE_PROLOGUE) \
{ \
- char *underscore = (TARGET_UNDERSCORES) ? "_" : ""; \
- char *func = IDENTIFIER_POINTER (DECL_NAME (current_function_decl)); \
+ char *prefix = (TARGET_UNDERSCORES) ? "_" : ""; \
+ char *lprefix = LPREFIX; \
+ int labelno = LABELNO; \
+ \
+ /* Note that OSF/rose blew it in terms of calling mcount, \
+ since OSF/rose prepends a leading underscore, but mcount's \
+ doesn't. At present, we keep this kludge for ELF as well \
+ to allow old kernels to build profiling. */ \
+ \
+ if (flag_pic \
+ && !current_function_uses_pic_offset_table \
+ && !current_function_uses_const_pool) \
+ abort (); \
\
- if (flag_pic) \
+ if (TARGET_MCOUNT && flag_pic) \
{ \
- fprintf (FILE, "\tmovl %s_real_mcount@GOT(%%ebx),%%eax)\n", \
- underscore); \
- fprintf (FILE, "\tmovl (%%eax),%%eax\n"); \
+ fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%edx\n", \
+ lprefix, labelno); \
+ fprintf (FILE, "\tcall *%smcount@GOT(%%ebx)\n", prefix); \
} \
- else \
- fprintf (FILE, "\tmovl %s_real_mcount,%%eax\n", underscore); \
- \
- fprintf (FILE, "\tcmpl $0,%%eax\n"); \
- fprintf (FILE, "\tje 1f\n"); \
\
- if (flag_omit_frame_pointer) \
- abort (); \
- else \
- fprintf (FILE, "\tmovl 4(%%ebp),%%ecx\n"); \
+ else if (TARGET_MCOUNT) \
+ { \
+ fprintf (FILE, "\tmovl $%sP%d,%%edx\n", lprefix, labelno); \
+ fprintf (FILE, "\tcall %smcount\n", prefix); \
+ } \
\
- if (flag_pic) \
+ else if (flag_pic && frame_pointer_needed) \
{ \
- fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%edx\n", \
- LPREFIX, LABELNO); \
- fprintf (FILE, "\tpushl %%edx\n"); \
- fprintf (FILE, "\tpushl %%ecx\n"); \
- fprintf (FILE, "\tleal $%s%s@GOTOFF(%%ebx),%%ecx\n", \
- underscore, func); \
+ fprintf (FILE, "\tmovl 4(%%ebp),%%ecx\n"); \
fprintf (FILE, "\tpushl %%ecx\n"); \
+ fprintf (FILE, "\tleal $%sP%d@GOTOFF(%%ebx),%%edx\n", \
+ lprefix, labelno); \
+ fprintf (FILE, "\tmovl _mcount_ptr@GOT(%%eax),%%eax\n"); \
+ fprintf (FILE, "\tcall *%%eax\n"); \
+ fprintf (FILE, "\tpopl %%eax\n"); \
} \
- else \
+ \
+ else if (frame_pointer_needed) \
{ \
- fprintf (FILE, "\tpushl $%sP%d\n", LPREFIX, LABELNO); \
+ fprintf (FILE, "\tmovl 4(%%ebp),%%ecx\n"); \
fprintf (FILE, "\tpushl %%ecx\n"); \
- fprintf (FILE, "\tpushl $%s%s\n", underscore, func); \
+ fprintf (FILE, "\tleal $%sP%d,%%edx\n", lprefix, labelno); \
+ fprintf (FILE, "\tcall *_mcount_ptr\n"); \
+ fprintf (FILE, "\tpopl %%eax\n"); \
} \
\
- fprintf (FILE, "\tcall *%%eax\n"); \
- fprintf (FILE, "\taddl $12,%%esp\n1:\n"); \
+ else \
+ abort (); \
} \
} \
while (0)
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