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disas: include an optional note for the start of disassembly

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This will become useful shortly for providing more information about
output assembly inline. While there fix up the indenting and code
formatting in disas().

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Message-Id: <20200513175134.19619-9-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2020-05-13 18:51:32 +01:00
parent 6a7aa856c5
commit e5ef4ec28b
5 changed files with 17 additions and 11 deletions
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4
accel/tcg/translate-all.c
View File

@ -1800,7 +1800,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
size_t data_size = gen_code_size - code_size;
size_t i;
log_disas(tb->tc.ptr, code_size);
log_disas(tb->tc.ptr, code_size, NULL);
for (i = 0; i < data_size; i += sizeof(tcg_target_ulong)) {
if (sizeof(tcg_target_ulong) == 8) {
@ -1814,7 +1814,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
}
}
} else {
log_disas(tb->tc.ptr, gen_code_size);
log_disas(tb->tc.ptr, gen_code_size, NULL);
}
qemu_log("\n");
qemu_log_flush();

14
disas.c
View File

@ -586,7 +586,7 @@ char *plugin_disas(CPUState *cpu, uint64_t addr, size_t size)
}
/* Disassemble this for me please... (debugging). */
void disas(FILE *out, void *code, unsigned long size)
void disas(FILE *out, void *code, unsigned long size, const char *note)
{
uintptr_t pc;
int count;
@ -674,10 +674,16 @@ void disas(FILE *out, void *code, unsigned long size)
for (pc = (uintptr_t)code; size > 0; pc += count, size -= count) {
fprintf(out, "0x%08" PRIxPTR ": ", pc);
count = print_insn(pc, &s.info);
fprintf(out, "\n");
if (count < 0)
break;
if (note) {
fprintf(out, "\t\t%s", note);
note = NULL;
}
fprintf(out, "\n");
if (count < 0) {
break;
}
}
}
/* Look up symbol for debugging purpose. Returns "" if unknown. */

2
include/disas/disas.h
View File

@ -7,7 +7,7 @@
#include "cpu.h"
/* Disassemble this for me please... (debugging). */
void disas(FILE *out, void *code, unsigned long size);
void disas(FILE *out, void *code, unsigned long size, const char *note);
void target_disas(FILE *out, CPUState *cpu, target_ulong code,
target_ulong size);

4
include/exec/log.h
View File

@ -56,13 +56,13 @@ static inline void log_target_disas(CPUState *cpu, target_ulong start,
rcu_read_unlock();
}
static inline void log_disas(void *code, unsigned long size)
static inline void log_disas(void *code, unsigned long size, const char *note)
{
QemuLogFile *logfile;
rcu_read_lock();
logfile = atomic_rcu_read(&qemu_logfile);
if (logfile) {
disas(logfile->fd, code, size);
disas(logfile->fd, code, size, note);
}
rcu_read_unlock();
}

4
tcg/tcg.c
View File

@ -1092,7 +1092,7 @@ void tcg_prologue_init(TCGContext *s)
size_t data_size = prologue_size - code_size;
size_t i;
log_disas(buf0, code_size);
log_disas(buf0, code_size, NULL);
for (i = 0; i < data_size; i += sizeof(tcg_target_ulong)) {
if (sizeof(tcg_target_ulong) == 8) {
@ -1106,7 +1106,7 @@ void tcg_prologue_init(TCGContext *s)
}
}
} else {
log_disas(buf0, prologue_size);
log_disas(buf0, prologue_size, NULL);
}
qemu_log("\n");
qemu_log_flush();